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.