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Holter: Operational Sovereignty Through Continuous Observability

Your infrastructure is under constant pressure. Every second of downtime, every expired SSL certificate, and every undetected performance degradation costs money, reputation, and peace of mind. Most teams only realize there is a problem after the damage is done.

Holter was designed to eliminate this blind spot. By providing high-precision monitoring and automated security checks, Holter ensures you are the first to know when something goes wrong—or better yet, when something is about to go wrong.

Experience absolute control over your digital assets. With automated daily metrics, preventive SSL expiration alerts, and a core engine built for extreme concurrency on the Erlang VM, Holter transforms reactive firefighting into proactive operational sovereignty.

Quick Start

Prerequisites

  • Docker and Docker Compose

Development Environment

To initialize and start the system:

  1. Setup Dependencies:

    docker compose run --rm holter mix setup

  2. Start the Server:

    docker compose up

  3. Access the Application: Visit localhost:4000 in your browser.

Engineering Standards

This project is built under the Eiseron Engineering Constitution:

  • Vertical Development: Full-stack features driven by Phoenix LiveView.
  • Clean Code: Strict adherence to Uncle Bob's principles—self-documenting, small, and focused logic.
  • Domain-Driven Design: Strict bounded contexts and modular monolith architecture.
  • Operational Sovereignty: Fully containerized infrastructure with no external dependencies for core functionality.

For detailed development guidelines, refer to AGENTS.md and agents/project_specializations.md.

Documentation

User documentation is available in docs/ for each supported language:

LanguageEntry Point
Englishdocs/en/index.md
Português (BR)docs/pt_BR/index.md

Start with Getting Started (EN) or Primeiros Passos (PT_BR).

The REST API specification is auto-generated during mix precommit and lives at docs/api/monitoring.yml.

Learn More

License and Trademarks

Holter is released under the Functional Source License, Version 1.1, with Apache License 2.0 Future License (FSL-1.1-ALv2). See LICENSE.md for the full text and NOTICE for attribution.

The FSL permits any Permitted Purpose — including self-hosting for your own use and use in connection with professional services you provide to others — and prohibits a Competing Use, meaning making the Software available as a commercial product or service that competes with Eiseron's offerings. Each released version converts to the Apache License, Version 2.0 two years after publication.

The names Eiseron and Holter, the Eiseron logotype, and the associated visual identity are trademarks of Eiseron. The FSL does not grant rights to use these trademarks. See TRADEMARKS.md for the full trademark policy and acceptable uses.

About

Digital Asset Integrity Assurance Platform.

holter.dev

Topics

ash-frameworkelixirmonitoringphoenixsecurity

Resources

Readme
License

Contributing

Contributing
Activity
Custom properties

Stars

1 star

Watchers

0 watching

Forks

0 forks
Report repository

Releases

Packages

Used by

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n 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;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
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Holter: Operational Sovereignty Through Continuous Observability
Your infrastructure is under constant pressure. Every second of downtime, every expired SSL certificate, and every undetected performance degradation costs money, reputation, and peace of mind. Most teams only realize there is a problem after the damage is done.
Holter was designed to eliminate this blind spot. By providing high-precision monitoring and automated security checks, Holter ensures you are the first to know when something goes wrong—or better yet, when something is about to go wrong.
Experience absolute control over your digital assets. With automated daily metrics, preventive SSL expiration alerts, and a core engine built for extreme concurrency on the Erlang VM, Holter transforms reactive firefighting into proactive operational sovereignty.
Quick Start
Prerequisites
  • Docker and Docker Compose
Development Environment
To initialize and start the system:
  1. Setup Dependencies:
    docker compose run --rm holter mix setup
  2. Start the Server:
    docker compose up
  3. Access the Application:
Visit localhost:4000 in your browser.
Engineering Standards
This project is built under the Eiseron Engineering Constitution:
  • Vertical Development: Full-stack features driven by Phoenix LiveView.
  • Clean Code: Strict adherence to Uncle Bob's principles—self-documenting, small, and focused logic.
  • Domain-Driven Design: Strict bounded contexts and modular monolith architecture.
  • Operational Sovereignty: Fully containerized infrastructure with no external dependencies for core functionality.
For detailed development guidelines, refer to AGENTS.md and agents/project_specializations.md.
Documentation
User documentation is available in docs/ for each supported language:
LanguageEntry Point
Englishdocs/en/index.md
Português (BR)docs/pt_BR/index.md
Start with Getting Started (EN) or Primeiros Passos (PT_BR).
The REST API specification is auto-generated during mix precommit and lives at docs/api/monitoring.yml.
Learn More
License and Trademarks
Holter is released under the Functional Source License, Version 1.1, with Apache License 2.0 Future License (FSL-1.1-ALv2). See LICENSE.md for the full text and NOTICE for attribution.
The FSL permits any Permitted Purpose — including self-hosting for your own use and use in connection with professional services you provide to others — and prohibits a Competing Use, meaning making the Software available as a commercial product or service that competes with Eiseron's offerings. Each released version converts to the Apache License, Version 2.0 two years after publication.
The names Eiseron and Holter, the Eiseron logotype, and the associated visual identity are trademarks of Eiseron. The FSL does not grant rights to use these trademarks. See TRADEMARKS.md for the full trademark policy and acceptable uses.
About
Digital Asset Integrity Assurance Platform.
holter.dev
Topics
ash-frameworkelixirmonitoringphoenixsecurity
Resources
Readme
License
Contributing
Contributing
Activity
Custom properties
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

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

Skip to content
BranchesTags
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Holter: Operational Sovereignty Through Continuous Observability
Your infrastructure is under constant pressure. Every second of downtime, every expired SSL certificate, and every undetected performance degradation costs money, reputation, and peace of mind. Most teams only realize there is a problem after the damage is done.
Holter was designed to eliminate this blind spot. By providing high-precision monitoring and automated security checks, Holter ensures you are the first to know when something goes wrong—or better yet, when something is about to go wrong.
Experience absolute control over your digital assets. With automated daily metrics, preventive SSL expiration alerts, and a core engine built for extreme concurrency on the Erlang VM, Holter transforms reactive firefighting into proactive operational sovereignty.
Quick Start
Prerequisites
  • Docker and Docker Compose
Development Environment
To initialize and start the system:
  1. Setup Dependencies:
    docker compose run --rm holter mix setup
  2. Start the Server:
    docker compose up
  3. Access the Application:
Visit localhost:4000 in your browser.
Engineering Standards
This project is built under the Eiseron Engineering Constitution:
  • Vertical Development: Full-stack features driven by Phoenix LiveView.
  • Clean Code: Strict adherence to Uncle Bob's principles—self-documenting, small, and focused logic.
  • Domain-Driven Design: Strict bounded contexts and modular monolith architecture.
  • Operational Sovereignty: Fully containerized infrastructure with no external dependencies for core functionality.
For detailed development guidelines, refer to AGENTS.md and agents/project_specializations.md.
Documentation
User documentation is available in docs/ for each supported language:
LanguageEntry Point
Englishdocs/en/index.md
Português (BR)docs/pt_BR/index.md
Start with Getting Started (EN) or Primeiros Passos (PT_BR).
The REST API specification is auto-generated during mix precommit and lives at docs/api/monitoring.yml.
Learn More
License and Trademarks
Holter is released under the Functional Source License, Version 1.1, with Apache License 2.0 Future License (FSL-1.1-ALv2). See LICENSE.md for the full text and NOTICE for attribution.
The FSL permits any Permitted Purpose — including self-hosting for your own use and use in connection with professional services you provide to others — and prohibits a Competing Use, meaning making the Software available as a commercial product or service that competes with Eiseron's offerings. Each released version converts to the Apache License, Version 2.0 two years after publication.
The names Eiseron and Holter, the Eiseron logotype, and the associated visual identity are trademarks of Eiseron. The FSL does not grant rights to use these trademarks. See TRADEMARKS.md for the full trademark policy and acceptable uses.
About
Digital Asset Integrity Assurance Platform.
holter.dev
Topics
ash-frameworkelixirmonitoringphoenixsecurity
Resources
Readme
License
Contributing
Contributing
Activity
Custom properties
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

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

Skip to content
BranchesTags
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Holter: Operational Sovereignty Through Continuous Observability
Your infrastructure is under constant pressure. Every second of downtime, every expired SSL certificate, and every undetected performance degradation costs money, reputation, and peace of mind. Most teams only realize there is a problem after the damage is done.
Holter was designed to eliminate this blind spot. By providing high-precision monitoring and automated security checks, Holter ensures you are the first to know when something goes wrong—or better yet, when something is about to go wrong.
Experience absolute control over your digital assets. With automated daily metrics, preventive SSL expiration alerts, and a core engine built for extreme concurrency on the Erlang VM, Holter transforms reactive firefighting into proactive operational sovereignty.
Quick Start
Prerequisites
  • Docker and Docker Compose
Development Environment
To initialize and start the system:
  1. Setup Dependencies:
    docker compose run --rm holter mix setup
  2. Start the Server:
    docker compose up
  3. Access the Application:
Visit localhost:4000 in your browser.
Engineering Standards
This project is built under the Eiseron Engineering Constitution:
  • Vertical Development: Full-stack features driven by Phoenix LiveView.
  • Clean Code: Strict adherence to Uncle Bob's principles—self-documenting, small, and focused logic.
  • Domain-Driven Design: Strict bounded contexts and modular monolith architecture.
  • Operational Sovereignty: Fully containerized infrastructure with no external dependencies for core functionality.
For detailed development guidelines, refer to AGENTS.md and agents/project_specializations.md.
Documentation
User documentation is available in docs/ for each supported language:
LanguageEntry Point
Englishdocs/en/index.md
Português (BR)docs/pt_BR/index.md
Start with Getting Started (EN) or Primeiros Passos (PT_BR).
The REST API specification is auto-generated during mix precommit and lives at docs/api/monitoring.yml.
Learn More
License and Trademarks
Holter is released under the Functional Source License, Version 1.1, with Apache License 2.0 Future License (FSL-1.1-ALv2). See LICENSE.md for the full text and NOTICE for attribution.
The FSL permits any Permitted Purpose — including self-hosting for your own use and use in connection with professional services you provide to others — and prohibits a Competing Use, meaning making the Software available as a commercial product or service that competes with Eiseron's offerings. Each released version converts to the Apache License, Version 2.0 two years after publication.
The names Eiseron and Holter, the Eiseron logotype, and the associated visual identity are trademarks of Eiseron. The FSL does not grant rights to use these trademarks. See TRADEMARKS.md for the full trademark policy and acceptable uses.
About
Digital Asset Integrity Assurance Platform.
holter.dev
Topics
ash-frameworkelixirmonitoringphoenixsecurity
Resources
Readme
License
Contributing
Contributing
Activity
Custom properties
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

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

Skip to content
BranchesTags
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Holter: Operational Sovereignty Through Continuous Observability
Your infrastructure is under constant pressure. Every second of downtime, every expired SSL certificate, and every undetected performance degradation costs money, reputation, and peace of mind. Most teams only realize there is a problem after the damage is done.
Holter was designed to eliminate this blind spot. By providing high-precision monitoring and automated security checks, Holter ensures you are the first to know when something goes wrong—or better yet, when something is about to go wrong.
Experience absolute control over your digital assets. With automated daily metrics, preventive SSL expiration alerts, and a core engine built for extreme concurrency on the Erlang VM, Holter transforms reactive firefighting into proactive operational sovereignty.
Quick Start
Prerequisites
  • Docker and Docker Compose
Development Environment
To initialize and start the system:
  1. Setup Dependencies:
    docker compose run --rm holter mix setup
  2. Start the Server:
    docker compose up
  3. Access the Application:
Visit localhost:4000 in your browser.
Engineering Standards
This project is built under the Eiseron Engineering Constitution:
  • Vertical Development: Full-stack features driven by Phoenix LiveView.
  • Clean Code: Strict adherence to Uncle Bob's principles—self-documenting, small, and focused logic.
  • Domain-Driven Design: Strict bounded contexts and modular monolith architecture.
  • Operational Sovereignty: Fully containerized infrastructure with no external dependencies for core functionality.
For detailed development guidelines, refer to AGENTS.md and agents/project_specializations.md.
Documentation
User documentation is available in docs/ for each supported language:
LanguageEntry Point
Englishdocs/en/index.md
Português (BR)docs/pt_BR/index.md
Start with Getting Started (EN) or Primeiros Passos (PT_BR).
The REST API specification is auto-generated during mix precommit and lives at docs/api/monitoring.yml.
Learn More
License and Trademarks
Holter is released under the Functional Source License, Version 1.1, with Apache License 2.0 Future License (FSL-1.1-ALv2). See LICENSE.md for the full text and NOTICE for attribution.
The FSL permits any Permitted Purpose — including self-hosting for your own use and use in connection with professional services you provide to others — and prohibits a Competing Use, meaning making the Software available as a commercial product or service that competes with Eiseron's offerings. Each released version converts to the Apache License, Version 2.0 two years after publication.
The names Eiseron and Holter, the Eiseron logotype, and the associated visual identity are trademarks of Eiseron. The FSL does not grant rights to use these trademarks. See TRADEMARKS.md for the full trademark policy and acceptable uses.
About
Digital Asset Integrity Assurance Platform.
holter.dev
Topics
ash-frameworkelixirmonitoringphoenixsecurity
Resources
Readme
License
Contributing
Contributing
Activity
Custom properties
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

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

Skip to content
BranchesTags
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Holter: Operational Sovereignty Through Continuous Observability
Your infrastructure is under constant pressure. Every second of downtime, every expired SSL certificate, and every undetected performance degradation costs money, reputation, and peace of mind. Most teams only realize there is a problem after the damage is done.
Holter was designed to eliminate this blind spot. By providing high-precision monitoring and automated security checks, Holter ensures you are the first to know when something goes wrong—or better yet, when something is about to go wrong.
Experience absolute control over your digital assets. With automated daily metrics, preventive SSL expiration alerts, and a core engine built for extreme concurrency on the Erlang VM, Holter transforms reactive firefighting into proactive operational sovereignty.
Quick Start
Prerequisites
  • Docker and Docker Compose
Development Environment
To initialize and start the system:
  1. Setup Dependencies:
    docker compose run --rm holter mix setup
  2. Start the Server:
    docker compose up
  3. Access the Application:
Visit localhost:4000 in your browser.
Engineering Standards
This project is built under the Eiseron Engineering Constitution:
  • Vertical Development: Full-stack features driven by Phoenix LiveView.
  • Clean Code: Strict adherence to Uncle Bob's principles—self-documenting, small, and focused logic.
  • Domain-Driven Design: Strict bounded contexts and modular monolith architecture.
  • Operational Sovereignty: Fully containerized infrastructure with no external dependencies for core functionality.
For detailed development guidelines, refer to AGENTS.md and agents/project_specializations.md.
Documentation
User documentation is available in docs/ for each supported language:
LanguageEntry Point
Englishdocs/en/index.md
Português (BR)docs/pt_BR/index.md
Start with Getting Started (EN) or Primeiros Passos (PT_BR).
The REST API specification is auto-generated during mix precommit and lives at docs/api/monitoring.yml.
Learn More
License and Trademarks
Holter is released under the Functional Source License, Version 1.1, with Apache License 2.0 Future License (FSL-1.1-ALv2). See LICENSE.md for the full text and NOTICE for attribution.
The FSL permits any Permitted Purpose — including self-hosting for your own use and use in connection with professional services you provide to others — and prohibits a Competing Use, meaning making the Software available as a commercial product or service that competes with Eiseron's offerings. Each released version converts to the Apache License, Version 2.0 two years after publication.
The names Eiseron and Holter, the Eiseron logotype, and the associated visual identity are trademarks of Eiseron. The FSL does not grant rights to use these trademarks. See TRADEMARKS.md for the full trademark policy and acceptable uses.
About
Digital Asset Integrity Assurance Platform.
holter.dev
Topics
ash-frameworkelixirmonitoringphoenixsecurity
Resources
Readme
License
Contributing
Contributing
Activity
Custom properties
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
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Holter: Operational Sovereignty Through Continuous Observability
Your infrastructure is under constant pressure. Every second of downtime, every expired SSL certificate, and every undetected performance degradation costs money, reputation, and peace of mind. Most teams only realize there is a problem after the damage is done.
Holter was designed to eliminate this blind spot. By providing high-precision monitoring and automated security checks, Holter ensures you are the first to know when something goes wrong—or better yet, when something is about to go wrong.
Experience absolute control over your digital assets. With automated daily metrics, preventive SSL expiration alerts, and a core engine built for extreme concurrency on the Erlang VM, Holter transforms reactive firefighting into proactive operational sovereignty.
Quick Start
Prerequisites
  • Docker and Docker Compose
Development Environment
To initialize and start the system:
  1. Setup Dependencies:
    docker compose run --rm holter mix setup
  2. Start the Server:
    docker compose up
  3. Access the Application:
Visit localhost:4000 in your browser.
Engineering Standards
This project is built under the Eiseron Engineering Constitution:
  • Vertical Development: Full-stack features driven by Phoenix LiveView.
  • Clean Code: Strict adherence to Uncle Bob's principles—self-documenting, small, and focused logic.
  • Domain-Driven Design: Strict bounded contexts and modular monolith architecture.
  • Operational Sovereignty: Fully containerized infrastructure with no external dependencies for core functionality.
For detailed development guidelines, refer to AGENTS.md and agents/project_specializations.md.
Documentation
User documentation is available in docs/ for each supported language:
LanguageEntry Point
Englishdocs/en/index.md
Português (BR)docs/pt_BR/index.md
Start with Getting Started (EN) or Primeiros Passos (PT_BR).
The REST API specification is auto-generated during mix precommit and lives at docs/api/monitoring.yml.
Learn More
License and Trademarks
Holter is released under the Functional Source License, Version 1.1, with Apache License 2.0 Future License (FSL-1.1-ALv2). See LICENSE.md for the full text and NOTICE for attribution.
The FSL permits any Permitted Purpose — including self-hosting for your own use and use in connection with professional services you provide to others — and prohibits a Competing Use, meaning making the Software available as a commercial product or service that competes with Eiseron's offerings. Each released version converts to the Apache License, Version 2.0 two years after publication.
The names Eiseron and Holter, the Eiseron logotype, and the associated visual identity are trademarks of Eiseron. The FSL does not grant rights to use these trademarks. See TRADEMARKS.md for the full trademark policy and acceptable uses.
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Holter: Operational Sovereignty Through Continuous Observability
Your infrastructure is under constant pressure. Every second of downtime, every expired SSL certificate, and every undetected performance degradation costs money, reputation, and peace of mind. Most teams only realize there is a problem after the damage is done.
Holter was designed to eliminate this blind spot. By providing high-precision monitoring and automated security checks, Holter ensures you are the first to know when something goes wrong—or better yet, when something is about to go wrong.
Experience absolute control over your digital assets. With automated daily metrics, preventive SSL expiration alerts, and a core engine built for extreme concurrency on the Erlang VM, Holter transforms reactive firefighting into proactive operational sovereignty.
Quick Start
Prerequisites
  • Docker and Docker Compose
Development Environment
To initialize and start the system:
  1. Setup Dependencies:
    docker compose run --rm holter mix setup
  2. Start the Server:
    docker compose up
  3. Access the Application:
Visit localhost:4000 in your browser.
Engineering Standards
This project is built under the Eiseron Engineering Constitution:
  • Vertical Development: Full-stack features driven by Phoenix LiveView.
  • Clean Code: Strict adherence to Uncle Bob's principles—self-documenting, small, and focused logic.
  • Domain-Driven Design: Strict bounded contexts and modular monolith architecture.
  • Operational Sovereignty: Fully containerized infrastructure with no external dependencies for core functionality.
For detailed development guidelines, refer to AGENTS.md and agents/project_specializations.md.
Documentation
User documentation is available in docs/ for each supported language:
LanguageEntry Point
Englishdocs/en/index.md
Português (BR)docs/pt_BR/index.md
Start with Getting Started (EN) or Primeiros Passos (PT_BR).
The REST API specification is auto-generated during mix precommit and lives at docs/api/monitoring.yml.
Learn More
License and Trademarks
Holter is released under the Functional Source License, Version 1.1, with Apache License 2.0 Future License (FSL-1.1-ALv2). See LICENSE.md for the full text and NOTICE for attribution.
The FSL permits any Permitted Purpose — including self-hosting for your own use and use in connection with professional services you provide to others — and prohibits a Competing Use, meaning making the Software available as a commercial product or service that competes with Eiseron's offerings. Each released version converts to the Apache License, Version 2.0 two years after publication.
The names Eiseron and Holter, the Eiseron logotype, and the associated visual identity are trademarks of Eiseron. The FSL does not grant rights to use these trademarks. See TRADEMARKS.md for the full trademark policy and acceptable uses.
About
Digital Asset Integrity Assurance Platform.
holter.dev
Topics
ash-frameworkelixirmonitoringphoenixsecurity
Resources
Readme
License
Contributing
Contributing
Activity
Custom properties
Stars
1 star
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages