Connect a public IP address to the load balancer

If you use a load balancer to work with a Managed Kubernetes cluster, by default the load balancer is created on the same network as the cluster nodes and is assigned a public IP address. To create a load balancer without a public IP address or with an IP address from other subnets, use the Configure a load balancer instructions in the Managed Kubernetes section. For the load balancer to work correctly in a cluster, all actions with the load balancer must be performed via kubectl.

Connect a public IP address to the load balancer⁠

A static public IP address can be connected when creating a balancer or to an already created balancer.

Control panel

1. Make sure that the load balancer is on a subnet that meets the requirements, see Prepare a private subnet to connect a public IP address in the Public IP Addresses instruction for details. You can view the subnets of the load balancer in the control panel: in the top menu, click Products → Cloud Servers → Balancers → Balancers tab → Balancers page → Balancer page → Settings block → Network field.
2. In the dashboard, on the top menu, click Products and select Cloud Servers.
3. Go to Balancers → Balancers tab.
4. In the balancer card, click Connect Public IP.
5. Select a public IP address.
6. Click Connect.

OpenStack CLI

1. Open the OpenStack CLI.

2. Copy the port ID of the balancer, to do this output the balancer information:

   openstack loadbalancer show <loadbalancer>

   Specify <loadbalancer> — balancer ID or name. The list can be viewed using the openstack loadbalancer list command.

   In the command output, copy the value from the vip_port_id field.

3. Connect the public IP address to the load balancer port:

   openstack floating ip set --port <port> <public_ip_address>

   Specify:

   • <port> — The port ID of the load balancer port that you copied in step 2;
   • <public_ip_address> — ID, or public IP address, can be viewed with the command openstack floating ip list.

Disconnect the public IP address from the load balancer⁠

Control panel

1. In the dashboard, on the top menu, click Products and select Cloud Servers.
2. Go to Balancers → Balancers tab.
3. In the balancer card of the public IP address, click .
4. Select Disable public IP address.
5. Click Save.

OpenStack CLI

1. Open the OpenStack CLI.

2. Disconnect the public IP address from the load balancer port:

   openstack floating ip unset --port <public_ip_address>

   Specify <public_ip_address> — ID or public IP address, can be viewed using the openstack floating ip list command.