I changed the default eviction policy set by kops to include the condition memory.available<1Gi. The --eviction-hard flag is now set as:
memory.available<1Gi,nodefs.available<10%,nodefs.inodesFree<5%,imagefs.available<10%,imagefs.inodesFree<5%
The available memory on one node right now is at 400Mb and has been like this for quite a while. No pod eviction is happening.
Why isn't the kubelet evicting pods to make room? There's plenty of room on other nodes.
Is there an AND between eviction conditions? How can I see what the kubelet sees for memory usage?
Your pods might have quality of service class set to Guaranteed, that's possible reason they are not getting evicted.
See: https://kubernetes.io/docs/tasks/configure-pod-container/quality-service-pod/#qos-classes