kube shortcut

.zshrc

# set path to kexec.sh
alias kexec='~/shortcuts/kexec.sh'

README.md

1. Download kexec.sh to directory you want to place it
2. Set alias kexec to pointing kexec.sh
3. Update aliases. (like source ~/.zshrc)
4. $ kexec or $ kexec grep_keyword

kexec.sh

#!/usr/bin/env bash
# interactive kubectl exec
# https://unix.stackexchange.com/a/415155
function select_option {
    ESC=$( printf "\033")
    cursor_blink_on()  { printf "$ESC[?25h"; }
    cursor_blink_off() { printf "$ESC[?25l"; }
    cursor_to()        { printf "$ESC[$1;${2:-1}H"; }
    print_option()     { printf "    $1 "; }
    print_selected()   { printf "   $ESC[7m $1 $ESC[27m"; }
    get_cursor_row()   { IFS=';' read -sdR -p $'\E[6n' ROW COL; echo ${ROW#*[}; }
    key_input()        { read -s -n3 key 2>/dev/null >&2
                         if [[ $key = $ESC[A ]]; then echo up;    fi
                         if [[ $key = $ESC[B ]]; then echo down;  fi
                         if [[ $key = ""     ]]; then echo enter; fi; }

    for opt; do printf "\n"; done
    local lastrow=`get_cursor_row`
    local startrow=$(($lastrow - $#))
    trap "cursor_blink_on; stty echo; printf '\n'; exit" 2
    cursor_blink_off

    local selected=0
    while true; do
        local idx=0
        for opt; do
            cursor_to $(($startrow + $idx))
            if [ $idx -eq $selected ]; then
                print_selected "$opt"
            else
                print_option "$opt"
            fi
            ((idx++))
        done

        case `key_input` in
            enter) break;;
            up)    ((selected--));
                   if [ $selected -lt 0 ]; then selected=$(($# - 1)); fi;;
            down)  ((selected++));
                   if [ $selected -ge $# ]; then selected=0; fi;;
        esac
    done

    cursor_to $lastrow
    printf "\n"
    cursor_blink_on

    return $selected
}

if ! [ -x "$(command -v kube)" ]; then
    echo "No command for operating kube."
    exit 1
fi

cmd="kube get pod --no-headers=true -o custom-columns=\":metadata.name\" --field-selector=status.phase=Running"
if [ "$#" -eq "0" ]; then
    pods=$(eval $cmd)
else
    pods=$(eval $cmd | grep $1)
fi
pods=($pods)

echo
echo "Select pod to connect via /bin/bash:"
echo

select_option "${pods[@]}"
choice=$?

echo "Connect to ${pods[$choice]}..."

kube exec -it ${pods[$choice]} /bin/bash