sanhphanvan96/hands-on-ansible

Get started with automation and orchestration using the open-source tool Ansible

Quick notes

Install apache2 (httpd alternative)

• ansible-doc apt
• ansible web -i inventory_test -m apt -a "name=apache2 state=present" --become

Apache Service: auto start on boot, state started

• ansible-doc service
• ansible web -i inventory_test -m service -a "name=apache2 enabled=yes state=started" --become

Install mysqld

• ansible db -i inventory_test -m apt -a "name=mysqld state=present" --become

Module

• setup

ansible all -i inventory_test -m setup -a "filter=ansible_en*" 
ansible all -i inventory_test -m setup -a "filter=ansible_mounts"
ansible all -i inventory_test -m setup -a "filter=ansible_mounts" --tree ./setup

Playbook

• Plays are ordered sets of tasks to execute against host selections from your inventory
• Playbook is a file containing one or more plays
• notify handles from task and handlers
• condition clause: based on os family (when: ansible_os_family == "Debian"), based on output
• using template: Jinja2 Engine

ansible-playbook -i hosts.local provision.yml --become

Roles => Making your playbooks reusable

• Roles are a packages of closely related Ansible content that can be shared more easily than plays alone
• pre_tasks, post_tasks
• import_playbook: webservers.yml

Galaxy

ansible-galaxy install -p roles -r requirements.yml
ansible-galaxy init app.test

Working with Inventory

• Hosts and Groups
• Host Variables
• Group Variables
• Groups of Groups, and Group Variables

Working With Playbooks

Errors:

Failed to connect to the host via ssh, WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!

• sudo nano ~/.ssh/known_hosts, remove some known_hosts related to these hosts above
• install sshpass sudo apt-get install sshpass
• add host_key_checking=False into ansible.cfg

[defaults]
host_key_checking=False

• tmr solution: specify -u vagrant -k and type password vagrant by default

Vagrant: shared folder error

vagrant plugin install vagrant-vbguest

Questions

• ssh, yum packages: https://github.com/phongnx1/ansible-docker-training/blob/master/Vagrantfile