Helm chart for Mastodon deployment in Kubernetes
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This is a Helm chart for installing Mastodon into a Kubernetes cluster. The basic usage is:
values.yaml
or create a separate yaml file for custom valueshelm dep install
helm install --namespace mastodon --create-namespace my-mastodon ./ -f path/to/additional/values.yaml
This chart is tested with k8s 1.21+ and helm 3.8.0+.
We have plans in the very near future to deprecate this chart in favor of a new git repo, which has proper helm repository support (e.g. helm repo add
), and will contain multiple charts, both for mastodon and for supplementary components that we make use of.
We still encourage suggestions and PRs to help make this chart better, and this repository will remain available after the new charts are ready to give users time to migrate. However, we will not be approving large PRs, or PRs that change fundamental chart functions, as those changes should be directed to the new charts.
Please see the pinned GitHub issue for more info & discussion.
The variables that must be configured are:
password and keys in the mastodon.secrets
, postgresql
, and redis
groups; if
left blank, some of those values will be autogenerated, but will not persist
across upgrades.
SMTP settings for your mailer in the mastodon.smtp
group.
If your PersistentVolumeClaim is ReadWriteOnce
and you're unable to use a S3-compatible service or
run a self-hosted compatible service like Minio
then you need to set the pod affinity so the web and sidekiq pods are scheduled to the same node.
Example configuration:
podAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: app.kubernetes.io/part-of
operator: In
values:
- rails
topologyKey: kubernetes.io/hostname
You can run admin CLI commands in the web deployment.
kubectl -n mastodon exec -it deployment/mastodon-web -- bash
tootctl accounts modify admin --reset-password
or
kubectl -n mastodon exec -it deployment/mastodon-web -- tootctl accounts modify admin --reset-password
Currently this chart does not support:
Because database migrations are managed as a Job separate from the Rails and Sidekiq deployments, it’s possible they will occur in the wrong order. After upgrading Mastodon versions, it may sometimes be necessary to manually delete the Rails and Sidekiq pods so that they are recreated against the latest migration.