Create an internal network load balancer

You can create an internal load balancer using the create API method.

With Terraform, you can quickly create a cloud infrastructure in Yandex Cloud and manage it by configuration files. They store the infrastructure description in HashiCorp Configuration Language (HCL). Terraform and its providers are distributed under the Mozilla Public License.

For more information about the provider resources, see the documentation on the Terraform site or mirror site.

If you change the configuration files, Terraform automatically determines which part of your configuration is already deployed and what should be added or removed.

If you don't have Terraform, install it and configure the Yandex Cloud provider.

To create an internal network load balancer with a listener:

1. In the configuration file, describe the parameters of resources that you want to create:

   • name: The name of the network load balancer.
   • type: The type of the network load balancer. Use internal to create an internal network load balancer.
   • listener: The listener parameters.
     • name: The name of the listener.
     • port: The port to receive traffic.
     • internal_address_spec: The specification of the internal load balancer's listener.
       • address: Internal IP address from the range of the selected subnet.
       • subnet_id: The subnet..

   Example configuration file structure:

   provider "yandex" {
       token     = "<OAuth or static key of service account>"
       folder_id = "<folder ID>"
       zone      = "ru-central1-a"
     }
   
   resource "yandex_lb_network_load_balancer" "internal-lb-test" {
     name = "internal-lb-test"
     type = "internal"
   
     listener {
       name = "my-listener"
       port = 8080
       internal_address_spec {
         address   = "<internal IP address>"
         subnet_id = "<subnet ID>"
       }
     }
   

   For more information about the resources you can create using Terraform, see the provider documentation.

2. Make sure that the configuration files are correct.

   1. In the command line, go to the directory where you created the configuration file.
   2. Run the check using the command:

      terraform plan
      

   If the configuration is described correctly, the terminal displays a list of created resources and their parameters. If there are errors in the configuration, Terraform points them out.

3. Deploy the cloud resources.

   1. If the configuration doesn't contain any errors, run the command:

      terraform apply
      

   2. Confirm that you want to create the resources.

   Afterwards, all the necessary resources are created in the specified folder. You can check that the resources are there with the correct settings using the management console.

1. In the configuration file, describe the resource parameters without the listener section:

   Example of creating an internal network load balancer without a listener using Terraform

   resource "yandex_lb_network_load_balancer" "internal-lb-test" {
     name = "internal-lb-test"
     type = "internal"
   

   For more information about resources that you can create using Terraform, see the provider documentation.

2. Make sure that the configuration files are correct.

   1. In the command line, go to the directory where you created the configuration file.

   2. Run the check using the command:

      terraform plan
      

   If the configuration is described correctly, the terminal displays a list of created resources and their parameters. If there are errors in the configuration, Terraform points them out.

3. Deploy the cloud resources.

   1. If the configuration doesn't contain any errors, run the command:

      terraform apply
      

   2. Confirm the resource creation: type yes in the terminal and press Enter.

      Afterwards, all the necessary resources are created in the specified folder. You can verify that the resources are there and properly configured in the management console or using the following CLI command:

      yc load-balancer network-load-balancer get <name of internal network load balancer>
      

1. To create an internal network load balancer with a listener, open the Terraform configuration file and add the listener section to the internal network load balancer's description. To attach a target group, add the attached_target_group section and specify the target group in the target_group_id field.

   Example of creating an internal network load balancer with a listener and attached target group using Terraform

   resource "yandex_lb_network_load_balancer" "internal-lb-test" {
     name = "internal-lb-test"
     type = "internal"
     listener {
       name = "my-listener"
   	     port = 9000
       internal_address_spec {
         subnet_id  = "b0cp4drld130kuprafls"
         ip_version = "ipv4"
       }
     }
     attached_target_group {
       target_group_id = "${yandex_lb_target_group.my-target-group.id}"
       healthcheck {
         name = "http"
           http_options {
             port = 9000
             path = "/ping"
           }
       }
     }
   }
   

   For more information about resources that you can create using Terraform, see the provider documentation.

2. Make sure that the configuration files are correct.

   1. In the command line, go to the directory where you created the configuration file.

   2. Run the check using the command:

      terraform plan
      

   If the configuration is described correctly, the terminal displays a list of created resources and their parameters. If there are errors in the configuration, Terraform points them out.

3. Deploy the cloud resources.

   1. If the configuration doesn't contain any errors, run the command:

      terraform apply
      

   2. Confirm the resource creation: type yes in the terminal and press Enter.

      Afterwards, all the necessary resources are created in the specified folder. You can verify that the resources are there and properly configured in the management console or using the following CLI command:

      yc load-balancer network-load-balancer get <name of internal network load balancer>