Remove unnecessary old containers

remove-old-containers.sh

#!/bin/bash

# Must set container prefix
DELETE_REGEX="^temp-.*"

# protect containers regex
EXCLUDE_REGEX="(?!(jenkins|nginx))"

current=$(date +"%s")
deleteUntil=$(date -d '-3 days' +"%s")

docker ps -q --filter "name=$EXCLUDE_REGEX" --filter "name=$DELETE_REGEX" --format "{{.ID}}" | while read containerId
do
  createdAtStr=$(docker inspect -f "{{.Created}}" "$containerId")
  createdAt=$(date -d "$createdAtStr" +"%s")
  if [ "$createdAt" -lt "$deleteUntil" ]; then
    docker rm -f $containerId
  fi
done