To configure the instance, add environment variables of the form
RETHINKDB_VAR_NAME. The image will convert and pass them as command line arguments of the form
--var-name to the
For example, setting
RETHINKDB_JOIN=184.108.40.206 will translate to
rethinkdb --canonical-address 220.127.116.11 --join 18.104.22.168.
join arguments, the image will attempt to resolve hostnames to IP at runtime, since that is how remote instances self-identify. Additionally, if the
join argument is a DNS load balancer, the image will ping that hostname to see if it can receive a join IP that is different than its own