dreplace

#!/bin/bash
# Replaces a container with an upgraded version from Docker Hub and recreates
# using arguments supplied via /opt/docker.list

CONTAINER_NAME="$@"
LIST="docker.list"

# check docker.list exists, exit if not
{
if [ ! -f $LIST ]; then
  echo "docker.list not found!"
  exit 0
fi
}

# check specified container exists in docker.list, exit if not


# read from docker.list the specified containers 'create' command
DOCKER_CREATE=$(sed -n "/^docker create --name $CONTAINER_NAME \\\\$/,/\/$CONTAINER_NAME$/p" $LIST | sed -E 's/(".*")|\\/\1/g')
echo $DOCKER_CREATE

# check if container already exists (docker ps -a), stop + remove if yes
{
  if docker ps | grep $CONTAINER_NAME;
  then
    echo "Container exists already..."
    docker pull ${DOCKER_CREATE##* }
    docker stop $CONTAINER_NAME
    docker rm $CONTAINER_NAME
    $DOCKER_CREATE
    docker start $CONTAINER_NAME
  else
    echo "Container doesn't exist, exiting..."
    exit 0
  fi
}