Ansible boilerplate and tricks

This repository demonstrates the working mechanism of Ansible. It contains two Dockerfiles: control.Dockerfile to build the Ansible control container (with Python3, ssh-client and Ansible installed) and node.Dockerfile to build the node containers (with an 'ansible' sudo user, ssh-server and Python3 installed). It has a docker-compose.yml file which builds 3 services: the Ansible control and two nodes. After a successful docker-compose up you may exec into the control container and execute an Ansible playbook locally, which prepares the container for accessing the nodes via ssh. Then you can run two different playbooks against the nodes: one that just prints out their inventory-name (proving that Ansible can reach these hosts), and another which deploys a simple http web service on them.

Build and run the ansible-control and the two ansible-node containers
docker-compose up --build

Exec into the ansible-control container
docker exec -it <container_id> bash

Prepare the ansible-control container with
ansible-playbook prepare-control.yml

Run test playbook on ansible-nodes
ansible-playbook -i inventory.yml remote-test.yml

Run webserver playbook on ansible-nodes
ansible-playbook -i inventory.yml remote-playbook.yml

After successfully running all the three playbooks ansible-node-1 should be accessible at http://localhost:7070 and ansible-node-2 at http://localhost:9090