On 2018-11-18 09:11, Mohammed Naser wrote:

https://blueprints.launchpad.net/nova/+spec/openstack-api-hostid

This should take care of it, don't know if it exists in Juno though.

It *does* exist in Juno, it *can't*, however, do what I want -- at least, generically. The hostId that gets returned is a value that's (apparently) used to let you know, semi-anonymously, how affinity is (or isn't) working for your VMs. So you get a unique identifier for each hypervisor -- but it has no *obvious* bearing on the hostname. It's an id that's formed from the SHA224 hash of the ID of your tenant and the hostname of the hypervisor -- a bit of a catch-22, that, and prevents you from being able to make use of the hash if you don't know your back-end. But... I do. So I created an associative array with all the current (and, God willing, future) hypervisor hostnames in my company, with the key being the hostId/hash, and the value being the hypervisor name. Then I queried my VMs, got all the hostIds, used that as the index to query my associative array, and bingo! My hypervisor's name. Kinda fugly, but when you have a standardized hypervisor hostname nomenclature, it's sufficient, without having to go mucking about with changing poorly-documented Nova policy.json stuff in a four-year-old release of OpenStack. I'll take it. Thanks! -Ken

On Thu, Nov 15, 2018 at 1:49 PM Ken D'Ambrosio <ken@jots.org> wrote:

...

Hey, all. We've got a Juno cloud, and we'd like various end-users to be able to see which hypervisors their VMs spring up on. /etc/nova/policy.json seems to have some relevant info, but it's hard to tell what does what. "compute_extension:hypervisors" looks like a possible candidate, but that's so vague that there's no telling what, exactly, is meant by "hypervisors". So:

* Given that I just want the hypervisor:VM association, any suggestions as to which rule(s) to modify? * Failing that, wondering if there's any for-real documentation on what the various options in policy.json *do*. I've found many, many lists of what's in a generic policy.json, but nothing that went into detail about what does what.

Thanks!

-Ken

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