Configuring Stanchion

In your cluster, you must include one – and only one – Stanchion node. All the Riak CS nodes in that cluster must then be configured to communicate with that Stanchion node so that the cluster is able to track and negotiate causally-sensitive operations.

All of the settings used by the Stanchion node are stored in the stanchion.conf file, which is located in the /etc/stanchion folder on most operating systems.

If you’re upgrading from a version of Riak CS prior to 2.0.0 – when the stanchion.conf and riak-cs.conf files was introduced – you can still use the old-style app.config configuration files. Examples for both configuration types will be provided.

configuration.name = value

{stanchion, [
             %% Configs here
            ]}

Specifying the Stanchion IP Address and Port

If you have a single node, you don’t have to change the Stanchion settings because Stanchion simply listens to the requests from the local host. If your Riak CS cluster has multiple nodes, you must set the IP address and port that Stanchion listens on for requests from other nodes.

You can set the IP using the listener parameter. Replace 127.0.0.1 with the IP address of the Stanchion node, and 8080 with the port of the Stanchion node.

listener = 127.0.0.1:8080

{stanchion, [
             {host, {"127.0.0.1", 8085}},
             %% Other configs
            ]}

If you want to use SSL, make sure the ssl.certfile and ssl.keyfile settings are not commented out, and have been set correctly.

ssl.certfile = "./etc/cert.pem"
ssl.keyfile = "./etc/key.pem"

{stanchion, [
             {ssl, [
                    {certfile, "./etc/cert.pem"},
                    {keyfile, "./etc/key.pem"}
                   ]},
             %% Other configs
            ]}

Specifying the Admin User

The admin user is created during the configuration of Riak CS. The same user credentials must be added to each Stanchion used in the cluster. This is set in the stanchion.conf file, which is located in the /etc/stanchion directory. Enter the same admin.key and admin.secret as

admin.key = OUCXMB6I3HOZ6D0GWO2D
admin.secret = a58Mqd3qN-SqCoFIta58Mqd3qN7umE2hnunGag==

{stanchion, [
           %% Admin user credentials
           {admin_key, "OUCXMB6I3HOZ6D0GWO2D"},
           {admin_secret, "a58Mqd3qN-SqCoFIta58Mqd3qN7umE2hnunGag=="},
           %% Other configs
          ]}

Specifying Riak Information

If you are running a single node for experimentation, or if a Riak node is running locally and configured to listen for protocol buffer traffic on 0.0.0.0, the default Riak configuration for Stanchion should be fine.

Otherwise, update the IP address and port for the Riak host in the Stanchion configuration file.

riak_host = 127.0.0.1:8087

{stanchion, [
             {riak_host, {"127.0.0.1", 8087}},
             %% Other configs
            ]}