talos Sponsored: backing up and recovering machine configuration

Sponsored: backing up and recovering machine configuration

Open andrewrynhard opened this issue 3 years ago • 3 comments

Description

Another nice thing to have is the ability to reapply the last known good machine configuration to get back the node to a working state. Save the machine-config.yml when applying a new one, and provide a way to use the backup if the boot went wrong.

Dec 22 '21 16:12 andrewrynhard

Ideas:

API for rolling back to a last known configuration
Storing the machine configuration with each boot option (A, or B)

Try mode may handle some of this. Other parts might have to be manual?

See #4591, #4628

Dec 22 '21 17:12 andrewrynhard

Try mode is not enough for testing all the modification of a machine config. Some need a restart of the node which is prevented by the volatile nature of the try mode. Something simple and robust (manual) would be enough.

Jan 05 '22 18:01 sbskas

Try mode is not enough for testing all the modification of a machine config. Some need a restart of the node which is prevented by the volatile nature of the try mode. Something simple and robust (manual) would be enough.

Bit of a necro, but agreed... "Try" is still too much "hit or miss" to rely on... At least when it comes to node-bricking.

Talos has 1 single actual weakness and thats the fact that a bad apply can cause a node to go down without a way to get it back-up without manual intervention on-site.

It would be nice having a KVM key combo that can be hit to force a revert to previous known-good config.