Create proxy periodic machine replacement test

Background

We test that we can replace work machines behind a proxy configuration, but we do not test control plane machines.

It would be good to check that the control plane replacement is not going to be disrupted by the proxy

Motivation

We want to make sure that the latency added by having a proxy between resources does not affect replacing control plane machines

Steps

• Create a test that:
  • Checks the cluster operators are all stable/waits for them to stabilise
  • Creates a cluster wide proxy
  • Checks the cluster operators are all stable/waits for them to stabilise
  • Modify master-0's spec to cause it to be update
  • Checks that the CPMS creates a new instance
  • Checks naming of the new machine
  • Checks the old machine isn't marked for deletion while the new Machine's phase is not Running
  • Waits until the replacement is complete, ie CPMS status reports replicas == updatedReplicas
  • Waits until cluster operators stabilise again
  • Remove cluster wide proxy
  • Wait until cluster operators stabilise again

Stakeholders

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Definition of Done

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• Docs

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• Testing

• <Explain testing that will be added>