Create An Ansible Playbook to Retrieve the Container IP and update the Inventory File & Configure the Webserver.

Let's First Build An Docker Image In such a way so that we can do SSH to it. We can do either manually or by the help of DockerFile ;

Manually Configuring

OR

FROM centos:latest
RUN yum install net-tools -y
RUN yum install openssh-server -y
RUN ssh-keygen -A
RUN yum install passwd -y
CMD echo redhat | passwd root --stdin
CMD /usr/sbin/sshd

Now, let's Build the Image and Lunch it. We can also build & run this container with the help of the Ansible.

Now, let's Create the Playbook which will Dynamically Retrieve the Name and IP of the running Container and also update the Inventory File !!

- hosts: localhost
tasks:
- name:  Getting the Docker Container Name
    shell: "docker ps --format '{% raw %}{{ .Names }}{% endraw %}'"
    register: Docker_name
- name: Getting the IP of Docker Container
    shell: "docker inspect --format '{%raw %}{{ .NetworkSettings.IPAddress }}{% endraw %}' $(docker ps --format '{% raw %}{{ .Names }}{% endraw %}')"
    register: Docker_IP
- name: Updating the Inventory File
    blockinfile:
      path: /root/dbIP/docker
      block: |
        {% raw %}[{% endraw %}{{ Docker_name.stdout }}{%raw %}]{% endraw %}
        {{ Docker_IP.stdout }} ansible_ssh_user=root ansible_ssh_pass=redhat

Here, We are running this Playbook at localhost because Our BaseOS is working as Docker Engine.

Updated Inventory File

Let's Configure the Webserver on the Fetched data of a Container !!

For this Configuration, I am Going to use the Role of WebServer →

How we can convert our ansible PlayBook to Role ? 🤔