deploy.sh

#!/bin/bash

PROJECT_NAME=krabbesholm

cd ~/$PROJECT_NAME

# =====================================================================

if [ $# -eq 0 ]; then
  echo "No branch name provided."
  exit 1
fi

BRANCH=$1

case $BRANCH in
  master) SERVICE='production';;
  *) SERVICE=$1;;
esac

# detect currently running color
if [ $(docker ps | grep "${SERVICE}_blue" | awk '{print $1}') ]; then
  CUR_SERVICE="${SERVICE}_blue"
  NEW_SERVICE="${SERVICE}_green"
else
  CUR_SERVICE="${SERVICE}_green"
  NEW_SERVICE="${SERVICE}_blue"
fi

# =====================================================================

# pull latest image for deployed branch
docker pull tomasce/"${PROJECT_NAME}_${BRANCH}":latest

# precompile assets to shared directory
docker-compose run --rm $NEW_SERVICE bin/rails assets:precompile

# update running containers with the new service
docker-compose up --no-deps -d $NEW_SERVICE

# get IP of new conatiner
NEW_CONTAINER=$(docker ps | grep "${NEW_SERVICE}" | awk '{print $1}')
NEW_CONTAINER_IP=$(docker inspect --format='{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $NEW_CONTAINER)

# wait until new container boots up
while ! curl -XGET http://$NEW_CONTAINER_IP:3000; do sleep 1; done

# notify appsignal on deploy
docker exec $NEW_CONTAINER bash -c 'appsignal notify_of_deploy --revision=$(git describe --always HEAD) --environment=$RAILS_ENV --user=deployer'

sleep 5

# stop the currently running color
docker-compose stop $CUR_SERVICE

# =====================================================================

# remove exited containers
docker rm -v $(docker ps -a -q -f status=exited)

# remove dangling images
docker rmi $(docker images -f "dangling=true" -q)

# remove unwanted volumes
docker run -v /var/run/docker.sock:/var/run/docker.sock -v /var/lib/docker:/var/lib/docker --rm martin/docker-cleanup-volumes