How to Attach a Custom ISO to a Vultr Cloud Compute Instance

1 min readUpdated 4 November 2026

Boot an OS missing from Vultr's list, or a rescue environment, from a custom ISO on Cloud Compute.

ISO images allow you to install a specific operating system on a Vultr Cloud Compute instance. Custom ISOs enable you to deploy operating systems not available in the default Vultr installer list. They are useful for creating tailored environments or booting into specialized modes, such as rescue and recovery environments.

Follow this guide to attach a custom ISO to a Vultr Cloud Compute instance using the Vultr Console, API, CLI, or Terraform.

Warning

Installing a custom ISO on a Vultr Cloud Compute instance disables the default user credentials listed on your instance's management page.

Navigate to Compute and click Instances.
Click your target Vultr Cloud Compute instance to open its management page.
Navigate to the Settings tab.
Find and click Custom ISO on the left navigation menu.
Select a custom ISO available in your Vultr account or click the ISO Library drop-down to select from a list of public ISOs.
Click Attach ISO and Reboot to attach the ISO to your instance.

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Attach a Custom ISO to a Vultr Cloud Compute Instance | Vultr Docs