fix: istio-sidecar annotations #256
Description
Prerequisites
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Expected Behavior
Cluster Autoscaler doesn't touch pods not managed by any of controllers (deployment, replicaset, etc).
Current Behavior
All pods in a cluster (if Istio is installed) have annotation cluster-autoscaler.kubernetes.io/safe-to-evict: true. It allows Cluster Autoscaler to terminate such pods to reschedule them on other nodes.
The configuration
was added because of kubeflow/pipelines#4530. However, a new configuration of Cluster Autoscaler covers this case ( )Failure Information (for bugs)
For example, if pods are run by Airflow they aren't managed by any controllers (raw pods) and Cluster Autoscaler can terminate such pods without waiting for finishing jobs (in case of scale-down nodes because of underutilization).