Wednesday, 2016-11-02

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admin0morning all \o09:48
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yankcrimemorning10:17
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zioprotohello :)13:21
zioprotoserverascode: ping13:21
zioprotois anyone familiar with the new bridge mappings to have multiple external networks ? I noticed a change in bahavior of br-ext and br-int13:22
zioprotoI just wanted to make sure it is really a change in the default stuff, and I am not running on some weird settings13:22
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zioprotoserverascode: ping me when you are oline13:23
serverascodezioproto: hi13:24
zioprotoserverascode: hey there, are you familiar with the openvswitch plugin in neutron ?13:24
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serverascodekinda yeah13:25
zioprotoare you familiar with the fact that when you create a router in neutron, and you attach the external network, a new interface qg-* is created in the namespace13:25
zioprotoyou follow me up to here ?13:25
serverascodeyeah13:25
zioprotogreat, then openvswich kicks in, and adds the new qg interface into the external bridge, usually called br-ex or something13:26
zioprotoso that from the namespace you can see the external network13:26
zioprotoso you get a br-ex openvswitch bridge, where you have a bunch of qg-* interfaces in it, one for each router that has external connectivity13:27
zioprotomakes sense ?13:27
serverascodeyeah13:27
zioprotonow what is the change ? you can have multiple external networks and you can define bridge mappings.13:27
zioprotoin the file openvswitch_agent.ini13:27
zioprotoyou have something like13:27
zioprotobridge_mappings = physnet1:brex,physnet2:br-eth413:27
zioprotothis was kind of introduced recenrly13:28
zioprotoand I think this is mandatory in Mitaka13:28
serverascodeyup that is how I've setup multiple provider networks on different network interfaces13:28
zioprotowhat I noticed is that the qg-* interfaces are now created in the br-int… and then there are openvswitch patch interfaces to the various external bridges13:28
zioprotoI found funny that the qg-* interfaces are now all of them in br-int13:29
zioprotocan you confirm this is expected ?13:29
serverascodelet me look, I only have one system to look at right now...13:29
zioprotothat would be great ! :) thanks13:30
zioprotolet me know where your qg- interfaces land13:30
serverascodeactually in that system I only have provider networks so no neutron routers13:31
zioprotooh no13:31
zioprotoany hint where I can find this answer ?13:31
serverascodemaybe spin up a devstack?13:31
zioprotobecause I would expect the various qg- interfaces to go on the respective external networks bridges13:31
zioprotodo I get a network node with namespaces in devstack ?13:32
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serverascodebr-int does all the security groups/iptables so it doesn't surprise me13:33
serverascodebut I don't know for sure if that is what it is suppposed to look like13:33
zioprotosec groups iptables are actually implemented in the namespaces13:33
zioprotodo you mean13:33
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zioprotowhen you dont use iptables13:33
zioprotobut you use the new ovs sec groups ?13:33
zioprotothen they condensed all interfaces in br-int ?13:34
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serverascodeI know they are working on putting security groups into ovs, but I didn't think it was quite there yet13:35
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serverascodebr-int is an "integration bridge" that is used even when you use ovs to do iptables sec groups13:36
zioprotoreading this http://docs.openstack.org/developer/neutron/devref/layer3.html I would expect qg- interfaces in the br-ex13:36
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serverascodeyeah to be honest I just don't know much about that particular part as I always avoid letting neutron do l313:37
zioprotoOk, I will wrap up this question to an email to the operator mailing list of I dont find an answer here in the channel, thank you :)13:38
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zioprotoserverascode: I think I found the confirm that mine is the intended behaviour in this blog post: http://blog.oddbit.com/2015/08/13/provider-external-networks-details/13:41
serverascodeok cool13:44
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serverascodethat's actually a nice diagram13:44
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yankcrimezioproto: we have multiple provider networks and can confirm that's the expected behaviour13:55
yankcrimeit surprised me at first as well13:55
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yankcrimei'm sure i've seen explanations outside of larsks's blog, but i'd have to dig through my notes to find additional citations13:58
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zioprotoyankcrime: thanks !!! I am now updating my puppet composition layer to managed this mappings in the ini file14:02
zioprotoso at least I know I am making puppet code that makes sense14:02
zioprotoand my config is not broken :)14:02
yankcrimezioproto: it's pretty straightforward with the official puppet-neutron module14:05
yankcrimebut yeah, you're on the right track :)14:05
yankcrime(and we've been running like this for a good 18+ months)14:05
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