geoserver with postgis

[scdev92]

I want to get the Geonode/Geoserver running with Kartoza/Postgis with:

docker run -d --name="postgis" kartoza/postgis
docker run --name "geoserver_with_postgis" --link postgis:postgis -v /var/run/docker.sock:/var/run/docker.sock -v `pwd`/data/:/geoserver_data/data -d -p 8080:8080 geonode/geoserver

Adding a new PostGIS store with

Data Source Name: local
Host: localhost
Port: 5432
database: gis
schema: public
user: docker
password: docker

results in the following error:

Error creating data store, check the parameters. Error message: Unable to obtain connection: Cannot create PoolableConnectionFactory (Connection to localhost:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.)

For testing purposes, I run

docker run -d --name="postgis" kartoza/postgis -p 5432:5432

and can establish a successful connection with pgadmin and qgis from my real local machine. So the postgres service seems to work. Also geoserver works fine with geotiffs.

what's going on here?