Monday, 2016-07-18

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catintheroofquick question, do you know the technical reason on why the mysql connection string went from mysql to mysql+pymysql ?14:51
dims_catintheroof http://markmail.org/message/6ujd3xcrk4ns256c14:56
dims_catintheroof : there's more in the mailing list http://openstack.markmail.org/search/?q=pymysql14:56
catintheroofdims_, thanks so much ! nice info !14:57
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catintheroofdims_, there i can search for all openstack mailing list's emails  ??15:01
dims_openstack-dev mailing list for sure15:02
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MVenesioHi guys, do you know if the functionality to bypass the images copy from a glance integrated with ceph and cinder also integrated with ceph works in the Juno version ?17:20
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klindgrenI thought people had local patches for that18:19
klindgrenbut unsure if anyone had that for the juno version18:19
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nicodemus_hello20:03
nicodemus_Does anybody know a guide to configure neutron-api behind apache? (if it is possible)20:03
nicodemus_I'd like to deploy using SSL, and there seem to be two options for production: SSL termination on nginx/haproxy, or having the neutron API with apache20:03
jlkNeutron API should support SSL20:06
jlklike, terminated on Neutron, but yeah it's not the best in production20:06
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nicodemus_jlk, yes the API supports it... but since most other projects recommend against it20:13
nicodemus_perhaps someone had the chance to test Neutron + apache20:14
xavpaiceyou talking about using mod_wsgi, or just a proxy?20:20
xavpaicewe're an nginx/uwsgi shop mostly, but fwiw swift wasn't running well like that so we termiate the ssl on nginx and proxy to swift listening on localhost20:21
xavpaiceplenty of ways to cut it :)20:21
nicodemus_xavpaice, I was thinking about mod_wsgi20:29
nicodemus_but, I guess I would go with the recommended / more stable way20:30
xavpaicecan't comment on what that is :)20:30
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klindgrenanyone with public use the QEMU guest agent?22:16
klindgrento make snapshots something better than crash consistent22:16
klindgrenhell - I will even open it up more.  Anyone here use openstack + qemu guest agent + the stuff tht was done in kilo for using the guest agent for snapshots22:17
klindgrenhttps://blueprints.launchpad.net/nova/+spec/quiesced-image-snapshots-with-qemu-guest-agent22:17
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klindgrenjlk xavpaice sorrison  clayton  ping on the above re: qemu-agent22:32
jlkWe do not use the agent22:33
claytonNickServ: neutron doesn't support an external wsgi server in mitaka, I think some of the work for that is scheduled for newton22:51
claytonklindgren: we don't, it seems like a good idea though22:51
xavpaiceklindgren: I think we've informally suggested to clients that they can use it, but afaik noone has22:52
klindgrenxavprince did you do any looking at the warning re: should only be used with trusted hosts?22:53
xavpaiceclayton: is there a list of which services do support an external wsgi?22:54
klindgrenxavpaice, even22:54
xavpaiceI quite like that typo, might use it22:54
claytonnot that I know of, I just remeber this being discussed in austin in one of the sessions22:54
claytonthe issue is that right now neutron server hosts both the wsgi stuff for the api, but also a bunch of stuff that with other services would be more of like a neutron-engine service22:55
claytonand those things have to be split apart22:55
xavpaicecool - I'm keen to move more services to external wsgi, but not all work particularly well so the benefits are lost22:55
xavpaiceklindgren: warning?  Nah, this is NZ, "no worries, mate!"22:55
klindgrenMPORTANT23:00
klindgrenNote that it is only safe to rely on the QEMU guest agent when run by trusted guests. An untrusted guest may maliciously ignore or abuse the guest agent protocol, and although built-in safeguards exist to prevent a denial of service attack on the host, the host requires guest co-operation for operations to run as expected.23:00
xavpaiceooh - got a link for that warning?23:01
xavpaicewould be good to share with the team23:01
klindgrenhttps://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Virtualization_Deployment_and_Administration_Guide/chap-QEMU_Guest_Agent.html#idp948771223:01
xavpaicethanks23:02
klindgrenhttp://wiki.libvirt.org/page/Qemu_guest_agent23:03
klindgrenHowever, guest agent (GA) is not bullet proof, and hostile guest OS can send spurious replies.23:03
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* xavpaice hopes those 'built-in safeguards' are enough23:04
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klindgrenhttp://wiki.qemu.org/Features/QAPI/GuestAgent23:05
klindgrenSecurity Considerations23:05
klindgrenThe following security issues need to be resolved in QMP:23:05
klindgrenThe JSON parser uses a recursive decent parser. Malicious input could potentially cause a stack overflow. Either implement a recursion depth counter, or switch the parser to only use tail recursion.23:05
klindgrenThe JSON parser may not handle premature EOI all that well. I think I've worked out most of these issues but more rigorous testing is needed.23:05
klindgrenunsure if that documentation is actually updated or not - possible that things have been fixed and like all docs - its out of date23:06
stickerthat warning there is what concerns me about allowing our customers to upload their own images.  I haven't investigated it fully but I think they can enable that socket by setting hw_qemu_agent=yes in the metadata for an image.  would be good to be able to globally disable it :/23:07
xavpaicethat page is from 2013, not sure if things have changed since23:10
klindgrensticker, yep thats how you enable it23:10
xavpaicegood posting at https://www.sebastien-han.fr/blog/2015/02/09/openstack-perform-consistent-snapshots-with-qemu-guest-agent/23:11
xavpaicebut without the warnings23:11
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klindgreninteresting that it has wanrings about possible security problems, and yet doesn't provide the cloud operator a way from disabling it23:17
klindgrenseems like thats a miss23:17
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stickerif i get a second to spare, i might take a look.  i've been wanting to see if I can contribute and that might be way to start23:24
klindgrensticker have you opened a thread on the dev mailing list about that?23:26
klindgrenas seems like a valid concern?23:26
stickerno, i'm not on the dev mailing list at the moment.  I'll sign up and send something now23:27
klindgrencool - I shall +1 that - because I have similar concerns as people internally are asking how can I get better than crash consistent backups in our public cloud - without having to shutdown the vm.23:29
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stickercool, have sent something, feel free to amend and clarify! :)23:47
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