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Allow custom kernel boot args via --kernel-arg - #1744

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crosbymichael merged 1 commit into
apple:mainfrom
arirubinstein:kernel-arg-boot-args
Jul 27, 2026
Merged

Allow custom kernel boot args via --kernel-arg#1744
crosbymichael merged 1 commit into
apple:mainfrom
arirubinstein:kernel-arg-boot-args

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@arirubinstein

@arirubinsteinarirubinstein commented Jun 17, 2026•
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Type of Change

  • Bug fix
  • New feature
  • Breaking change
  • Documentation update

What

Adds a repeatable --kernel-arg flag to container run/container create for appending arbitrary boot arguments to the kernel command line.

container run --kernel /path/to/custom-bzImage \
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf \
...

Why

The runtime hardcodes lsm=lockdown,capability,landlock,yama,apparmor (and oops=panic) onto every kernel command line in RuntimeService.bootstrap. With a custom kernel there is no way to adjust this — e.g. to enable BPF LSM you need lsm=...,bpf, which is currently impossible. More generally there is no escape hatch for any boot-time kernel argument.

How

  • New --kernel-arg <arg> option (repeatable) on Flags.Management.
  • Utility.getKernel appends the user args onto kernel.commandLine.kernelArgs, which is persisted into the container bundle.
  • RuntimeService.bootstrap now applies its built-in defaults per-key, skipping any default whose key the user already supplied. Defaults are expressed as a small keyed table, so this also lets oops= be overridden and makes future defaults easy to add.

Default behavior is unchanged for anyone who does not pass --kernel-arg — the same oops=panic and lsm=... args are applied.

Testing

  • swift build clean.
  • container run --help renders the new flag.

@noah-thor

noah-thor commented Jul 22, 2026

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Can you please sign the commit: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits

Actual code change looks good to me

@arirubinstein
Allow custom kernel boot args via --kernel-arg
8fb74fe
Add a repeatable --kernel-arg flag to plumb arbitrary boot arguments
onto the kernel command line. User-supplied args are persisted on the
kernel in the bundle, and the runtime's built-in defaults (oops=panic,
lsm=...) are now applied per-key only when the user has not already
supplied that key. This lets custom kernels override the LSM stack,
e.g. to enable BPF LSM with:
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf
Signed-off-by: Ari Rubinstein <22369+arirubinstein@users.noreply.github.com>
@arirubinstein

arirubinstein commented Jul 22, 2026

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Signed and rebased

@github-actions

github-actionsBot commented Jul 23, 2026

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Code Coverage

TierLine Coverage
Unit23.38%
Integration66.49%
Combined75.44%

@crosbymichael
crosbymichael merged commit b229cec into apple:mainJul 27, 2026
3 checks passed
@stephenlclarkestephenlclarke mentioned this pull request Jul 27, 2026
Merged
@synkathairosynkathairo mentioned this pull request Jul 29, 2026
Merged
@github-actionsgithub-actionsBot mentioned this pull request Jul 31, 2026
Merged
6 tasks
andrewkomkov added a commit to getgantry/gantry that referenced this pull request Aug 1, 2026
@github-actions@andrewkomkov
feat(containers): boot containers from a custom kernel with custom bo…
e9d2df2
…ot args (#14)
apple/container **1.2.0** is out (previously tracked: `1.1.0`).
Upstream notes: https://github.com/apple/container/releases/tag/1.2.0 —
mirrored in `docs/upstream/apple-container-1.2.0.md`.
## Review checklist
- [ ] New or changed CLI flags Gantry should surface (`container
run/create/machine/build`)
- [ ] Changed `--format json` shapes the DockerKit apple transport
decodes
- [ ] Fixed upstream bugs Gantry currently works around
- [ ] `ContainerTooling.recommendedVersion` / feature gates need moving
to `1.2.0`
- [ ] MCP tools and App Intents that expose the affected commands
- [ ] README and CHANGELOG entries for whatever is adopted
Merging records the version as reviewed. Implement the adopted parts on
this branch, or merge as-is and open follow-ups.
---
<details><summary>Upstream release notes</summary>
## What's Changed
* Add TestCLISystemLogs and TestCLITermIO integration tests in new
integration test suite by @katiewasnothere in
apple/container#1879
* Restore reverted migrations, migrate last tests. by @jglogan in
apple/container#1880
* Removes obsolete CLITests directory. by @jglogan in
apple/container#1886
* Integration coverage xpc helpers by @noah-thor in
apple/container#1551
* Upgrade grpc-swift-nio-transport to 2.9.0 and remove HTTP2ConnectBuff…
by @adityabagchi24 in apple/container#1790
* Updates containerization to 0.36.0. by @jglogan in
apple/container#1912
* Use containerization version 0.37.0 by @adityaramani in
apple/container#1932
* Verify kernel archive integrity by @haoruilee in
apple/container#1703
* Add commit/issue alert to PR template. by @jglogan in
apple/container#1945
* Remove `--skip-build` from test Makefile target. by @jglogan in
apple/container#1951
* Restore `--skip-build`, enable `import testable` for release builds.
by @jglogan in apple/container#1955
* [package]: bump container-builder-shim to 0.13.0 by @saehejkang in
apple/container#1953
* Validate container ID from XPC requests by @katiewasnothere in
apple/container#1956
* Remove force unwraps on XPC error set/get by @katiewasnothere in
apple/container#1958
* Do not follow destination symlink when copying user configuration by
@katiewasnothere in apple/container#1957
* Fix machine ID length test. by @jglogan in
apple/container#1971
* Address flaky TestCLIKernelSetSerial suite. by @jglogan in
apple/container#1976
* [gitignore]: ignore vscode workspace files by @saehejkang in
apple/container#1966
* Update containerization dependency with new EXT4Unpacker func
definition by @katiewasnothere in
apple/container#1973
* Periodic dependency updates. by @jglogan in
apple/container#1981
* Use ordered journal mode for unpacked images. by @jglogan in
apple/container#1974
* Reword DNS container name resolution doc information by
@katiewasnothere in apple/container#1960
* ci: bump the github-actions group across 1 directory with 3 updates by
@dependabot[bot] in apple/container#1983
* Pass build config in when building protoc dependencies by
@katiewasnothere in apple/container#1972
* Container test fixture package by @katiewasnothere in
apple/container#1887
* Downgrade swift-collections to 1.5.1. by @jglogan in
apple/container#1984
* Use `enum` for warmup images. by @jglogan in
apple/container#1990
* Add missing dependencies to new ContainerTestSupport package by
@katiewasnothere in apple/container#1994
* Add OCI maskedPaths and readonlyPaths support to Container API. by
@jglogan in apple/container#1996
* Integration test - miscellaneous fixture and test refinements. by
@jglogan in apple/container#1993
* Use log instead of print for system start status messages by
@adityabagchi24 in apple/container#1889
* Fix BuilderStart race, parallelize `container build` tests. by
@jglogan in apple/container#2002
* Allow custom kernel boot args via --kernel-arg by @arirubinstein in
apple/container#1744
* fix: Increase XPC timeout for Machine API operations by @dev-kvt in
apple/container#2006
* Update containerization import to latest 0.40.0 by @katiewasnothere in
apple/container#2028
* Fix image env vars, build context checks, TCP/UDP port forward buffer,
and validate plugin name by @katiewasnothere in
apple/container#2027
* Update containerization import to 0.40.1 by @katiewasnothere in
apple/container#2038
## New Contributors
* @haoruilee made their first contribution in
apple/container#1703
* @arirubinstein made their first contribution in
apple/container#1744
* @dev-kvt made their first contribution in
apple/container#2006
**Full Changelog**:
apple/container@1.1.0...1.2.0
</details>
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Andrew <Andrew.Komkov@gmail.com>
This was referenced Aug 1, 2026
Merged
Merged
This was referenced Aug 4, 2026
Closed
Merged
henrywang added a commit to henrywang/Berthly that referenced this pull request Aug 4, 2026
@henrywang
feat: add --kernel-arg support to Run/Create sheet (#85)
d576300
## Summary
- container 1.2.0 added a repeatable `--kernel-arg` flag
(apple/container#1744) for appending raw boot arguments to the kernel
command line — e.g. adding `bpf` to the runtime's hardcoded LSM list to
enable BPF LSM, previously impossible. `Flags.Management` gained a
required `kernelArgs` parameter in the same release, confirming the API
is reachable from Berthly's native XPC calls, not just the CLI.
- `RunOptions` gained `kernelArgs: [String]`, threaded through
`LiveContainerService.runManagementFlags(for:)` into
`Flags.Management.kernelArgs`.
- New "Kernel boot arguments" `StringListEditor` on the Run/Create
sheet's Security tab, alongside the existing capAdd/capDrop editors it
mirrors.
- `PARITY.md`'s flag-surface list updated in the same commit.
- `Localizable.xcstrings` synced for the new field's string.
## Why
Part of the container 1.2.0 milestone (#78) — the SPM bump (#75)
surfaced this as a newly-required parameter, confirming the feature is
implementable at the API level Berthly actually calls.
Closes#78
## Test plan
- [x] `xcodebuild build` succeeds
- [x] `xcodebuild test -only-testing:BerthlyTests` — full suite passes,
including new coverage for `kernelArgs` in
`managementFlagsMapInteractiveVirtualizationCapsAndCidFile`
- [x] `swiftlint lint --strict` — 0 violations
- [x] Verified visually via Xcode's live preview renderer — confirmed
the new field renders on the Security tab using the working `capAdd`
pattern
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@crosbymichaelcrosbymichaelcrosbymichael approved these changes
@noah-thornoah-thornoah-thor approved these changes

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@arirubinstein@noah-thor@crosbymichael
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Allow custom kernel boot args via --kernel-arg by arirubinstein · Pull Request #1744 · apple/container · GitHub
Skip to content
Allow custom kernel boot args via --kernel-arg - #1744
Merged
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
Jul 27, 2026
Merged
Allow custom kernel boot args via --kernel-arg#1744
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
Conversation
@arirubinstein
@arirubinsteinarirubinstein
commented
Jun 17, 2026•

edited

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Contributor
Type of Change
  •  Bug fix
  •  New feature
  •  Breaking change
  •  Documentation update
What
Adds a repeatable --kernel-arg flag to container run/container create for appending arbitrary boot arguments to the kernel command line.
container run --kernel /path/to/custom-bzImage \
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf \
...

Why
The runtime hardcodes lsm=lockdown,capability,landlock,yama,apparmor (and oops=panic) onto every kernel command line in RuntimeService.bootstrap. With a custom kernel there is no way to adjust this — e.g. to enable BPF LSM you need lsm=...,bpf, which is currently impossible. More generally there is no escape hatch for any boot-time kernel argument.
How
  • New --kernel-arg <arg> option (repeatable) on Flags.Management.
  • Utility.getKernel appends the user args onto kernel.commandLine.kernelArgs, which is persisted into the container bundle.
  • RuntimeService.bootstrap now applies its built-in defaults per-key, skipping any default whose key the user already supplied. Defaults are expressed as a small keyed table, so this also lets oops= be overridden and makes future defaults easy to add.
Default behavior is unchanged for anyone who does not pass --kernel-arg — the same oops=panic and lsm=... args are applied.
Testing
  • swift build clean.
  • container run --help renders the new flag.
@noah-thor
noah-thor
commented
Jul 22, 2026

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Can you please sign the commit: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits
Actual code change looks good to me
@arirubinstein
Allow custom kernel boot args via --kernel-arg
8fb74fe
Add a repeatable --kernel-arg flag to plumb arbitrary boot arguments
onto the kernel command line. User-supplied args are persisted on the
kernel in the bundle, and the runtime's built-in defaults (oops=panic,
lsm=...) are now applied per-key only when the user has not already
supplied that key. This lets custom kernels override the LSM stack,
e.g. to enable BPF LSM with:
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf
Signed-off-by: Ari Rubinstein <22369+arirubinstein@users.noreply.github.com>
@arirubinstein
arirubinstein
commented
Jul 22, 2026

Copy link


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ContributorAuthor
Signed and rebased
@github-actions
github-actionsBot
commented
Jul 23, 2026

Copy link


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Code Coverage
TierLine Coverage
Unit23.38%
Integration66.49%
Combined75.44%
@crosbymichael
crosbymichael
merged commit b229cec
into
apple:mainJul 27, 2026

3 checks passed

@stephenlclarkestephenlclarke
mentioned this pull request
Jul 27, 2026
 Merged

@synkathairosynkathairo
mentioned this pull request
Jul 29, 2026
 Merged

@github-actionsgithub-actionsBot
mentioned this pull request
Jul 31, 2026
 Merged

6 tasks
andrewkomkov added a commit
to getgantry/gantry
that referenced
this pull request
Aug 1, 2026
@github-actions@andrewkomkov
feat(containers): boot containers from a custom kernel with custom bo…
e9d2df2
…ot args (#14)
apple/container **1.2.0** is out (previously tracked: `1.1.0`).
Upstream notes: https://github.com/apple/container/releases/tag/1.2.0 —
mirrored in `docs/upstream/apple-container-1.2.0.md`.
## Review checklist
- [ ] New or changed CLI flags Gantry should surface (`container
run/create/machine/build`)
- [ ] Changed `--format json` shapes the DockerKit apple transport
decodes
- [ ] Fixed upstream bugs Gantry currently works around
- [ ] `ContainerTooling.recommendedVersion` / feature gates need moving
to `1.2.0`
- [ ] MCP tools and App Intents that expose the affected commands
- [ ] README and CHANGELOG entries for whatever is adopted
Merging records the version as reviewed. Implement the adopted parts on
this branch, or merge as-is and open follow-ups.
---
<details><summary>Upstream release notes</summary>
## What's Changed
* Add TestCLISystemLogs and TestCLITermIO integration tests in new
integration test suite by @katiewasnothere in
apple/container#1879
* Restore reverted migrations, migrate last tests. by @jglogan in
apple/container#1880
* Removes obsolete CLITests directory. by @jglogan in
apple/container#1886
* Integration coverage xpc helpers by @noah-thor in
apple/container#1551
* Upgrade grpc-swift-nio-transport to 2.9.0 and remove HTTP2ConnectBuff…
by @adityabagchi24 in apple/container#1790
* Updates containerization to 0.36.0. by @jglogan in
apple/container#1912
* Use containerization version 0.37.0 by @adityaramani in
apple/container#1932
* Verify kernel archive integrity by @haoruilee in
apple/container#1703
* Add commit/issue alert to PR template. by @jglogan in
apple/container#1945
* Remove `--skip-build` from test Makefile target. by @jglogan in
apple/container#1951
* Restore `--skip-build`, enable `import testable` for release builds.
by @jglogan in apple/container#1955
* [package]: bump container-builder-shim to 0.13.0 by @saehejkang in
apple/container#1953
* Validate container ID from XPC requests by @katiewasnothere in
apple/container#1956
* Remove force unwraps on XPC error set/get by @katiewasnothere in
apple/container#1958
* Do not follow destination symlink when copying user configuration by
@katiewasnothere in apple/container#1957
* Fix machine ID length test. by @jglogan in
apple/container#1971
* Address flaky TestCLIKernelSetSerial suite. by @jglogan in
apple/container#1976
* [gitignore]: ignore vscode workspace files by @saehejkang in
apple/container#1966
* Update containerization dependency with new EXT4Unpacker func
definition by @katiewasnothere in
apple/container#1973
* Periodic dependency updates. by @jglogan in
apple/container#1981
* Use ordered journal mode for unpacked images. by @jglogan in
apple/container#1974
* Reword DNS container name resolution doc information by
@katiewasnothere in apple/container#1960
* ci: bump the github-actions group across 1 directory with 3 updates by
@dependabot[bot] in apple/container#1983
* Pass build config in when building protoc dependencies by
@katiewasnothere in apple/container#1972
* Container test fixture package by @katiewasnothere in
apple/container#1887
* Downgrade swift-collections to 1.5.1. by @jglogan in
apple/container#1984
* Use `enum` for warmup images. by @jglogan in
apple/container#1990
* Add missing dependencies to new ContainerTestSupport package by
@katiewasnothere in apple/container#1994
* Add OCI maskedPaths and readonlyPaths support to Container API. by
@jglogan in apple/container#1996
* Integration test - miscellaneous fixture and test refinements. by
@jglogan in apple/container#1993
* Use log instead of print for system start status messages by
@adityabagchi24 in apple/container#1889
* Fix BuilderStart race, parallelize `container build` tests. by
@jglogan in apple/container#2002
* Allow custom kernel boot args via --kernel-arg by @arirubinstein in
apple/container#1744
* fix: Increase XPC timeout for Machine API operations by @dev-kvt in
apple/container#2006
* Update containerization import to latest 0.40.0 by @katiewasnothere in
apple/container#2028
* Fix image env vars, build context checks, TCP/UDP port forward buffer,
and validate plugin name by @katiewasnothere in
apple/container#2027
* Update containerization import to 0.40.1 by @katiewasnothere in
apple/container#2038
## New Contributors
* @haoruilee made their first contribution in
apple/container#1703
* @arirubinstein made their first contribution in
apple/container#1744
* @dev-kvt made their first contribution in
apple/container#2006
**Full Changelog**:
apple/container@1.1.0...1.2.0
</details>
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Andrew <Andrew.Komkov@gmail.com>

This was referenced Aug 1, 2026
 Merged

 Merged


This was referenced Aug 4, 2026

Closed

 Merged

henrywang added a commit
to henrywang/Berthly
that referenced
this pull request
Aug 4, 2026
@henrywang
feat: add --kernel-arg support to Run/Create sheet (#85)
d576300
## Summary
- container 1.2.0 added a repeatable `--kernel-arg` flag
(apple/container#1744) for appending raw boot arguments to the kernel
command line — e.g. adding `bpf` to the runtime's hardcoded LSM list to
enable BPF LSM, previously impossible. `Flags.Management` gained a
required `kernelArgs` parameter in the same release, confirming the API
is reachable from Berthly's native XPC calls, not just the CLI.
- `RunOptions` gained `kernelArgs: [String]`, threaded through
`LiveContainerService.runManagementFlags(for:)` into
`Flags.Management.kernelArgs`.
- New "Kernel boot arguments" `StringListEditor` on the Run/Create
sheet's Security tab, alongside the existing capAdd/capDrop editors it
mirrors.
- `PARITY.md`'s flag-surface list updated in the same commit.
- `Localizable.xcstrings` synced for the new field's string.
## Why
Part of the container 1.2.0 milestone (#78) — the SPM bump (#75)
surfaced this as a newly-required parameter, confirming the feature is
implementable at the API level Berthly actually calls.
Closes#78
## Test plan
- [x] `xcodebuild build` succeeds
- [x] `xcodebuild test -only-testing:BerthlyTests` — full suite passes,
including new coverage for `kernelArgs` in
`managementFlagsMapInteractiveVirtualizationCapsAndCidFile`
- [x] `swiftlint lint --strict` — 0 violations
- [x] Verified visually via Xcode's live preview renderer — confirmed
the new field renders on the Security tab using the working `capAdd`
pattern
Sign up for freeto join this conversation on GitHub.
Already have an account?
Sign in to comment

Reviewers

@crosbymichaelcrosbymichaelcrosbymichael approved these changes
@noah-thornoah-thornoah-thor approved these changes

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3 participants

@arirubinstein@noah-thor@crosbymichael

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Allow custom kernel boot args via --kernel-arg by arirubinstein · Pull Request #1744 · apple/container · GitHub
Skip to content
Allow custom kernel boot args via --kernel-arg - #1744
Merged
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
Jul 27, 2026
Merged
Allow custom kernel boot args via --kernel-arg#1744
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
Conversation
@arirubinstein
@arirubinsteinarirubinstein
commented
Jun 17, 2026•

edited

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Contributor
Type of Change
  •  Bug fix
  •  New feature
  •  Breaking change
  •  Documentation update
What
Adds a repeatable --kernel-arg flag to container run/container create for appending arbitrary boot arguments to the kernel command line.
container run --kernel /path/to/custom-bzImage \
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf \
...

Why
The runtime hardcodes lsm=lockdown,capability,landlock,yama,apparmor (and oops=panic) onto every kernel command line in RuntimeService.bootstrap. With a custom kernel there is no way to adjust this — e.g. to enable BPF LSM you need lsm=...,bpf, which is currently impossible. More generally there is no escape hatch for any boot-time kernel argument.
How
  • New --kernel-arg <arg> option (repeatable) on Flags.Management.
  • Utility.getKernel appends the user args onto kernel.commandLine.kernelArgs, which is persisted into the container bundle.
  • RuntimeService.bootstrap now applies its built-in defaults per-key, skipping any default whose key the user already supplied. Defaults are expressed as a small keyed table, so this also lets oops= be overridden and makes future defaults easy to add.
Default behavior is unchanged for anyone who does not pass --kernel-arg — the same oops=panic and lsm=... args are applied.
Testing
  • swift build clean.
  • container run --help renders the new flag.
@noah-thor
noah-thor
commented
Jul 22, 2026

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Can you please sign the commit: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits
Actual code change looks good to me
@arirubinstein
Allow custom kernel boot args via --kernel-arg
8fb74fe
Add a repeatable --kernel-arg flag to plumb arbitrary boot arguments
onto the kernel command line. User-supplied args are persisted on the
kernel in the bundle, and the runtime's built-in defaults (oops=panic,
lsm=...) are now applied per-key only when the user has not already
supplied that key. This lets custom kernels override the LSM stack,
e.g. to enable BPF LSM with:
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf
Signed-off-by: Ari Rubinstein <22369+arirubinstein@users.noreply.github.com>
@arirubinstein
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Jul 22, 2026

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Code Coverage
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Unit23.38%
Integration66.49%
Combined75.44%
@crosbymichael
crosbymichael
merged commit b229cec
into
apple:mainJul 27, 2026

3 checks passed

@stephenlclarkestephenlclarke
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Jul 27, 2026
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6 tasks
andrewkomkov added a commit
to getgantry/gantry
that referenced
this pull request
Aug 1, 2026
@github-actions@andrewkomkov
feat(containers): boot containers from a custom kernel with custom bo…
e9d2df2
…ot args (#14)
apple/container **1.2.0** is out (previously tracked: `1.1.0`).
Upstream notes: https://github.com/apple/container/releases/tag/1.2.0 —
mirrored in `docs/upstream/apple-container-1.2.0.md`.
## Review checklist
- [ ] New or changed CLI flags Gantry should surface (`container
run/create/machine/build`)
- [ ] Changed `--format json` shapes the DockerKit apple transport
decodes
- [ ] Fixed upstream bugs Gantry currently works around
- [ ] `ContainerTooling.recommendedVersion` / feature gates need moving
to `1.2.0`
- [ ] MCP tools and App Intents that expose the affected commands
- [ ] README and CHANGELOG entries for whatever is adopted
Merging records the version as reviewed. Implement the adopted parts on
this branch, or merge as-is and open follow-ups.
---
<details><summary>Upstream release notes</summary>
## What's Changed
* Add TestCLISystemLogs and TestCLITermIO integration tests in new
integration test suite by @katiewasnothere in
apple/container#1879
* Restore reverted migrations, migrate last tests. by @jglogan in
apple/container#1880
* Removes obsolete CLITests directory. by @jglogan in
apple/container#1886
* Integration coverage xpc helpers by @noah-thor in
apple/container#1551
* Upgrade grpc-swift-nio-transport to 2.9.0 and remove HTTP2ConnectBuff…
by @adityabagchi24 in apple/container#1790
* Updates containerization to 0.36.0. by @jglogan in
apple/container#1912
* Use containerization version 0.37.0 by @adityaramani in
apple/container#1932
* Verify kernel archive integrity by @haoruilee in
apple/container#1703
* Add commit/issue alert to PR template. by @jglogan in
apple/container#1945
* Remove `--skip-build` from test Makefile target. by @jglogan in
apple/container#1951
* Restore `--skip-build`, enable `import testable` for release builds.
by @jglogan in apple/container#1955
* [package]: bump container-builder-shim to 0.13.0 by @saehejkang in
apple/container#1953
* Validate container ID from XPC requests by @katiewasnothere in
apple/container#1956
* Remove force unwraps on XPC error set/get by @katiewasnothere in
apple/container#1958
* Do not follow destination symlink when copying user configuration by
@katiewasnothere in apple/container#1957
* Fix machine ID length test. by @jglogan in
apple/container#1971
* Address flaky TestCLIKernelSetSerial suite. by @jglogan in
apple/container#1976
* [gitignore]: ignore vscode workspace files by @saehejkang in
apple/container#1966
* Update containerization dependency with new EXT4Unpacker func
definition by @katiewasnothere in
apple/container#1973
* Periodic dependency updates. by @jglogan in
apple/container#1981
* Use ordered journal mode for unpacked images. by @jglogan in
apple/container#1974
* Reword DNS container name resolution doc information by
@katiewasnothere in apple/container#1960
* ci: bump the github-actions group across 1 directory with 3 updates by
@dependabot[bot] in apple/container#1983
* Pass build config in when building protoc dependencies by
@katiewasnothere in apple/container#1972
* Container test fixture package by @katiewasnothere in
apple/container#1887
* Downgrade swift-collections to 1.5.1. by @jglogan in
apple/container#1984
* Use `enum` for warmup images. by @jglogan in
apple/container#1990
* Add missing dependencies to new ContainerTestSupport package by
@katiewasnothere in apple/container#1994
* Add OCI maskedPaths and readonlyPaths support to Container API. by
@jglogan in apple/container#1996
* Integration test - miscellaneous fixture and test refinements. by
@jglogan in apple/container#1993
* Use log instead of print for system start status messages by
@adityabagchi24 in apple/container#1889
* Fix BuilderStart race, parallelize `container build` tests. by
@jglogan in apple/container#2002
* Allow custom kernel boot args via --kernel-arg by @arirubinstein in
apple/container#1744
* fix: Increase XPC timeout for Machine API operations by @dev-kvt in
apple/container#2006
* Update containerization import to latest 0.40.0 by @katiewasnothere in
apple/container#2028
* Fix image env vars, build context checks, TCP/UDP port forward buffer,
and validate plugin name by @katiewasnothere in
apple/container#2027
* Update containerization import to 0.40.1 by @katiewasnothere in
apple/container#2038
## New Contributors
* @haoruilee made their first contribution in
apple/container#1703
* @arirubinstein made their first contribution in
apple/container#1744
* @dev-kvt made their first contribution in
apple/container#2006
**Full Changelog**:
apple/container@1.1.0...1.2.0
</details>
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Andrew <Andrew.Komkov@gmail.com>

This was referenced Aug 1, 2026
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to henrywang/Berthly
that referenced
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Aug 4, 2026
@henrywang
feat: add --kernel-arg support to Run/Create sheet (#85)
d576300
## Summary
- container 1.2.0 added a repeatable `--kernel-arg` flag
(apple/container#1744) for appending raw boot arguments to the kernel
command line — e.g. adding `bpf` to the runtime's hardcoded LSM list to
enable BPF LSM, previously impossible. `Flags.Management` gained a
required `kernelArgs` parameter in the same release, confirming the API
is reachable from Berthly's native XPC calls, not just the CLI.
- `RunOptions` gained `kernelArgs: [String]`, threaded through
`LiveContainerService.runManagementFlags(for:)` into
`Flags.Management.kernelArgs`.
- New "Kernel boot arguments" `StringListEditor` on the Run/Create
sheet's Security tab, alongside the existing capAdd/capDrop editors it
mirrors.
- `PARITY.md`'s flag-surface list updated in the same commit.
- `Localizable.xcstrings` synced for the new field's string.
## Why
Part of the container 1.2.0 milestone (#78) — the SPM bump (#75)
surfaced this as a newly-required parameter, confirming the feature is
implementable at the API level Berthly actually calls.
Closes#78
## Test plan
- [x] `xcodebuild build` succeeds
- [x] `xcodebuild test -only-testing:BerthlyTests` — full suite passes,
including new coverage for `kernelArgs` in
`managementFlagsMapInteractiveVirtualizationCapsAndCidFile`
- [x] `swiftlint lint --strict` — 0 violations
- [x] Verified visually via Xcode's live preview renderer — confirmed
the new field renders on the Security tab using the working `capAdd`
pattern
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Allow custom kernel boot args via --kernel-arg by arirubinstein · Pull Request #1744 · apple/container · GitHub
Skip to content
Allow custom kernel boot args via --kernel-arg - #1744
Merged
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
Jul 27, 2026
Merged
Allow custom kernel boot args via --kernel-arg#1744
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
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@arirubinstein
@arirubinsteinarirubinstein
commented
Jun 17, 2026•

edited

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Contributor
Type of Change
  •  Bug fix
  •  New feature
  •  Breaking change
  •  Documentation update
What
Adds a repeatable --kernel-arg flag to container run/container create for appending arbitrary boot arguments to the kernel command line.
container run --kernel /path/to/custom-bzImage \
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf \
...

Why
The runtime hardcodes lsm=lockdown,capability,landlock,yama,apparmor (and oops=panic) onto every kernel command line in RuntimeService.bootstrap. With a custom kernel there is no way to adjust this — e.g. to enable BPF LSM you need lsm=...,bpf, which is currently impossible. More generally there is no escape hatch for any boot-time kernel argument.
How
  • New --kernel-arg <arg> option (repeatable) on Flags.Management.
  • Utility.getKernel appends the user args onto kernel.commandLine.kernelArgs, which is persisted into the container bundle.
  • RuntimeService.bootstrap now applies its built-in defaults per-key, skipping any default whose key the user already supplied. Defaults are expressed as a small keyed table, so this also lets oops= be overridden and makes future defaults easy to add.
Default behavior is unchanged for anyone who does not pass --kernel-arg — the same oops=panic and lsm=... args are applied.
Testing
  • swift build clean.
  • container run --help renders the new flag.
@noah-thor
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Jul 22, 2026

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Can you please sign the commit: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits
Actual code change looks good to me
@arirubinstein
Allow custom kernel boot args via --kernel-arg
8fb74fe
Add a repeatable --kernel-arg flag to plumb arbitrary boot arguments
onto the kernel command line. User-supplied args are persisted on the
kernel in the bundle, and the runtime's built-in defaults (oops=panic,
lsm=...) are now applied per-key only when the user has not already
supplied that key. This lets custom kernels override the LSM stack,
e.g. to enable BPF LSM with:
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf
Signed-off-by: Ari Rubinstein <22369+arirubinstein@users.noreply.github.com>
@arirubinstein
arirubinstein
commented
Jul 22, 2026

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ContributorAuthor
Signed and rebased
@github-actions
github-actionsBot
commented
Jul 23, 2026

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Code Coverage
TierLine Coverage
Unit23.38%
Integration66.49%
Combined75.44%
@crosbymichael
crosbymichael
merged commit b229cec
into
apple:mainJul 27, 2026

3 checks passed

@stephenlclarkestephenlclarke
mentioned this pull request
Jul 27, 2026
 Merged

@synkathairosynkathairo
mentioned this pull request
Jul 29, 2026
 Merged

@github-actionsgithub-actionsBot
mentioned this pull request
Jul 31, 2026
 Merged

6 tasks
andrewkomkov added a commit
to getgantry/gantry
that referenced
this pull request
Aug 1, 2026
@github-actions@andrewkomkov
feat(containers): boot containers from a custom kernel with custom bo…
e9d2df2
…ot args (#14)
apple/container **1.2.0** is out (previously tracked: `1.1.0`).
Upstream notes: https://github.com/apple/container/releases/tag/1.2.0 —
mirrored in `docs/upstream/apple-container-1.2.0.md`.
## Review checklist
- [ ] New or changed CLI flags Gantry should surface (`container
run/create/machine/build`)
- [ ] Changed `--format json` shapes the DockerKit apple transport
decodes
- [ ] Fixed upstream bugs Gantry currently works around
- [ ] `ContainerTooling.recommendedVersion` / feature gates need moving
to `1.2.0`
- [ ] MCP tools and App Intents that expose the affected commands
- [ ] README and CHANGELOG entries for whatever is adopted
Merging records the version as reviewed. Implement the adopted parts on
this branch, or merge as-is and open follow-ups.
---
<details><summary>Upstream release notes</summary>
## What's Changed
* Add TestCLISystemLogs and TestCLITermIO integration tests in new
integration test suite by @katiewasnothere in
apple/container#1879
* Restore reverted migrations, migrate last tests. by @jglogan in
apple/container#1880
* Removes obsolete CLITests directory. by @jglogan in
apple/container#1886
* Integration coverage xpc helpers by @noah-thor in
apple/container#1551
* Upgrade grpc-swift-nio-transport to 2.9.0 and remove HTTP2ConnectBuff…
by @adityabagchi24 in apple/container#1790
* Updates containerization to 0.36.0. by @jglogan in
apple/container#1912
* Use containerization version 0.37.0 by @adityaramani in
apple/container#1932
* Verify kernel archive integrity by @haoruilee in
apple/container#1703
* Add commit/issue alert to PR template. by @jglogan in
apple/container#1945
* Remove `--skip-build` from test Makefile target. by @jglogan in
apple/container#1951
* Restore `--skip-build`, enable `import testable` for release builds.
by @jglogan in apple/container#1955
* [package]: bump container-builder-shim to 0.13.0 by @saehejkang in
apple/container#1953
* Validate container ID from XPC requests by @katiewasnothere in
apple/container#1956
* Remove force unwraps on XPC error set/get by @katiewasnothere in
apple/container#1958
* Do not follow destination symlink when copying user configuration by
@katiewasnothere in apple/container#1957
* Fix machine ID length test. by @jglogan in
apple/container#1971
* Address flaky TestCLIKernelSetSerial suite. by @jglogan in
apple/container#1976
* [gitignore]: ignore vscode workspace files by @saehejkang in
apple/container#1966
* Update containerization dependency with new EXT4Unpacker func
definition by @katiewasnothere in
apple/container#1973
* Periodic dependency updates. by @jglogan in
apple/container#1981
* Use ordered journal mode for unpacked images. by @jglogan in
apple/container#1974
* Reword DNS container name resolution doc information by
@katiewasnothere in apple/container#1960
* ci: bump the github-actions group across 1 directory with 3 updates by
@dependabot[bot] in apple/container#1983
* Pass build config in when building protoc dependencies by
@katiewasnothere in apple/container#1972
* Container test fixture package by @katiewasnothere in
apple/container#1887
* Downgrade swift-collections to 1.5.1. by @jglogan in
apple/container#1984
* Use `enum` for warmup images. by @jglogan in
apple/container#1990
* Add missing dependencies to new ContainerTestSupport package by
@katiewasnothere in apple/container#1994
* Add OCI maskedPaths and readonlyPaths support to Container API. by
@jglogan in apple/container#1996
* Integration test - miscellaneous fixture and test refinements. by
@jglogan in apple/container#1993
* Use log instead of print for system start status messages by
@adityabagchi24 in apple/container#1889
* Fix BuilderStart race, parallelize `container build` tests. by
@jglogan in apple/container#2002
* Allow custom kernel boot args via --kernel-arg by @arirubinstein in
apple/container#1744
* fix: Increase XPC timeout for Machine API operations by @dev-kvt in
apple/container#2006
* Update containerization import to latest 0.40.0 by @katiewasnothere in
apple/container#2028
* Fix image env vars, build context checks, TCP/UDP port forward buffer,
and validate plugin name by @katiewasnothere in
apple/container#2027
* Update containerization import to 0.40.1 by @katiewasnothere in
apple/container#2038
## New Contributors
* @haoruilee made their first contribution in
apple/container#1703
* @arirubinstein made their first contribution in
apple/container#1744
* @dev-kvt made their first contribution in
apple/container#2006
**Full Changelog**:
apple/container@1.1.0...1.2.0
</details>
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Andrew <Andrew.Komkov@gmail.com>

This was referenced Aug 1, 2026
 Merged

 Merged


This was referenced Aug 4, 2026

Closed

 Merged

henrywang added a commit
to henrywang/Berthly
that referenced
this pull request
Aug 4, 2026
@henrywang
feat: add --kernel-arg support to Run/Create sheet (#85)
d576300
## Summary
- container 1.2.0 added a repeatable `--kernel-arg` flag
(apple/container#1744) for appending raw boot arguments to the kernel
command line — e.g. adding `bpf` to the runtime's hardcoded LSM list to
enable BPF LSM, previously impossible. `Flags.Management` gained a
required `kernelArgs` parameter in the same release, confirming the API
is reachable from Berthly's native XPC calls, not just the CLI.
- `RunOptions` gained `kernelArgs: [String]`, threaded through
`LiveContainerService.runManagementFlags(for:)` into
`Flags.Management.kernelArgs`.
- New "Kernel boot arguments" `StringListEditor` on the Run/Create
sheet's Security tab, alongside the existing capAdd/capDrop editors it
mirrors.
- `PARITY.md`'s flag-surface list updated in the same commit.
- `Localizable.xcstrings` synced for the new field's string.
## Why
Part of the container 1.2.0 milestone (#78) — the SPM bump (#75)
surfaced this as a newly-required parameter, confirming the feature is
implementable at the API level Berthly actually calls.
Closes#78
## Test plan
- [x] `xcodebuild build` succeeds
- [x] `xcodebuild test -only-testing:BerthlyTests` — full suite passes,
including new coverage for `kernelArgs` in
`managementFlagsMapInteractiveVirtualizationCapsAndCidFile`
- [x] `swiftlint lint --strict` — 0 violations
- [x] Verified visually via Xcode's live preview renderer — confirmed
the new field renders on the Security tab using the working `capAdd`
pattern
Sign up for freeto join this conversation on GitHub.
Already have an account?
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Reviewers

@crosbymichaelcrosbymichaelcrosbymichael approved these changes
@noah-thornoah-thornoah-thor approved these changes

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@arirubinstein@noah-thor@crosbymichael

, 'i');
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// Strip utm_, fbclid, gclid, etc. from all links on page
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})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
Allow custom kernel boot args via --kernel-arg by arirubinstein · Pull Request #1744 · apple/container · GitHub
Skip to content
Allow custom kernel boot args via --kernel-arg - #1744
Merged
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
Jul 27, 2026
Merged
Allow custom kernel boot args via --kernel-arg#1744
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
Conversation
@arirubinstein
@arirubinsteinarirubinstein
commented
Jun 17, 2026•

edited

Loading

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Contributor
Type of Change
  •  Bug fix
  •  New feature
  •  Breaking change
  •  Documentation update
What
Adds a repeatable --kernel-arg flag to container run/container create for appending arbitrary boot arguments to the kernel command line.
container run --kernel /path/to/custom-bzImage \
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf \
...

Why
The runtime hardcodes lsm=lockdown,capability,landlock,yama,apparmor (and oops=panic) onto every kernel command line in RuntimeService.bootstrap. With a custom kernel there is no way to adjust this — e.g. to enable BPF LSM you need lsm=...,bpf, which is currently impossible. More generally there is no escape hatch for any boot-time kernel argument.
How
  • New --kernel-arg <arg> option (repeatable) on Flags.Management.
  • Utility.getKernel appends the user args onto kernel.commandLine.kernelArgs, which is persisted into the container bundle.
  • RuntimeService.bootstrap now applies its built-in defaults per-key, skipping any default whose key the user already supplied. Defaults are expressed as a small keyed table, so this also lets oops= be overridden and makes future defaults easy to add.
Default behavior is unchanged for anyone who does not pass --kernel-arg — the same oops=panic and lsm=... args are applied.
Testing
  • swift build clean.
  • container run --help renders the new flag.
@noah-thor
noah-thor
commented
Jul 22, 2026

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Can you please sign the commit: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits
Actual code change looks good to me
@arirubinstein
Allow custom kernel boot args via --kernel-arg
8fb74fe
Add a repeatable --kernel-arg flag to plumb arbitrary boot arguments
onto the kernel command line. User-supplied args are persisted on the
kernel in the bundle, and the runtime's built-in defaults (oops=panic,
lsm=...) are now applied per-key only when the user has not already
supplied that key. This lets custom kernels override the LSM stack,
e.g. to enable BPF LSM with:
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf
Signed-off-by: Ari Rubinstein <22369+arirubinstein@users.noreply.github.com>
@arirubinstein
arirubinstein
commented
Jul 22, 2026

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Signed and rebased
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commented
Jul 23, 2026

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andrewkomkov added a commit
to getgantry/gantry
that referenced
this pull request
Aug 1, 2026
@github-actions@andrewkomkov
feat(containers): boot containers from a custom kernel with custom bo…
e9d2df2
…ot args (#14)
apple/container **1.2.0** is out (previously tracked: `1.1.0`).
Upstream notes: https://github.com/apple/container/releases/tag/1.2.0 —
mirrored in `docs/upstream/apple-container-1.2.0.md`.
## Review checklist
- [ ] New or changed CLI flags Gantry should surface (`container
run/create/machine/build`)
- [ ] Changed `--format json` shapes the DockerKit apple transport
decodes
- [ ] Fixed upstream bugs Gantry currently works around
- [ ] `ContainerTooling.recommendedVersion` / feature gates need moving
to `1.2.0`
- [ ] MCP tools and App Intents that expose the affected commands
- [ ] README and CHANGELOG entries for whatever is adopted
Merging records the version as reviewed. Implement the adopted parts on
this branch, or merge as-is and open follow-ups.
---
<details><summary>Upstream release notes</summary>
## What's Changed
* Add TestCLISystemLogs and TestCLITermIO integration tests in new
integration test suite by @katiewasnothere in
apple/container#1879
* Restore reverted migrations, migrate last tests. by @jglogan in
apple/container#1880
* Removes obsolete CLITests directory. by @jglogan in
apple/container#1886
* Integration coverage xpc helpers by @noah-thor in
apple/container#1551
* Upgrade grpc-swift-nio-transport to 2.9.0 and remove HTTP2ConnectBuff…
by @adityabagchi24 in apple/container#1790
* Updates containerization to 0.36.0. by @jglogan in
apple/container#1912
* Use containerization version 0.37.0 by @adityaramani in
apple/container#1932
* Verify kernel archive integrity by @haoruilee in
apple/container#1703
* Add commit/issue alert to PR template. by @jglogan in
apple/container#1945
* Remove `--skip-build` from test Makefile target. by @jglogan in
apple/container#1951
* Restore `--skip-build`, enable `import testable` for release builds.
by @jglogan in apple/container#1955
* [package]: bump container-builder-shim to 0.13.0 by @saehejkang in
apple/container#1953
* Validate container ID from XPC requests by @katiewasnothere in
apple/container#1956
* Remove force unwraps on XPC error set/get by @katiewasnothere in
apple/container#1958
* Do not follow destination symlink when copying user configuration by
@katiewasnothere in apple/container#1957
* Fix machine ID length test. by @jglogan in
apple/container#1971
* Address flaky TestCLIKernelSetSerial suite. by @jglogan in
apple/container#1976
* [gitignore]: ignore vscode workspace files by @saehejkang in
apple/container#1966
* Update containerization dependency with new EXT4Unpacker func
definition by @katiewasnothere in
apple/container#1973
* Periodic dependency updates. by @jglogan in
apple/container#1981
* Use ordered journal mode for unpacked images. by @jglogan in
apple/container#1974
* Reword DNS container name resolution doc information by
@katiewasnothere in apple/container#1960
* ci: bump the github-actions group across 1 directory with 3 updates by
@dependabot[bot] in apple/container#1983
* Pass build config in when building protoc dependencies by
@katiewasnothere in apple/container#1972
* Container test fixture package by @katiewasnothere in
apple/container#1887
* Downgrade swift-collections to 1.5.1. by @jglogan in
apple/container#1984
* Use `enum` for warmup images. by @jglogan in
apple/container#1990
* Add missing dependencies to new ContainerTestSupport package by
@katiewasnothere in apple/container#1994
* Add OCI maskedPaths and readonlyPaths support to Container API. by
@jglogan in apple/container#1996
* Integration test - miscellaneous fixture and test refinements. by
@jglogan in apple/container#1993
* Use log instead of print for system start status messages by
@adityabagchi24 in apple/container#1889
* Fix BuilderStart race, parallelize `container build` tests. by
@jglogan in apple/container#2002
* Allow custom kernel boot args via --kernel-arg by @arirubinstein in
apple/container#1744
* fix: Increase XPC timeout for Machine API operations by @dev-kvt in
apple/container#2006
* Update containerization import to latest 0.40.0 by @katiewasnothere in
apple/container#2028
* Fix image env vars, build context checks, TCP/UDP port forward buffer,
and validate plugin name by @katiewasnothere in
apple/container#2027
* Update containerization import to 0.40.1 by @katiewasnothere in
apple/container#2038
## New Contributors
* @haoruilee made their first contribution in
apple/container#1703
* @arirubinstein made their first contribution in
apple/container#1744
* @dev-kvt made their first contribution in
apple/container#2006
**Full Changelog**:
apple/container@1.1.0...1.2.0
</details>
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Andrew <Andrew.Komkov@gmail.com>

This was referenced Aug 1, 2026
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This was referenced Aug 4, 2026

Closed

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henrywang added a commit
to henrywang/Berthly
that referenced
this pull request
Aug 4, 2026
@henrywang
feat: add --kernel-arg support to Run/Create sheet (#85)
d576300
## Summary
- container 1.2.0 added a repeatable `--kernel-arg` flag
(apple/container#1744) for appending raw boot arguments to the kernel
command line — e.g. adding `bpf` to the runtime's hardcoded LSM list to
enable BPF LSM, previously impossible. `Flags.Management` gained a
required `kernelArgs` parameter in the same release, confirming the API
is reachable from Berthly's native XPC calls, not just the CLI.
- `RunOptions` gained `kernelArgs: [String]`, threaded through
`LiveContainerService.runManagementFlags(for:)` into
`Flags.Management.kernelArgs`.
- New "Kernel boot arguments" `StringListEditor` on the Run/Create
sheet's Security tab, alongside the existing capAdd/capDrop editors it
mirrors.
- `PARITY.md`'s flag-surface list updated in the same commit.
- `Localizable.xcstrings` synced for the new field's string.
## Why
Part of the container 1.2.0 milestone (#78) — the SPM bump (#75)
surfaced this as a newly-required parameter, confirming the feature is
implementable at the API level Berthly actually calls.
Closes#78
## Test plan
- [x] `xcodebuild build` succeeds
- [x] `xcodebuild test -only-testing:BerthlyTests` — full suite passes,
including new coverage for `kernelArgs` in
`managementFlagsMapInteractiveVirtualizationCapsAndCidFile`
- [x] `swiftlint lint --strict` — 0 violations
- [x] Verified visually via Xcode's live preview renderer — confirmed
the new field renders on the Security tab using the working `capAdd`
pattern
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@arirubinstein@noah-thor@crosbymichael

, 'i');
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Allow custom kernel boot args via --kernel-arg by arirubinstein · Pull Request #1744 · apple/container · GitHub
Skip to content
Allow custom kernel boot args via --kernel-arg - #1744
Merged
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
Jul 27, 2026
Merged
Allow custom kernel boot args via --kernel-arg#1744
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
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@arirubinstein
@arirubinsteinarirubinstein
commented
Jun 17, 2026•

edited

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Type of Change
  •  Bug fix
  •  New feature
  •  Breaking change
  •  Documentation update
What
Adds a repeatable --kernel-arg flag to container run/container create for appending arbitrary boot arguments to the kernel command line.
container run --kernel /path/to/custom-bzImage \
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf \
...

Why
The runtime hardcodes lsm=lockdown,capability,landlock,yama,apparmor (and oops=panic) onto every kernel command line in RuntimeService.bootstrap. With a custom kernel there is no way to adjust this — e.g. to enable BPF LSM you need lsm=...,bpf, which is currently impossible. More generally there is no escape hatch for any boot-time kernel argument.
How
  • New --kernel-arg <arg> option (repeatable) on Flags.Management.
  • Utility.getKernel appends the user args onto kernel.commandLine.kernelArgs, which is persisted into the container bundle.
  • RuntimeService.bootstrap now applies its built-in defaults per-key, skipping any default whose key the user already supplied. Defaults are expressed as a small keyed table, so this also lets oops= be overridden and makes future defaults easy to add.
Default behavior is unchanged for anyone who does not pass --kernel-arg — the same oops=panic and lsm=... args are applied.
Testing
  • swift build clean.
  • container run --help renders the new flag.
@noah-thor
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Jul 22, 2026

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Can you please sign the commit: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits
Actual code change looks good to me
@arirubinstein
Allow custom kernel boot args via --kernel-arg
8fb74fe
Add a repeatable --kernel-arg flag to plumb arbitrary boot arguments
onto the kernel command line. User-supplied args are persisted on the
kernel in the bundle, and the runtime's built-in defaults (oops=panic,
lsm=...) are now applied per-key only when the user has not already
supplied that key. This lets custom kernels override the LSM stack,
e.g. to enable BPF LSM with:
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf
Signed-off-by: Ari Rubinstein <22369+arirubinstein@users.noreply.github.com>
@arirubinstein
arirubinstein
commented
Jul 22, 2026

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Signed and rebased
@github-actions
github-actionsBot
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Jul 23, 2026

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Code Coverage
TierLine Coverage
Unit23.38%
Integration66.49%
Combined75.44%
@crosbymichael
crosbymichael
merged commit b229cec
into
apple:mainJul 27, 2026

3 checks passed

@stephenlclarkestephenlclarke
mentioned this pull request
Jul 27, 2026
 Merged

@synkathairosynkathairo
mentioned this pull request
Jul 29, 2026
 Merged

@github-actionsgithub-actionsBot
mentioned this pull request
Jul 31, 2026
 Merged

6 tasks
andrewkomkov added a commit
to getgantry/gantry
that referenced
this pull request
Aug 1, 2026
@github-actions@andrewkomkov
feat(containers): boot containers from a custom kernel with custom bo…
e9d2df2
…ot args (#14)
apple/container **1.2.0** is out (previously tracked: `1.1.0`).
Upstream notes: https://github.com/apple/container/releases/tag/1.2.0 —
mirrored in `docs/upstream/apple-container-1.2.0.md`.
## Review checklist
- [ ] New or changed CLI flags Gantry should surface (`container
run/create/machine/build`)
- [ ] Changed `--format json` shapes the DockerKit apple transport
decodes
- [ ] Fixed upstream bugs Gantry currently works around
- [ ] `ContainerTooling.recommendedVersion` / feature gates need moving
to `1.2.0`
- [ ] MCP tools and App Intents that expose the affected commands
- [ ] README and CHANGELOG entries for whatever is adopted
Merging records the version as reviewed. Implement the adopted parts on
this branch, or merge as-is and open follow-ups.
---
<details><summary>Upstream release notes</summary>
## What's Changed
* Add TestCLISystemLogs and TestCLITermIO integration tests in new
integration test suite by @katiewasnothere in
apple/container#1879
* Restore reverted migrations, migrate last tests. by @jglogan in
apple/container#1880
* Removes obsolete CLITests directory. by @jglogan in
apple/container#1886
* Integration coverage xpc helpers by @noah-thor in
apple/container#1551
* Upgrade grpc-swift-nio-transport to 2.9.0 and remove HTTP2ConnectBuff…
by @adityabagchi24 in apple/container#1790
* Updates containerization to 0.36.0. by @jglogan in
apple/container#1912
* Use containerization version 0.37.0 by @adityaramani in
apple/container#1932
* Verify kernel archive integrity by @haoruilee in
apple/container#1703
* Add commit/issue alert to PR template. by @jglogan in
apple/container#1945
* Remove `--skip-build` from test Makefile target. by @jglogan in
apple/container#1951
* Restore `--skip-build`, enable `import testable` for release builds.
by @jglogan in apple/container#1955
* [package]: bump container-builder-shim to 0.13.0 by @saehejkang in
apple/container#1953
* Validate container ID from XPC requests by @katiewasnothere in
apple/container#1956
* Remove force unwraps on XPC error set/get by @katiewasnothere in
apple/container#1958
* Do not follow destination symlink when copying user configuration by
@katiewasnothere in apple/container#1957
* Fix machine ID length test. by @jglogan in
apple/container#1971
* Address flaky TestCLIKernelSetSerial suite. by @jglogan in
apple/container#1976
* [gitignore]: ignore vscode workspace files by @saehejkang in
apple/container#1966
* Update containerization dependency with new EXT4Unpacker func
definition by @katiewasnothere in
apple/container#1973
* Periodic dependency updates. by @jglogan in
apple/container#1981
* Use ordered journal mode for unpacked images. by @jglogan in
apple/container#1974
* Reword DNS container name resolution doc information by
@katiewasnothere in apple/container#1960
* ci: bump the github-actions group across 1 directory with 3 updates by
@dependabot[bot] in apple/container#1983
* Pass build config in when building protoc dependencies by
@katiewasnothere in apple/container#1972
* Container test fixture package by @katiewasnothere in
apple/container#1887
* Downgrade swift-collections to 1.5.1. by @jglogan in
apple/container#1984
* Use `enum` for warmup images. by @jglogan in
apple/container#1990
* Add missing dependencies to new ContainerTestSupport package by
@katiewasnothere in apple/container#1994
* Add OCI maskedPaths and readonlyPaths support to Container API. by
@jglogan in apple/container#1996
* Integration test - miscellaneous fixture and test refinements. by
@jglogan in apple/container#1993
* Use log instead of print for system start status messages by
@adityabagchi24 in apple/container#1889
* Fix BuilderStart race, parallelize `container build` tests. by
@jglogan in apple/container#2002
* Allow custom kernel boot args via --kernel-arg by @arirubinstein in
apple/container#1744
* fix: Increase XPC timeout for Machine API operations by @dev-kvt in
apple/container#2006
* Update containerization import to latest 0.40.0 by @katiewasnothere in
apple/container#2028
* Fix image env vars, build context checks, TCP/UDP port forward buffer,
and validate plugin name by @katiewasnothere in
apple/container#2027
* Update containerization import to 0.40.1 by @katiewasnothere in
apple/container#2038
## New Contributors
* @haoruilee made their first contribution in
apple/container#1703
* @arirubinstein made their first contribution in
apple/container#1744
* @dev-kvt made their first contribution in
apple/container#2006
**Full Changelog**:
apple/container@1.1.0...1.2.0
</details>
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Andrew <Andrew.Komkov@gmail.com>

This was referenced Aug 1, 2026
 Merged

 Merged


This was referenced Aug 4, 2026

Closed

 Merged

henrywang added a commit
to henrywang/Berthly
that referenced
this pull request
Aug 4, 2026
@henrywang
feat: add --kernel-arg support to Run/Create sheet (#85)
d576300
## Summary
- container 1.2.0 added a repeatable `--kernel-arg` flag
(apple/container#1744) for appending raw boot arguments to the kernel
command line — e.g. adding `bpf` to the runtime's hardcoded LSM list to
enable BPF LSM, previously impossible. `Flags.Management` gained a
required `kernelArgs` parameter in the same release, confirming the API
is reachable from Berthly's native XPC calls, not just the CLI.
- `RunOptions` gained `kernelArgs: [String]`, threaded through
`LiveContainerService.runManagementFlags(for:)` into
`Flags.Management.kernelArgs`.
- New "Kernel boot arguments" `StringListEditor` on the Run/Create
sheet's Security tab, alongside the existing capAdd/capDrop editors it
mirrors.
- `PARITY.md`'s flag-surface list updated in the same commit.
- `Localizable.xcstrings` synced for the new field's string.
## Why
Part of the container 1.2.0 milestone (#78) — the SPM bump (#75)
surfaced this as a newly-required parameter, confirming the feature is
implementable at the API level Berthly actually calls.
Closes#78
## Test plan
- [x] `xcodebuild build` succeeds
- [x] `xcodebuild test -only-testing:BerthlyTests` — full suite passes,
including new coverage for `kernelArgs` in
`managementFlagsMapInteractiveVirtualizationCapsAndCidFile`
- [x] `swiftlint lint --strict` — 0 violations
- [x] Verified visually via Xcode's live preview renderer — confirmed
the new field renders on the Security tab using the working `capAdd`
pattern
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Reviewers

@crosbymichaelcrosbymichaelcrosbymichael approved these changes
@noah-thornoah-thornoah-thor approved these changes

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
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})();
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
Allow custom kernel boot args via --kernel-arg by arirubinstein · Pull Request #1744 · apple/container · GitHub
Skip to content
Allow custom kernel boot args via --kernel-arg - #1744
Merged
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
Jul 27, 2026
Merged
Allow custom kernel boot args via --kernel-arg#1744
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
Conversation
@arirubinstein
@arirubinsteinarirubinstein
commented
Jun 17, 2026•

edited

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Contributor
Type of Change
  •  Bug fix
  •  New feature
  •  Breaking change
  •  Documentation update
What
Adds a repeatable --kernel-arg flag to container run/container create for appending arbitrary boot arguments to the kernel command line.
container run --kernel /path/to/custom-bzImage \
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf \
...

Why
The runtime hardcodes lsm=lockdown,capability,landlock,yama,apparmor (and oops=panic) onto every kernel command line in RuntimeService.bootstrap. With a custom kernel there is no way to adjust this — e.g. to enable BPF LSM you need lsm=...,bpf, which is currently impossible. More generally there is no escape hatch for any boot-time kernel argument.
How
  • New --kernel-arg <arg> option (repeatable) on Flags.Management.
  • Utility.getKernel appends the user args onto kernel.commandLine.kernelArgs, which is persisted into the container bundle.
  • RuntimeService.bootstrap now applies its built-in defaults per-key, skipping any default whose key the user already supplied. Defaults are expressed as a small keyed table, so this also lets oops= be overridden and makes future defaults easy to add.
Default behavior is unchanged for anyone who does not pass --kernel-arg — the same oops=panic and lsm=... args are applied.
Testing
  • swift build clean.
  • container run --help renders the new flag.
@noah-thor
noah-thor
commented
Jul 22, 2026

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Can you please sign the commit: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits
Actual code change looks good to me
@arirubinstein
Allow custom kernel boot args via --kernel-arg
8fb74fe
Add a repeatable --kernel-arg flag to plumb arbitrary boot arguments
onto the kernel command line. User-supplied args are persisted on the
kernel in the bundle, and the runtime's built-in defaults (oops=panic,
lsm=...) are now applied per-key only when the user has not already
supplied that key. This lets custom kernels override the LSM stack,
e.g. to enable BPF LSM with:
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf
Signed-off-by: Ari Rubinstein <22369+arirubinstein@users.noreply.github.com>
@arirubinstein
arirubinstein
commented
Jul 22, 2026

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Signed and rebased
@github-actions
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Jul 23, 2026

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Code Coverage
TierLine Coverage
Unit23.38%
Integration66.49%
Combined75.44%
@crosbymichael
crosbymichael
merged commit b229cec
into
apple:mainJul 27, 2026

3 checks passed

@stephenlclarkestephenlclarke
mentioned this pull request
Jul 27, 2026
 Merged

@synkathairosynkathairo
mentioned this pull request
Jul 29, 2026
 Merged

@github-actionsgithub-actionsBot
mentioned this pull request
Jul 31, 2026
 Merged

6 tasks
andrewkomkov added a commit
to getgantry/gantry
that referenced
this pull request
Aug 1, 2026
@github-actions@andrewkomkov
feat(containers): boot containers from a custom kernel with custom bo…
e9d2df2
…ot args (#14)
apple/container **1.2.0** is out (previously tracked: `1.1.0`).
Upstream notes: https://github.com/apple/container/releases/tag/1.2.0 —
mirrored in `docs/upstream/apple-container-1.2.0.md`.
## Review checklist
- [ ] New or changed CLI flags Gantry should surface (`container
run/create/machine/build`)
- [ ] Changed `--format json` shapes the DockerKit apple transport
decodes
- [ ] Fixed upstream bugs Gantry currently works around
- [ ] `ContainerTooling.recommendedVersion` / feature gates need moving
to `1.2.0`
- [ ] MCP tools and App Intents that expose the affected commands
- [ ] README and CHANGELOG entries for whatever is adopted
Merging records the version as reviewed. Implement the adopted parts on
this branch, or merge as-is and open follow-ups.
---
<details><summary>Upstream release notes</summary>
## What's Changed
* Add TestCLISystemLogs and TestCLITermIO integration tests in new
integration test suite by @katiewasnothere in
apple/container#1879
* Restore reverted migrations, migrate last tests. by @jglogan in
apple/container#1880
* Removes obsolete CLITests directory. by @jglogan in
apple/container#1886
* Integration coverage xpc helpers by @noah-thor in
apple/container#1551
* Upgrade grpc-swift-nio-transport to 2.9.0 and remove HTTP2ConnectBuff…
by @adityabagchi24 in apple/container#1790
* Updates containerization to 0.36.0. by @jglogan in
apple/container#1912
* Use containerization version 0.37.0 by @adityaramani in
apple/container#1932
* Verify kernel archive integrity by @haoruilee in
apple/container#1703
* Add commit/issue alert to PR template. by @jglogan in
apple/container#1945
* Remove `--skip-build` from test Makefile target. by @jglogan in
apple/container#1951
* Restore `--skip-build`, enable `import testable` for release builds.
by @jglogan in apple/container#1955
* [package]: bump container-builder-shim to 0.13.0 by @saehejkang in
apple/container#1953
* Validate container ID from XPC requests by @katiewasnothere in
apple/container#1956
* Remove force unwraps on XPC error set/get by @katiewasnothere in
apple/container#1958
* Do not follow destination symlink when copying user configuration by
@katiewasnothere in apple/container#1957
* Fix machine ID length test. by @jglogan in
apple/container#1971
* Address flaky TestCLIKernelSetSerial suite. by @jglogan in
apple/container#1976
* [gitignore]: ignore vscode workspace files by @saehejkang in
apple/container#1966
* Update containerization dependency with new EXT4Unpacker func
definition by @katiewasnothere in
apple/container#1973
* Periodic dependency updates. by @jglogan in
apple/container#1981
* Use ordered journal mode for unpacked images. by @jglogan in
apple/container#1974
* Reword DNS container name resolution doc information by
@katiewasnothere in apple/container#1960
* ci: bump the github-actions group across 1 directory with 3 updates by
@dependabot[bot] in apple/container#1983
* Pass build config in when building protoc dependencies by
@katiewasnothere in apple/container#1972
* Container test fixture package by @katiewasnothere in
apple/container#1887
* Downgrade swift-collections to 1.5.1. by @jglogan in
apple/container#1984
* Use `enum` for warmup images. by @jglogan in
apple/container#1990
* Add missing dependencies to new ContainerTestSupport package by
@katiewasnothere in apple/container#1994
* Add OCI maskedPaths and readonlyPaths support to Container API. by
@jglogan in apple/container#1996
* Integration test - miscellaneous fixture and test refinements. by
@jglogan in apple/container#1993
* Use log instead of print for system start status messages by
@adityabagchi24 in apple/container#1889
* Fix BuilderStart race, parallelize `container build` tests. by
@jglogan in apple/container#2002
* Allow custom kernel boot args via --kernel-arg by @arirubinstein in
apple/container#1744
* fix: Increase XPC timeout for Machine API operations by @dev-kvt in
apple/container#2006
* Update containerization import to latest 0.40.0 by @katiewasnothere in
apple/container#2028
* Fix image env vars, build context checks, TCP/UDP port forward buffer,
and validate plugin name by @katiewasnothere in
apple/container#2027
* Update containerization import to 0.40.1 by @katiewasnothere in
apple/container#2038
## New Contributors
* @haoruilee made their first contribution in
apple/container#1703
* @arirubinstein made their first contribution in
apple/container#1744
* @dev-kvt made their first contribution in
apple/container#2006
**Full Changelog**:
apple/container@1.1.0...1.2.0
</details>
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Andrew <Andrew.Komkov@gmail.com>

This was referenced Aug 1, 2026
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henrywang added a commit
to henrywang/Berthly
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Aug 4, 2026
@henrywang
feat: add --kernel-arg support to Run/Create sheet (#85)
d576300
## Summary
- container 1.2.0 added a repeatable `--kernel-arg` flag
(apple/container#1744) for appending raw boot arguments to the kernel
command line — e.g. adding `bpf` to the runtime's hardcoded LSM list to
enable BPF LSM, previously impossible. `Flags.Management` gained a
required `kernelArgs` parameter in the same release, confirming the API
is reachable from Berthly's native XPC calls, not just the CLI.
- `RunOptions` gained `kernelArgs: [String]`, threaded through
`LiveContainerService.runManagementFlags(for:)` into
`Flags.Management.kernelArgs`.
- New "Kernel boot arguments" `StringListEditor` on the Run/Create
sheet's Security tab, alongside the existing capAdd/capDrop editors it
mirrors.
- `PARITY.md`'s flag-surface list updated in the same commit.
- `Localizable.xcstrings` synced for the new field's string.
## Why
Part of the container 1.2.0 milestone (#78) — the SPM bump (#75)
surfaced this as a newly-required parameter, confirming the feature is
implementable at the API level Berthly actually calls.
Closes#78
## Test plan
- [x] `xcodebuild build` succeeds
- [x] `xcodebuild test -only-testing:BerthlyTests` — full suite passes,
including new coverage for `kernelArgs` in
`managementFlagsMapInteractiveVirtualizationCapsAndCidFile`
- [x] `swiftlint lint --strict` — 0 violations
- [x] Verified visually via Xcode's live preview renderer — confirmed
the new field renders on the Security tab using the working `capAdd`
pattern
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Allow custom kernel boot args via --kernel-arg by arirubinstein · Pull Request #1744 · apple/container · GitHub
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Allow custom kernel boot args via --kernel-arg - #1744
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crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
Jul 27, 2026
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Allow custom kernel boot args via --kernel-arg#1744
crosbymichael merged 1 commit into
apple:mainfrom 
arirubinstein:kernel-arg-boot-args
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@arirubinstein
@arirubinsteinarirubinstein
commented
Jun 17, 2026•

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Type of Change
  •  Bug fix
  •  New feature
  •  Breaking change
  •  Documentation update
What
Adds a repeatable --kernel-arg flag to container run/container create for appending arbitrary boot arguments to the kernel command line.
container run --kernel /path/to/custom-bzImage \
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf \
...

Why
The runtime hardcodes lsm=lockdown,capability,landlock,yama,apparmor (and oops=panic) onto every kernel command line in RuntimeService.bootstrap. With a custom kernel there is no way to adjust this — e.g. to enable BPF LSM you need lsm=...,bpf, which is currently impossible. More generally there is no escape hatch for any boot-time kernel argument.
How
  • New --kernel-arg <arg> option (repeatable) on Flags.Management.
  • Utility.getKernel appends the user args onto kernel.commandLine.kernelArgs, which is persisted into the container bundle.
  • RuntimeService.bootstrap now applies its built-in defaults per-key, skipping any default whose key the user already supplied. Defaults are expressed as a small keyed table, so this also lets oops= be overridden and makes future defaults easy to add.
Default behavior is unchanged for anyone who does not pass --kernel-arg — the same oops=panic and lsm=... args are applied.
Testing
  • swift build clean.
  • container run --help renders the new flag.
@noah-thor
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Jul 22, 2026

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Can you please sign the commit: https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits
Actual code change looks good to me
@arirubinstein
Allow custom kernel boot args via --kernel-arg
8fb74fe
Add a repeatable --kernel-arg flag to plumb arbitrary boot arguments
onto the kernel command line. User-supplied args are persisted on the
kernel in the bundle, and the runtime's built-in defaults (oops=panic,
lsm=...) are now applied per-key only when the user has not already
supplied that key. This lets custom kernels override the LSM stack,
e.g. to enable BPF LSM with:
--kernel-arg lsm=lockdown,capability,landlock,yama,apparmor,bpf
Signed-off-by: Ari Rubinstein <22369+arirubinstein@users.noreply.github.com>
@arirubinstein
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Jul 22, 2026

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Jul 23, 2026

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Code Coverage
TierLine Coverage
Unit23.38%
Integration66.49%
Combined75.44%
@crosbymichael
crosbymichael
merged commit b229cec
into
apple:mainJul 27, 2026

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Jul 31, 2026
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6 tasks
andrewkomkov added a commit
to getgantry/gantry
that referenced
this pull request
Aug 1, 2026
@github-actions@andrewkomkov
feat(containers): boot containers from a custom kernel with custom bo…
e9d2df2
…ot args (#14)
apple/container **1.2.0** is out (previously tracked: `1.1.0`).
Upstream notes: https://github.com/apple/container/releases/tag/1.2.0 —
mirrored in `docs/upstream/apple-container-1.2.0.md`.
## Review checklist
- [ ] New or changed CLI flags Gantry should surface (`container
run/create/machine/build`)
- [ ] Changed `--format json` shapes the DockerKit apple transport
decodes
- [ ] Fixed upstream bugs Gantry currently works around
- [ ] `ContainerTooling.recommendedVersion` / feature gates need moving
to `1.2.0`
- [ ] MCP tools and App Intents that expose the affected commands
- [ ] README and CHANGELOG entries for whatever is adopted
Merging records the version as reviewed. Implement the adopted parts on
this branch, or merge as-is and open follow-ups.
---
<details><summary>Upstream release notes</summary>
## What's Changed
* Add TestCLISystemLogs and TestCLITermIO integration tests in new
integration test suite by @katiewasnothere in
apple/container#1879
* Restore reverted migrations, migrate last tests. by @jglogan in
apple/container#1880
* Removes obsolete CLITests directory. by @jglogan in
apple/container#1886
* Integration coverage xpc helpers by @noah-thor in
apple/container#1551
* Upgrade grpc-swift-nio-transport to 2.9.0 and remove HTTP2ConnectBuff…
by @adityabagchi24 in apple/container#1790
* Updates containerization to 0.36.0. by @jglogan in
apple/container#1912
* Use containerization version 0.37.0 by @adityaramani in
apple/container#1932
* Verify kernel archive integrity by @haoruilee in
apple/container#1703
* Add commit/issue alert to PR template. by @jglogan in
apple/container#1945
* Remove `--skip-build` from test Makefile target. by @jglogan in
apple/container#1951
* Restore `--skip-build`, enable `import testable` for release builds.
by @jglogan in apple/container#1955
* [package]: bump container-builder-shim to 0.13.0 by @saehejkang in
apple/container#1953
* Validate container ID from XPC requests by @katiewasnothere in
apple/container#1956
* Remove force unwraps on XPC error set/get by @katiewasnothere in
apple/container#1958
* Do not follow destination symlink when copying user configuration by
@katiewasnothere in apple/container#1957
* Fix machine ID length test. by @jglogan in
apple/container#1971
* Address flaky TestCLIKernelSetSerial suite. by @jglogan in
apple/container#1976
* [gitignore]: ignore vscode workspace files by @saehejkang in
apple/container#1966
* Update containerization dependency with new EXT4Unpacker func
definition by @katiewasnothere in
apple/container#1973
* Periodic dependency updates. by @jglogan in
apple/container#1981
* Use ordered journal mode for unpacked images. by @jglogan in
apple/container#1974
* Reword DNS container name resolution doc information by
@katiewasnothere in apple/container#1960
* ci: bump the github-actions group across 1 directory with 3 updates by
@dependabot[bot] in apple/container#1983
* Pass build config in when building protoc dependencies by
@katiewasnothere in apple/container#1972
* Container test fixture package by @katiewasnothere in
apple/container#1887
* Downgrade swift-collections to 1.5.1. by @jglogan in
apple/container#1984
* Use `enum` for warmup images. by @jglogan in
apple/container#1990
* Add missing dependencies to new ContainerTestSupport package by
@katiewasnothere in apple/container#1994
* Add OCI maskedPaths and readonlyPaths support to Container API. by
@jglogan in apple/container#1996
* Integration test - miscellaneous fixture and test refinements. by
@jglogan in apple/container#1993
* Use log instead of print for system start status messages by
@adityabagchi24 in apple/container#1889
* Fix BuilderStart race, parallelize `container build` tests. by
@jglogan in apple/container#2002
* Allow custom kernel boot args via --kernel-arg by @arirubinstein in
apple/container#1744
* fix: Increase XPC timeout for Machine API operations by @dev-kvt in
apple/container#2006
* Update containerization import to latest 0.40.0 by @katiewasnothere in
apple/container#2028
* Fix image env vars, build context checks, TCP/UDP port forward buffer,
and validate plugin name by @katiewasnothere in
apple/container#2027
* Update containerization import to 0.40.1 by @katiewasnothere in
apple/container#2038
## New Contributors
* @haoruilee made their first contribution in
apple/container#1703
* @arirubinstein made their first contribution in
apple/container#1744
* @dev-kvt made their first contribution in
apple/container#2006
**Full Changelog**:
apple/container@1.1.0...1.2.0
</details>
---------
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Andrew <Andrew.Komkov@gmail.com>

This was referenced Aug 1, 2026
 Merged

 Merged


This was referenced Aug 4, 2026

Closed

 Merged

henrywang added a commit
to henrywang/Berthly
that referenced
this pull request
Aug 4, 2026
@henrywang
feat: add --kernel-arg support to Run/Create sheet (#85)
d576300
## Summary
- container 1.2.0 added a repeatable `--kernel-arg` flag
(apple/container#1744) for appending raw boot arguments to the kernel
command line — e.g. adding `bpf` to the runtime's hardcoded LSM list to
enable BPF LSM, previously impossible. `Flags.Management` gained a
required `kernelArgs` parameter in the same release, confirming the API
is reachable from Berthly's native XPC calls, not just the CLI.
- `RunOptions` gained `kernelArgs: [String]`, threaded through
`LiveContainerService.runManagementFlags(for:)` into
`Flags.Management.kernelArgs`.
- New "Kernel boot arguments" `StringListEditor` on the Run/Create
sheet's Security tab, alongside the existing capAdd/capDrop editors it
mirrors.
- `PARITY.md`'s flag-surface list updated in the same commit.
- `Localizable.xcstrings` synced for the new field's string.
## Why
Part of the container 1.2.0 milestone (#78) — the SPM bump (#75)
surfaced this as a newly-required parameter, confirming the feature is
implementable at the API level Berthly actually calls.
Closes#78
## Test plan
- [x] `xcodebuild build` succeeds
- [x] `xcodebuild test -only-testing:BerthlyTests` — full suite passes,
including new coverage for `kernelArgs` in
`managementFlagsMapInteractiveVirtualizationCapsAndCidFile`
- [x] `swiftlint lint --strict` — 0 violations
- [x] Verified visually via Xcode's live preview renderer — confirmed
the new field renders on the Security tab using the working `capAdd`
pattern
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@crosbymichaelcrosbymichaelcrosbymichael approved these changes
@noah-thornoah-thornoah-thor approved these changes

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3 participants

@arirubinstein@noah-thor@crosbymichael