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How to fix Insufficient memory in Kubernetes | DevErrors

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How to fix insufficient memory

How to fix Insufficient memory in Kubernetes

KubernetesINTERMEDIATEHIGH

Error when no node has enough available memory

What this error means

Scheduler cannot find node with memory

Typical symptoms

pending
insufficient message
high memory
deployments fail
OOM pending

Common causes

request too high
consuming memory
insufficient nodes
memory leak
system memory

How to fix "Insufficient memory"

1Check request

kubectl get pod -o yaml | grep memory

2Check availability

kubectl top nodes

3Reduce request

kubectl set resources --requests=memory

4Profile usage

kubectl top pod shows actual

Scale down

Advanced notes

Mi = Mebibyte. Use binary units. OOM if exceeds limit. Burstable pods can be evicted.

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Official resources & further reading

📚Kubernetes Official Documentation
📖
Kubernetes Docs: assign memory resource(Official Docs)
📖
Kubernetes Docs: manage resources containers(Official Docs)
📖
Google Cloud Docs: kubernetes best practices resource requests and limits(Official Docs)

5

Delete non-critical pods

6Add nodes

Increase cluster nodes

etcdserver: cluster ID mismatch

How to fix "etcdserver: cluster ID mismatch" in Kubernetes

running with swap on is not supported

How to fix "running with swap on is not supported" in kubeadm