[PoC] using kustomize to provide flexible override to awx deployments

[TheRealHaoLiu]

SUMMARY

example

task_pod_spec_kustomization: |
  containers:
  - name: extra-container
    image: quay.io/ansible/awx-ee:latest
    args:
    - /bin/sh
    - -c
    - |
      echo "Hello from extra-container"
      sleep 3600

ISSUE TYPE

• Breaking Change
• New or Enhanced Feature
• Bug, Docs Fix or other nominal change

ADDITIONAL INFORMATION

[TheRealHaoLiu]

cc @kurokobo @rooftopcellist @shanemcd

[kurokobo]

I am interested in this but I don't know if using kustomize is the best way to achieve overriding.
Also I don't want to use massive YAML multiline strings since it ignores syntax highlighting and make it hard to read.
Will investigate similar implementation.

[kurokobo]

Thanks for implementing this, I have not tested well but by using kustomize like your PR it's hard to add custom env to specific container for example.

I'm considering to use combine and community.general.lists_mergeby filter. Will try to create an alternative PR as a PoC.

[kurokobo]

My idea: #1697

[kurokobo]

but by using kustomize like your PR it's hard to add custom env to specific container for example

Ah ignore my comment due to lack of my understanding 😞
Strategic Merge by Kustomize can merge dict for each containers by using name as merge key, so we can add env, volumeMounts, etc. to pre-deifined containers such as awx-task, redis, etc.
Kustomize way may be safer than merging by combine or lists_mergeby that implemented in my PR #1697.

So this PR is enough for most use-cases I think. It should be better if we can define *_pod_spec_kustomization as dict instead of multi-line strings (Maybe I just dislike multi-line strings excessively).

[kurokobo]

We can use kubernetes.core.kustomize lookup instead.

https://docs.ansible.com/ansible/latest/collections/kubernetes/core/kustomize_lookup.html