ci: increase goldpinger replicas from 4 to 8 and add topology constraints #3376
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Reason for Change:
Attempts to fix this issue in our pipelines: https://msazure.visualstudio.com/One/_build/results?buildId=113599589&view=logs&j=b1429627-982b-5d7c-f874-2297f1590463&t=f4ed6e9d-3ea8-54bd-90c0-ce2d41a370dc
It looks like there is a possibility that one node becomes unbalanced (ex: both metrics pods, gateway keepers etc. all land on the same node), and so new pods are scheduled all on the other node to balance resources. This PR increases the number of replicas such that it is more likely that at least two pods land on each node (which is a hard requirement in the test). It also adds a topology constraint to encourage pods to distribute themselves on the nodes.
Issue Fixed:
Requirements:
Notes:
Successful runs:
https://msazure.visualstudio.com/One/_build/results?buildId=113216481
https://msazure.visualstudio.com/One/_build/results?buildId=113216663
https://msazure.visualstudio.com/One/_build/results?buildId=113217222
https://msazure.visualstudio.com/One/_build/results?buildId=113258554
https://msazure.visualstudio.com/One/_build/results?buildId=113266372