tree e79b4f9b5596bad79027b1b69fb948fb007fc6e2
parent fad333862865f943922428ea18ecc4a525097096
author d073103 <thomas.draebing@sap.com> 1595583201 +0200
committer Thomas Draebing <thomas.draebing@sap.com> 1607007632 +0100

Fix number of istio-ingressgateway pods

Downscaling of the ingressgateway pods caused premature termination
of requests. In case of long-running git requests, this happened
relatively often.

To mitigate this issue for now, this change pins the number of replicas
to 5, not allowing autoscaling.

In the long term the autoscaling should be enabled again, but being
optimized. This could be done by

- changing the TERMINATION_DRAIN_DURATION_SECONDS option of envoy to
  be long enough for requests to finish
- Adapt the resources allowed for a single pod, so that less scaling
  events happen
- Adapt autoscaler configuration to scale less frequently
- Analyze what is causing the high CPU load at certain times and
  try to reduce the load

Change-Id: I4e59cbb531421caaa18636071d5b605c98ce99fd