3 node scylladb on MAC using docker

[agrawal.bitsg@gmail.com]

Hi,

I would like to run 3 node instance of scylladb on my MAC. I have an application which needs to connect to 3 instances(nodes) of scylla at 3 different IP address and on the same port 9042.

I use these commands to spawn my 3 docker instances:

# docker run --name scylla1 -d scylladb/scylla

# docker run --name scylla2 -d scylladb/scylla --seeds="$(docker inspect --format='{{ .NetworkSettings.IPAddress }}' scylla1)"

# docker run --name scylla3 -d scylladb/scylla --seeds="$(docker inspect --format='{{ .NetworkSettings.IPAddress }}' scylla1)"

If I expose the port 9042 using -p 9042:9042 it exposes the port on 127.0.0.1, so I cannot expose ports from other 2 scylla instances on the same port and ip. Can I have the other 2 scylla instances expose ports 9042 on 127.0.0.2 and 127.0.0.3 respectively.

Any comments on how I can go about doing this.

-Sid 

[Pekka Enberg]

Hello,

Is there something that prevents your application from connecting
directly to the IP addresses reported by "docker inspect"? I'm not
sure if you can configure port forwarding like that in Docker.

- Pekka

[Sidhartha Agrawal]

When I try to ping 172.17.0.2, (which is the ip I see in docker inspect) from my host, I get no response.

-Sid

[Asias He]

Hello Sidhartha,

Can you try this?

# sudo ifconfig lo0 alias 127.0.0.2 up
# sudo ifconfig lo0 alias 127.0.0.3 up

# docker run --name scylla1 -p 127.0.0.1:9042:9042 -d scylladb/scylla
# docker run --name scylla2 -p 127.0.0.2:9042:9042 -d scylladb/scylla --seeds="$(docker inspect --format='{{ .NetworkSettings.IPAddress }}' scylla1)"
# docker run --name scylla3 -p 127.0.0.3:9042:9042 -d scylladb/scylla --seeds="$(docker inspect --format='{{ .NetworkSettings.IPAddress }}' scylla1)"

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Asias

[Sidhartha Agrawal]

Yes, it works! 

Thanks :)

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