Allow custom Talos images to be used

[6ixfalls]

There is no way to use custom Talos images in Omni. There are many cases where a user would like to modify something within Talos, such as custom extensions (that should also be supported). Currently, patching machine.install.image may work for the initial install, but there is no way to manage updates, etc.

[rothgar]

You are correct there is no way to run custom images from the Sidero hosted Omni SaaS, but you are incorrect that custom images are not supported.

If you would like to use custom builds of Talos or custom system extensions you'll need to run the Omni stack (Omni + Image factory + container registry) yourself. With this stack you are free to use whatever images and system extensions you'd like.

Here's a document on how to run the Image factory. Omni guides are also in the docs.
https://docs.siderolabs.com/omni/infrastructure-and-extensions/self-hosted/deploy-image-factory-on-prem