Storage

This operator gives you flexibility to define the storage that will back the /var/lib/mysql data directory mounted by MariaDB.

Configuration

The simplest way to configure storage for your MariaDB is:

This will make use of the default StorageClass available in your cluster, but you can also provide a different one:

Under the scenes, the operator is configuring the StatefulSet's volumeClaimTemplate property, which you are also able to provide yourself:

Volume resize

It is possible to resize your storage after having provisioned a MariaDB. We need to distinguish between:

• PVCs already in use.

• StatefulSet storage size, which will be used when provisioning new replicas.

It is important to note that, for the first case, your StorageClass must support volume expansion by declaring the allowVolumeExpansion = true. In such case, it will be safe to expand the storage by increasing the size and setting resizeInUseVolumes = true:

Depending on your storage provider, this operation might take a while, and you can decide to wait for this operation before the MariaDB becomes ready by setting waitForVolumeResize = true. Operations such as and will not be performed if the MariaDB resource is not ready.

Ephemeral storage

Provisioning standalone MariaDB instances with ephemeral storage can be done by setting ephemeral = true:

This may be useful for multiple use cases, like provisioning ephemeral MariaDBs for the integration tests of your CI.