Error Trying to Run Librenms in Docker Container on QNAP

[JustAddSoftware]

Hey everyone,

I am trying to get librenms set up and running in Container Station on a QNAP NAS. I am running into an error when the container is starting up. I am getting this error when configuring the crontabs and it seems to be killing the entire process:

[cont-init.d] 07-svc-cron.sh: executing...
Creating LibreNMS daily.sh cron task with the following period fields: 15 0 * * *
Creating LibreNMS cron artisan schedule:run
Fixing crontabs permissions...
chmod: changing permissions of '/var/spool/cron/crontabs/librenms': Bad address
[cont-init.d] 07-svc-cron.sh: exited 1.
[cont-finish.d] executing container finish scripts...
[cont-finish.d] done.
[s6-finish] waiting for services.

Shortly after this, all processes are stopped and then things start up again and repeat over and over.

Below is my YAML code from my Compose file. Because default file locations in QNAP are stuck in a spot where you can't access them, I am putting my volumes in a folder I have created called /share/Containers/LibreNMS - so all the volumes are mapped there.

What might be wrong?

name: librenms

services:
  db:
    image: mariadb:10
    container_name: librenms_db
    command:
      - "mysqld"
      - "--innodb-file-per-table=1"
      - "--lower-case-table-names=0"
      - "--character-set-server=utf8mb4"
      - "--collation-server=utf8mb4_unicode_ci"
    volumes:
      - "/share/Container/LibreNMS/db:/var/lib/mysql"
    environment:
      - "TZ=America/Chicago"
      - "MARIADB_RANDOM_ROOT_PASSWORD=yes"
      - "MYSQL_DATABASE=librenms"
      - "MYSQL_USER=librenms"
      - "MYSQL_PASSWORD=xxxxxxxx"
    restart: always

  redis:
    image: redis:7.2-alpine
    container_name: librenms_redis
    environment:
      - "TZ=America/Chicago"
    restart: always

  msmtpd:
    image: crazymax/msmtpd:latest
    container_name: librenms_msmtpd
    env_file:
      - "/share/Container/LibreNMS/msmtpd.env"
    restart: always

  librenms:
    image: librenms/librenms:latest
    container_name: librenms
    hostname: librenms
    cap_add:
      - NET_ADMIN
      - NET_RAW
    ports:
      - target: 8000
        published: 8000
        protocol: tcp
    depends_on:
      - db
      - redis
      - msmtpd
    volumes:
      - "/share/Container/LibreNMS/librenms:/data"
    env_file:
      - "/share/Container/LibreNMS/librenms.env"
    environment:
      - "TZ=America/Chicago"
      - "PUID=1000"
      - "PGID=1000"
      - "DB_HOST=db"
      - "DB_NAME=librenms"
      - "DB_USER=librenms"
      - "DB_PASSWORD=xxxxxxx"
      - "DB_TIMEOUT=60"
    restart: always

  dispatcher:
    image: librenms/librenms:latest
    container_name: librenms_dispatcher
    hostname: librenms-dispatcher
    cap_add:
      - NET_ADMIN
      - NET_RAW
    depends_on:
      - librenms
      - redis
    volumes:
      - "/share/Container/LibreNMS/librenms:/data"
    env_file:
      - "/share/Container/LibreNMS/librenms.env"
    environment:
      - "TZ=America/Chicago"
      - "PUID=1000"
      - "PGID=1000"
      - "DB_HOST=db"
      - "DB_NAME=librenms"
      - "DB_USER=librenms"
      - "DB_PASSWORD=xxxxxxxx"
      - "DB_TIMEOUT=60"
      - "DISPATCHER_NODE_ID=dispatcher1"
      - "SIDECAR_DISPATCHER=1"
    restart: always

  syslogng:
    image: librenms/librenms:latest
    container_name: librenms_syslogng
    hostname: librenms-syslogng
    cap_add:
      - NET_ADMIN
      - NET_RAW
    depends_on:
      - librenms
      - redis
    ports:
      - target: 514
        published: 514
        protocol: tcp
      - target: 514
        published: 514
        protocol: udp
    volumes:
      - "/share/Container/LibreNMS/librenms:/data"
    env_file:
      - "/share/Container/LibreNMS/librenms.env"
    environment:
      - "TZ=America/Chicago"
      - "PUID=1000"
      - "PGID=1000"
      - "DB_HOST=db"
      - "DB_NAME=librenms"
      - "DB_USER=librenms"
      - "DB_PASSWORD=xxxxxxxx"
      - "DB_TIMEOUT=60"
      - "SIDECAR_SYSLOGNG=1"
    restart: always

  snmptrapd:
    image: librenms/librenms:latest
    container_name: librenms_snmptrapd
    hostname: librenms-snmptrapd
    cap_add:
      - NET_ADMIN
      - NET_RAW
    depends_on:
      - librenms
      - redis
    ports:
      - target: 162
        published: 162
        protocol: tcp
      - target: 162
        published: 162
        protocol: udp
    volumes:
      - "/share/Container/LibreNMS/librenms:/data"
    env_file:
      - "/share/Container/LibreNMS/librenms.env"
    environment:
      - "TZ=America/Chicago"
      - "PUID=1000"
      - "PGID=1000"
      - "DB_HOST=db"
      - "DB_NAME=librenms"
      - "DB_USER=librenms"
      - "DB_PASSWORD=xxxxxxxx"
      - "DB_TIMEOUT=60"
      - "SIDECAR_SNMPTRAPD=1"
    restart: always

[JustAddSoftware]

Does anyone answer these messages or respond?

[murrant]

@JustAddSoftware sure, don't put a symlink in your container volume that points to /var/spool/cron/crontabs/librenms.

[JustAddSoftware]

Where is the symlink? It’s not in my compose file.  Sent from my iPhoneOn Nov 29, 2025, at 10:42 AM, Tony Murray ***@***.***> wrote: @JustAddSoftware sure, don't put a symlink in your container volume that points to /var/spool/cron/crontabs/librenms. —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you were mentioned.Message ID: ***@***.***>

[murrant]

no, it's in your file system. the startup script chown everything in the librenms directory. If there is a symlink, it follows it.

search /data inside the container or /share/Container/LibreNMS/librenms outside the container.

find /data -type l -lname "/var/spool/cron/crontabs/librenms"

[JustAddSoftware]

Well, problem is there is NOTHING that is getting written to /data (which is mapped to /share/Container/LibreNMS/librenms) other than the top level folder structure but nothing else.

Why does the set up have something that is "invalid" but so difficult to get to. I can get to /var/spool/cron/crontabs before it crashes. So that does exist. But there's no symlink in /data - there is nothing.

[JustAddSoftware]

Don't mean to be a pain, but do you have any further insight for me? Please help me understand what I am doing wrong and why I can't get this working.

[murrant]

It looks like the startup scripts try to chown that file, which fails on your system for some reason. (maybe non-root?)
You could try to remove the chown from the start up script.

[JustAddSoftware]

How can I edit the startup script?It’s in the Container. Why would the container package even have it?  Where would it be to edit?Sent from my iPhoneOn Dec 1, 2025, at 8:28 PM, Tony Murray ***@***.***> wrote: It looks like the startup scripts try to chown that file, which fails on your system for some reason. (maybe non-root?) You could try to remove the chown from the start up script. —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you were mentioned.Message ID: ***@***.***>

[JustAddSoftware]

I'm going to ask this again - how can I edit the startup script? This is all in a Docker container which doesn't stay running long enough to do anything inside the console of that container. I can't get access to the files to edit the script. Is running librenms in a Docker Container really supported?