Get a shell on a k8s pod

k8shell

#!/usr/bin/env bash

# Usage: k8shell namespace/pod.

set -euo pipefail

mapfile -d "/" -t ns_pod <<< "$1"

if [ "${#ns_pod[@]}" == 2 ]; then
    ns="${ns_pod[0]}"
    pod="${ns_pod[1]%$'\n'}"
elif [ "${#ns_pod[@]}" == 1 ]; then
    ns="default"
    pod="${ns_pod[0]%$'\n'}"
else
    echo "Pod required" 2>&1
    exit 1
fi

kubectl exec -n "$ns" -it "$pod" -- /bin/bash