Allow setting requests/limits on init containers

[agracie]

I'm trying to deploy stackstorm-k8s into an environment that enforces resourcequota requiring limits to be defined to all containers and init containers. This environment does not provide a limit range or default namespace limits. It would be very helpful to be able to define resources and limits of the individual init containers or have a default values/limits set for them.

[chain312]

You can refer to st2web for other component configurations in values.yaml

st2web:
  # Minimum 2 replicas are recommended to run st2web in HA mode
  replicas: 2
  # Tested resource consumption based on multiple requests to st2web within nginx
  # Please adjust based on your conscious choice
  resources:
    requests:
      memory: "25Mi"
      cpu: "50m"
    limits:
      memory: "100Mi"

[cognifloyd]

PR welcome. You'll need to add the resources section to each of the init containers. I count 13 init containers defined in:

• templates/deployments.yaml
  • st2auth > generate-htpasswd: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/deployments.yaml#L49
  • st2sensorcontainer > init-config: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/deployments.yaml#L1177
  • st2client > generate-st2client-config: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/deployments.yaml#L1619
• templates/jobs.yaml
  • job-st2-apikey-load > wait-for-api: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/jobs.yaml#L136
  • job-st2-apikey-load > generate-st2client-config: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/jobs.yaml#L150
  • job-st2-key-load > generate-st2client-config: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/jobs.yaml#L276
  • job-st2-register-content > st2-register-content-custom-init: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/jobs.yaml#L412
  • extra_hooks job > generate-st2client-config: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/jobs.yaml#L645
• templates/_helpers.tpl, specifically the templates:
  • stackstorm-ha.init-containers-wait-for-db
  • wait-for-db: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/_helpers.tpl#L197
  • stackstorm-ha.init-containers-wait-for-mq
  • wait-for-queue: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/_helpers.tpl#L218
  • stackstorm-ha.packs-initContainers (there are 3 init containers in this template)
  • st2-custom-pack: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/_helpers.tpl#L335
  • st2-system-packs: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/_helpers.tpl#L357
  • st2-pack-configs-from-helm: https://github.com/StackStorm/stackstorm-k8s/blob/master/templates/_helpers.tpl#L378

These are all pretty basic utility containers that do not need many resources. Is there a default we could put here? Or perhaps add a value like utilityResources (we have image.utilityImage to set the image, though we should not put resources under image)?