Detaching a file storage from a VM

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Updated at April 24, 2025

Unmount the file storage from the VM:

Connect to the VM via SSH.
If you previously added a line to the /etc/fstab file to automatically mount the file storage to the VM at startup (e.g., when attaching the storage to the VM), delete that line.
Run this command:
```
sudo umount <mount_path>
```

To check that your file storage is unmounted, run this command:

df -T

The result must show no virtiofs type file system mapped to the file storage:

Filesystem        Type         1K-blocks    Used Available Use% Mounted on
udev              devtmpfs        988600       0    988600   0% /dev
tmpfs             tmpfs           203524     780    202744   1% /run
/dev/vda2         ext4          13354932 1909060  10861420  15% /
tmpfs             tmpfs          1017604       0   1017604   0% /dev/shm
tmpfs             tmpfs             5120       0      5120   0% /run/lock
tmpfs             tmpfs          1017604       0   1017604   0% /sys/fs/cgroup
tmpfs             tmpfs           203520       0    203520   0% /run/user/1000

Stop the VM.
Detach the file storage from the VM in Compute Cloud:
Management console

CLI

Terraform

API
1. In the management console, select the folder where your file storage resides.
2. Select Compute Cloud.
3. In the left-hand panel, select File storages.
4. Select the storage.
5. Go to the Virtual machines tab.
6. In the line with the VM in question, click and select Detach file storage.
7. In the window that opens, confirm the detachment.
If you do not have the Yandex Cloud CLI yet, install and initialize it.

The folder specified when creating the CLI profile is used by default. To change the default folder, use the yc config set folder-id <folder_ID> command. You can also specify a different folder for any command using the --folder-name or --folder-id parameter.
1. See the description of the CLI command for attaching a file storage to a VM:
  yc compute instance detach-filesystem --help
2. Get a list of file storages in the default folder:
  yc compute filesystem list
  Result:
  +----------------------+-------------------+------------+---------------+--------+-------------+ | ID | NAME | SIZE | ZONE | STATUS | DESCRIPTION | +----------------------+-------------------+------------+---------------+--------+-------------+ | epdtcr9blled******** | first-filesystem | 1073741824 | ru-central1-a | READY | | | epd3f4gv8bs4******** | second-filesystem | 1073741824 | ru-central1-a | READY | | +----------------------+-------------------+------------+---------------+--------+-------------+
3. Get a list of VMs in the default folder:
  yc compute instance list
  Result:
  +----------------------+-------+---------------+---------+--------------+-------------+ | ID | NAME | ZONE ID | STATUS | EXTERNAL IP | INTERNAL IP | +----------------------+-------+---------------+---------+--------------+-------------+ | epdj4upltbiv******** | vm-01 | ru-central1-a | RUNNING | 51.250.**.** | 192.168.*.* | | 1pc3088tkv4m******** | vm-02 | ru-central1-a | RUNNING | 84.201.**.** | 192.168.*.* | +----------------------+-------+---------------+---------+--------------+-------------+
4. Detach the file storage from a VM:
  yc compute instance detach-filesystem \ --id <VM_ID> \ --filesystem-id <file_storage_ID>
  Where:
  - --id: VM ID.
    
    Instead of the ID, you can specify the VM name in the --name parameter.
  - --filesystem-id: File storage ID.
    
    Instead of the ID, you can specify the file storage name in the --filesystem-name parameter.
  As a result, the command will output the updated VM configuration. The detached file storage must not be featured in the filesystems section of the configuration you get.
If you do not have Terraform yet, install it and configure its Yandex Cloud provider.

Set the allow_stopping_for_update parameter to true on your VM, if you have not done it yet.
1. Open the Terraform configuration file and delete the section specifying the storage:
  Example of specifying a storage in the VM configuration using Terraform
  
  ... resource "yandex_compute_instance" "vm-1" { name = "test-vm" platform_id = "standard-v3" zone = "ru-central1-a" filesystem { filesystem_id = "fhmaikp755gr********" } ...
2. Apply the changes:
  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.
You can check that the storage has been detached from the VM using the management console or this CLI command:
```
yc compute instance get <VM_name>
```
Use the detachFilesystem REST API method for the Instance resource or the InstanceService/DetachFilesystem gRPC API call.

Detaching a file storage from a VM

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