The operator supports upgrade of the operands, operator update are not supported from the moment.

On Openshift the operator relies on BuildConfig and DeploymentConfig.

The BuildConfig builds are new image when triggered by a configured Webhook, the built images are pushed to an internal ImageStream.

The DeployementConfig automatically deploys new images when they are pushed in the ImageStream.

To test:
1 - push a new image to ImageStream and check that the pods are updated and the new version is accessible.

2 - Use a Webhook to trigger a new build and push for the image, and check like 1.