Two instances of same application with docker-compose

[skola0302]

Hi All,

I am currently running docker-compose version 1.18.0, build 8dd22a9

I have an application TEST (Version 1) which is running on a Linux server. When I need to start the application I use “docker-compose up -d” command. I have docker-compose.yml that lists nginx and tomcat(connects to external DB) on port 80:80, 443:443

I want to have another instance of application TEST but Version 2, I want TEST-version1 and TEST-version2 to run simultaneously from the same server on a different port so users can access both. How can I do that with docker-compose ?

Thank you

[tekki]

@skola0302

I want TEST-version1 and TEST-version2 to run simultaneously from the same server on a different port so users can access both.

Instead of hard-coding the ports you could set environment variables in a .env file and use them in the compose file. Read Variable substitution in the docs.

[meyay (Metin Y.)]

This thread might discuss the same problem and might provide an approach to solve your problem:

How to run multiple WordPress instances using docker?

Here is an example of what I mean: Copy the content of this block into a file called docker-compose.template: version: "3.3" services: # Database ${MYSQL_SERVICE_NAME}: image: mysql:5.7 volumes: - ${MYSQL_VOLUME_DATA}:/var/lib/mysql restart: always environment: MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD} MYSQL_DATABASE: ${MYSQL_DATABASE} MYSQL_USER: ${MYSQL_USER} MYSQL_PASSWORD: ${MYSQL_PASSWORD} # phpmyadmin ${PHPMYADMIN_SERVICE_NAME}: …

[hholst80]

Use fixed ports for the production environment and use dynamic ports for the other environment files. Use docker-compose port to find out the dynamic ports.

$ docker-compose port
Print the public port for a port binding.

Usage: port [options] SERVICE PRIVATE_PORT

Options:
    --protocol=proto  tcp or udp [default: tcp]
    --index=index     index of the container if there are multiple
                      instances of a service [default: 1]