Create Load Balancer Cluster

In this scheme, load balancers manage incoming requests one by one, rotating them between the servers added to a cluster (a round-robin method). 

OnApp load balancers are based on Layer 4 load balancing which means that requests are distributed at the transport layer, such as TCP or UDP transport protocols. To add an LB cluster:

  1. Go to your Control Panel's Load Balancers menu.
  2. Click the Add New Balancer button.
  3. On the page that follows, fill in the form that appears:

On this page:




Cluster Configuration
  • Port - specify the port for this load balancer to run on (e.g. 9090, 8080, 9008 etc.)

To add multiple load balancer ports, click the "+" button next to the first port.

Load Balancer Instance

  • Label – give a name to your load balancer instance.
  • Hostname – specify a host name that will identify your load balancer.
  • Compute zone – choose a Compute zone.
  • Compute resource – select a Compute resource that will be enabled for the cluster.
  • Network zone – choose a network zone for this load balancer.
  • Port Speed – use the slider to set a port speed or tick the Unlimited box if required.

Load Balancer Type

  • Load Balancer Type - choose the Cluster option and click Next.

Cluster Nodes


This is where you add and configure the nodes in this load balancing cluster. A node is a combination of a VS and an IP address.

  • Virtual Server - select a virtual server from the drop-down box and click the Add Node button.

Click Save to create the load balancer cluster.

The only VSs you can add to a cluster are those which are based on the selected Compute resource/Compute zone, have an IP in the defined network zone and are located in the same IP range.

Enabled anti-spoofing would prevent adding Windows-based virtual servers as nodes to the load balancer cluster. To disable anti-spoofing reboot windows-based nodes from Control Panel after they are added to the cluster.