V2 Multi-Datacenter Replication:
With NAT

Riak supports replication of data on networks that use static NAT. This capability can be used for replicating data over the internet where servers have both internal and public IP addresses (see Riak REPL SSL if you replicate data over a public network).

Requirements

In order for Multi-Datacenter Replication to work on a server configured with NAT, the NAT addresses must be configured statically.

Example

Imagine the following scenario:

• Server A is the source of replicated data
• Servers B and C would like to be clients of the replicated data

Server A is set up with static NAT, configured for IP addresses:

• 192.168.1.10 (internal) and 50.16.238.123 (public)

Server A replication will listen on:

• the internal IP address 192.168.1.10, port 9010
• the public IP address 50.16.238.123, port 9011

Server B is set up with a single public IP address: 50.16.238.200

• Server B replication will connect as a client to the public IP address 50.16.238.123, port 9011

Server C is set up with a single internal IP address: 192.168.1.20

• Server C replication will connect as a client to the internal IP address of 192.168.1.10, port 9010

Configure a listener on Server A:

riak-repl add-nat-listener riak@192.168.1.10 192.168.1.10 9010 50.16.238.123 9011

Configure a site (client) on Server B:

riak-repl add-site 50.16.238.123 9011 server_a_to_b

Configure a site (client) on Server C:

riak-repl add-site 192.168.1.10 9010 server_a_to_c