Using Multiple Lighthouses

Lighthouse offers a form of high availability with the Multiple Instance feature. The Multiple Instance feature allows you to set up dependent instances of Lighthouse. The dependent Lighthouses automatically receive updates from the primary Lighthouse instance, and maintains connections to all of its remote nodes.

The dependent Lighthouse will also replicate various values from the primary Lighthouse to ensure in the event of a failover, all information is up to date.

Dependent instances are read-only. They may be used to view Lighthouse information specific to that instance, and to connect to its nodes via pmshell. Configuration changes must be performed on the primary Lighthouse instance, which will then update the information displayed on the dependent instance.

The multiple instance feature has the following limitations:

• If external network addresses on the primary or secondary Lighthouses are updated after a dependent Lighthouse has been enrolled, it may break replication.

• Only Opengear nodes with a version that supports multiple instance will connect to the dependent instance. Nodes that don't support multiple instances will behave normally on the primary lighthouse.

• Up to ten dependent instances can be enrolled

• Dependent Lighthouse instances are read-only.Ensure that you re-configure instance specific settings such as hostname, external endpoints, and time zone on a dependent instance before adding the dependent instance to the primary Lighthouse in a normal way through UI.

• Only dependent Lighthouse instances with zero nodes can be enrolled to the primary Lighthouse.

• Removing a dependent Lighthouse instance will initiate a factory reset of the removed Lighthouse.

Note: Dependent Lighthouse user interfaces are read-only.