Run bash in a pod

kube_run_bash.sh

#!/bin/bash

http_proxy=
ns=mfsp-island80-k8snew
pod_expr=spark-mux
container=spark-mux

while getopts ":hn:p:c:" arg; do
    case $arg in
        n)
            ns=$OPTARG
            ;;
        p)
            pod_expr=$OPTARG
            ;;
        c)
            container=$OPTARG
            ;;
        *)
            echo "-h Help"
            echo "-n NAMESPACE Choose a namespace (Default $ns)"
            echo "-p PODEXPR Choose a pod expression (Default $pod_expr)"
            echo "-c CONTAINER Choose a container name (Default $container)"
            exit 0
            ;;
    esac
done

pod=$(kubectl -n $ns get pods | awk "/${pod_expr}/"'{print $1}')

echo $pod

if [ -z "$pod" ]; then
    echo NO POD FOUND!
    exit 1
fi

kubectl -n $ns logs $pod -c $container
kubectl -n $ns exec $pod -c $container -it bash