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kubectl Tooling

kubectl​

.zshrc
# kubectl
source <(kubectl completion zsh)
alias k=kubectl
complete -o default -F __start_kubectl k

krew​

(
  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
)
.zshrc
# krew
export PATH="${KREW_ROOT:-$HOME/.krew}/bin:$PATH"

ctx​

kubectl krew install ctx
kubectl ctx

ns​

kubectl krew install ns
kubectl ns

ksniff​

ksniff는 static-tcpdump 바이너리를 Pod에 주입하여 실행한 후 출력되는 로그를 wireshark에서 읽을 수 있도록 변환해주는 툴입니다. 권한 문제로 캡쳐가 안되는 경우에는 -p 옵션을 사용하여 같은 Node에 새로운 Pod을 추가하여 캡쳐를 수행할 수 있습니다.

kubectl krew install sniff
kubectl sniff <pod> [-n <namespace>] [-p]

node-shell​

kubectl krew install node-shell
kubectl node-shell <node>

k9s​


mise use k9s
k9s info

plugin​

~/.config/k9s/plugins.yaml
plugins:
  log2jq:
    shortCut: Shift-L
    confirm: false
    background: false
    description: "Log to jq"
    scopes:
      - pods
    command: sh
    args:
      - -c
      - |
        echo 'kubectl logs -f --context $CONTEXT -n $NAMESPACE $NAME \\
          | jq -rRC --unbuffered '"'"'. as $line | try fromjson catch $line'"'"' \\
          | sed '"'"'s/\\\\n/\\n/g; s/\\\\t/\\t/g'"'\n\n"

        kubectl logs -f --context $CONTEXT -n $NAMESPACE $NAME \
          | jq -rRC --unbuffered '. as $line | try fromjson catch $line' \
          | sed 's/\\n/\n/g; s/\\t/\t/g'

  node-shell:
    shortCut: s
    confirm: false
    background: false
    description: Shell
    scopes:
      - nodes
    command: sh
    args:
      - -c
      - |
        export KUBECONFIG=$KUBECONFIG
        echo "kubectl node-shell --context $CONTEXT $NAME"
        kubectl node-shell --context $CONTEXT $NAME

Popeye​

sudo mkdir -p /opt/popeye/0.10.1 \
&& cd /opt/popeye/0.10.1 \
&& sudo wget https://github.com/derailed/popeye/releases/download/v0.10.1/popeye_Linux_x86_64.tar.gz \
&& sudo tar xzf popeye_Linux_x86_64.tar.gz
.zshrc
export PATH=/opt/popeye/0.10.1:$PATH