Changing the VM internal IP address

Written by

Yandex Cloud

Updated at October 17, 2024

After you create a VM, you can change the internal IP addresses of its network interfaces.

CLI

Terraform

API

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.

View the description of the CLI command for updating the internal IP address of a VM's network interface:
```
yc compute instance update-network-interface --help
```

Get a list of VMs in the default folder:

yc compute instance list

Result:

+----------------------+-----------------+---------------+---------+----------------------+
|          ID          |       NAME      |    ZONE ID    | STATUS  |     DESCRIPTION      |
+----------------------+-----------------+---------------+---------+----------------------+
| fhm0b28lgfp4******** | first-instance  | ru-central1-a | RUNNING | my first vm via CLI  |
| fhm9gk85nj7g******** | second-instance | ru-central1-a | RUNNING | my second vm via CLI |
+----------------------+-----------------+---------------+---------+----------------------+

Select the ID of the VM in question.
Stop the selected VM.

Get a list of network interfaces for the selected VM by specifying its ID:

yc compute instance get <VM_ID>

Result:

...
network_interfaces:
  - index: "0"
    mac_address: d0:0d:24:**:**:**
    subnet_id: e2lpp96bvvgp********
    primary_v4_address:
      address: 192.168.2.23
      one_to_one_nat:
        address: 158.160.**.***
        ip_version: IPV4
  - index: "1"
    mac_address: d0:1d:24:**:**:**
    subnet_id: e2lrucutusnd********
    primary_v4_address:
      address: 192.168.1.32
  - index: "2"
    mac_address: d0:2d:24:**:**:**
    subnet_id: e2lv9c6aek1d********
    primary_v4_address:
      address: 192.168.4.26
...

Save the index field value, i.e., the number of the network interface for which you want to update the internal IP address.

Update the internal IP address of the selected VM's network interface:
```
yc compute instance update-network-interface \
  --id <VM_ID> \
  --ipv4-address <internal_IP_address> \
  --network-interface-index <network_interface_number>
```
Where:
- --id: VM ID.
- --ipv4-address: Internal IP address. Specify a new IP address or enter auto to assign it automatically.
- --network-interface-index: VM's network interface number you previously saved.

Terraform allows you to quickly create a cloud infrastructure in Yandex Cloud and manage it using configuration files. Configuration files store the infrastructure description in the HashiCorp Configuration Language (HCL). Terraform and its providers are distributed under the Business Source License.

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

If you change the configuration files, Terraform automatically detects 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 update the internal IP address of a VM's network interface, add the ip_address parameter to the network_interface section of the network interface in question in the yandex_compute_instance resource configuration:
```
resource "yandex_compute_instance" "vm-1" {
  ...
  network_interface {
    ...
    ip_address = "<internal_IP_address>"
  }
}
```
For more information about the yandex_compute_instance resource parameters, see the provider documentation.
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 change the internal IP address of a VM's network interface, use the updateNetworkInterface REST API method for the Instance resource or the InstanceService/PrimaryAddress gRPC API call.

Changing the VM internal IP address

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