Node resource usage

CPU and memory per node (requires metrics-server)

kubectl top nodes
tool
k8s-debug27 commands
tags
nodesmonitoring

More k8s-debug commands

  • Pod resource usage sorted
    kubectl top pods -A --sort-by=memory

    Memory-sorted pod usage across all namespaces — find the hungry ones

  • Check what's in a ConfigMap
    kubectl get cm <name> -n <ns> -o jsonpath='{.data}'

    Print just the data field; pipe to python -m json.tool for formatting

  • Decode a Secret
    kubectl get secret <name> -n <ns> -o jsonpath='{.data}' | python3 -c "import sys,json,base64; [print(k,'=',base64.b64decode(v).decode()) for k,v in json.load(sys.stdin).items()]"

    Dump and base64-decode all fields in a k8s Secret

  • List all resources in namespace
    kubectl api-resources --verbs=list --namespaced -o name | xargs -I{} kubectl get {} -n <ns> --ignore-not-found

    Enumerate every resource type in a namespace — useful for auditing

  • JSONPath on any resource
    kubectl get pods -A -o jsonpath='{range .items[*]}{.metadata.namespace}\t{.metadata.name}\t{.status.phase}\n{end}'

    Extract specific fields from k8s API objects without jq

all 27 k8s-debug commands