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---
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title: "Versioning Policy"
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description: "The Authelia Versioning Policy which is important reading for administrators"
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date: 2022-12-21T20:48:14+11:00
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draft: false
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images: []
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aliases:
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- /versioning-policy
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- /versioning
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---
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The __Authelia__ team aims to abide by the [Semantic Versioning 2.0.0](https://semver.org/spec/v2.0.0.html) policy. This
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means that we use the format `<major>.<minor>.<patch>` for our version numbers, where a change to `major` denotes a
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breaking change which will likely require user interaction to upgrade, `minor` which denotes a new feature, and `patch`
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denotes a fix.
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It is therefore recommended users do not automatically upgrade the `minor` version without reading the patch notes, and
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it's critically important users do not upgrade the `major` version without reading the patch notes. You should pin your
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version to `4.37` for example to prevent automatic upgrades of the `minor` version, or pin your version to `4` to
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prevent automatic upgrade of the `major` version.
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We generally do not recommend automated upgrades of critical systems but instead recommend ensuring you are notified an
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upgrade exists.
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2023-01-05 07:51:49 +00:00
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## Major Version Zero
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A major version of `v0.x.x` indicates as per the [Semantic Versioning 2.0.0](https://semver.org/spec/v2.0.0.html) policy
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that there may be breaking changes without warning. Some [components](#components) will be released under this version
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while they're in early development.
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## Components
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Several components may exist at various times. We aim to abide by this policy for all components related to Authelia.
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It is important to note that each component has its own version, for example the primary Authelia binary version may be
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v4.40.0 but another component such as the [Helm Chart](https://charts.authelia.com) version may be v0.9.0.
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This means that a breaking change may occur to one but not the other as these components do not share a version.
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## Exceptions
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There are exceptions to this versioning policy.
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### Advanced Customizations
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Some advanced customizations are not guaranteed by the versioning policy. These features require the administrator to
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ensure they keep up to date with the changes relevant to their version. While the customizations exist as a feature we
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cannot allow these customizations to hinder the development process.
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Notable Advanced Customizations:
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- Templates:
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- Email
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- Content Security Policy header
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- Localization / Internationalization Assets
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### Breaking Changes
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All features which are marked as:
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- beta
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- experimental
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Notable examples:
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- OpenID Connect 1.0
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- File Filters
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The reasoning is as we develop these features there may be mistakes and we may need to make a change that would normally
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be considered a breaking change. As these features graduate from their status to generally available they will move into
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our standard versioning policy and lose their exception status.
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