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| edmondsw | efried it seems the biggest problem with using these fake PCI addresses is that an operator filling out the conf won't know how to get that... | 13:47 |
|---|---|---|
| edmondsw | why does nova care about the format of those addresses? | 13:47 |
| efried | The operator doesn't need to know about the fake PCI addresses as yet. | 13:47 |
| edmondsw | they will to fill out a conf that adds address= to the whitelist | 13:48 |
| efried | because they assume they can access /sys/bus/.../<pci_address>/blah/blah | 13:48 |
| efried | Yeah, so if we need to do that, and we get to a point where we *can* do that, we're going to need to provide access to the spoofed PCI addresses via pvmctl. | 13:48 |
| edmondsw | ugh | 13:48 |
| efried | We're going to need to doc how to get the vendor & product ID from pvmctl anyway. | 13:49 |
| efried | Cause they're called pci_vendor_id and pci_dev_id, respectively, right now. | 13:49 |
| efried | We could add @property aliases for them to allow them to be gotten by a more expected name. | 13:49 |
| edmondsw | sure, but that makes sense, vendor/product IDs are real things, and they're already there | 13:50 |
| efried | And we could add a @property for pci_address too - though I would want to name it carefully so as not to imply that it's a *real* PCI address. | 13:50 |
| efried | Could do it via pvmctl, or via some other CLI utility we ship with nova-powervm. | 13:50 |
| edmondsw | I get that nova assumes they can access /sys/bus... but they don't need to here, so they shouldn't care in this flow... i.e. we should be able to propose nova changes to no longer care about this format, right? | 13:50 |
| efried | I'm still on the fence about whether to do the PCI address spoofing in pypowervm or in nova. | 13:51 |
| edmondsw | I'd rather go down the "fix nova" road until we hit a roadblock there, before going down the "hack pvm" road | 13:51 |
| efried | You mean so we can use something arbitrary (like the DRC index) as the address? | 13:51 |
| edmondsw | yeah, whatever makes sense... I thought there was something more user friendly than drc | 13:52 |
| efried | The location code. But same point. | 13:52 |
| edmondsw | yep | 13:52 |
| efried | Right now the whitelist code is heavily invested in storing and validating PCI addresses as domain:bus:slot.func. | 13:53 |
| efried | And doing the whitelist x alias filtering based on that format | 13:53 |
| efried | including the ability to wildcard any of those components. | 13:53 |
| edmondsw | right... that rings a bell... so that's what would have to change | 13:53 |
| efried | So if you whitelisted *:12:ab.*, you would match a device with address abcd:12:ab.7 but not abcd:13:ab.7 | 13:54 |
| efried | Yeah, I would expect a LOT of resistance getting that setup overhauled. | 13:54 |
| efried | That said, it *may* be the case that the new resource provider work would lend itself to bypassing that entire shenanigans. | 13:56 |
| edmondsw | we can try, at least :) I thought talking to Jay in Boston he agreed that this was a mess and really shouldn't be PCI address-specific | 13:57 |
| edmondsw | but of course that's just one person we'd need to win over | 13:57 |
| efried | edmondsw I'm talking about it in -nova. Don't yet have the attention of the right people, but stephenfin and cdent are listening. | 14:07 |
| edmondsw | efried cool... I'm on a call, but I'll try to keep up as I can | 14:08 |
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| openstackgerrit | Matt Rabe proposed openstack/nova-powervm master: Add PPT ratio value to supported flavor fields https://review.openstack.org/497977 | 16:34 |
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| openstackgerrit | Taylor Jakobson proposed openstack/nova-powervm master: Add support for ceph volumes https://review.openstack.org/484478 | 18:18 |
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| openstackgerrit | Taylor Jakobson proposed openstack/nova-powervm master: Add support for ceph volumes https://review.openstack.org/484478 | 21:04 |
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