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| gameon | Hi everyone, are there any drawbacks to running OpenStack using Intel Controllers and a mix of AMD and Intel compute nodes? (I know live migration won't work between AMD and Intel nodes)? | 12:07 |
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| yoctozepto | gameon: live migration might work as well depending on what compute capabilities you define :-) | 12:09 |
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| gameon | Oh thats great. I was looking at controllers with dual 16c Intel E5-2630 v3 and 256G RAM, is that adequate for say 10 compute nodes, each with 20 VMs? | 12:10 |
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| DHE | gameon: you can configure libvirt to send fake cpu capability info to the VMs to flatten everything to the lowest common denominator, though you must define that yourself. so your intel systems will lose avx512 support, etc but inter-host migration can work | 13:13 |
| DHE | I'm running a couple of 2socket 12core hyperthreaded systems with 192 GB of RAM. works fine as long as your needs are met. generally you can't oversubscribe RAM (for the love of god, avoid swap on the host!) and the CPU oversubscription ratio can be configured | 13:14 |
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| Statscowski | I already asked this last friday, so apologies for repeating myself. I was asked a few questions then which i unfortunately couldn't answer at the time. Thought I'd try my luck again. :) I have an openstack environment freshly deployed with kolla. Largely vanilla, but we are trying to make it work with BGP dynamic routing. openstack is sending the routes but not receiving any back. | 13:24 |
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| frickler | Statscowski: this is the expected behaviour, openstack only sends routes, it doesn't receive and use any routing information, you'll still need to define a setup a standard gateway for each of your subnets | 13:42 |
| gameon | dhe: Thanks very much. Compute I definitely won't be overcommiting RAM! I _think_ 32 cores for controllers would be adequate | 13:42 |
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| DHE | oh, just the controller? I'm running a 4 core VM (non-Openstack, old infrastructure) for that. it's a little underpowered but manages | 13:44 |
| frickler | 256G also seems quite a lot for a controller, we do fine with 32G and these also are running ceph-mon in addition. also 8 cores would seem fine, I'd rather target higher freq than more cores | 13:47 |
| DHE | ^^ agreed | 13:51 |
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| Statscowski | frickler: oh~, all right that clarifies things. thank you | 13:55 |
| Statscowski | man theres so much to learn :) | 13:56 |
| DHE | yeah mine has 8 GB of RAM and also runs a small RPM repo containing the openstack pacakges and a Ceph monitor | 14:03 |
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| ignatenkobrain__ | hello folks | 18:42 |
| ignatenkobrain__ | I was debugging a problem in our OpenStack installation where it takes around 40s to build an instance | 18:42 |
| ignatenkobrain__ | and I found out that this is due to preparation for configdrive metadata | 18:42 |
| ignatenkobrain__ | openstack/2012-08-10/meta_data.json and such | 18:43 |
| ignatenkobrain__ | it generates bunch of jsons we are not using, but it seems to be hardcoded in nova | 18:43 |
| ignatenkobrain__ | for version in ALL_OPENSTACK_VERSIONS: … | 18:43 |
| ignatenkobrain__ | does anyone know how to disable some of them to be disabled and/or how to make this generation faster? | 18:44 |
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| ozzzo | hi ignatenkobrain | 18:55 |
| ozzzo | I don't know the answer to your question, but if I did I would ask you for more information, such as your openstack version and how you built it | 18:56 |
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| ozzzo | and I'd ask you to pastebin some config and error messages | 18:56 |
| ozzzo | also I might ask if 40 seconds to build an instance is so bad. That's about what my instances take. Why do you think that is too long? | 18:57 |
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