Kubectl exec with working terminal

ksh

#!/bin/sh

if [ "$1" = "" ]; then
  echo "Usage: ksh <pod> [flags_to_kubectl]"
  exit 1
fi
POD=$1
shift

COLUMNS=`tput cols`
LINES=`tput lines`
TERM=xterm
KUBE_SHELL=${KUBE_SHELL:-bash}
kubectl exec -i -t $POD "$@" -- env COLUMNS=$COLUMNS LINES=$LINES TERM=$TERM "$KUBE_SHELL"

I originally found this on Kubernetes slack channel. I adapted it so that it can be used with pods running in any namespace. Example:

$ ./ksh pod_name

$ ./ksh pod_name --namespace=kube-system

$ KUBE_SHELL=sh ./ksh pod_name

And one for the bashrc or .functions if your a dotfiles man.

function ksh() {
  if [ $1 = "" ]; then
    echo "Usage: ksh <pod> [flags_to_kubectl]"
    return 1
  fi

  local POD=$1
  shift

  local COLUMNS=$(tput cols)
  local LINES=$(tput lines)
  local TERM=xterm
  local KUBE_SHELL=${KUBE_SHELL:-/bin/sh -il}
  local cmd="kubectl exec -i -t $POD $@ -- env COLUMNS=$COLUMNS LINES=$LINES TERM=$TERM $KUBE_SHELL"
  echo $cmd
  eval $cmd
}

Thanks @coresolve !