Deploy MariaDB via Docker

Install MariaDB in a Docker container

You can deploy MariaDB in a Docker container using Ansible.

Before you begin

For this section you will need a computer which has Ansible installed. You can use the same SSH key pair. You also need a cloud instance or VM, or a physical machine with Ubuntu installed, running and ready to deploy MariaDB.

Deploy a MariaDB container using Ansible

Docker is an open platform for developing, shipping, and running applications. Docker enables you to separate your applications from your infrastructure so you can deliver software quickly. If you are new to Docker, consider reviewing Learn how to use Docker .

To run Ansible, you can use an Ansible playbook. The playbook uses the community.docker collection to deploy MariaDB in a container.

The playbook maps the container port to the host port, which is 3306.

1. Use a text editor to add the contents below to a new file named playbook.yml.

    

        
        
---
- hosts: all
  remote_user: root
  become: true
  tasks:
    - name: Update the Machine and Install dependencies
      shell: |
             apt-get update -y
             apt-get -y install mariadb-client
             curl -fsSL get.docker.com -o get-docker.sh && sh get-docker.sh
             usermod -aG docker ubuntu ; newgrp docker
             apt-get -y install python3-pip
             pip3 install PyMySQL
             pip3 install docker
      become: true
    - name: Reset ssh connection for changes to take effect
      meta: "reset_connection"
    - name: Log into DockerHub
      community.docker.docker_login:
        username: {{dockerhub_uname}}
        password: {{dockerhub_pass}}
    - name: Deploy mariadb docker container
      docker_container:
        image: mariadb:latest
        name: mariadb_test
        state: started
        ports:
          - "3306:3306"
        pull: true
        volumes:
         - "db_data:/var/lib/mysql:rw"
         - "mariadb-socket:/var/run/mysqld:rw"
         - "/tmp:/tmp:rw"
        restart: true
        env:
          MARIADB_ROOT_PASSWORD: {{your_mariadb_password}}
          MARIADB_USER: local_us
          MARIADB_PASSWORD: Armtest123
          MARIADB_DATABASE: arm_test

    

2. Edit playbook.yml to use your values

Replace {{your_mariadb_password}} with your own password.

Also, replace {{dockerhub_uname}} and {{dockerhub_pass}} with your Docker Hub credentials.

3. Create a inventory.txt file and copy the contents given below:

    

        
        
[all]
ansible-target1 ansible_connection=ssh ansible_host={{public_ip of VM where MariaDB to be deployed}} ansible_user={{user_of VM where MariaDB to be deployed}}

    

4. Edit inventory.txt to use your values

Replace {{public_ip of VM where MariaDB to be deployed}} and {{user_of VM where MariaDB to be deployed}} with your own values.

Ansible Commands

1. Run the playbook using the ansible-playbook command:

    

        
        
ansible-playbook playbook.yaml -i {your_inventory_file_location}

    

2. Answer yes when prompted for the SSH connection.

Deployment may take a few minutes.

The output should be similar to:

    

        
        PLAY [all] *****************************************************************************************************************************************************

TASK [Gathering Facts] *****************************************************************************************************************************************
The authenticity of host '3.19.242.129 (3.19.242.129)' can't be established.
ED25519 key fingerprint is SHA256:uWZgVeACoIxRDQ9TrqbpnjUz14x57jTca6iASH3gU7M.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
ok: [ansible-target1]

TASK [Update the Machine and install docker dependencies] *************************************************************************************************************
changed: [ansible-target1]

TASK [Reset ssh connection for changes to take effect] ****************************************************************************************************************

TASK [Log into DockerHub] *********************************************************************************************************************************************
changed: [ansible-target1]

TASK [Deploy mariadb docker containere] *******************************************************************************************************************************
changed: [ansible-target1]

PLAY RECAP ************************************************************************************************************************************************************
ansible-target1            : ok=3    changed=4    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

        
    

Connect to Database using your local machine

You can use the instructions from the previous topic to connect to the database and confirm the Docker container deployment is working.