Deploy

deploy.sh

# Deployment with zero downtime
# By default keeps 2 last deployments in KEEP_DEPLOYMENTS_DIR and current deployment 

BUILD_ID="$1"

ROOT_DIR="$(pwd)"

# Project domain
PROJECT_NAME="test.com"
# Project directory
TARGET_DIR="${ROOT_DIR}/${PROJECT_NAME}"

# Deployments directory
KEEP_DEPLOYMENTS_DIR="${ROOT_DIR}/deploy"
KEEP_DEPLOYMENTS=2

CURRENT_DEPLOY_DIR="${BUILD_ID}_$(date +'%d%m%Y_%H%M%S')"
DEPLOY_DIR_PROJECT=${KEEP_DEPLOYMENTS_DIR}/${PROJECT_NAME}
DEPLOY_DIR=${DEPLOY_DIR_PROJECT}/${CURRENT_DEPLOY_DIR}


echo "Initialize deployment directory '"${DEPLOY_DIR}"'"
[ -d "${DEPLOY_DIR}" ] || mkdir -p "${DEPLOY_DIR}"

cd "${DEPLOY_DIR}"
touch foo

echo "Copying '"${TARGET_DIR}/"' to '"${DEPLOY_DIR}"'"
rsync -a "${TARGET_DIR}/" "${DEPLOY_DIR}"


echo "Execute commands in deployment directory"
cd "${DEPLOY_DIR}"



# Atomic, zero downtime
echo "Update symlink '"${DEPLOY_DIR}"' to '"${TARGET_DIR}.tmp"'"
ln -s "${DEPLOY_DIR}" "${TARGET_DIR}.tmp"

# Remove current project directory if not symlink
if [ ! -h "${TARGET_DIR}" ]; then
  rm -rf "${TARGET_DIR}"
fi

echo "Update symlink '"${DEPLOY_DIR}.tmp"' to '"${TARGET_DIR}"'"
mv -Tf "${TARGET_DIR}.tmp" "${TARGET_DIR}"

echo "Clear old deployments in '"${DEPLOY_DIR_PROJECT}" keep last '"${KEEP_DEPLOYMENTS}"'"
cd "${DEPLOY_DIR_PROJECT}"
rm -rf "$(ls -t ${DEPLOY_DIR_PROJECT} | grep -v ${CURRENT_DEPLOY_DIR} | tail -n +$((KEEP_DEPLOYMENTS+1)))"