/deploy-nodejs-and-npm-using-ansible

Project Title

Deploy nodejs app using ansible .

Description

This project aims to deploy nodejs app using ansible playbook which consist of two plays every one contains some to deploy this app .

prerequisites

Before start to create ansible playbook some prerequisites such as:

1- Create two ubuntu ec2 on aws

2- Create vm on vmware workstation (locally) using centos 7 os act as ansible controller

3- Create user called ansible on each vm (local vm and ec2) and add it to sudoers users

4- Install ansible on centos 7 vm

5- Connect to each ec2 using ssh connection

6- Create inventory file to include ec2 hosts under group name "nodes"

7- Create ansible.cfg file to include two main ansible configuration as following:

  • default

    • inventory=inventory
    • host_key_checking=false
    • remote_user=ansible

  • privilege_escalation

    • become=true
    • become_user=root
    • become_method=sudo
    • become_ask_pass=no

Install node and npm Play

This play has many tasks :

  • Update system cache => using apt module and save cache for 3600 sec
  • Install nodejs => using apt module
  • Install npm => using apt module

Delpoy nodejs app play

This play has many tasks:

  • Copy nodejs folder => using Copy module to copy nodejs.tar from current directory to /root/
  • Unpack nodjs file => using unarchive module
  • install dependancy => using npm (not buit in module) which install in first play
  • start app => using command module to run cmd command " node sever"
  • ensure app is running => using shell module and save output in register module with variable name called "output"
  • print output => using debug module to print output from register

Variable

Create file called group_vars/nodes which ansible will understand it without need to referance it in every play in playbook .

nodes=> group of two ec2 hosts in inventory file.