Lab 16: The ‘Port’ Command

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The docker-compose port command print the public/network facing port for a service.

Pre-requisite:

Tested Infrastructure

Platform	Number of Instance	Reading Time
Play with Docker	1	5 min

Pre-requisite

Create an account with DockerHub
Open PWD Platform on your browser
Click on Add New Instance on the left side of the screen to bring up Alpine OS instance on the right side

Assignment

Create a docker-compose.yml file
Bringing up the containers
Listout the services
Check the external port binded to service webserver for port 80

Create a docker-compose.yml file

version: '3.7'
services:
  #Nginx Service
   webserver:
     image: nginx:alpine
     container_name: Nginx
     restart: unless-stopped
     ports:
       - "8080:80"
       - "443:443"
   dbserver:
     image: mysql:5.7
     container_name: Mysqldb
     restart: unless-stopped
     ports:
       - "3306:3306"
     environment:
       MYSQL_ROOT_PASSWORD: Pa$$w0rd
       MYSQL_USER: test
       MYSQL_PASSWORD: Pa$$w0rd123
       MYSQL_DATABASE: test 
     volumes:
       - db_data:/var/lib/mysql
volumes:
  db_data:

Bringing up the containers

$ docker-compose up -d

Checking container status

$ docker-compose ps
 Name               Command             State                    Ports                  
----------------------------------------------------------------------------------------
Mysqldb   docker-entrypoint.sh mysqld   Up      0.0.0.0:3306->3306/tcp, 33060/tcp       
Nginx     nginx -g daemon off;          Up      0.0.0.0:443->443/tcp, 0.0.0.0:80->80/tcp   

Listout the services

$ docker-compose ps --services
webserver
dbserver

Check the external port binded to service webserver for port 80

$ docker-compose port webserver 80
0.0.0.0:8080

Lab 16: The ‘Port’ Command

Pre-requisite:

Tested Infrastructure

Pre-requisite

Assignment

Create a docker-compose.yml file

Bringing up the containers

Checking container status

Listout the services

Check the external port binded to service webserver for port 80

Lab 16: The ‘Port’ Command

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