select multiple pods and log into it http://showterm.io/c58f9999d3ee6db03aa81

k8s_login.sh

function kl() {
  chkcommand() {
    command -v $1 >/dev/null 2>&1 || { echo >&2 "Plz install $1 first. Aborting."; return 1; }
  }
  chkcommand fzf || return 1
  chkcommand tmux || return 1
  chkcommand kubectl || return 1

  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 $tmuxname > /dev/null 2> /dev/null || true
      while read line ;do
        NS=$(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 "
        tmux new-session -d -s $tmuxname "export KUBECONFIG=${KUBECONFIG}; $connect"
        if [ "${init}" == "true" ]; then
          if (( $(tmux ls 2> /dev/null | grep "${tmuxname}" | wc -l) > 0 )) ; then
            init="false"
          fi
        else
          tmux split-window -t "${tmuxname}" "${connect}" && \
          tmux select-layout -t "${tmuxname}" "tiled"
        fi
      done <<< "$pods"
      tmux set-window-option -t "${tmuxname}" synchronize-panes on
      tmux -2 a -t $tmuxname
  fi
}