Build and deploy docker image to remote hosts via SSH

deploy.sh

#!/bin/bash -e
get_current_branch() {
  echo `git symbolic-ref --short HEAD`
}

get_app_name() {
  local branch_name=$(get_current_branch)
  local app_name=$npm_package_name

  if [ $branch_name != "master" ]; then
    echo $branch_name.$app_name
  else
    echo $app_name
  fi
}

get_image_name() {
  local app_name=$1
  local tag=${2:-latest}

  echo dokku/$app_name:$tag
}

get_version_tag() {
  local version=$npm_package_version

  echo v$version
}

build_docker_image() {
  local image_name=$1
  local output_path=$2

  echo "Building $image_name..."

  docker build --tag $image_name .
  docker save $image_name | bzip2 > $output_path
}

upload_image() {
  local host=$1
  local image_path=$2

  echo "Uploading image to $host..."

  pv $image_path | ssh $host "bunzip2 | docker load"
}

function deploy_tag() {
  local host=$1
  local app_name=$2
  local tag=$3

  ssh $host "dokku apps:create $app_name; dokku tags:deploy $app_name $tag"
}

function copy_tag() {
  local host=$1
  local app_name=$2
  local from=$(get_image_name $app_name $3)
  local to=$(get_image_name $app_name $4)

  ssh $host "docker tag -f $from $to"
}

[email protected]
APP_NAME=$(get_app_name)
VERSION_TAG=$(get_version_tag)
IMAGE_PATH=`mktemp`

# Build docker image
build_docker_image $(get_image_name $APP_NAME $VERSION_TAG) $IMAGE_PATH

# Deploy to primary
upload_image $PRIMARY_HOST $IMAGE_PATH
deploy_tag $PRIMARY_HOST $APP_NAME $VERSION_TAG
copy_tag $PRIMARY_HOST $APP_NAME latest previous || true
copy_tag $PRIMARY_HOST $APP_NAME $VERSION_TAG latest