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Update Username Signed-off-by: pgumpoldsberger <60177408+pgumpoldsberger@users.noreply.github.com>
99 lines
3.5 KiB
Markdown
99 lines
3.5 KiB
Markdown
---
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title: Upgrade PostgreSQL on Kubernetes
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---
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## Preparation
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- `authentik-postgresql-0` is the Kubernetes Pod running PostgreSQL.
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### Prerequisites
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This migration requires some downtime, during which authentik must be stopped. To do this, run the following command:
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```shell
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kubectl scale deploy --replicas 0 authentik-server
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kubectl scale deploy --replicas 0 authentik-worker
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```
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### Dump the current database
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Run `kubectl exec -it authentik-postgresql-0 -- bash` to get a shell in the PostgreSQL pod.
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Run the following commands to dump the current data into a `.sql` file:
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```shell
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# This is the path where the PVC is mounted, so we'll place the dump here too
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cd /bitnami/postgresql/
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# Set the postgres password based on the `POSTGRES_POSTGRES_PASSWORD` environment variable
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export PGPASSWORD=$POSTGRES_POSTGRES_PASSWORD
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# Dump the authentik database into an sql file
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pg_dump -U $POSTGRES_USER $POSTGRES_DB > dump-11.sql
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```
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### Stop PostgreSQL and start the upgrade
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To upgrade, change the following entries in your `values.yaml` used to deploy authentik:
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```yaml
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postgresql:
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diagnosticMode:
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enabled: true
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image:
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tag: 15.2.0-debian-11-r26
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```
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Now run `helm upgrade --install authentik authentik/authentik -f values.yaml` to apply these changes. Depending on your configuration, you might have to repeat the steps from [Prerequisites](#prerequisites).
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After the upgrade is finished, you should have a new PostgreSQL pod running with the updated image.
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### Remove the old data
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Because the PVC mounted by the PostgreSQL pod still contains the old data, we need to remove/rename that data, so that PostgreSQL can initialize it with the new version.
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Run `kubectl exec -it authentik-postgresql-0 -- bash` to get a shell in the PostgreSQL pod.
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Run the following commands to move the old data:
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```shell
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# This is the path where the PVC is mounted
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cd /bitnami/postgresql/
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# Move Postgres' data folder to data-11, which is the version we're upgrading to.
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# The data folder can also be deleted; however it is recommended to rename it first
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# in case the upgrade fails.
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mv data data-11
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```
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### Restart PostgreSQL
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In the step [Stop PostgreSQL and start the upgrade](#stop-postgresql-and-start-the-upgrade), we enabled the _diagnostic mode_, which means the PostgreSQL pod is running, but the actual Postgres process isn't running. Now that we've removed the old data directory, we can disable the diagnostic mode.
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Once again, change the following entries in your `values.yaml` used to deploy authentik:
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```yaml
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postgresql:
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image:
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tag: 15.2.0-debian-11-r26
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```
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And once again run `helm upgrade --install authentik authentik/authentik -f values.yaml` to apply these changes. Depending on your configuration, you might have to repeat the steps from [Prerequisites](#prerequisites).
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After the PostgreSQL pod is running again, we need to restore the data from the dump we created above.
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Run `kubectl exec -it authentik-postgresql-0 -- bash` to get a shell in the PostgreSQL pod.
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Run the following commands to restore the data:
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```shell
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# This is the path where the PVC is mounted
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cd /bitnami/postgresql/
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# Set the Postgres password based on the `POSTGRES_POSTGRES_PASSWORD` environment variable.
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export PGPASSWORD=$POSTGRES_POSTGRES_PASSWORD
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psql -U $POSTGRES_USER $POSTGRES_DB < dump-11.sql
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```
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After the last command finishes, all of the data is restored, and you can restart authentik.
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### Restarting authentik
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Run `helm upgrade --install authentik authentik/authentik -f values.yaml` once again, which will restart your authentik server and worker containers.
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