Docker - Compose

   
   
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Table of Content

Preface

Goal: Setting-up docker-compose to run phpmyadmin.

We need to see how we can use docker in real life with docker-compose to setup a phpmyadmin site in localhost.

Summary

As a summary, the command we need to use is as simple as these below:

❯ docker compose pull
[+] Running 2/2
 ⠿ phpmyadmin Pulled                               2.9s
 ⠿ db Pulled                                       2.9s
❯ docker compose up -d
[+] Running 2/2
 ⠿ Container db   Started                          0.4s
 ⠿ Container pma  Started                          0.8s
❯ docker ps -a --format 'table {{.Names}}\t{{.Status}}'
NAMES     STATUS
pma       Up 8 seconds
db        Up 8 seconds
❯ docker compose stop
[+] Running 2/2
 ⠿ Container pma  Stopped                          1.2s
 ⠿ Container db   Stopped                          1.4s
❯ docker ps -a --format 'table {{.Names}}\t{{.Status}}'
NAMES     STATUS
pma       Exited (0) 4 seconds ago
db        Exited (0) 2 seconds ago
❯ docker compose rm -f
Going to remove pma, db
[+] Running 2/0
 ⠿ Container db   Removed                          0.0s
 ⠿ Container pma  Removed                          0.0s
❯ docker ps -a --format 'table {{.Names}}\t{{.Status}}'
NAMES     STATUS
❯ docker compose down
[+] Running 1/1
 ⠿ Network dockerngadimin_default  Removed       0.1s
❯ docker-compose build --pull

Docker Compose: CLI Summary

The output while the docker running is as below:

Docker Compose: PHPMyAdmin Screenshot

Installation

We need to install one more package.

❯ sudo pacman -S docker-compose
resolving dependencies...
looking for conflicting packages...

Packages (1) docker-compose-2.16.0-1

Total Installed Size:  49.87 MiB

:: Proceed with installation? [Y/n] y
(1/1) checking keys in keyring                    
(1/1) checking package integrity                  
(1/1) loading package files                       
(1/1) checking for file conflicts                 
(1/1) checking available disk space               
:: Processing package changes...
(1/1) installing docker-compose

Docker Setup: Pacman: Docker Compose

Configuration

For this example, I copy-paste the configuration from site below:

Consider make a new directory for our new project. PHPMyAdmin in Docker.

❯ mkdir dockerngadimin
❯ cd dockerngadimin

and make new file named docker-compose.yml. The YAML configuration would be as below:

version: '3'
 
services:
  db:
    image: mysql:5.7
    container_name: db
    environment:
      MYSQL_ROOT_PASSWORD: blewah
      MYSQL_DATABASE: app_db
      MYSQL_USER: db_user
      MYSQL_PASSWORD: db_user_pass
    ports:
      - "6033:3306"
    volumes:
      - dbdata:/var/lib/mysql
  phpmyadmin:
    image: phpmyadmin/phpmyadmin
    container_name: pma
    links:
      - db
    environment:
      PMA_HOST: db
      PMA_PORT: 3306
      PMA_ARBITRARY: 1
    restart: always
    ports:
      - 8081:80
volumes:
  dbdata:

Docker Compose: docker-compose.yml

In that directory you can start with, pulling the docker image into your linux system.

❯ docker-compose pull
[+] Running 31/2
 ⠿ db Pulled                                    39.1s
 ⠿ phpmyadmin Pulled                            27.9s

Docker Compose: First Pull

The first pull will download the docker image. This might take a few seconds long.

❯ sudo pacman -S docker-compose resolving dependencies… looking for conflicting packages…

Packages (1) docker-compose-2.16.0-1

Total Installed Size: 49.87 MiB

:: Proceed with installation? [Y/n] y (1/1) checking keys in keyring
(1/1) checking package integrity
(1/1) loading package files
(1/1) checking for file conflicts
(1/1) checking available disk space
:: Processing package changes… (1/1) installing docker-compose

Case: PHPMyAdmin

Consider have case, such as having phpmyadmin installed as docker. This way, we do not pollute the main system. We can break down the step one by one.

Pull

We can start by pulling the docker.

❯ docker compose pull
[+] Running 2/2
 ⠿ phpmyadmin Pulled                             3.0s
 ⠿ db Pulled                                     3.0s

Docker Compose: Pull

Up as Daemon

Then running as service

❯ docker compose up -d
[+] Running 2/2
 ⠿ Container db   Started                        0.4s
 ⠿ Container pma  Started                        0.8s

Docker Compose: Up as Daemon

Preview in Browser

Now we can open the PHPMyAdmin in any browser.

Docker Compose: PHPMyAdmin Screenshot

❯ docker compose stop
[+] Running 2/2
 ⠿ Container pma  Stopped                        1.2s
 ⠿ Container db   Stopped                        1.4s

Stop

You don’t need to stop the process. But if you wish, you can just stop the daemon, for local directory.

Docker Compose: Stop

❯ docker compose rm -f
Going to remove pma, db
[+] Running 2/0
 ⠿ Container db   Removed                        0.0s
 ⠿ Container pma  Removed                        0.0s

Docker Compose: Remove

After stopping, the docker process would show nothing.

❯ docker ps -a --format 'table {{.Names}}\t{{.Status}}'
NAMES     STATUS

Docker Compose: Process Table

Down

I’m not sure about this.

❯ docker compose down
[+] Running 1/1
 ⠿ Network dockerngadimin_default  Removed       0.1s

Docker Compose: Down

I just like to issue some command.

What is Next 🤔?

You might be interested in see what happened to the docker image.

Consider continue reading [ Docker - Image ].

Thank you for reading.