Upgrading script of sameersbn/gitlab.

upgrade-gitlab.sh

#!/bin/bash

# Usage:
# $ FROM_VERSION=10.8.3-1 TO_VERSION=11.0.0 bash upgrade-gitlab.sh
# 
# Assuming that you have `sameersbn/gitlab:version_string` entry in docker-compose.yml.
# See https://github.com/sameersbn/docker-gitlab

: ${FROM_VERSION:?}
: ${TO_VERSION:?}

set -xe

if ! grep "sameersbn/gitlab:${FROM_VERSION}" docker-compose.yml ; then
  echo "sameersbn/gitlab:${FROM_VERSION} is not found in docker-compose.yml. Error!"
  exit 1
fi

echo "Take the TO_VERSION image."
docker pull "sameersbn/gitlab:${TO_VERSION}"

echo "Take a backup."
docker-compose exec gitlab /sbin/entrypoint.sh app:rake gitlab:backup:create
docker-compose stop gitlab
docker-compose rm -f gitlab
# docker-compose exec gitlab app:rake gitlab:backup:create

echo "Substitute sameersbn/gitlab:${FROM_VERSION} to sameersbn/gitlab:${TO_VERSION} in docker-compose.yml"
sed -i -s "s|sameersbn/gitlab:${FROM_VERSION}|sameersbn/gitlab:${TO_VERSION}|" docker-compose.yml

echo "Up the gitlab."
docker-compose up -d gitlab

## When you have some reverse-proxy.
# echo "Restart the Nginx."
# docker-compose restart nginx