Multiple docker containers on same server

I might be missing something but please help me understand this. I am trying to use this script to install nextcloud and it works just fine for the first time. Now, I want to use the same script, on the same VM and install another docker for nextcloud. My questions -

What all values should I change in what all files to make this happen?
Where is it defined that the port number for nextcloud is 80 and that of ssl is 443. Can I change this and have multiple containers running on the same machine?

Please help me here!

2\. Where is it defined that the port number for nextcloud is 80 and that of ssl is 443.

That is defined in the traefik.toml line 6 & 11.

nextcloud_on_docker/roles/docker_container/templates/traefik.toml.j2

Line 6 in bab3d3b

address = ":80"

nextcloud_on_docker/roles/docker_container/templates/traefik.toml.j2

Line 11 in bab3d3b

address = ":443"

2\. Can I change this and have multiple containers running on the same machine?

With a lot of work. Maybe.

If you want to run different nextcloud instances on different ports you have to define for each one another entrypoint. Like it's done for onlyoffice.

nextcloud_on_docker/roles/docker_container/templates/traefik.toml.j2

Line 29 in bab3d3b

[entryPoints.onlyoffice]

So traefik will listen on all these ports. That's the easy part.

Now you have to find all container tasks needed to setup a nextcloud instance.

nextcloud_on_docker/roles/docker_container/tasks/nextcloud.yml

Line 32 in bab3d3b

docker_container:

That is at least nextcloud + nginx (in case you use the fpm container).

You have to give the container different namens (nextcloud00, nextcloud01, nextcloud02, ...)

nextcloud_on_docker/roles/docker_container/tasks/nextcloud.yml

Line 33 in bab3d3b

name: nextcloud

You have to make sure that they all use different data and config folders

nextcloud_on_docker/roles/docker_container/tasks/nextcloud.yml

Line 40 in bab3d3b

volumes:

and you have to modify the config tasks.

nextcloud_on_docker/roles/nextcloud_config/tasks/main.yml

Line 10 in bab3d3b

docker exec --user www-data nextcloud php occ maintenance:install

as you can see in the command above the container name is always "nextcloud".

When I was writing this playbook I didn't had a multi nextcloud environment in mind.

The good news: You look at the playbook ReinerNippes/selfhosted_on_docker.

There you can define a set of nextcloud instances.

  - name: nextcloud00
    type: nextcloud
    server_fqdn: nextcloud00.{{ base_domain }}
    collabora:   true
    collabora_dictionaries: "de_DE en_GB en_US es_ES fr_FR it nl pt_BR pt_PT ru"
    onlyoffice:  true
    talk:        true
    talk_server: base.{{ base_domain }}
  - name: nextcloud01
    type: nextcloud
    server_fqdn: nextcloud01.{{ base_domain }}
    collabora:   true
    collabora_dictionaries: "de_DE en_GB en_US es_ES fr_FR it nl pt_BR pt_PT ru"
    onlyoffice:  true
    talk:        true
    talk_server: base.{{ base_domain }}
  - name: nextcloud02
    type: nextcloud
    server_fqdn: nextcloud02.{{ base_domain }}
    collabora:   true
    collabora_dictionaries: "de_DE en_GB en_US es_ES fr_FR it nl pt_BR pt_PT ru"
    onlyoffice:  true
    talk:        true
    talk_server: base.{{ base_domain }}

Nevertheless they won't run on different ports but different dns names.