Shell script to manage docker process using pm2

deploy.sh

#!/usr/bin/env bash

set -euo pipefail

# Variables
IMAGE_NAME="my_image_name"
CONTAINER_NAME="my_container_name"
TAG="latest"

# Build Docker image
docker build -t "${IMAGE_NAME}" .

# Check if the container is already running
if [[ $(pm2 pid "$CONTAINER_NAME") ]]; then
  # Container exists, update and restart
  echo "Container ${CONTAINER_NAME} already exists. Updating and restarting..."

  # Stop the existing container
  pm2 stop ${CONTAINER_NAME}

  # Remove the existing container
  docker rm -f ${CONTAINER_NAME}

  # Remove the process
  pm2 delete ${CONTAINER_NAME}

  # Save process after delete
  pm2 save
else
  # Container doesn't exist, start a new one
  echo "Container ${CONTAINER_NAME} doesn't exist. Starting a new one..."
fi

# Run the Docker container
pm2 start docker --name ${CONTAINER_NAME} -- run --name ${CONTAINER_NAME} -p 3000:3000 -e ENV="${ENV}" --env-file "/root/backend.env_${ENV}" --restart=always ${IMAGE_NAME}:${TAG}

# Save process in pm2
pm2 save

# Remove dangling images
docker system prune -f