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tobert / cassandra-docker

Cassandra in Docker
https://registry.hub.docker.com/u/tobert/cassandra/
Apache License 2.0
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Port no. required for seeds? #15

Closed tbsalling closed 9 years ago

tbsalling commented 9 years ago

I am trying to build a small cluster of Cassandra nodes running in Docker containers. I have two hosts each running two Docker containers. I need to pass the seeds around - but unless I used bridged networking in Docker - wouldn't I need to include port numbers for the list of seeds? I can't see any way this is possible.

Thanks, /Thomas.

tobert commented 9 years ago

All of the ports have to be the same on all nodes for Cassandra. If you're running containers across multiple hosts, you will need to use --net=host to use the host networking to expose the ports directly, or use one of the fancy new SDN add-ons to Docker to provide a network where the ports can be matched and IPs can be guaranteed unique.

tbsalling commented 9 years ago

OK - thanks for the input!

I've just made the Docker containers connect to the physical LAN and use standard port no'.s based on the solution proposed in Lars Kellogg-Stedman's blog post "Four ways to connect a docker container to a local network" - sect. "With Linux Bridge devices".