nextcloud_db is missing

[AMDFreak2006]

When activating the Checkbox for NextCloud installation in the menu.sh script, the generated docker-compose.yml includes a part for nextcloud but not for the nextcloud_db, resutling in a missing dependency.

[Paraphraser]

I just did the following:

$ cd ~/IOTstack
$ docker-compose down
$ cd ..
$ mv IOTstack IOTstack.off
$ git clone https://github.com/SensorsIot/IOTstack.git
$ cd IOTstack
$ ./menu.sh 
$ cat docker-compose.yml 

The result of the cat:

networks:
  default:
    driver: bridge
    ipam:
      driver: default
  nextcloud:
    driver: bridge
    internal: true
    ipam:
      driver: default

services:
  nextcloud:
    container_name: nextcloud
    image: nextcloud
    restart: unless-stopped
    environment:
    - TZ=${TZ:-Etc/UTC}
    - MYSQL_HOST=nextcloud_db
    - MYSQL_PASSWORD=IOtSt4ckmySqlDbPw
    - MYSQL_DATABASE=nextcloud
    - MYSQL_USER=nextcloud
    ports:
    - "9321:80"
    - "9343:443"
    volumes:
    - ./volumes/nextcloud/html:/var/www/html
    depends_on:
    - nextcloud_db
    networks:
    - default
    - nextcloud

  nextcloud_db:
    container_name: nextcloud_db
    build: ./.templates/mariadb/.
    restart: unless-stopped
    environment:
    - TZ=${TZ:-Etc/UTC}
    - PUID=1000
    - PGID=1000
    - MYSQL_ROOT_PASSWORD=IOtSt4ckToorMySqlDb
    - MYSQL_PASSWORD=IOtSt4ckmySqlDbPw
    - MYSQL_DATABASE=nextcloud
    - MYSQL_USER=nextcloud
    volumes:
    - ./volumes/nextcloud/db:/config
    - ./volumes/nextcloud/db_backup:/backup
    networks:
    - nextcloud

Then:

$ docker-compose up -d
$ docker ps
CONTAINER ID   IMAGE                   COMMAND                  CREATED         STATUS                     PORTS                                         NAMES
1fa7d01b4eb8   nextcloud               "/entrypoint.sh apac…"   3 minutes ago   Up 3 minutes               0.0.0.0:9321->80/tcp, 0.0.0.0:9343->443/tcp   nextcloud
1fdb7ce8db54   iotstack-nextcloud_db   "/init"                  3 minutes ago   Up 3 minutes (unhealthy)                                                 nextcloud_db

However, when I attempted to use the menu to add NextCloud to an existing stack, I got the same error as you are seeing.

The menu system is a great way of getting your first stack up and running but I've long been of the view that it's somewhere between suboptimal and problematic as a maintenance tool. What I generally advise is (a) recognising that, at its core, the menu is just a concatenation tool, and (b) studying how everything inside the IOTstack folder is set up and then rolling your own.

The quickest path to a solution is to open your docker-compose.yml in a text editor, find the nextcloud service definition that was just added by the menu and remove all those lines. Then, instead of using the menu, do this:

$ cd ~/IOTstack
$ sed -e "s/^/  /" ./.templates/nextcloud/service.yml >>docker-compose.yml

The sed sticks two leading spaces on the start of each line, which is needed to convert a "template" into something useful.

It would also be a good idea to check that the start of your compose file looks like the contents of:

~/IOTstack/.templates/docker-compose-base.yml

Among other things, that file defines the private network shared between NextCloud and its database.

Once all that is in place, "up" the stack.