Cloudron Custom App (Couchbase) install fails: ECONNREFUSED

Question

I want to setup a custom app, Couchbase Server (a nosql database), on my cloudron server (followed this doc: https://docs.cloudron.io/packaging/tutorial/). I used this Dockerfile:

FROM couchbase:community-7.2.0
COPY CloudronManifest.json /CloudronManifest.json
RUN ln -s /app/data /opt/couchbase/var //persistent data
EXPOSE 8091-8096 11210-11211
CMD ["couchbase-server"]  //start server

On my local machine building this docker image and running it is fine. I can reach the web UI on localhost:8091.

Installing the built image on my cloudron works until it is stuck in the "Starting" process. The relevant errors are:

• Feb 10 13:43:11box:shell reload spawn: /usr/bin/sudo -S /home/yellowtent/box/src/scripts/restartservice.sh nginx
• Feb 10 13:43:11box:shell reload (stderr): sudo: unable to resolve host 1001629-690: Name or service not known
• Feb 10 13:23:00=> Healtheck error: Error: connect ECONNREFUSED 172.18.16.138:8091

Does anybody has an idea how to debug and solve this problem? Many thanks!

Detailed Description of my approach:

//CloudronManifest.json

{
  "id": "de.lfg.couchbaseserver",
  "title": "couchbase server",
  "author": "Dibbo-Mrinmoy Saha [email protected]",
  "description": "database for the buecherteam",
  "version": "1.0.0",
  "healthCheckPath": "/",
  "httpPort": 8091,
  "addons": {
    "localstorage": {} //enables write access to /app/data
  },
  "manifestVersion": 2
}

1. I have used two versions of the dockerfile above - the difference lies in CMD ["couchbase-server"] and CMD ["/opt/couchbase/bin/couchbase-server"]
2. I execute these commands to install the app on cloudron:
3. sudo docker build -t couchbase-server .
4. sudo docker tag couchbase-server dibbo/couchbase-server
5. sudo docker push dibbo/couchbase-server
6. cloudron install --image dibbo/couchbase-server
7. For CMD ["couchbase-server"] the Couchbase server has to be started by myself, but very strangely in this version you have in the logs the following before I have started couchbase myself:

Starting Couchbase Server -- Web UI available at http://:8091

Does this mean that couchbase has been started but then shut down?

8. Whereas for CMD ["/opt/couchbase/bin/couchbase-server"] you don't have the log above, although couchbase server is running when checking with /opt/couchbase/bin/couchbase-server --status
9. On both versions the ECONNREFUSED error appears and netstat -tulpn returns:

Proto	Recv-Q	Send-Q	Local Address	Foreign Address	State	PID/Program name
tcp	0	0	127.0.0.1:21200	0.0.0.0:*	LISTEN	1/beam.smp
tcp	0	0	0.0.0.0:4369	0.0.0.0:*	LISTEN	20/epmd
tcp	0	0	127.0.0.11:46071	0.0.0.0:*	LISTEN	-
tcp6	0	0	:::4369	:::*	LISTEN	20/epmd
udp	0	0	127.0.0.11:44475	0.0.0.0:*

Only the epmd service of couchbase is running for some reason.

Thank you for your patience! Hope the extra information makes the problem clearer.