Connect a public floating IP address to a load balancer

To provide a load balancer in a private subnet with access to and from the internet, you can connect a public floating IP address to it. You can also recreate the load balancer in a public subnet.

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

Connect a public floating IP address to a load balancer

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

Control panel

1. Make sure the load balancer is in a subnet that meets the requirements; for details, see the Prepare a private subnet to connect a public floating IP address instruction Public floating IP addresses. 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.
2. In the Control panel, from the top menu, click Products and select Cloud Servers.
3. Go to the Load Balancers section → Load Balancers.
4. On the load balancer card, click Connect public IP.
5. Select a public floating IP address.
6. Click Connect.

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 floating IP address to the load balancer port:

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

   Specify:

   • <port> — the load balancer port ID you copied in step 2;
   • <floating_ip_address> — ID or public floating IP address; can be viewed using the command openstack floating ip list.

Disconnect a public floating IP address from a load balancer

Control panel

1. In the Control panel, from the top menu, click Products and select Cloud Servers.
2. Go to the Load Balancers section → Load Balancers.
3. On 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 floating IP address from the load balancer port:

   openstack floating ip unset --port <floating_ip_address>

   Specify <floating_ip_address> — the ID or public floating IP address, which you can view with the openstack floating ip list command.