Update Rethink DB command

[johndmulhausen]

Fixes #1426

[johndmulhausen]

cc @mbentley

[joaofnfernandes]

I don't think we should publicly document containers that are in an individual contributor's namespace. Can we check if there's a ucp/rethinkdb, or some sort of official image that we know is maintained and shipped with each version?

[JimGalasyn]

That's quite a beefy command line!

[johndmulhausen]

@joaofnfernandes We're already doing that now with this example via Sven's image, unfortunately.

Can you or @mbentley test this using the official rethinkdb image? https://docs.docker.com/samples/library/rethinkdb/

[mbentley]

Checking. Lines 51 & 52 aren't required and are for an older load balancing solution.

This command using the official image appears to work fine:

REPLICA_ID=""
docker run \
  --rm \
  --net dtr-ol \
  --name db-proxy \
  -v dtr-ca-$REPLICA_ID:/ca \
  -p 9999:8080 \
  rethinkdb:2.3 \
    rethinkdb \
      proxy \
      --bind all \
      --canonical-address db-proxy \
      --driver-tls-key /ca/rethink/key.pem \
      --driver-tls-cert /ca/rethink/cert.pem \
      --driver-tls-ca /ca/rethink/cert.pem \
      --cluster-tls-key /ca/rethink/key.pem \
      --cluster-tls-cert /ca/rethink/cert.pem \
      --cluster-tls-ca /ca/rethink/cert.pem \
      --join dtr-rethinkdb-$REPLICA_ID.dtr-ol