Ansible For Everyone (Ansible Playbooks) - Part 3

DAY 34- Ansible For Everyone (Ansible Playbooks) - Part 3 - Day Thirty four

100 days of Cloud on GitHub - Read On iCTPro.co.nz - Read on Dev.to

Prerequisite

Please refer to Ansible Part 1 and Part 2 for a detailed understanding.

Ansible For Everyone - Part 1

Anuvindh Sankaravilasam for AWS Community Builders May 21 2 min read

#devops #webdev #productivity #opensource

Ansible For Everyone(Practical) - Part 2

Anuvindh Sankaravilasam for AWS Community Builders Jun 10 3 min read

#devops #webdev #productivity #opensource

Adding Ansible inventory

Lets add our cluster of servers to Ansible infrastucture
In this demo i will be only using AnsibleSlaves-YourProdServer as my prod server.

Goto your Ansible-Control-Center and update ansible hosts file

sudo nano /etc/ansible/hosts

• In this file you will find templetes to add hosts
• lets add our production group of servers
  • Add [YourgGroupName]
  • next line , give a name to server which you are going to add. Lets name app1 then ansible_ssh_host= your ip address of your slave.

[production]app1 ansible_ssh_host= ipaddress of your slave

Let's test the connections

• To test all connections

ansible -m ping all

• To test all connections in a group

ansible -m ping production

• To test connection of a server named app1 in a group

ansible -m ping app1

Below image shows the result of the ping

Modules

• Modules are the commands which help to perform task,in other words modules are kind of library that help to perform tasks.
• List of all modules - link

What are Tasks?
A set of instructions performed with modules.

Ansible Playbooks

Playbooks are written in YAML also Playbooks are lists of tasks that automatically execute against hosts.

Lets create an nginx playbook
ansible modules - https://docs.ansible.com/ansible/2.9/modules/list_of_all_modules.html

• lets create a YAML file

sudo nano nginxplaybook.yaml

• yaml scriping start with three dashes ---
• then you can give a name with start a single dash -
• now we will update the next parameter which is our hosts, in this case it will be production if you wanna do for all servers use all
• so if we need to run as root on targets, we will be setting become parameter to true.
• define task now under task
  • we will be using a apt module to install nginx. Refernce link
  • We have given aname to the task as install nginx.Then will be using apt module as we are using ubuntu.
  • name of the module and state, refer the link for detailed understanding.

---- name: install nginx server  hosts: production  become: yes  tasks:  - name: install nginx    apt:      name: nginx      state: latest

Now lets run the playbook

• Before running the playbook lets check it.ansible-playbook nginxplaybook.yaml --check
• Now lets run the play book

ansible-playbook nginxplaybook.yaml

Deploy code from git

• Here we will deploy a website to the target server using Ansible.

---- name: install nginx server  hosts: production  become: yes  tasks:  - name: install nginx    apt:      name: nginx      state: latest  - name: Clone a repo with separate git directory    ansible.builtin.git:      repo: https://github.com/anuvindhs/CLOUD-is-AWSome.git      dest: /var/www/html/app1

• Now lets run the play book

ansible-playbook nginxplaybook.yaml

Congratulations on you first ansible infrastucture deployment with aws using playbook.

I highly recommend this Tips & Tricks with Examples from spacelift
, this is def comes handy when you are writing complex ansible scripts.

Working with Ansible Playbooks - Tips & Tricks with Examples

Playbooks are one of the basic components of Ansible. Learn how to use them and see detailed examples with best practices.

spacelift.io

Ansible documentation links
Ansible Modules link

Ansible For Everyone - Part 1

Anuvindh Sankaravilasam for AWS Community Builders May 21 2 min read

#devops #webdev #productivity #opensource

Ansible For Everyone(Practical) - Part 2

Anuvindh Sankaravilasam for AWS Community Builders Jun 10 3 min read

#devops #webdev #productivity #opensource

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Anuvindh SankaravilasamFollow

Experienced Cloud Technology Specialist with a demonstrated skillset of working with Emergency, NZ Police & Education industry