Clustering

The cluster feature allows 2 vyos routers to share IP addresses and various services.

VyOS supports multicast clustering.

Note

Please follow the process of the cluster function here. https://phabricator.vyos.net/T985

General cluster configuration

In the general cluster configuration the network interfaces used for monitoring and negotiation of the cluster health is defined. Additionally, the communication interval settings, multicast group (for sending/receiving heartbeat messages), and pre-shared secret used in this monitoring is defined.

[email protected]# set cluster
Possible completions:
  dead-interval            Interval after which a node is considered dead after missing heartbeats (milliseconds)
+> group                   Name of resource group for clustering [REQUIRED]
+  interface               Interface(s) for sending/receiving heartbeat packets [REQUIRED]
  keepalive-interval       Time interval between heartbeat packets (milliseconds)
  mcast-group              Multicast group for sending/receiving heartbeat packets
  monitor-dead-interval    Interval after which a monitor node is considered dead (milliseconds)
  pre-shared-secret        Pre-shared secret for authentication between cluster nodes [REQUIRED]

Cluster group configuration

For the cluster group configuration, the group name must be defined before the groups configuration can be set (See Example below). After the group name is defined, the specific service to be clustered between primary and secondary nodes is configured.

[email protected]# set cluster group GROUPNAME
Possible completions:
  auto-failback        Fail back to primary node if it recovers from failure
+  monitor             IP address(es) for monitoring connectivity
  primary              Host name of the primary node [REQUIRED]
+  secondary           Host name(s) of the secondary node(s) [REQUIRED]
+  service             IP address(es) or service name(s) in this resource group [REQUIRED]

Review cluster status

[email protected]:~$ show cluster status

Example

In the example below SSH is clustered between two nodes.

cluster {
    dead-interval 20000
    group cluster {
        auto-failback false
        primary node1
        secondary node2
        service ssh
        service 192.168.0.123/24/eth0
    }
    interface eth0
    keepalive-interval 5000
    monitor-dead-interval 20000
    pre-shared-secret S3cr#t
}