Custom template replication between pools

[olivierlambert]

Context

When you have a high number of different pools, you might have one pool to generate all your custom templates and then replicate them to all your other pools.

Ideas

Right now, I've thought about 2 approaches:

1. Doing a "XO Hub" for custom templates, so templates can be consumed more easily everywhere.
2. Use VM copy feature in XO to achieve it (copy a template or multiple templates to multiple pools/SRs)

Alternatively, we could also go deeper with a real "sync" capability for templates (like with a rule on tags?) to get them automatically sync. But that's for later.

The first approach needs a lot more per-requisites. Option 2 is relatively simple and can be achieved with API/CLI pretty quickly.

Demand origin

It's been asked few times in the past, but it's becoming more & more requested now. See:

• Ticket#7725085
• https://xcp-ng.org/forum/topic/9092/template-visibility-on-multiple-pools