Ansible is a simple IT automation engine that automates cloud provisioning, configuration management, application deployment, intra-service orchestration, and many other IT needs.
Ansible works by connecting to your nodes and pushing out small programs, called "Ansible modules" to them. These programs are written to be resource models of the desired state of the system. Ansible then executes these modules (over SSH by default), and removes them when finished.
Ansible has the option to import multiple playbooks into a single one using the method:
/playbooks/main.yml --- - name: Playbook_1 import_playbook: 00-playbook-1.yml - name: Playbook_2 import_playbook: 01-playbook-2.yml
When you execute
ansible-playbook playbooks/main.yml Ansible will execute first the Playbook1, and then Playbook 2.
We're going through an example to see it in action
The first playbook executes a ping into your servers:
/playbooks/00-ping.yml --- - hosts: all tasks: - name: Ping All Servers action: ping - debug: msg="Success"
The second playbook upgrades all your yum packages:
/playbooks/01-upgrade.yml --- - hosts: all tasks: - name: upgrade all packages become: yes yum: name: '*' state: latest
The third playbook download a node binary distribution:
/playbooks/02-download-node.yml --- - hosts: all tasks: - name: Download node binary distro shell: curl sL https://rpm.nodesource.com/setup_12.x | sudo bash -
The fourth playbook install node:
/playbooks/03-install-node.yml --- - hosts: all tasks: - name: Install Node become: yes yum: name: nodejs state: present
The fifth playbook copy your app into the remote servers:
/playbooks/04-provisioning.yml --- - hosts: all tasks: - name: Copy app files copy: src: ~/documents/my-app-folder/ dest: /home/ec2-user/my-app force: no - debug: msg="Success"
And finally you need to install dependencies based on your package-json:
/playbooks/05-install-dependencies.yml --- - hosts: all tasks: - name: Install packages based on package.json. npm: path: /home/ec2-user/my-app
Once you have all your playbooks ready, if you want to execute all of them in the desired order you need to create a main playbook, and import all of them as follow:
/playbooks/main.yml --- - name: Ping import_playbook: 00-ping.yml - name: Update import_playbook: 01-update.yml - name: Download Node import_playbook: 02-download-node.yml - name: Install Node import_playbook: 03-install-node.yml - name: Provisioning import_playbook: 04-provisioning.yml - name: Install Dependencies import_playbook: 05-install-dependencies.yml
That's it. You are ready to execute
ansible-playbook playbooks/main.yml and you'll upgrade all your packages, download and install node, provision all your selected servers, and install your dependencies.