seeds.list

The seeds.list contains a list of seed servers that Dynomite’s gossiper uses as the starting point to learn the cluster’s topology.

seeds.list is used by the seed REST API server (florida.js) when dyn_seed_provider is set to florida_provider in dynomite.yaml.

seeds.list is one of three possible ways that you may specify the list of seed servers.

The choices for seed providers are:

Simple provider: The simple provider either defines the list of seed servers in dynomite.yaml or excludes the list of seed servers for a single-server cluster.
Florida provider: The Florida provider defines the seed servers in seeds.list and shares the list via a REST API.
DNS provider: The DNS provider defines the seed servers in a TXT record.

It is a best practice to use the same three seed servers on every node within a data center (DC).

The default location of seeds.list is /etc/dynomitedb/seeds.list.

Format

The seeds.list file lists one seed server per line. Each line has the following format:

<hostname-or-ip>:<dyn-port>:<rack>:<dc>:<node-token>

hostname-or-ip: The hostname or IP address of a seed server that is used by Dynomite for internal communication. Set in dynomite.yaml via dyn_listen.
dyn-port: The port used by Dynomite for internal communication. Defaults to 8101 and is set in dynomite.yaml via dyn_listen.
rack: The seed server’s rack. Set in dynomite.yaml via rack.
dc: The seed server’s data center (DC). Set in dynomite.yaml via datacenter.
node-token: The seed server’s node token. Set in dynomite.yaml via tokens.

The following example shows three seed servers. The first seed server has the following values:

192.168.33.41:8101:rc1:dc1:2147483647
192.168.33.42:8101:rc2:dc1:0
192.168.33.43:8101:rc2:dc1:2147483647