Comment 9 for bug 1945239

Hi Nobuto,

We didn't test scenarios where the flag flips. We don't want this to happen. Deployments that are running purestorage with host=<same_value> shouldn't be running it this way, as per upstream recommendations. We have not investigated steps to migrate an env that was previously deployed with host=<same_value> to host=<diff_value>.

I'd assume purestorage upstream Cinder CI would have tested Active-passive failover, given that they didn't support AA HA until Victoria. For the charm, I believe we don't have functional tests covering any type failure scenario, AA or AP.

The deployment recommendations of separate cinder charm apps for AA and AP hasn't been documented yet in our charm guides. But yes, your example is correct, you will need 4 nodes for that case because we cannot mix stateless=False and True in the same charm app.

Please let us know more details of the instances where it will impact existing envs so we can work that out.