Connect a public IP address to a load balancer

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

Connect a public IP address to a load balancer

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

Control panel

1. Make sure that the load balancer is on a subnet that meets the requirements; for more details, see the Preparing a private subnet for connecting a public IP address section of the Public IP addresses guide. You can view load balancer subnets in the Control panel: in the top menu, click Products → Cloud Servers → Load Balancers → Load Balancers tab → load balancer page → Settings block → Network field.
2. In the Control panel, on the top menu, click Products and select Cloud Servers.
3. Go to the Load Balancers section → Load Balancers tab.
4. In the load balancer card, click Attach public IP.
5. Select a public IP address.
6. Click Attach.

OpenStack CLI

1. Open the OpenStack CLI.

2. Copy the load balancer port ID by displaying the load balancer information:

   openstack loadbalancer show <loadbalancer>

   Specify <loadbalancer> — the load balancer ID or name. You can view the list using the openstack loadbalancer list.

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

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

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

   Specify:

   • <port> — the load balancer port ID you copied in step 2;
   • <public_ip_address> — the ID or public IP address, which you can view using the openstack floating ip list.

Disconnect a public IP address from a load balancer

Control panel

1. In the Control panel, on the top menu, click Products and select Cloud Servers.
2. Go to the Load Balancers section → Load Balancers tab.
3. In the load balancer card, next to the public IP address, click .
4. Select Disconnect public IP address.
5. Click Save.

OpenStack CLI

1. Open OpenStack CLI.

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

   openstack floating ip unset --port <public_ip_address>

   Specify <public_ip_address> — the ID or public IP address; you can view it using the openstack floating ip list.