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📖 Add documentation for release process (ionos-cloud#159)
**What is the purpose of this pull request/Why do we need it?** Add intermediate release docs for the current process. Also removes the kubebuilder release tools as they are not needed anymore **Checklist:** - [x] Documentation updated - [x] Includes [emojis](https://github.com/kubernetes-sigs/kubebuilder-release-tools?tab=readme-ov-file#kubebuilder-project-versioning)
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| # Release | ||
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| > [!NOTE] | ||
| > This document is based on the initial learnings from the release process and is therefore subject to change. | ||
| ## Preparing the release | ||
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| For each release, a milestone needs to be in place. All PRs that are part of the release need to be assigned to | ||
| the milestone. | ||
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| This will also make it easier to filter for the correct commits, that should be cherry-picked later. | ||
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| ### Create an issue | ||
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| To track the progress of the release, we need to create an issue. Make use of the `Release` issue template. | ||
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| ### Patch release | ||
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| A patch release can only include bug fixes, documentation updates, and other trivial changes. | ||
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| New features and breaking changes must be part of a minor release. | ||
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| ### Minor release | ||
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| A minor release includes all changes from the last minor version to the next one. | ||
| This also includes new features and breaking changes. | ||
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| The following tasks need to be done before creating a new release: | ||
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| - Update metadata & clusterctl-settings. | ||
| - Update version in e2e config. | ||
| - Update docs (compatibility table; usage etc). | ||
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| ### Milestones | ||
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| With `Milestones` we want to make it easier to track the progress of a release. | ||
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| ### Cherry-Picking | ||
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| > [!NOTE] | ||
| > As we do not yet have `Prow`, we need to do the cherry-picking manually. | ||
| > Refer to the [git cherry-pick docs](https://git-scm.com/docs/git-cherry-pick) | ||
| #### Patch release | ||
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| For each release, we need to cherry-pick all the relevant changes. For patch releases, we already | ||
| have a release branch in place. All changes, that should go into the next patch version, need to be merged into | ||
| the corresponding release branch. | ||
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| After this is done, we need to create a new tag for the release. | ||
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| #### Minor release | ||
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| A minor release requires the creation of a new release branch. We will include all changes from the mainline | ||
| into the release branch. This includes new features and breaking changes. | ||
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| In this case we do not have to `cherry-pick` the changes. | ||
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| ### Generate release notes | ||
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| Cluster API provides a tool to generate release notes. The tool can be found in the `hack/tools/release/notes` directory | ||
| within the Cluster API repository. | ||
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| An example for creating release notes with the tool could be: | ||
| ```bash | ||
| # make sure you are in the cluster-api repository | ||
| cd ../cluster-api | ||
| # run the release notes tool and provide correct Github repository | ||
| go run -tags=tools sigs.k8s.io/cluster-api/hack/tools/release/notes \ | ||
| --from tags/v0.Y.Z \ | ||
| --to tags/v0.X.0 \ | ||
| --branch release-0.X \ | ||
| --repository ionos-cloud/cluster-api-provider-ionoscloud | ||
| ``` | ||
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| The terminal output can then be copied into the draft release notes. There might be some manual work left to do. | ||
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