Prepare VM remote call

[olivierlambert]

We should be able to call the xscontainer-prepare-vm from the xscontainer plugin. This way, we could request it directly from outside the dom0.

[robertbreker]

Olivier,

thanks for raising this - makes sense!

However, I personally see the script "xscontainer-prepare-vm" as a temporary workaround, while xscontainer uses networking and SSH for communication.
I'd hope that the next step for xsconainter will be to not require networking/SSH at all and instead rely on an host-internal communication mechanism, such as libvchan.
If we make this transition, we shouldn't require the prepare script anymore. I'd therefore prefer to invest into the transition.

If you need a quick temporary work-around for your use-case, you should be able to execute the steps used by xscontainer-prepare-vm on the XAPI-client. Just keep in mind that it will be temporary!

Best wishes,
Robert

[olivierlambert]

I totally agree, it's better to invest in the "proper" way to do it.

I didn't know libvchan, do you have more documentation about it, and how I can eventually contribute?

[robertbreker]

Libvchan is a communication mechanism of upstream Xen. Unfortunately the documentation is relatively sparse.

The rough plan is to have xscontainer provide a "libvchan" server. An for the revamped Linux Guest Agent to provide the "libvchan" client.

I appreciate your offer to contribute, but I need to come back to it, once I've got my head around how to do this some more.

Best wishes,
Robert

[olivierlambert]

Okay! We'll probably have the opportunity to discuss it IRL when we'll come in Cambridge (don't know when yet).