kubectl run with PVCs

run-with-pvc.sh

#!/bin/bash

###
### https://gist.github.com/svinther/101d563e8adb14d096326f55e240a55d
###

IMAGE="svinther/docker-armyknife"
COMMAND="/bin/bash"
NAMESPACE=default
SERVICEACCOUNT=
PULLPOLICY=Always
SUFFIX=$(date +%s | shasum | base64 | fold -w 3 | head -1 | tr '[:upper:]' '[:lower:]')

usage_exit() {
    echo "Usage: $0 [-c command] [-i image] [-n namespace] [-s serviceaccount] [-p imagePullPolicy] [PVC...]" 1>&2
    exit 1
}

while getopts i:c:n:s:p:h OPT
do
    case $OPT in
        i)  IMAGE=$OPTARG
            ;;
        c)  COMMAND=$OPTARG
            ;;
        n)  NAMESPACE=$OPTARG
            ;;
        s)  SERVICEACCOUNT=$OPTARG
            ;;
        p)  PULLPOLICY=$OPTARG
            ;;
        h)  usage_exit
            ;;
        \?) usage_exit
            ;;
    esac
done
shift $(($OPTIND - 1))

VOL_MOUNTS=""
VOLS=""
COMMA=""

for i in $@
do
  VOL_MOUNTS="${VOL_MOUNTS}${COMMA}{\"name\": \"${i}\",\"mountPath\": \"/pvcs/${i}\"}"
  VOLS="${VOLS}${COMMA}{\"name\": \"${i}\",\"persistentVolumeClaim\": {\"claimName\": \"${i}\"}}"
  COMMA=","
done

JSON_PATCH=$(cat << EOF
{
  "spec": {
    $([ -n "$SERVICEACCOUNT" ] && printf '"serviceAccount": "%s",' "$SERVICEACCOUNT")
    "hostNetwork": false,
    "containers":[
      {
        "imagePullPolicy": "${PULLPOLICY}" ,
        "args": ["${COMMAND}"],
        "stdin": true,
        "tty": true,
        "name": "pvc",
        "image": "${IMAGE}",
        "volumeMounts": [
          ${VOL_MOUNTS}
        ]
      }
    ],
    "volumes": [
      ${VOLS}
    ]
  }
}
EOF
)

kubectl run \
--namespace=${NAMESPACE} \
-it --rm --restart=Never \
--image=${IMAGE} \
--overrides "$JSON_PATCH" \
mypod-${SUFFIX} \
-- ${COMMAND}