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Proxmox VE

Support level: Community

What is Proxmox VE​

From https://pve.proxmox.com/wiki/Main_Page

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Proxmox Virtual Environment is an open source server virtualization management solution based on QEMU/KVM and LXC. You can manage virtual machines, containers, highly available clusters, storage and networks with an integrated, easy-to-use web interface or via CLI. Proxmox VE code is licensed under the GNU Affero General Public License, version 3. The project is developed and maintained by Proxmox Server Solutions GmbH.

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This requires Proxmox VE 7.0 or newer.

Preparation​

The following placeholders will be used:

  • proxmox.company is the FQDN of the Proxmox VE server.
  • authentik.company is the FQDN of the authentik install.

Step 1​

Under Providers, create an OAuth2/OpenID provider with these settings:

  • Name: proxmox
  • Redirect URI: https://proxmox.company:8006 (Note the absence of the trailing slash, and the inclusion of the webinterface port)
  • Signing Key: Select any available key

Step 2​

Create an application which uses this provider. Optionally apply access restrictions to the application.

Set the Launch URL to https://promox.company:8006.

Proxmox VE Setup​

Proxmox VE allows configuration of authentication sources using the web interface (under Datacenter -> Permissions -> Realms).

Another way is to use the CLI. SSH into any Proxmox cluster node, and issue the following command:

pveum realm add authentik --type openid --issuer-url https://authentik.company/application/o/proxmox/ --client-id xxx --client-key xxx --username-claim username --autocreate 1

You can find the Issuer URL on the Provider Metadata tab in authentik. You can find the Client ID and Key on the Provider Edit dialog in authentik.

After configuring the source in Proxmox, any user that logs in to Proxmox for the first time automatically gets an user named <authentik username>@<pve realm name>. In this example, authentik user bob will get an user named bob@authentik in Proxmox. You can then assign Permissions as normally in Proxmox. You can also pre-create the users in Proxmox if you want the user to be able to perform actions immediately after first login.

There is no way to directly trigger an OpenID Connect login in Proxmox, but if you set the source as 'default', it will be automatically selected on the Proxmox login screen.