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sample-cli-plugin

This repository implements a single kubectl plugin for switching the namespace that the current KUBECONFIG context points to. In order to remain as indestructive as possible, no existing contexts are modified.

Note: go-get or vendor this package as k8s.io/sample-cli-plugin.

This particular example demonstrates how to perform basic operations such as:

  • How to create a new custom command that follows kubectl patterns
  • How to obtain a user's KUBECONFIG settings and modify them
  • How to make general use of the provided "cli-runtime" set of helpers for kubectl and third-party plugins

It makes use of the genericclioptions in k8s.io/cli-runtime to generate a set of configuration flags which are in turn used to generate a raw representation of the user's KUBECONFIG, as well as to obtain configuration which can be used with RESTClients when sending requests to a kubernetes api server.

Details

The sample cli plugin uses the client-go library to patch an existing KUBECONFIG file in a user's environment in order to update context information to point the client to a new or existing namespace.

In order to be as non-destructive as possible, no existing contexts are modified in any way. Rather, the current context is examined, and matched against existing contexts to find a context containing the same "AuthInfo" and "Cluster" information, but with the newly desired namespace requested by the user.

Purpose

This is an example of how to build a kubectl plugin using the same set of tools and helpers available to kubectl.

Running

# assumes you have a working KUBECONFIG
$ go build cmd/kubectl-ns.go
# place the built binary somewhere in your PATH
$ cp ./kubectl-ns /usr/local/bin
# you can now begin using this plugin as a regular kubectl command:# update your configuration to point to "new-namespace"
$ kubectl ns new-namespace
# any kubectl commands you perform from now on will use "new-namespace"
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
new-namespace-pod 1/1 Running 0 1h
# list all of the namespace in use by contexts in your KUBECONFIG
$ kubectl ns --list
# show the namespace that the currently set context in your KUBECONFIG points to
$ kubectl ns

Use Cases

This plugin can be used as a developer tool, in order to quickly view or change the current namespace that kubectl points to.

It can also be used as a means of showcasing usage of the cli-runtime set of utilities to aid in third-party plugin development.

Cleanup

You can "uninstall" this plugin from kubectl by simply removing it from your PATH:

$ rm /usr/local/bin/kubectl-ns

Compatibility

HEAD of this repository will match HEAD of k8s.io/apimachinery and k8s.io/client-go.

Where does it come from?

sample-cli-plugin is synced from https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/sample-cli-plugin. Code changes are made in that location, merged into k8s.io/kubernetes and later synced here.

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Sample kubectl plugin

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all
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(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
GitHub - Samaws1/sample-cli-plugin: Sample kubectl plugin · GitHub
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sample-cli-plugin

This repository implements a single kubectl plugin for switching the namespace that the current KUBECONFIG context points to. In order to remain as indestructive as possible, no existing contexts are modified.

Note: go-get or vendor this package as k8s.io/sample-cli-plugin.

This particular example demonstrates how to perform basic operations such as:

  • How to create a new custom command that follows kubectl patterns
  • How to obtain a user's KUBECONFIG settings and modify them
  • How to make general use of the provided "cli-runtime" set of helpers for kubectl and third-party plugins

It makes use of the genericclioptions in k8s.io/cli-runtime to generate a set of configuration flags which are in turn used to generate a raw representation of the user's KUBECONFIG, as well as to obtain configuration which can be used with RESTClients when sending requests to a kubernetes api server.

Details

The sample cli plugin uses the client-go library to patch an existing KUBECONFIG file in a user's environment in order to update context information to point the client to a new or existing namespace.

In order to be as non-destructive as possible, no existing contexts are modified in any way. Rather, the current context is examined, and matched against existing contexts to find a context containing the same "AuthInfo" and "Cluster" information, but with the newly desired namespace requested by the user.

Purpose

This is an example of how to build a kubectl plugin using the same set of tools and helpers available to kubectl.

Running

# assumes you have a working KUBECONFIG
$ go build cmd/kubectl-ns.go
# place the built binary somewhere in your PATH
$ cp ./kubectl-ns /usr/local/bin
# you can now begin using this plugin as a regular kubectl command:# update your configuration to point to "new-namespace"
$ kubectl ns new-namespace
# any kubectl commands you perform from now on will use "new-namespace"
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
new-namespace-pod 1/1 Running 0 1h
# list all of the namespace in use by contexts in your KUBECONFIG
$ kubectl ns --list
# show the namespace that the currently set context in your KUBECONFIG points to
$ kubectl ns

Use Cases

This plugin can be used as a developer tool, in order to quickly view or change the current namespace that kubectl points to.

It can also be used as a means of showcasing usage of the cli-runtime set of utilities to aid in third-party plugin development.

Cleanup

You can "uninstall" this plugin from kubectl by simply removing it from your PATH:

$ rm /usr/local/bin/kubectl-ns

Compatibility

HEAD of this repository will match HEAD of k8s.io/apimachinery and k8s.io/client-go.

Where does it come from?

sample-cli-plugin is synced from https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/sample-cli-plugin. Code changes are made in that location, merged into k8s.io/kubernetes and later synced here.

About

Sample kubectl plugin

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0 watching

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Force GitHub README to respect dark mode (function() { var style = document.createElement('style'); style.textContent = ' .markdown-body { color-scheme: dark light; } .markdown-body pre { background: #161b22 !important; } .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; } .markdown-body table th, .markdown-body table td { border-color: #30363d !important; } .markdown-body img { background: #0d1117; } .markdown-body blockquote { border-left-color: #8b949e; } .markdown-body hr { border-color: #30363d; } '; document.head.appendChild(style); })(); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' GitHub - Samaws1/sample-cli-plugin: Sample kubectl plugin · GitHub
Skip to content

Repository files navigation

sample-cli-plugin

This repository implements a single kubectl plugin for switching the namespace that the current KUBECONFIG context points to. In order to remain as indestructive as possible, no existing contexts are modified.

Note: go-get or vendor this package as k8s.io/sample-cli-plugin.

This particular example demonstrates how to perform basic operations such as:

  • How to create a new custom command that follows kubectl patterns
  • How to obtain a user's KUBECONFIG settings and modify them
  • How to make general use of the provided "cli-runtime" set of helpers for kubectl and third-party plugins

It makes use of the genericclioptions in k8s.io/cli-runtime to generate a set of configuration flags which are in turn used to generate a raw representation of the user's KUBECONFIG, as well as to obtain configuration which can be used with RESTClients when sending requests to a kubernetes api server.

Details

The sample cli plugin uses the client-go library to patch an existing KUBECONFIG file in a user's environment in order to update context information to point the client to a new or existing namespace.

In order to be as non-destructive as possible, no existing contexts are modified in any way. Rather, the current context is examined, and matched against existing contexts to find a context containing the same "AuthInfo" and "Cluster" information, but with the newly desired namespace requested by the user.

Purpose

This is an example of how to build a kubectl plugin using the same set of tools and helpers available to kubectl.

Running

# assumes you have a working KUBECONFIG
$ go build cmd/kubectl-ns.go
# place the built binary somewhere in your PATH
$ cp ./kubectl-ns /usr/local/bin
# you can now begin using this plugin as a regular kubectl command:# update your configuration to point to "new-namespace"
$ kubectl ns new-namespace
# any kubectl commands you perform from now on will use "new-namespace"
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
new-namespace-pod 1/1 Running 0 1h
# list all of the namespace in use by contexts in your KUBECONFIG
$ kubectl ns --list
# show the namespace that the currently set context in your KUBECONFIG points to
$ kubectl ns

Use Cases

This plugin can be used as a developer tool, in order to quickly view or change the current namespace that kubectl points to.

It can also be used as a means of showcasing usage of the cli-runtime set of utilities to aid in third-party plugin development.

Cleanup

You can "uninstall" this plugin from kubectl by simply removing it from your PATH:

$ rm /usr/local/bin/kubectl-ns

Compatibility

HEAD of this repository will match HEAD of k8s.io/apimachinery and k8s.io/client-go.

Where does it come from?

sample-cli-plugin is synced from https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/sample-cli-plugin. Code changes are made in that location, merged into k8s.io/kubernetes and later synced here.

About

Sample kubectl plugin

Topics

Resources

Code of conduct

Contributing

Stars

1 star

Watchers

0 watching

Forks

Releases

Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { // Highlight search terms from Google/DuckDuckGo/Bing referrer (function() { var ref = document.referrer; var terms = []; if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) { var url = new URL(ref); var q = url.searchParams.get('q') || url.searchParams.get('p'); if (q) { terms = q.split(/\s+/).filter(function(t) { return t.length > 2; }); } } if (terms.length === 0) return; var style = document.createElement('style'); style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }'; document.head.appendChild(style); function highlight(node) { if (node.nodeType === 3) { // text node var text = node.textContent; var found = false; terms.forEach(function(term) { var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi'); if (regex.test(text)) { found = true; var frag = document.createDocumentFragment(); var parts = text.split(regex); parts.forEach(function(part, i) { if (i % 2 === 0) { frag.appendChild(document.createTextNode(part)); } else { var span = document.createElement('span'); span.className = 'userscript-highlight'; span.textContent = part; frag.appendChild(span); } }); node.parentNode.replaceChild(frag, node); } }); } else if (node.nodeType === 1 && node.childNodes) { // element var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT']; if (!skipTags.includes(node.tagName)) { Array.from(node.childNodes).forEach(highlight); } } } highlight(document.body); // Re-highlight on dynamic content var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1 || node.nodeType === 3) highlight(node); }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' GitHub - Samaws1/sample-cli-plugin: Sample kubectl plugin · GitHub
Skip to content

Repository files navigation

sample-cli-plugin

This repository implements a single kubectl plugin for switching the namespace that the current KUBECONFIG context points to. In order to remain as indestructive as possible, no existing contexts are modified.

Note: go-get or vendor this package as k8s.io/sample-cli-plugin.

This particular example demonstrates how to perform basic operations such as:

  • How to create a new custom command that follows kubectl patterns
  • How to obtain a user's KUBECONFIG settings and modify them
  • How to make general use of the provided "cli-runtime" set of helpers for kubectl and third-party plugins

It makes use of the genericclioptions in k8s.io/cli-runtime to generate a set of configuration flags which are in turn used to generate a raw representation of the user's KUBECONFIG, as well as to obtain configuration which can be used with RESTClients when sending requests to a kubernetes api server.

Details

The sample cli plugin uses the client-go library to patch an existing KUBECONFIG file in a user's environment in order to update context information to point the client to a new or existing namespace.

In order to be as non-destructive as possible, no existing contexts are modified in any way. Rather, the current context is examined, and matched against existing contexts to find a context containing the same "AuthInfo" and "Cluster" information, but with the newly desired namespace requested by the user.

Purpose

This is an example of how to build a kubectl plugin using the same set of tools and helpers available to kubectl.

Running

# assumes you have a working KUBECONFIG
$ go build cmd/kubectl-ns.go
# place the built binary somewhere in your PATH
$ cp ./kubectl-ns /usr/local/bin
# you can now begin using this plugin as a regular kubectl command:# update your configuration to point to "new-namespace"
$ kubectl ns new-namespace
# any kubectl commands you perform from now on will use "new-namespace"
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
new-namespace-pod 1/1 Running 0 1h
# list all of the namespace in use by contexts in your KUBECONFIG
$ kubectl ns --list
# show the namespace that the currently set context in your KUBECONFIG points to
$ kubectl ns

Use Cases

This plugin can be used as a developer tool, in order to quickly view or change the current namespace that kubectl points to.

It can also be used as a means of showcasing usage of the cli-runtime set of utilities to aid in third-party plugin development.

Cleanup

You can "uninstall" this plugin from kubectl by simply removing it from your PATH:

$ rm /usr/local/bin/kubectl-ns

Compatibility

HEAD of this repository will match HEAD of k8s.io/apimachinery and k8s.io/client-go.

Where does it come from?

sample-cli-plugin is synced from https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/sample-cli-plugin. Code changes are made in that location, merged into k8s.io/kubernetes and later synced here.

About

Sample kubectl plugin

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Resources

Code of conduct

Contributing

Stars

1 star

Watchers

0 watching

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Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { // Strip utm_, fbclid, gclid, etc. from all links on page (function() { var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content', 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid', 'ref', 'ref_src', 'source', 'medium', 'campaign']; function cleanUrl(url) { try { var u = new URL(url, window.location.origin); var changed = false; trackingParams.forEach(function(p) { if (u.searchParams.has(p)) { u.searchParams.delete(p); changed = true; } }); return changed ? u.toString() : url; } catch (e) { return url; } } function cleanLinks() { document.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } cleanLinks(); var observer = new MutationObserver(function(mutations) { mutations.forEach(function(m) { m.addedNodes.forEach(function(node) { if (node.nodeType === 1) { if (node.tagName === 'A') cleanLinks(); node.querySelectorAll('a[href]').forEach(function(a) { var clean = cleanUrl(a.href); if (clean !== a.href) a.href = clean; }); } }); }); }); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + ' GitHub - Samaws1/sample-cli-plugin: Sample kubectl plugin · GitHub
Skip to content

Repository files navigation

sample-cli-plugin

This repository implements a single kubectl plugin for switching the namespace that the current KUBECONFIG context points to. In order to remain as indestructive as possible, no existing contexts are modified.

Note: go-get or vendor this package as k8s.io/sample-cli-plugin.

This particular example demonstrates how to perform basic operations such as:

  • How to create a new custom command that follows kubectl patterns
  • How to obtain a user's KUBECONFIG settings and modify them
  • How to make general use of the provided "cli-runtime" set of helpers for kubectl and third-party plugins

It makes use of the genericclioptions in k8s.io/cli-runtime to generate a set of configuration flags which are in turn used to generate a raw representation of the user's KUBECONFIG, as well as to obtain configuration which can be used with RESTClients when sending requests to a kubernetes api server.

Details

The sample cli plugin uses the client-go library to patch an existing KUBECONFIG file in a user's environment in order to update context information to point the client to a new or existing namespace.

In order to be as non-destructive as possible, no existing contexts are modified in any way. Rather, the current context is examined, and matched against existing contexts to find a context containing the same "AuthInfo" and "Cluster" information, but with the newly desired namespace requested by the user.

Purpose

This is an example of how to build a kubectl plugin using the same set of tools and helpers available to kubectl.

Running

# assumes you have a working KUBECONFIG
$ go build cmd/kubectl-ns.go
# place the built binary somewhere in your PATH
$ cp ./kubectl-ns /usr/local/bin
# you can now begin using this plugin as a regular kubectl command:# update your configuration to point to "new-namespace"
$ kubectl ns new-namespace
# any kubectl commands you perform from now on will use "new-namespace"
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
new-namespace-pod 1/1 Running 0 1h
# list all of the namespace in use by contexts in your KUBECONFIG
$ kubectl ns --list
# show the namespace that the currently set context in your KUBECONFIG points to
$ kubectl ns

Use Cases

This plugin can be used as a developer tool, in order to quickly view or change the current namespace that kubectl points to.

It can also be used as a means of showcasing usage of the cli-runtime set of utilities to aid in third-party plugin development.

Cleanup

You can "uninstall" this plugin from kubectl by simply removing it from your PATH:

$ rm /usr/local/bin/kubectl-ns

Compatibility

HEAD of this repository will match HEAD of k8s.io/apimachinery and k8s.io/client-go.

Where does it come from?

sample-cli-plugin is synced from https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/sample-cli-plugin. Code changes are made in that location, merged into k8s.io/kubernetes and later synced here.

About

Sample kubectl plugin

Topics

Resources

Code of conduct

Contributing

Stars

1 star

Watchers

0 watching

Forks

Releases

Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { // Auto-enable theater mode on YouTube (function() { function tryTheater() { var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]'); if (btn && !btn.classList.contains('activated')) { btn.click(); } } // Try immediately tryTheater(); // Try after navigation (SPA) var lastUrl = location.href; setInterval(function() { if (location.href !== lastUrl) { lastUrl = location.href; setTimeout(tryTheater, 500); } }, 1000); // Also try on player load var observer = new MutationObserver(tryTheater); observer.observe(document.body, { childList: true, subtree: true }); })(); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + ' GitHub - Samaws1/sample-cli-plugin: Sample kubectl plugin · GitHub
Skip to content

Repository files navigation

sample-cli-plugin

This repository implements a single kubectl plugin for switching the namespace that the current KUBECONFIG context points to. In order to remain as indestructive as possible, no existing contexts are modified.

Note: go-get or vendor this package as k8s.io/sample-cli-plugin.

This particular example demonstrates how to perform basic operations such as:

  • How to create a new custom command that follows kubectl patterns
  • How to obtain a user's KUBECONFIG settings and modify them
  • How to make general use of the provided "cli-runtime" set of helpers for kubectl and third-party plugins

It makes use of the genericclioptions in k8s.io/cli-runtime to generate a set of configuration flags which are in turn used to generate a raw representation of the user's KUBECONFIG, as well as to obtain configuration which can be used with RESTClients when sending requests to a kubernetes api server.

Details

The sample cli plugin uses the client-go library to patch an existing KUBECONFIG file in a user's environment in order to update context information to point the client to a new or existing namespace.

In order to be as non-destructive as possible, no existing contexts are modified in any way. Rather, the current context is examined, and matched against existing contexts to find a context containing the same "AuthInfo" and "Cluster" information, but with the newly desired namespace requested by the user.

Purpose

This is an example of how to build a kubectl plugin using the same set of tools and helpers available to kubectl.

Running

# assumes you have a working KUBECONFIG
$ go build cmd/kubectl-ns.go
# place the built binary somewhere in your PATH
$ cp ./kubectl-ns /usr/local/bin
# you can now begin using this plugin as a regular kubectl command:# update your configuration to point to "new-namespace"
$ kubectl ns new-namespace
# any kubectl commands you perform from now on will use "new-namespace"
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
new-namespace-pod 1/1 Running 0 1h
# list all of the namespace in use by contexts in your KUBECONFIG
$ kubectl ns --list
# show the namespace that the currently set context in your KUBECONFIG points to
$ kubectl ns

Use Cases

This plugin can be used as a developer tool, in order to quickly view or change the current namespace that kubectl points to.

It can also be used as a means of showcasing usage of the cli-runtime set of utilities to aid in third-party plugin development.

Cleanup

You can "uninstall" this plugin from kubectl by simply removing it from your PATH:

$ rm /usr/local/bin/kubectl-ns

Compatibility

HEAD of this repository will match HEAD of k8s.io/apimachinery and k8s.io/client-go.

Where does it come from?

sample-cli-plugin is synced from https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/sample-cli-plugin. Code changes are made in that location, merged into k8s.io/kubernetes and later synced here.

About

Sample kubectl plugin

Topics

Resources

Code of conduct

Contributing

Stars

1 star

Watchers

0 watching

Forks

Releases

Packages

Contributors

Languages

, '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) { if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') { el.style.position = 'static'; el.style.top = 'auto'; el.style.zIndex = 'auto'; } }); } unstick(); var observer = new MutationObserver(unstick); observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] }); })(); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); })(); GitHub - Samaws1/sample-cli-plugin: Sample kubectl plugin · GitHub
Skip to content

Repository files navigation

sample-cli-plugin

This repository implements a single kubectl plugin for switching the namespace that the current KUBECONFIG context points to. In order to remain as indestructive as possible, no existing contexts are modified.

Note: go-get or vendor this package as k8s.io/sample-cli-plugin.

This particular example demonstrates how to perform basic operations such as:

  • How to create a new custom command that follows kubectl patterns
  • How to obtain a user's KUBECONFIG settings and modify them
  • How to make general use of the provided "cli-runtime" set of helpers for kubectl and third-party plugins

It makes use of the genericclioptions in k8s.io/cli-runtime to generate a set of configuration flags which are in turn used to generate a raw representation of the user's KUBECONFIG, as well as to obtain configuration which can be used with RESTClients when sending requests to a kubernetes api server.

Details

The sample cli plugin uses the client-go library to patch an existing KUBECONFIG file in a user's environment in order to update context information to point the client to a new or existing namespace.

In order to be as non-destructive as possible, no existing contexts are modified in any way. Rather, the current context is examined, and matched against existing contexts to find a context containing the same "AuthInfo" and "Cluster" information, but with the newly desired namespace requested by the user.

Purpose

This is an example of how to build a kubectl plugin using the same set of tools and helpers available to kubectl.

Running

# assumes you have a working KUBECONFIG
$ go build cmd/kubectl-ns.go
# place the built binary somewhere in your PATH
$ cp ./kubectl-ns /usr/local/bin
# you can now begin using this plugin as a regular kubectl command:# update your configuration to point to "new-namespace"
$ kubectl ns new-namespace
# any kubectl commands you perform from now on will use "new-namespace"
$ kubectl get pod
NAME READY STATUS RESTARTS AGE
new-namespace-pod 1/1 Running 0 1h
# list all of the namespace in use by contexts in your KUBECONFIG
$ kubectl ns --list
# show the namespace that the currently set context in your KUBECONFIG points to
$ kubectl ns

Use Cases

This plugin can be used as a developer tool, in order to quickly view or change the current namespace that kubectl points to.

It can also be used as a means of showcasing usage of the cli-runtime set of utilities to aid in third-party plugin development.

Cleanup

You can "uninstall" this plugin from kubectl by simply removing it from your PATH:

$ rm /usr/local/bin/kubectl-ns

Compatibility

HEAD of this repository will match HEAD of k8s.io/apimachinery and k8s.io/client-go.

Where does it come from?

sample-cli-plugin is synced from https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/sample-cli-plugin. Code changes are made in that location, merged into k8s.io/kubernetes and later synced here.

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Sample kubectl plugin

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