Jenkins with ansible

• This example has 3 services
• Jenkins server with ansible installed
• Ubuntu OSRemote host machine with mysql cli and aws cli installed
• MySQL server

Credentials

• jenkins
• user: admin
• password: 123
• ubuntu
• user: ubuntu
• password: 123
• mysql
• user: root
• password: 123

Ansible Inventory

• Create a folder ansible in the jenkins_home folder

• Copy the ubuntu-key to the jenkins_home

• Inventory is the file in which is defined all the hosts and how to connect to them

• https://docs.ansible.com/ansible/latest/user_guide/intro_inventory.html
• Groups are defined with squared brackets []

[all:vars]

ansible_connection = ssh

[test]
myremotehost ansible_host=ubuntu ansible_user=ubuntu ansible_private_key_file=/var/jenkins_home/ansible/ubuntu-key

• Copy the hosts file into the jenkins_home/ansible folder
• Connect with the jenkins-ansible container!

ansible -i "hosts-file" -m "command" "host-alias"
ansible -i "./hosts" -m "ping" "myremotehost"

Ansible Playbook

• Playbook is a script that defines all the things that ansible must do
• https://docs.ansible.com/ansible/latest/user_guide/playbooks.html

- hosts: myremotehost #  host to execute the task
  tasks:
    - shell: echo Hello World > /tmp/hello.txt # task as a shell script

• Run playbook

ansible-playbook -i "hosts-file" "playbook-file"
ansible-playbook -i "./hosts" "./playbook.yaml"

Ansible plugin for Jenkins

• Manage Jenkins -> Manage Plugins
• Ansible plugin
• New Item -> Build -> Invoke Ansible Playbook
• Insert playbook and hosts paths
• Add extra variables - key (variable for ansible), value (variable from jenkins parameter $MYVAR)
• Colored output in jenkins
• AnsiColor plugin
• Color ANSI Console Output in Build Environment and Colorized stdout in Build

Copy the script to copy txt into database into db-host container

docker cp ./people.txt db-host:/tmp
docker cp ./put.sh db-host:/tmp

Playbook jenkins->db

[all:vars]
ansible_connection = ssh

[test]
test1 ansible_host=remote-host ansible_user=ubuntu ansible_private_key_file=/var/jenkins_home/ansible/ubuntu-key
web1 ansible_host=web ansible_user=ubuntu ansible_private_key_file=/var/jenkins_home/ansible/ubuntu-key

# Test connection
ansible -m ping -i hosts web1
ansible -m ping -i hosts all

# This playbook update the table in the mysql container

- hosts: web1
  tasks:
    - name: Transfer template to web server
      template:
        src: table.j2
        dest: /var/www/html/index.php

# Run playbook
ansible-playbook -i hosts people.yml -e "PEOPLE_AGE=25" # -e specify parameters