How to deploy nodejs app on GCP Compute:

Steps:

1. Create a VM a. Allow SSH access via key. Add your public key while you create a VM.

2. Install packages:

   sudo apt-get update
   sudo apt install -y nginx
   sudo apt install -y git
   curl -sL https://deb.nodesource.com/setup_16.x | sudo bash -
   sudo apt -y install nodejs
   sudo apt install -y certbot python3-certbot-nginx
   

3. Clone the repo under home directory: git clone https://github.com/ajaysourcedigital/test-app.git

4. Create script.sh file under /home/ with below content:

   #!/bin/bash
   cd /home/ajaykumar/hello-world
   git checkout main
   git pull
   sudo systemctl restart hello.service
   

   • hello.service is described at step 6.

5. Change the content of /etc/nginx/sites-enabled/default to :

   location / {
   	proxy_pass http://127.0.0.1:3000;
   }
   

   • Any changes you do to default nginx file, you have to run sudo systemctl restart nginx

6. create systemctl service under /etc/systemd/system/hello.service :

   [Unit]
   Description=API service
   [Service]
   User=ajaykumar
   Restart=always
   KillSignal=SIGQUIT
   WorkingDirectory=/home/ajaykumar/hello-world
   ExecStart=/usr/bin/node app.js
   [Install]
   WantedBy=multi-user.target
   

   once created you have enable the systemctl daemon process: systemctl enable hello.service

   If you do any changes to hello.service file, you have to restart daemon: systemctl daemon reload

7. Generate SSL certificate:

   sudo certbot --nginx -d ajay.domain.com
   

8 CICD: look at .github/workflows/main.yaml