Skip to main content

Backups

Three things hold all state: the Postgres databases, the Nextcloud / MinIO object storage, and the k3s cluster config. Back up all three.

Databases​

Dump each app's Postgres database from its pod:

export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
kubectl -n mb-nextcloud exec deploy/nextcloud-postgresql -- \
  pg_dumpall -U postgres | gzip > nextcloud-$(date +%F).sql.gz

Repeat for other namespaces that own a database (mb-docs, mb-keycloak, …).

Files (MinIO / object storage)​

Mirror the Nextcloud bucket out with the MinIO client:

mc mirror minio/nextcloud /backup/nextcloud-data

Cluster state​

Back up /etc/rancher/k3s/ and the open-suite repo checkout (it holds the deploy scripts, patches, and overlays). With those plus the dumps above, a wiped box can be rebuilt by re-running deploy.sh and restoring data.

Schedule​

Run the dumps from cron daily and copy them off-box (e.g. to S3-compatible storage in the EU). Test a restore periodically.