Docker with Ansible

Task 10 Description:-                      

               🔰 Write an Ansible Playbook that doEs the following operations in the managed nodes:-

1.  Configure Docker
2.  Start and enable Docker services
3.  Pull the httpd server image from the Docker Hub
4.  Run the httpd container and expose it to the public
5.  Copy the HTML code in /var/www/HTML directory and start the webserver.

Ansible Playbook that does the following operations in the managed nodes:-

1. Configuring yum
2. Creating a folder and mounting the cdrom
3. creating repo dvd. repo and dvd1.repo

- name : task_1

gather_facts: No

hosts: server1

Task:

    -name: create_dvd_folder

    file:

        path: /dvd

        state: directory

        mode:"0755"

    

    - name: mount_dvd

      mount:

        path: /dvd/

        src: /dev/cdrom

        fstype: iso9660

        opts: ro,loop

        state: mounted

    - name: yum_repo_BaseOS

       yum_repository:

         name: BaseOS

         description: Local_baseos

         file: dvd1

         baseurl: file:///dvd/BaseOS

         gpgcheck: no

    - name: yum_repo_AppStream

        yum_repository:

          name: AppStream

          description: Local_appstream

          file: dvd2

          baseurl: file:///dvd/AppStream

          gpgcheck: no 

Removing unwanted package pre-created if any:- 

  - name: Remove docker if installed from CentOS repo

     yum:

       name:

        - docker

        - docker-client

        - docker-client-latest

        - docker-common

        - docker-latest

        - docker-latest-logrotate

        - docker-logrotate

        - docker-engine

       state: removed

Installing dependencies :-

   - name: Install yum utils

     yum:

       name: yum-utils

       state: latest

   - name: Install device-mapper-persistent-data

     yum:

       name: device-mapper-persistent-data

       state: latest

   - name: Install lvm2

     yum:

       name: lvm2

       state: latest

Configure docker-ce. repo and installing docker using the shell as well as using ansible:-

   - name: Add Docker repo

     get_url:

        url: https://download.docker.com/linux/centos/docker-ce.repo

        dest: /etc/yum.repos.d/docker-ce.repo

     become: yes

   - name: Enable Docker Edge repo

     ini_file:

       dest: /etc/yum.repos.d/docker-ce.repo

       section: 'docker-ce-edge'

       option: enabled

       value: 0

     become: yes

   - name: Enable Docker Test repo

     ini_file:

       dest: /etc/yum.repos.d/docker-ce.repo

       section: 'docker-ce-test'

       option: enabled

       value: 0

     become: yes

   - name: Install Docker

     shell: "dnf install --nobest docker-ce -y"

        Or

   - name: Install Docker

     package:

       name: docker-ce

       state: latest

    become: yes

Starting docker service and installation of required packages 

   - name: Start Docker service

     service:

       name: docker

       state: started

       enabled: yes

     become: yes

   - pip3:

       name: "docker-py"

       executable: pip2.7

       state: present

      Or 

   - name: docker-py

     shell: "pip3 install docker"

Pulling the docker image and creating the container for starting the services with mounting the data and exporting the port :-   

   - name: pull an image

     docker_image:

       name: httpd

       source: pull

   - name: creating a httpd container

     docker_container:

       name: myhttpd

       image: httpd

       state: started

       published_ports: "6379:80"

       volumes: "/var/www/html/:/usr/local/apache2/htdocs/:ro"