ReplicationController scaling

[holandes22]

1. Do GET request to http://localhost:8080/api/v1/namespaces/default/replicationcontrollers/data-processor
2. Get the spec.replicas value, if the same return OK
3. if not the same modify the manifest. spec.replicas value with the new value
4. Do PUT request to same URL

We need an input component that allows to spin up or down the value,

• The input should be a number >= 0

Form

• If invalid inputs, submit button is invalid
• On submit, trigger action
• Action will
  • Get model (spec)
  • if new value is the same as in spec do nothing
  • Else, replace the value in spec and send a PUT request. Show a flash message, and refresh after a few second (although change might not be reflected right away, only after k8s finished adding/removing the replication)

[holandes22]

According to docs "A replicationController is only appropriate for pods with RestartPolicy = Always" so we might need to hide this if that is the case

[holandes22]

Possible feature to add in a future // If the replication controller named foo's current size is 2, scale foo to 3. $ kubectl scale --current-replicas=2 --replicas=3 replicationcontrollers foo