Containerization of apps is a fast-growing practice as many companies are embracing the cloud and DevOps concepts. Docker packages an application, libraries, and its dependencies in a virtual container that can run on any server. Being that most applications do not run on one single component (even dinosaur apps 🦖 have frontend and backend components), we need a way to define and manage multi-container apps.
In this tutorial I will utilize Docker compose to get a blog up and running that consists of a Ghost Blog service and a MYSQL service; both services will use volumes for persistent storage. This tutorial assumes you have working knowledge of Docker and a server with Docker and Docker compose installed.
What is Docker Compose?
Compose is a file format for describing distributed Docker apps, and it’s a tool for managing them.
What is Ghost?
Ghost is a free and open source blogging platform written in Javascript.
Let’s go! 🐳
Step 1 — Login to the server and become root
1. SSH into the server and become root
ssh <username>@PUBLIC\_IP\_ADDRESS
sudo su -
Step 2 — Create a Ghost Blog and MySQL service
2. Create a docker-compose.yml file in the root directory
vi docker-compose.yml
Add the following contents
version: '3'
services:
ghost:
image: ghost:1-alpine
container_name: ghost-blog
restart: always
ports:
- 80:2368
environment:
database__client: mysql
database__connection__host: mysql
database__connection__user: root
database__connection__password: P4sSw0rd0!
database__connection__database: ghost
volumes:
- ghost-volume:/var/lib/ghost
depends_on:
- mysql
mysql:
image: mysql:5.7
container_name: ghost-db
restart: always
environment:
MYSQL_ROOT_PASSWORD: P4sSw0rd0!
volumes:
- mysql-volume:/var/lib/mysql
volumes:
ghost-volume:
mysql-volume:
Step 3 — Start up the Docker compose service and Bring up the Ghost Blog
3. docker-compose up -d
Congrats your blog is up and running! Validate via the public IP address of your Docker server.
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