Allow management-api in different port

[burmanm]

What is missing?
Currently management-api is considered to be always in the port 8080 by the cass-operator. We should allow PodHost to define a port as well to simplify testing and potentially allow deployments where the port is different.

┆Issue is synchronized with this Jira Story by Unito
┆Issue Number: CASS-52

[burmanm]

And/or we should also allow management api initialization to be captured and mocked so that we could inject httpclient there.

[Ajith-ceg]

Hi @burmanm
I have been using host networking for the multi-cluster k8ssandra deployment. Node local dns process is running on port 8080 on all the worker nodes. So, there was a port conflict with cass-management API. This feature would be of great value. May I know any updates and when this feature would be rolled out?

[burmanm]

Part of the work is done in the envtesting PR. This allows the cass-operator to query the modified port, but it does not yet allow changing them from the CRD. That'll require another set of changes to expose the port settings.

[Ajith-ceg]

What is the problem with CRD? Could you pls elaborate on it?
And Good to know that work is going on this...thanks for your update @burmanm

[burmanm]

What is the problem with CRD? Could you pls elaborate on it?

There's nothing in the CRD that would allow overriding ports. The ports are currently hardcoded in cass-operator. That said, I could enable changing them through the PodTemplateSpec in the containerPorts, but that would be somewhat hidden feature in that case. Maybe that would be fine.

[burmanm]

Actually, there's no need to do any of that, we already supported it in the PodTemplateSpec. See the test in commit 52a430d

That would change the mgmt-api port that cass-operator calls. It does not however modify the port that management-api itself listens to. That's defined in the Dockerfile entrypoitn of mgmt-api:

https://github.com/k8ssandra/management-api-for-apache-cassandra/blob/ce77e239a69697926777866a8db7d7530b9d503a/scripts/docker-entrypoint.sh#L182

Which you will need to override for mgmt-api to listen to in a different port. That's the problem with running in hostnetwork for everything, we can't do do port forwards.

[burmanm]

Relevant: k8ssandra/management-api-for-apache-cassandra#418