The "SUBDOMAIN" variable is not set

[wos]

Hi together,

after getting mail to work i get the “Forget Password” Mail. There is a link in the Mail, when clicking on it, it will send me to https://localhost:5678… which could not work.

I’ve read that there some environment variables must also set. I’ve tried to achieve this …

services:
  n8n:
    image: n8nio/n8n:latest
    ports:
      - "5678:5678"
    restart: always
    environment:
      - DOMAIN_NAME=mydomain.de
      - SUBDOMAIN=n8n
      - DB_TYPE=postgresdb
      - DB_POSTGRESDB_HOST=postgres
      - DB_POSTGRESDB_PORT=5432
      - DB_POSTGRESDB_DATABASE=n8n
      - DB_POSTGRESDB_USER=n8n
      - DB_POSTGRESDB_PASSWORD=0987654321
      - GENERIC_TIMEZONE=Europe/Berlin
      - N8N_SECURE_COOKIE=false
      - N8N_EMAIL_MODE=smtp
      - N8N_SMTP_HOST=smtp.strato.de
      - N8N_SMTP_PORT=465
      - [email protected]
      - N8N_SMTP_PASS=1234567890
      - [email protected]
      - N8N_SMTP_SSL=true
      - N8N_HOST=${SUBDOMAIN}.${DOMAIN_NAME}
      - N8N_PORT=5678
      - N8N_PROTOCOL=https
      - NODE_ENV=production
      - WEBHOOK_URL=https://${SUBDOMAIN}.${DOMAIN_NAME}/
    volumes:
      - n8n_data:/home/node/.n8n
    depends_on:
      - postgres
  postgres:
    image: postgres:14
    restart: always
    environment:
      - POSTGRES_USER=n8n
      - POSTGRES_PASSWORD=0987654321
      - POSTGRES_DB=n8n
    volumes:
      - postgres_data:/var/lib/postgresql/data
  app:
    image: 'jc21/nginx-proxy-manager:latest'
    restart: unless-stopped
    ports:
      - '80:80'
      - '443:443'
      - '81:81'
    volumes:
      - ./data:/data
      - ./letsencrypt:/etc/letsencrypt
volumes:
  n8n_data:
  postgres_data:

But when i try to start up docker, then there’s stated that the variable is not set:

user@linux:~/n8n-produktiv$ sudo docker compose up -d
[sudo] Passwort für user:
WARN[0000] The "SUBDOMAIN" variable is not set. Defaulting to a blank string.
WARN[0000] The "DOMAIN_NAME" variable is not set. Defaulting to a blank string.
WARN[0000] The "SUBDOMAIN" variable is not set. Defaulting to a blank string.
WARN[0000] The "DOMAIN_NAME" variable is not set. Defaulting to a blank string.
[+] Running 3/3
 ✔ Container n8n-produktiv-postgres-1  Running                                                                                                                                                0.0s
 ✔ Container n8n-produktiv-app-1       Running                                                                                                                                                0.0s
 ✔ Container n8n-produktiv-n8n-1       Running                                                                                                                                                0.0s
user@linux:~/n8n-produktiv$ ^C

But I’ve the domian name and subdomain in docker-compose.yml. Where’s my fault? Cant understand why it’s not using it.

[shortstacked]

Hey, looks like you need to set the proper webhook URL for the password reset emails. Try setting these environment variables directly:

environment:
  - N8N_HOST=n8n.mydomain.de
  - WEBHOOK_URL=https://n8n.mydomain.de

This tells n8n what URL to use in emails instead of defaulting to localhost:5678. Just replace n8n.mydomain.de with your actual domain.

[wos]

Ahhh, ok. Then i’ll make it like this. I asked me before (because i fond those new lines …

      - DOMAIN_NAME=mydomain.de
      - SUBDOMAIN=n8n
      - N8N_HOST=${SUBDOMAIN}.${DOMAIN_NAME}
      - N8N_PORT=5678
      - N8N_PROTOCOL=https
      - NODE_ENV=production
      - WEBHOOK_URL=https://${SUBDOMAIN}.${DOMAIN_NAME}/

… from another forum post … is it really neccessary to make it like this, and then build the real url from variables, or … is it not really also possible to just write mydomain directly in the config, without hocus pocus.

I’vd decided to delete those lines from my config and make it just with the 2 lines, you described. And i wold thought, this must work.

I thought, this must be set up in that way, to keep flexibility and so on.

But unfortunately after modify the config, no more SMTP Mails are working …

I can’t figure out, where should now be the problem in the config:

services:
  n8n:
    image: n8nio/n8n:latest
    ports:
      - "5678:5678"
    restart: always
    environment:
      - DB_TYPE=postgresdb
      - DB_POSTGRESDB_HOST=postgres
      - DB_POSTGRESDB_PORT=5432
      - DB_POSTGRESDB_DATABASE=n8n
      - DB_POSTGRESDB_USER=n8n
      - DB_POSTGRESDB_PASSWORD=1234567890
      - GENERIC_TIMEZONE=Europe/Berlin
      - N8N_EMAIL_MODE=smtp
      - N8N_SMTP_HOST=smtp.strato.de
      - N8N_SMTP_PORT=465
      - [email protected]
      - N8N_SMTP_PASS=0987654321
      - [email protected]
      - N8N_SMTP_SSL=true
      - N8N_HOST=n8n.mydomain.de
      - WEBHOOK_URL=n8n.mydomain.de/
    volumes:
      - n8n_data:/home/node/.n8n
    depends_on:
      - postgres
  postgres:
    image: postgres:14
    restart: always
    environment:
      - POSTGRES_USER=n8n
      - POSTGRES_PASSWORD=1234567890
      - POSTGRES_DB=n8n
    volumes:
      - postgres_data:/var/lib/postgresql/data
  app:
    image: 'jc21/nginx-proxy-manager:latest'
    restart: unless-stopped
    ports:
      - '80:80'
      - '443:443'
      - '81:81'
    volumes:
      - ./data:/data
      - ./letsencrypt:/etc/letsencrypt
volumes:
  n8n_data:
  postgres_data:

Is there a way to look, which line or what exactly in the config, is not correct?!