Deployment tweaking options

[Eriner]

Feature Description

Allow operators to modify the deployed Container or other Deployment specs, which may be required in some environment configurations. To support these use-cases, we need to make it easy for operators to define their own tweaks and modifications.

Proposed Solution

Sidecar YAML

• Optionally ingest sidecar configuration through a JSON/Yaml file.
  • This should be an optional feature, and will likely only be necessary for
    those few environments that require special configuration to function. We would
    like to support these environments, but in that case it's up to the operator
    to configure. Allowing yaml sidecar definition is the path to enable that.
• There should be to flags for this:
  • --manifest which behaves like kubectl apply
  • --overrides which behaves like kustomize