Multi-node operation¶

A High Availability (HA) cluster in an Active-Passive configuration is a solution that provides high availability of services by using a mechanism where one node (active) handles the traffic and the other node (passive) remains on standby to take over tasks in case of failure of the primary node.

Virtual Router Redundancy Protocol (VRRP) is a virtual IP address that is used as a common gateway address in the network (in our case, the NV address). With this protocol, the availability of servers, routers or gateways in the network can be increased by providing a failover mechanism.

HA cluster configuration¶

1. Reserve IP address for the secondary node. Secondary node does not have to be in the same subnet as the main node.

2. Log in to the secondary node via the CLI console.

3. From the main menu, select option no. 1 (Settings) and configure secondary node with a hostname, domain, address and other neccessary information. After accepting the changes the system will request a reboot of the machine.

4. Open the management portal of the secondary node. Select secondary install and copy it’s encryption key.

5. On the main node, open “System configuration -> System nodes”. Create a new node, open details and select “Download configuration”. Copy node’s encryption key into the field and confirm. Download should start momentarily.

6. Go back to the management panel of the secondary and upload the configuration file there.