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Install PostgreSQL Addon for Stash
Stash uses Function-Task model to backup databases. This Function-Task model enables Stash to extend its capability via addons. In order to backup PostgreSQL databases, you have to install PostgreSQL addon (stash-postgres) for Stash. This addon creates necessary Function and Task definitions to backup/restore PostgreSQL database.
You can install the addon either as a helm chart or you can create only the YAMLs of the respective resources.
Using Helm 3
Run the following script to install stash-postgres addon as a Helm chart using Helm 3.
curl -fsSL https://github.com/stashed/catalog/raw/v0.2.0/deploy/helm3.sh | bash -s -- --catalog=stash-postgres
Using Helm 2
Run the following script to install stash-postgres addon as a Helm chart using Helm 2.
curl -fsSL https://github.com/stashed/catalog/raw/v0.2.0/deploy/helm2.sh | bash -s -- --catalog=stash-postgres
Using YAML
Run the following script to install stash-postgres addon as Kubernetes YAMLs.
curl -fsSL https://github.com/stashed/catalog/raw/v0.2.0/deploy/script.sh | bash -s -- --catalog=stash-postgres
The above script uses Helm 3 for rendering the charts to generate the YAMLs.
Verify Installation
After installation is completed, this addon will create postgres-backup-* and postgres-restore-* Functions and Tasks for all supported PostgreSQL versions. To verify, run the following command:
$ kubectl get functions.stash.appscode.com
NAME AGE
postgres-backup-10.2 20s
postgres-backup-10.6 20s
postgres-backup-11.1 19s
postgres-backup-9.6 20s
postgres-restore-10.2 20s
postgres-restore-10.6 20s
postgres-restore-11.1 19s
postgres-restore-9.6 20s
postgres-backup-11.2 19s
postgres-restore-11.2 19s
pvc-backup 7h6m
pvc-restore 7h6m
update-status 7h6m
Also, verify that the Task have been created.
$ kubectl get tasks.stash.appscode.com
NAME AGE
postgres-backup-10.2 2m7s
postgres-backup-10.6 2m7s
postgres-backup-11.1 2m6s
postgres-backup-9.6 2m7s
postgres-restore-10.2 2m7s
postgres-restore-10.6 2m7s
postgres-restore-11.1 2m6s
postgres-restore-9.6 m7s
postgres-backup-11.2 2m6s
postgres-restore-11.2 2m6s
pvc-backup 7h7m
pvc-restore 7h7m
Now, Stash is ready to backup PostgreSQL databases.
Customizing Installation
In order to install Function and Task only for a specific PostgreSQL version, use --version flag to specify the desired database version.
curl -fsSL https://github.com/stashed/catalog/raw/v0.2.0/deploy/helm3.sh | bash -s -- --catalog=stash-postgres --version=11.2
The flowing flags are available for customizing PostgreSQL addon installation:
| Flag | Usage |
|---|---|
--version | Specify a specific version of a specific addon to install. Use it along with --catalog flag. |
--docker-registry | Specify the docker registry to use to pull respective addon images. Default Value: stashed. |
--image | Specify the name of the docker image to use for respective addons. |
--image-tag | Specify the tag of the docker image to use for respective addon. |
--pg-backup-args | Specify optional arguments to pass to pgdump command during backup. These arguments apply to all PostgreSQL instances in this cluster. To set arguments for a specific PostgreSQL database instance, set pgArgs parameter in spec.task.params field of the respective BackupConfiguration. |
--pg-restore-args | Specify optional arguments to pass to psql command during restore. These arguments apply to all PostgreSQL instances in this cluster. To set arguments for a specific PostgreSQL database instance, set pgArgs parameter in spec.task.params field of the respective RestoreSession. |