Creating an Application Load Balancer target group

Written by

Yandex Cloud

Updated at March 6, 2025

Create VMs in the working folder by following this guide.

To create a target group:

Management console

CLI

Terraform

API

In the management console, select the folder to create your target group in.
In the list of services, select Application Load Balancer.
In the left-hand panel, select Target groups.
Click Create target group.
Enter a name and description for the target group.
Under Targets, select a VM from the list or add the target manually:
1. In the IP address field, specify the target's IP and select the subnet.
2. Optionally, if the target's IP address does not belong to Yandex Virtual Private Cloud, select Outside VPC.
  
  For example, specify a private IPv4 address belonging to your data center connected to Yandex Cloud through Yandex Cloud Interconnect. The IP address must be within the RFC 1918 private ranges. For more information, see Subnets.
3. Click Add target resource.
Click Create.

If you do not have the Yandex Cloud CLI yet, install and initialize it.

The folder specified in the CLI profile is used by default. You can specify a different folder through the --folder-name or --folder-id parameter.

See the description of the CLI command to create a target group:
```
yc alb target-group create --help
```

Run the following command, specifying the target group name, subnet name, and internal IP addresses of the VM as parameters:

yc alb target-group create \
  --name <target_group_name> \
  --target subnet-name=<subnet_name>,ip-address=<VM_1_internal_IP_address> \
  --target subnet-name=<subnet_name>,ip-address=<VM_2_internal_IP_address> \
  --target subnet-name=<subnet_name>,ip-address=<VM_3_internal_IP_address>

Result:

id: a5d751meibht********
name: <target_group_name>
folder_id: aoerb349v3h4********
targets:
- ip_address: <VM_1_internal_IP_address>
  subnet_id: fo2tgfikh3he********
- ip_address: <VM_2_internal_IP_address>
  subnet_id: fo2tgfikh3he********
- ip_address: <VM_3_internal_IP_address>
  subnet_id: fo2tgfikh3he********
created_at: "2021-02-11T11:16:27.770674538Z

You can also create a target group with target resources residing outside Yandex Virtual Private Cloud, e.g., in your data center connected to Yandex Cloud via Yandex Cloud Interconnect. The IP addresses of targets must be within the RFC 1918 private ranges. For more information, see Subnets.

Run the following command, specifying the target group name and private IPv4 addresses as parameters:

yc alb target-group create \
  --name <target_group_name> \
  --target private-ip-address=true,ip-address=<resource_1_IPv4_private_address> \
  --target private-ip-address=true,ip-address=<resource_2_IPv4_private_address> \
  --target private-ip-address=true,ip-address=<resource_3_IPv4_private_address>

Result:

id: ds7s2dld2usr********
name: <target_group_name>
folder_id: aoerb349v3h4********
targets:
  - ip_address: <resource_1_IPv4_private_address>
    private_ipv4_address: true
  - ip_address: <resource_2_IPv4_private_address>
    private_ipv4_address: true
  - ip_address: <resource_3_IPv4_private_address>
    private_ipv4_address: true
created_at: "2023-07-25T08:55:14.172526884Z"

With Terraform, you can quickly create a cloud infrastructure in Yandex Cloud and manage it using configuration files. These files store the infrastructure description written in HashiCorp Configuration Language (HCL). If you change the configuration files, Terraform automatically detects which part of your configuration is already deployed, and what should be added or removed.

Terraform is distributed under the Business Source License. The Yandex Cloud provider for Terraform is distributed under the MPL-2.0 license.

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

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

In the Terraform configuration file, define the parameters of the resource you want to create:
```
resource "yandex_alb_target_group" "foo" {
  name           = "<target_group_name>"

  target {
    subnet_id    = "<subnet_ID>"
    ip_address   = "<VM_1_internal_IP_address>"
  }

  target {
    subnet_id    = "<subnet_ID>"
    ip_address   = "<VM_2_internal_IP_address>"
  }

  target {
    subnet_id    = "<subnet_ID>"
    ip_address   = "<VM_3_internal_IP_address>"
  }
}
```
Where yandex_alb_target_group specifies the target group parameters:
- name: Target group name.
- target: Target resource parameters:
  - subnet_id: ID of the subnet hosting the VM. You can get the list of available subnets using the yc vpc subnet list CLI command.
  - ip_address: Instance internal IP address. You can get the list of internal IP addresses using the following CLI command: yc vpc subnet list-used-addresses --id <subnet_ID>.
You can also create a target group with target resources residing outside Yandex Virtual Private Cloud, e.g., in your data center connected to Yandex Cloud via Yandex Cloud Interconnect:
```
resource "yandex_alb_target_group" "foo" {
  name                   = "<target_group_name>"

  target {
    private_ipv4_address = true
    ip_address           = "<resource_1_IPv4_private_address>"
  }

  target {
    private_ipv4_address = true
    ip_address           = "<resource_2_IPv4_private_address>"
  }

  target {
    private_ipv4_address = true
    ip_address           = "<resource_3_IPv4_private_address>"
  }
}
```
Where yandex_alb_target_group specifies the target group parameters:
- name: Target group name.
- target: Target resource parameters:
  - private_ipv4_address: Indicates that the IP address is outside Virtual Private Cloud.
  - ip_address: Private IPv4 address of the resource. The IP addresses must be within the RFC 1918 private ranges. For more information, see Subnets.
For more information about the yandex_alb_target_group resource properties, see the Terraform provider documentation.
Create the resources:
1. In the terminal, change to the folder where you edited the configuration file.
2. Make sure the configuration file is correct using the command:
```
terraform validate
```
  If the configuration is correct, the following message is returned:
```
Success! The configuration is valid.
```
3. Run the command:
```
terraform plan
```
  The terminal will display a list of resources with parameters. No changes are made at this step. If the configuration contains errors, Terraform will point them out.
4. Apply the configuration changes:
```
terraform apply
```
5. Confirm the changes: type yes in the terminal and press Enter.
Terraform will create all the required resources. You can check the new resources using the management console or this CLI command:
```
yc alb target-group list
```

Use the create REST API method for the TargetGroup resource or the TargetGroupService/Create gRPC API call.

Creating an Application Load Balancer target group

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Creating an Application Load Balancer target group

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