Usage (docker) without --link

I tried setting up Omniboard as described in the docs as follows

docker run --name sacred-db -p 27017:27017 -v /path/to/database/:/data/db -d
docker run -it --rm -p 9000:9000 --name omniboard --link sacred-db:mongo vivekratnavel/omniboard -m mongo:27017:sacre

and everything is working as expected.

However, reading from the docker documentation, I see that --link is deprecated

Warning: The --link flag is a legacy feature of Docker. It may eventually be removed. Unless you absolutely need to continue using it, we recommend that you use user-defined networks to facilitate communication between two containers instead of using --link

What is the preferred way to run through docker without using the --link option?

I tried

docker network create sacred-network
docker run --name sacred-db -p 27017:27017 -v /path/to/database/:/data/db -d --net=sacred-network mongo
docker run -it --rm -p 9000:9000 --name omniboard vivekratnavel/omniboard --net=sacred-network -m mongo:27017:sacred

But it I only get a failed to connect to server error:

> omniboard@0.0.4 prod /usr/omniboard
> cross-env NODE_ENV=production node dist/index.js "--net=sacred-network" "-m" "mongo:27017:sacred"

Omniboard is listening on port 9000!
2018-11-13T11:41:53.551Z 'MongoNetworkError: failed to connect to server [mongo:27017] on first connect [MongoNetworkError: getaddrinfo ENOTFOUND mongo mongo:27017]'
Retrying in 20 seconds...
Retrying first connect...
(node:29) DeprecationWarning: current URL string parser is deprecated, and will be removed in a future version. To use the new parser, pass option { useNewUrlParser: true } to MongoClient.connect.
2018-11-13T11:42:13.556Z 'MongoNetworkError: failed to connect to server [mongo:27017] on first connect [MongoNetworkError: getaddrinfo ENOTFOUND mongo mongo:27017]'
Retrying in 20 seconds...
Retrying first connect...
2018-11-13T11:42:33.554Z 'MongoNetworkError: failed to connect to server [mongo:27017] on first connect [MongoNetworkError: getaddrinfo ENOTFOUND mongo mongo:27017]'
Failed to establish connection to mongodb://mongo:27017/sacred after 2 retries. Exiting now...
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! omniboard@0.0.4 prod: `cross-env NODE_ENV=production node dist/index.js "--net=sacred-network" "-m" "mongo:27017:sacred"`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the omniboard@0.0.4 prod script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2018-11-13T11_42_33_587Z-debug.log

[vivekratnavel]

@loeiten Sorry! I missed your mongo container creation part in the first comment.

Could you please try this?

docker run -it --rm -p 9000:9000 --name omniboard --net=sacred-network vivekratnavel/omniboard -m sacred-db:27017:sacred

Here hostname should be the name of your mongo container. In the docs, it is mongo because of alias used in link. Please let me know if the above command doesn’t work.

[vivekratnavel]

Updated the docs with --net. Thanks!