Associating a public IP with a virtual machine

If you do not have the Yandex Cloud command line interface yet, install and initialize it.

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

To associate a public IP address with a VM, run the following CLI command:

yc compute instance add-one-to-one-nat \
  --id=<VM_ID> \
  --network-interface-index=<VM_network_interface_number> \
  --nat-address=<IP_address>

Where:

• --id: VM ID. You can get a list of available VM IDs in a folder using the yc compute instance list CLI command.

• --network-interface-index: VM network interface number. The default value is 0. To get a list of VM network interfaces and their numbers, run the following command: yc compute instance get <VM_ID>.

• --nat-address: Public IP address to assign to the VM. This is an optional parameter. If you do not specify the --nat-address parameter, a public IP address will be assigned to the VM automatically.

  You can get a list of reserved public IP addresses available in a folder using the yc vpc address list CLI command. The IP address and the VM must be in the same availability zone.

Usage example:

yc compute instance add-one-to-one-nat \
  --id=fhmsbag62taf******** \
  --network-interface-index=0 \
  --nat-address=51.250.*.***

Result:

id: fhmsbag62taf********
folder_id: b1gv87ssvu49********
created_at: "2022-05-06T10:41:56Z"
...
network_settings:
  type: STANDARD
placement_policy: {}

For more information about the yc compute instance add-one-to-one-nat command, see the CLI reference.

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.

1. To create a public IP address and link it with a VM's network interface, use the yandex_vpc_address resource and specify the address you get in the nat_ip_address field under network_interface for the network interface you need in the yandex_compute_instance resource configuration:

   # Creating a static IP address.
   
   resource "yandex_vpc_address" "addr" {
     name = "vm-adress"
     external_ipv4_address {
       zone_id = "<availability_zone>"
     }
   }
   
   # Creating a VM.
   
   resource "yandex_compute_instance" "vm-1" {
     name        = "<VM_name>"
     platform_id = "standard-v3"
     resources {
       core_fraction = 20
       cores         = 2
       memory        = 1
     }
     ...
   
     ## Assigning a subnet and IP address to the VM's network interface in the network_interface section.
   
     network_interface {
       subnet_id      = "<VM_subnet_ID>"
       nat            = true
       nat_ip_address = yandex_vpc_address.addr.external_ipv4_address[0].address
     }
     ...
   
   }
   

   Where nat_ip_address is the public IP address to assign to the VM's network interface. The yandex_vpc_address resource contains a list of items, where [0] is the list's first item that contains the IP address. If you already have a reserved public IP address to assign to your VM, specify it in the nat_ip_address field:

   nat_ip_address = "<IP_address>"
   

   The IP address and the VM must be in the same availability zone.

   For more information about the yandex_compute_instance resource parameters, see the provider documentation.

2. Create 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.

To associate a public IP address with a VM's network interface, use the addOneToOneNat REST API method for the Instance resource or the InstanceService/AddOneToOneNat gRPC API call.