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9173e079ae
This PR adds an Alpine package registry. You can follow [this tutorial](https://wiki.alpinelinux.org/wiki/Creating_an_Alpine_package) to build a *.apk package for testing. This functionality is similar to the Debian registry (#22854) and therefore shares some methods. I marked this PR as blocked because it should be merged after #22854.  --------- Co-authored-by: techknowlogick <techknowlogick@gitea.io> Co-authored-by: silverwind <me@silverwind.io> Co-authored-by: Giteabot <teabot@gitea.io>
86 lines
4.1 KiB
Markdown
86 lines
4.1 KiB
Markdown
---
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date: "2022-11-01T00:00:00+00:00"
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title: "Storage"
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slug: "storage"
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weight: 5
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draft: false
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toc: false
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menu:
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sidebar:
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parent: "packages"
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name: "Storage"
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weight: 2
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identifier: "storage"
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---
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# Storage
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This document describes the storage of the package registry and how it can be managed.
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**Table of Contents**
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{{< toc >}}
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## Deduplication
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The package registry has a build-in deduplication of uploaded blobs.
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If two identical files are uploaded only one blob is saved on the filesystem.
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This ensures no space is wasted for duplicated files.
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If two packages are uploaded with identical files, both packages will display the same size but on the filesystem they require only half of the size.
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Whenever a package gets deleted only the references to the underlaying blobs are removed.
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The blobs get not removed at this moment, so they still require space on the filesystem.
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When a new package gets uploaded the existing blobs may get referenced again.
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These unreferenced blobs get deleted by a [clean up job]({{< relref "doc/administration/config-cheat-sheet.en-us.md#cron---cleanup-expired-packages-croncleanup_packages" >}}).
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The config setting `OLDER_THAN` configures how long unreferenced blobs are kept before they get deleted.
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## Cleanup Rules
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Package registries can become large over time without cleanup.
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It's recommended to delete unnecessary packages and set up cleanup rules to automatically manage the package registry usage.
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Every package owner (user or organization) manages the cleanup rules which are applied to their packages.
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|Setting|Description|
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|Enabled|Turn the cleanup rule on or off.|
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|Type|Every rule manages a specific package type.|
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|Apply pattern to full package name|If enabled, the patterns below are applied to the full package name (`package/version`). Otherwise only the version (`version`) is used.|
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|Keep the most recent|How many versions to *always* keep for each package.|
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|Keep versions matching|The regex pattern that determines which versions to keep. An empty pattern keeps no version while `.+` keeps all versions. The container registry will always keep the `latest` version even if not configured.|
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|Remove versions older than|Remove only versions older than the selected days.|
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|Remove versions matching|The regex pattern that determines which versions to remove. An empty pattern or `.+` leads to the removal of every package if no other setting tells otherwise.|
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Every cleanup rule can show a preview of the affected packages.
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This can be used to check if the cleanup rules is proper configured.
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### Regex examples
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Regex patterns are automatically surrounded with `\A` and `\z` anchors.
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Do not include any `\A`, `\z`, `^` or `$` token in the regex patterns as they are not necessary.
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The patterns are case-insensitive which matches the behaviour of the package registry in Gitea.
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|Pattern|Description|
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|-|-|
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|`.*`|Match every possible version.|
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|`v.+`|Match versions that start with `v`.|
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|`release`|Match only the version `release`.|
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|`release.*`|Match versions that are either named or start with `release`.|
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|`.+-temp-.+`|Match versions that contain `-temp-`.|
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|`v.+\|release`|Match versions that either start with `v` or are named `release`.|
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|`package/v.+\|other/release`|Match versions of the package `package` that start with `v` or the version `release` of the package `other`. This needs the setting *Apply pattern to full package name* enabled.|
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### How the cleanup rules work
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The cleanup rules are part of the [clean up job]({{< relref "doc/administration/config-cheat-sheet.en-us.md#cron---cleanup-expired-packages-croncleanup_packages" >}}) and run periodically.
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The cleanup rule:
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1. Collects all packages of the package type for the owners registry.
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1. For every package it collects all versions.
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1. Excludes from the list the # versions based on the *Keep the most recent* value.
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1. Excludes from the list any versions matching the *Keep versions matching* value.
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1. Excludes from the list the versions more recent than the *Remove versions older than* value.
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1. Excludes from the list any versions not matching the *Remove versions matching* value.
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1. Deletes the remaining versions.
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