k8s get multi shell & get multiple pods logs based on its label

multi.sh

# NOTE: Please install kubectl, fzf, stern, tmux first before using this functions
# NOTE: 사용전에 kubectl, fzf, stern, tmux 를 먼저 설치하세요.

# Choose multiple pods using `TAB` and then get their shells using `ENTER`.
# TAB으로 pod들을 선택하고 ENTER로 그 pod들의 shell을 동시에 얻습니다.
function multi_login() {
  pods=$(kubectl get pods --all-namespaces | sed '1d' | fzf -x -m -e +s --reverse --bind=left:page-up,right:page-down --no-mouse | awk '{print $1","$2}')
  if [[ $pods != "" ]]; then
      init="true"
      tmuxname=k8s-ns-$(date +%s)
      tmux kill-session -t "$tmuxname" > /dev/null 2> /dev/null || true
      while read -r line ;do
        NS=$(echo "$line" | cut -d',' -f1)
        NAME=$(echo "$line" | cut -d',' -f2)
        connect="kubectl exec -ti $NAME -n $NS -- bash || kubectl exec -ti $NAME -n $NS -- sh "
        if [ "${init}" == "true" ]; then
          tmux new-session -d -s "$tmuxname" "export KUBECONFIG=${KUBECONFIG}; $connect"
          if (( $(tmux ls 2> /dev/null | grep -c "${tmuxname}") > 0 )) ; then
            init="false"
          fi
        else
          tmux split-window -t "${tmuxname}" "export KUBECONFIG=${KUBECONFIG}; ${connect}" && \
          tmux select-layout -t "${tmuxname}" "tiled"
        fi
      done <<< "$pods"
      tmux set-window-option -t "${tmuxname}" synchronize-panes on
      tmux send-keys -t 0 "export TERM=xterm-color ; shopt -s checkwinsize; printf '\\e[8;320;320t' ; clear; tput cols" C-m
      tmux -2 a -t "$tmuxname"
  fi
}

# Select a pod using `ENTER` then get logs from pods same as their labels.
# `ENTER`로 pod을 선택하면 동일한 라벨을 같은 팟들의 로그를 동시에 볼 수 있습니다.
function label_log() {
    pods=$(kubectl get pods --all-namespaces \
        --no-headers --show-labels | \
        sed '1d' | \
        fzf -x -m -e +s --reverse --no-mouse \
        --bind=left:page-up,right:page-down | \
        awk '{print $1" "$7}');
    if [[ $pods != "" ]]; then
        namespace=${pods/ *};
        label=${pods/* };
        stern -t -n "$namespace" -l "$label";
    fi
}