Tuesday, 2016-05-03

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openstackgerritRyan Moats proposed openstack/networking-ovn: WIP: Update OVN reference architecture documentation  https://review.openstack.org/31191802:18
openstackgerritRyan Moats proposed openstack/networking-ovn: WIP: Update OVN reference architecture documentation  https://review.openstack.org/31191802:23
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openstackgerritNa Zhu proposed openstack/networking-ovn: Add configuration for router admin state  https://review.openstack.org/29983503:08
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-openstackstatus- NOTICE: Filesystem on logs.openstack.org is broken, we are on the process of repairing it. Please stop checking your jobs until further notice06:45
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*** ChanServ changes topic to "http://docs.openstack.org/developer/networking-ovn/ -=- OVN meeting Thursdays 10:15am Pacific / 1:15pm Eastern #openvswitch -=- Tempest health: http://goo.gl/9MaBJC"08:25
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openstackgerritJun Jie Nan proposed openstack/networking-ovn: Fixed vagrant download link  https://review.openstack.org/31200409:52
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openstackgerritMerged openstack/networking-ovn: Fixed vagrant download link  https://review.openstack.org/31200412:56
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openstackgerritMatthew Kassawara proposed openstack/networking-ovn: WIP: Update OVN reference architecture documentation  https://review.openstack.org/31191813:38
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* regXboi wanders in14:53
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openstackgerritMatthew Kassawara proposed openstack/networking-ovn: WIP: Update OVN reference architecture documentation  https://review.openstack.org/31191815:06
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openstackgerritMerged openstack/networking-ovn: Add initial newton release note  https://review.openstack.org/31174015:41
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kevinbentonmestery: hi!18:13
mesterykevinbenton: Hi!18:13
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kevinbentonmestery: i have question about how security groups are implmentend in OVN. who is best to bother?18:14
Sam-I-Amwhen in doubt, regXboi :)18:14
mesterykevinbenton: At the moment, I'd say you can ask regXboi18:14
mesterySam-I-Am: jinx!18:14
Sam-I-Amhe's "that guy"18:14
kevinbentonregXboi: you have a sec?18:14
Sam-I-Amhe's on the phone18:15
kevinbentontell him to hang up18:15
kevinbenton:)18:15
kevinbentoni'll be back in a bit then18:15
mesterylol18:15
mesteryHe's here18:15
mesteryJust talking on a clal18:15
kevinbentonack18:15
kevinbentonregXboi: ping when you're free18:15
regXboikevinbenton: will be top of the hour, and then, yes18:16
kevinbentonregXboi: ack18:17
Sam-I-Amkevinbenton: he just needs to multitask better18:19
Sam-I-Ami hear he's good at punch card batch processing18:19
regXboiSam-I-Am: nice :)18:20
regXboikevinbenton: security groups are implemented in OVN via ACLs that are translated into OF rules - there is an outstanding patch set to add the concept of Address Sets for handling remote security groups18:22
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kevinbentonregXboi: so my question is about re-assembly of fragmented packets18:53
kevinbentonregXboi: in iptables, it will re-assemble fragmented packets and then refragment based on the MTU of the bridge the filtering is happening on18:53
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regXboihmm... I'm not 100% where re-assembly occurs currentlyu18:54
kevinbentonregXboi: does the OVS filtering do the same thing? I ask because in the MTU stuff we were working on, OVS effectively had no MTU to set18:54
kevinbentonregXboi: so I was curious how it would know what to fragment to18:55
Sam-I-Amthe impression i get is that mtu is sort of 'magic'18:55
Sam-I-Amin ovs18:55
Sam-I-Amthe way processing works has no concept of conventional mtu18:55
regXboikevinbenton: excellent questions - I admit to needing to go look at the code, because I know there is fragment code in it, but I've not looked at it closely to date18:56
Sam-I-Amkevinbenton: you might also get a better answer in #openvswitch18:56
Sam-I-Amor a faster one18:56
kevinbentonregXboi: ok. just something to keep in mind. it's one of those weird things where you won't notice until some ancient UDP app that refuses to use smaller packets tries to run on your infra18:57
regXboikevinbenton: ack18:58
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regXboiso kevinbenton, my first answer is that when OVN applies connection tracking to a flow, a side effect is fragments are reassembled19:01
kevinbentonmakes sense, same behavior as iptables in that regard19:02
regXboiI'm still looking for other places19:02
regXboikevinbenton: refragmenting looks like it occurs anytime a packet is output to a port, and looking at the code makes me think that OVS uses the MTU of the inteface the port connects to19:06
kevinbentonregXboi: excellent. ideal behavior then19:06
kevinbentonregXboi: thx for checking'19:06
regXboikevinbenton: sure19:06
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switchcadeweird irssi bug, I was listening on this channel but irssi thought it was on a completely different network so it wouldn't let me respond...20:04
switchcaderegXboi: OVS refragmentation will use MRU size20:05
switchcadewhen assembling, it tracks the largest fragment for the message, then on output it will attempt to refragment the message using that size20:05
switchcadekevinbenton: ^20:06
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kevinbentonswitchcade: ack. that works too :)20:09
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mikeymikeHi all, does OVN currently support metering?20:09
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regXboimikeymike: what do you mean by "metering"?20:12
mikeymikeMonitoring tenant bandwidth20:13
regXboias in, support for the metering extention of Neutron?20:14
mikeymikeI suppose both the metering extension in Neutron, and the (optional?) OpenFlow specification for metering20:15
regXboiI don't know if anybody has tried it20:17
regXboiit == the metering extension for Neutron20:17
regXboiFor the openflow specification, I'd ask over in #openvswitch20:17
switchcadeOVS doesn't support metering.20:17
switchcadethere's been some interest, but not enough to drive it in20:18
mikeymikeThanks for letting me know. Got the following when I tried from the OVN vagrant images: none of the usable flow formats (OXM-OpenFlow13,OXM-OpenFlow14,OXM-OpenFlow15) is among the allowed flow formats (OpenFlow10,NXM)20:18
regXboithanks, switchcade20:19
mikeymikeFrom the command: sudo ovs-ofctl dump-meters br-int20:19
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