This section describes the release cadence and all release related processes.
Cilium schedules a minor release every 6 weeks. Each minor release is performed
by incrementing the
Y in the version format
X.Y.Z. The group of
committers can decide to increment
X instead to mark major milestones in
Y is reset to 0.
The committers can nominate PRs merged into master as required for backport
into the stable release branches. Upon necessity, stable releases are published
with the version
X.Y.Z+1. Stable releases are regularly released in high
frequency or on demand to address major incidents.
In order to guarantee stable production usage while maintaining a high release cadence, the following stable releases will be maintained:
- Stable backports into the last two releases
- LTS release for extended long term backport coverage
Backport criteria for X.Y.Z+n¶
Criteria for the inclusion into latest stable release branch, i.e. what goes
v1.2.0 has been released:
- All bugfixes
Backport criteria for X.Y-1.Z¶
Criteria for the inclusion into the stable release branch of the previous
release, i.e. what goes into
v1.2.0 has been released:
- Security relevant fixes
- Major bugfixes relevant to the correct operation of Cilium
The group of committers nominates a release to be a long term stable release. Such releases are guaranteed to receive backports for major and security relevant bugfixes. LTS releases will be declared end of life after 6 months. The group of committers will nominate and start supporting a new LTS release before the current LTS expires. If for some reason, no release can be declared LTS before the current LTS release expires, the current LTS lifetime will be extended.
Given the current 6 weeks release cadence, the development teams will aim at declaring every 3rd release to be an LTS to guarantee enough time overlap between LTS release.
Current LTS releases¶
|Release||Original Release Date||Scheduled End of Life|
Generic Release Process¶
This process applies to all releases other than minor releases, this includes:
- Stable releases
- Release candidates
If you intent to release a new minor release, see the Minor Release Process section instead.
The following commands have been validated when ran in the VM used in the Cilium development process. See Setting up the development environment for detailed instructions about setting up said VM.
Ensure that the necessary backports have been completed and merged. See Backporting process.
Checkout the desired stable branch and pull it:
git checkout v1.0; git pull
Create a branch for the release pull request:
git checkout -b pr/prepare-v1.0.3
VERSIONfile to represent
If this is the first release after creating a new release branch. Adjust the image pull policy for all
Update the image tag versions in the examples:
make -C install/kubernetes clean all
Check to see if the
AUTHORSfile has any formatting errors (for instance, indentation mismatches) as well as duplicate contributor names, and correct them accordingly.
Generate the release notes by running the instructions provided in github.com/cilium/release
Add the generated release notes in the
Add all modified files using
git addand create a pull request with the title
Prepare for release v1.0.3. Add the backport label to the PR which corresponds to the branch for which the release is being performed, e.g.
Make sure to create the PR against the desired stable branch. In this case
Follow standard procedures to get the aforementioned PR merged into the desired stable branch. See Submitting a pull request for more information about this process.
Checkout out the stable branch and pull your merged changes:
git checkout v1.0; git pull
Create release tags:
git tag -a v1.0.3 -m 'Release v1.0.3' git tag -a 1.0.3 -m 'Release 1.0.3'
There are two tags that correspond to the same release because GitHub recommends using
vx.y.zfor release version formatting, and ReadTheDocs, which hosts the Cilium documentation, requires the version to be in format
x.y.zFor more information about how ReadTheDocs does versioning, you can read their Versions Documentation.
Build the binaries and push it to the release bucket:
DOMAIN=releases.cilium.io ./contrib/release/uploadrev v1.0.3
This step will print a markdown snippet which you will need when crafting the GitHub release so make sure to keep it handy.
Build the container images and push them
DOCKER_IMAGE_TAG=v1.0.3 make docker-image docker push cilium/cilium:v1.0.3
Push the git release tag
git push --tags
- Choose the correct target branch, e.g.
- Choose the correct target tag, e.g.
- Check the
This is a pre-releasebox if you are releasing a release candidate.
- Fill in the release description with the output generated by github.com/cilium/release
- Choose the correct target branch, e.g.
Announce the release in the
#generalchannel on Slack
Bump the version of Cilium used in the Cilium upgrade tests to use the new release
Please reach out on the
#developmentchannel on Slack for assistance with this task.
Update the external tools and guides to point to the released Cilium version:
Minor Release Process¶
On Freeze date¶
Fork a new release branch from master:
git checkout master; git pull git checkout -b v1.2 git push
Protect the branch using the GitHub UI to disallow direct push and require merging via PRs with proper reviews.
Replace the contents of the
CODEOWNERSfile with the following to reduce code reviews to essential approvals:
* @cilium/janitors api/ @cilium/api pkg/apisocket/ @cilium/api pkg/monitor/payload @cilium/api pkg/policy/api/ @cilium/api pkg/proxy/accesslog @cilium/api
Commit changes, open a pull request against the new
v1.2branch, and get the pull request merged
git checkout -b pr/prepare-v1.2 git add [...] git commit git push
Follow the Generic Release Process to release
Create the following GitHub labels:
Prepare the master branch for the next development cycle:
git checkout master; git pull
VERSIONfile to contain
git addand create & merge a PR titled
Prepare for 1.3.0 development.
- Update the release branch on
Jenkins to be tested on every change and Nightly.
(Only 1.0 minor releases) Tag newest 1.0.x Docker image as
v1.0-stableand push it to Docker Hub. This will ensure that Kops uses latest 1.0 release by default.
Cilium PRs that are marked with the label
needs-backport/X.Y need to be
backported to the stable branch
X.Y. The following steps summarize
the process for backporting these PRs.
Make sure the Github labels are up-to-date, as this process will deal with all commits from PRs that have the
needs-backport/X.Ylabel set (for a stable release version X.Y). If any PRs contain labels such as
backport-pending/X.Y, ensure that the backport for that PR have been merged and if so, change the label to
The scripts referred to below need to be run in Linux, they do not work on OSX. You can use the cilium dev VM for this, but you need to configure git to have your name and email address to be used in the commit messages:
$ git config --global user.name "John Doe" $ git config --global user.email [email protected]
Make sure you have your a GitHub developer access token available. For details, see contrib/backporting/README.md
Fetch the repo, e.g.,
Check a new branch for your backports based on the stable branch for that version, e.g.,
git checkout -b pr/v1.0-backport-YY-MM-DD origin/v1.0
check-stablescript, referring to your Github access token, this will list the commits that need backporting, from the newest to oldest:
$ GITHUB_TOKEN=xxx contrib/backporting/check-stable 1.0
contrib/backporting/check-stableaccepts a second argument to specify a path to write a nicely-formatted pull request message to. This can be used alongside Github command-line tools to send the pull request from the command line in steps 9-10 via
gh pull-request -b vX.Y -l backport/vX.Y -F <path>.
Cherry-pick the commits using the master git SHAs listed, starting from the oldest (bottom), working your way up and fixing any merge conflicts as they appear. Note that for PRs that have multiple commits you will want to check that you are cherry-picking oldest commits first. The
cherry-pickscript accepts multiple arguments, in which case it will attempt to apply each commit in the order specified on the command line until one cherry pick fails or every commit is cherry-picked.
$ contrib/backporting/cherry-pick <oldest-commit-sha> ... $ contrib/backporting/cherry-pick <newest-commit-sha>
Push your backports branch to cilium repo, e.g.,
git push -u origin pr/v1.0-backports-YY-MM-DD
In Github, create a new PR from your branch towards the feature branch you are backporting to. Note that by default Github creates PRs against the master branch, so you will need to change it.
Label the new backport PR with the backport label for the stable branch such as
backport/X.Yso that it is easy to find backport PRs later.
Mark all PRs you backported with the backport pending label
backport-pending/X.Yand clear the
needs-backport/vX.Ylabel. This can be via the GitHub interface, or using the backport script
# Set PR 1234's v1.0 backporting labels to pending $ contrib/backporting/set-labels.py 1234 pending 1.0
contrib/backporting/set-labels.pyrequires Python 3 and PyGithub installed.
After the backport PR is merged, mark all backported PRs with
backport-done/X.Ylabel and clear the
# Set PR 1234's v1.0 backporting labels to done contrib/backporting/set-labels.py 1234 done 1.0.