The Nautilus Application development team recently finished development of one of the apps that they want to deploy on a containerized platform. The Nautilus Application development and DevOps teams met to discuss some of the basic pre-requisites and requirements to complete the deployment. The team wants to test the deployment on one of the app servers before going live and set up a complete containerized stack using a docker compose fie. Below are the details of the task:

  1. On App Server 2 in Stratos Datacenter create a docker compose file /opt/sysops/docker-compose.yml (should be named exactly).
  2. The compose should deploy two services (web and DB), and each service should deploy a container as per details below:

For web service:

a. Container name must be php_host.

b. Use image php with any apache tag. Check here for more details.

c. Map php_host container's port 80 with host port 3000

d. Map php_host container's /var/www/html volume with host volume /var/www/html.

For DB service:

a. Container name must be mysql_host.

b. Use image mariadb with any tag (preferably latest). Check here for more details.

c. Map mysql_host container's port 3306 with host port 3306

d. Map mysql_host container's /var/lib/mysql volume with host volume /var/lib/mysql.

e. Set MYSQL_DATABASE=database_host and use any custom user ( except root ) with some complex password for DB connections.

  1. After running docker-compose up you can access the app with curl command curl <server-ip or hostname>:3000/

For more details check here.

Note: Once you click on FINISH button, all currently running/stopped containers will be destroyed and stack will be deployed again using your compose file.

Connect to App Server 2 

ssh steve@stapp02 sudo -i

Password for steve: Am3ric@

Create the Compose Directory 

mkdir -p /opt/sysops

Create the Docker Compose File 

vi /opt/sysops/docker-compose.yml

Add the following content:

version: "3.8" services: web: image: php:8.2-apache container_name: php_host ports: - "3000:80" volumes: - /var/www/html:/var/www/html depends_on: - db db: image: mariadb:latest container_name: mysql_host ports: - "3306:3306" volumes: - /var/lib/mysql:/var/lib/mysql environment: MYSQL_DATABASE: database_host MYSQL_USER: nautilus_user MYSQL_PASSWORD: S3cur3P@ssw0rd! MYSQL_ROOT_PASSWORD: R00tP@ssw0rd!

Verify the Compose File 

cat /opt/sysops/docker-compose.yml

Output:

version: "3.8" services: web: image: php:8.2-apache container_name: php_host ports: - "3000:80" volumes: - /var/www/html:/var/www/html depends_on: - db db: image: mariadb:latest container_name: mysql_host ports: - "3306:3306" volumes: - /var/lib/mysql:/var/lib/mysql environment: MYSQL_DATABASE: database_host MYSQL_USER: nautilus_user MYSQL_PASSWORD: S3cur3P@ssw0rd! MYSQL_ROOT_PASSWORD: R00tP@ssw0rd!

Validate the Compose Configuration 

cd /opt/sysops docker compose config

Output:

WARN[0000] /opt/sysops/docker-compose.yml: the attribute `version` is obsolete, it will be ignored, please remove it to avoid potential confusion name: sysops services: db: container_name: mysql_host environment: MYSQL_DATABASE: database_host MYSQL_PASSWORD: S3cur3P@ssw0rd! MYSQL_ROOT_PASSWORD: R00tP@ssw0rd! MYSQL_USER: nautilus_user image: mariadb:latest networks: default: null ports: - mode: ingress target: 3306 published: "3306" protocol: tcp volumes: - type: bind source: /var/lib/mysql target: /var/lib/mysql bind: {} web: container_name: php_host depends_on: db: condition: service_started required: true image: php:8.2-apache networks: default: null ports: - mode: ingress target: 80 published: "3000" protocol: tcp volumes: - type: bind source: /var/www/html target: /var/www/html bind: {} networks: default: name: sysops_default

The configuration validates successfully. The version attribute warning is informational only and does not affect the deployment.

Deploy the Stack 

docker compose up -d

Output:

WARN[0000] /opt/sysops/docker-compose.yml: the attribute `version` is obsolete, it will be ignored, please remove it to avoid potential confusion [+] up 29/29 ✔ Image mariadb:latest Pulled 11.5s ✔ Image php:8.2-apache Pulled 13.5s ✔ Network sysops_default Created 0.1s ✔ Container mysql_host Created 0.1s ✔ Container php_host Created 0.1s

Both images were pulled, the network was created, and both containers were started.

Verify the Containers Are Running 

docker compose ps

Output:

NAME IMAGE COMMAND SERVICE CREATED STATUS PORTS mysql_host mariadb:latest "docker-entrypoint.s…" db 4 seconds ago Up 2 seconds 0.0.0.0:3306->3306/tcp, [::]:3306->3306/tcp php_host php:8.2-apache "docker-php-entrypoi…" web 4 seconds ago Up 2 seconds 0.0.0.0:3000->80/tcp, [::]:3000->80/tcp

Both containers are running with the correct names and port mappings.

Test the Web Service 

curl -I http://localhost:3000/

Output:

HTTP/1.1 200 OK Date: Thu, 29 Oct 2026 08:57:43 GMT Server: Apache/2.4.69 (Debian) X-Powered-By: PHP/8.2.35 Content-Type: text/html; charset=UTF-8

The HTTP 200 OK response confirms the PHP/Apache container is accessible on host port 3000 and running PHP 8.2.35.

Complete Command Sequence 

ssh steve@stapp02 sudo -i mkdir -p /opt/sysops cat > /opt/sysops/docker-compose.yml << 'EOF' version: "3.8" services: web: image: php:8.2-apache container_name: php_host ports: - "3000:80" volumes: - /var/www/html:/var/www/html depends_on: - db db: image: mariadb:latest container_name: mysql_host ports: - "3306:3306" volumes: - /var/lib/mysql:/var/lib/mysql environment: MYSQL_DATABASE: database_host MYSQL_USER: nautilus_user MYSQL_PASSWORD: S3cur3P@ssw0rd! MYSQL_ROOT_PASSWORD: R00tP@ssw0rd! EOF cd /opt/sysops docker compose config docker compose up -d docker compose ps curl -I http://localhost:3000/