To install the basic Docker please follow this article:

How to install Docker 

Now lets deploy the first application, How to deploy wordpress in Docker.

1-What we need

WordPress needs a LAMP stack to run. In this process, we are splitting that LAMP stack into two containers: one that runs the database (MySQL or MariaDB), and one that runs the webserver (PHP with Apache or PHP with Nginx).

Paste the YAML configuration  like this:

vi Install-wordpress.yaml

add the following :

version: '3.1'

services:

wordpress:
image: wordpress
restart: always
ports:
- 8080:80
environment:
WORDPRESS_DB_PASSWORD: example

mysql:
image: mysql:8
command: '--default-authentication-plugin=mysql_native_password'
# common options
restart: always
environment:
MYSQL_ROOT_PASSWORD: example

save and exit

docker-compose up will  build the images/containers for you and will bring everything up in seconds.

2-Install Docker-composer

Docker-composer orchestrator dont exist on basic repo of Centos . to do this you need to add the epel repos

 yum install epel-release

yum install docker-compose

To user docker-compse orchestrator you have to use the created yaml configuration file.

Lets  start

[root@osradar ~]# docker-compose -f Install-wordpress.yaml up &
Pulling mysql (mysql:8)...
Trying to pull repository docker.io/library/mysql ...
8: Pulling from docker.io/library/mysql
6ae821421a7d: Pull complete
a9e976e3aa6d: Pull complete
e3735e44a020: Pull complete
bfd564e9483f: Pull complete
df705f26e488: Pull complete
0c5547f73d62: Pull complete
f437382cf8a1: Pull complete
b8e2d50f1513: Pull complete
e2e3c9928180: Pull complete
b60db6d282cd: Pull complete
1d32deab69c6: Pull complete
408a40cd2e9c: Pull complete
Digest: sha256:a571337738c9205427c80748e165eca88edc5a1157f8b8d545fa127fc3e29269
Status: Downloaded newer image for docker.io/mysql:8
Pulling wordpress (wordpress:latest)...
Trying to pull repository docker.io/library/wordpress ...
latest: Pulling from docker.io/library/wordpress

3-Start The Configuration

Check if the containers are Up

[root@osradar ~]# docker container ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
908afa6b30e5 wordpress "docker-entrypoint..." 55 minutes ago Up 41 minutes 0.0.0.0:8080->80/tcp root_wordpress_1
6fe7fb727fc8 mysql:8 "docker-entrypoint..." 55 minutes ago Up 41 minutes 3306/tcp, 33060/tcp root_mysql_1
[root@osradar ~]#

lunch  the browser  to  IP:8080 to  go a head   for  the  installation :

How to Access The WordPress  Files  in Docker

docker exec -it Container-ID  “/bin/bash”

How to Edit WordPress files in Docker

Docker containers are debian based  , you can use command apt or apt-get to   install packages

apt-get  update &  apt-get  install  vim nano

How to access mysql Container and check the database

apt-get  update &  apt-get  mysql-client

Connect to the database using  user root  , password is example

root@6fe7fb727fc8:/# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 21
Server version: 8.0.15 MySQL Community Server - GPL

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sys |
| wordpress |
+--------------------+
5 rows in set (0.00 sec)

Notice :  To detach the tty without exiting the shell, use the escape sequence Ctrl+p + Ctrl+q

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