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Monitor¶

Install `krew`¶

krew is the plugin manager: https://krew.sigs.k8s.io/docs/user-guide/setup/install/

Make sure git is installed and run

(
  set -x; cd "$(mktemp -d)" &&
  OS="$(uname | tr '[:upper:]' '[:lower:]')" &&
  ARCH="$(uname -m | sed -e 's/x86_64/amd64/' -e 's/\(arm\)\(64\)\?.*/\1\2/' -e 's/aarch64$/arm64/')" &&
  KREW="krew-${OS}_${ARCH}" &&
  curl -fsSLO "https://github.com/kubernetes-sigs/krew/releases/latest/download/${KREW}.tar.gz" &&
  tar zxvf "${KREW}.tar.gz" &&
  ./"${KREW}" install krew
)

Add $HOME/.krew/bin directory to PATH by appending the folowing line to .bashrc:

export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"

The restart the shell and check the version:

kubectl krew version

Plugin `resource-capacity`¶

Resource usage using resource-capacity plugin: https://www.middlewareinventory.com/blog/cpu-memory-usage-nodes-k8s/

Install the plugin¶

kubectl krew install resource-capacity
kubectl krew list #list all installed plugins

Get node cpu and memory usage¶

kubectl resource-capacity
kubectl resource-capacity --sort cpu.limit
kubectl resource-capacity --sort cpu.util --util                     #include utilization
kubectl resource-capacity --sort cpu.util --util --pods              #pod level report
kubectl resource-capacity --sort cpu.util --util --pods --containers #container level report

Get namespace cpu and memory usage¶

kubectl resource-capacity -n kube-system -p -c
kubectl resource-capacity -n kube-system --pods --containers

Sort flags¶

cpu.util, cpu.request, cpu.limit, mem.util, mem.request, mem.limit, name

`--node-labels` flag¶

kubectl resource-capacity --namespace-labels <namespace-label>
kubectl resource-capacity --node-labels <node-label>
kubectl resource-capacity --pod-labels <pod-label>

Output formats:¶

yaml
json
table ( default)
```
kubectl resource-capacity -o yaml
```