TheGrebs.com:IRC Logs:#xen:2006:03:02

---	Log	opened Thu Mar 02 00:00:24 2006
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02:07	<DV_>	ADSL router crashed again yesterday
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03:43	<FloFri>	hello everyone, does someone know, if there is a kernel patch which combines xen and rsbac or at least a xen kernel patch for 2.6.13 or 2.6.14?
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10:12	<mcr>	I have been running 2.6.15-1.43_FC5hypervisor as on Dom0 for awhile.
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10:13	<mcr>	yum installed 2.6.15-1.1977_FC5hypervisor, so I tried it. Machine froze, refused to get past grub messages. (No XEN banner on serial console).
10:13	<mcr>	anyone have any similiar experiences? I ask before I file a bug report...
10:14	<aliguori>	does anyone else find using macro's for types really awkward?
10:14	<mcr>	macros for types?
10:14	<mcr>	you mean, like "FILE" ?
10:14	<aliguori>	for instance, guest_handle(ulong) extent_list
10:14	<aliguori>	no, not defines, actual macros
10:14	<mcr>	you mean, to generate the type.
10:14	<mcr>	yeah, it's annoying.
10:15	<mcr>	typedef guest_handle(ulong) my_guest_handle_ulong;
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10:28	<Dave`>	is there some documentation anywhere on the arguments that the XendClient API functions take?
10:28	<Dave`>	for instance, the parameters that can be given in the sxp to xend_domain_create() ?
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10:43	<Dave`>	I guess that means "nope, no documentation, have fun" :)
10:52	<rharper>	Dave`: you can try http://wiki.xensource.com/xenwiki/XenDocs first, I've not gone through all that is there to say whether the API in question is present, but that should get you started before you dive into code
10:52	<aliguori>	Dave`, do you really want to use XendClient?
10:52	<aliguori>	it's almost certainly going to go away in the near future
10:53	<Dave`>	aliguori: well, what else could I use to communicate with xend ?
10:53	<aliguori>	libvirt :-)
10:53	<rharper>	aliguori: are there any docs for libvirt stuff yet?
10:53	<aliguori>	yup
10:53	<aliguori>	a ton
10:53	<aliguori>	www.libvirt.org
10:54	<Dave`>	hmm, looks good
10:55	<Dave`>	aliguori: and libvirt supports all the functions currently available in XendClient?
10:55	<Dave`>	starting domains, reconfiguring them, adding devices, etc. ?
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10:56	<aliguori>	Dave`, it will eventually, if you have specific requests, you should bring them up on the mailing list
10:56	<aliguori>	the backend suppots the full protocol
10:56	<aliguori>	it's only a question of whether there's an interface for it
11:00	<Dave`>	hmm, I see.
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12:20	<hikenboot>	hello anyone know what Error: Device 2049 (vbd) could not be connected. Backend device not found
12:22	<murb>	sounds like it couldn't find the device to export.
12:23	<murb>	what does xm create -c -n -f say for the vbds?
12:23	<murb>	does it look sane?
12:24	<hikenboot>	Warning: The nics option is deprecated. Please use an empty vif entry instead:
12:25	<Dave`>	libvirt wants libxml2, right?
12:25	<hikenboot>	where is the vif option?
12:26	<hikenboot>	i dont see one in the config file
12:27	<murb>	hikenboot: sounds like something you don't have!
12:28	<murb>	vif = [ '' ] is what it wants i think
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14:06	<aliguori>	Dave`, yes it does
14:08	<Dave`>	yah, I got it to compile (a few problems finding libxml2).
14:09	<Dave`>	and I posted to the mailing list, regarding some stuff to implement :)
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14:15	<aliguori>	Dave`, and I replied :-)
14:16	<aliguori>	Dave`, pinning is the only thing I didn't implement in the backend.. it ends up being represented as a python list of integers and I didn't want to bother parsing that into a C bitmask
14:16	<aliguori>	it's not that difficult in principle.. the code to modify would be xend_internal.c around ~L1790ish
14:17	<aliguori>	you'd want to pull out domain/cpu_map i think and part that into a bitmask
14:17	<Dave`>	aliguori: okay, just a little bothersome to convert, but not impossible
14:17	<Dave`>	right
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14:44	<wired>	If i want to increase the ram on a container.. i use xm <container> <mem>
14:44	<wired>	it shows that it takes affect in xm list.. but do i have to bring down the container and bring it back up ?
14:44	<wired>	for the container to take it ?
14:47	<Shaun>	is it possible to patch domU with a grsecurity patch?
14:52	<wired>	Shaun: do you know if after I do a mem-set on a container if i need to reboot it ?
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14:57	<kmacy>	surriel: ping
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15:14	<jdmason>	jdmason
15:14	<jdmason>	oops
15:14	<tonfa>	:)
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18:54	<michal`>	hey
18:54	<michal`>	it is my 5 day when i am trying to get xen working
18:54	<michal`>	of course it is behaving like i suposed it to
18:54	<michal`>	read:
18:54	<michal`>	not working
18:56	<michal`>	since you do not remember
18:56	<michal`>	i am the one from
18:56	<michal`>	violet ~ # xm create -c /etc/xen/gentoo
18:56	<michal`>	Using config file "/etc/xen/gentoo".
18:56	<michal`>	Error: Error creating domain: (9, 'Bad file descriptor')
18:58	<aliguori>	is this xen 3.0.1?
18:58	<aliguori>	you most likely have a bad xm config
18:58	<michal`>	no i have good xm config
18:58	<aliguori>	are you 100% positive that the disk lines are good?
18:58	<michal`>	want to look at it ? i can pastebin it
18:58	<aliguori>	sure
18:58	<michal`>	sec
18:59	<michal`>	http://pastebin.com/581208
18:59	<michal`>	here you are
19:00	<michal`>	btw
19:00	<michal`>	stracing (what have took a long time because of all that python crap)
19:00	<michal`>	revealed that something is trying to write info fd -1
19:00	<michal`>	hence that error
19:01	<aliguori>	post /var/log/xend.log and /var/log/xend-debug.log too
19:02	<michal`>	http://pastebin.com/581210
19:03	<aliguori>	thanks, one sec, looking at both now
19:03	<aliguori>	michal`, the first link is lsmod output
19:03	<aliguori>	not config file :-)
19:03	<michal`>	http://pastebin.com/581211
19:03	<michal`>	http://pastebin.com/581210
19:03	<michal`>	and
19:04	<michal`>	http://pastebin.com/581209
19:04	<aliguori>	if you do a ps -ef \| grep xenstore do you see anything?
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19:04	<michal`>	yep it is working
19:04	<michal`>	root 5857 1 0 01:52 ? 00:00:00 xenstored --pid-file=/var/run/xenstore.pid
19:05	<michal`>	what's interesting
19:05	<aliguori>	did you custom compile your code?
19:05	<aliguori>	er
19:05	<aliguori>	kernel?
19:05	<michal`>	yes from xen-unstable
19:05	<michal`>	kernel 2.6.16-rc
19:05	<michal`>	rc 4 afair
19:05	<aliguori>	and your tools? are they also from xen-unstable?
19:05	<michal`>	yep
19:06	<michal`>	fetched last week
19:06	<aliguori>	well, introduceDomain is what's failing.. there's only a few things that can go wrong that will cause that to fail. a non-functioning xenstore would be one (try seeing if 'xenstore-list /' works)
19:07	<aliguori>	another would be tools/kernel/hypervisor mismatch
19:07	<aliguori>	in fact, that's the most common reason for such an error
19:07	<michal`>	violet ~ # xenstore-list /
19:07	<michal`>	tool
19:07	<michal`>	vm
19:07	<michal`>	local
19:07	<aliguori>	i haven't heard anyone else having this problem, and i haven't had it myself, which suggests that it's probably somethign about your system
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19:08	<michal`>	mix of hypervisor/kernel/tools is not possible, i have installed everything from one archive into clean system
19:08	<aliguori>	ok, are you positive that you're not using an old hypervisor?
19:08	<aliguori>	hrm
19:08	<aliguori>	is this a brand new gentoo?
19:08	<aliguori>	install
19:08	<aliguori>	what version of python is on your system?
19:09	<michal`>	not realy brand new
19:09	<michal`>	Python 2.4.2 (#1, Feb 10 2006, 23:47:21)
19:09	<michal`>	gcc version 3.3.5-20050130 (Gentoo 3.3.5.20050130-r1, ssp-3.3.5.20050130-1, pie-8.7.7.1)
19:09	<michal`>	violet ~ # ld -v
19:09	<michal`>	GNU ld version 2.15.92.0.2 20040927
19:10	<michal`>	glibc -2.3.6
19:10	<michal`>	vanilla compilator, without hardened and stuff
19:10	<aliguori>	i've been having some issues with a system that's using a newer version of python
19:10	<aliguori>	there may be problems with xend and newer pythons but i've not confirmed that
19:11	<michal`>	i can install arbitrary python version...
19:12	<aliguori>	i would recommend first trying 3.0.1... it's possible a regression's slipped in the past few weeks
19:12	<aliguori>	then try older versions of python
19:12	<aliguori>	and if that fails, open a bugzilla entry with as much info as you can.
19:12	<michal`>	python 2.3.5 here also, so i have some kind of fallback
19:12	<michal`>	which kernel version does 3.0.1 support ?
19:12	<michal`>	linux kernel
19:13	<michal`>	btw - after send start i should be getting peth0 and all those netowrk stuff half alive (like xenbr0)
19:13	<michal`>	i am not getting it somehow
19:13	<aliguori>	2.6.12
19:13	<michal`>	2.6.12 also fails here, tried last week, same problem
19:14	<michal`>	(from xen-testing)
19:14	<aliguori>	are you sure you have all the prereq packages installed?
19:14	<aliguori>	all the bridge utils and iputils
19:14	<michal`>	sure i am using bridges and stuff all the time
19:14	<michal`>	(just have disabled my casual configration for xen)
19:16	<aliguori>	michal`, you may also want to try just doing a make install. it's possible (although perhaps unlikely) that you're .config is messed up
19:16	<aliguori>	but i can't think of a think you could do that would cause introduceDomain to fail but not result in things not booting
19:16	<michal`>	using xen provided config does not mak it working, same error, have also tried this
19:17	<michal`>	(it is hard to find anything i ahve not)
19:17	<michal`>	what could make it misbehave ? you think it is purely userspace problem ?
19:17	<aliguori>	yeah, if you're just doing a make install on gentoo
19:18	<aliguori>	it's almost certainly a missing prereq or a version of something that xen doesn't like
19:18	<aliguori>	but i know a few people who use xen on gentoo and they haven't been having problems, so i lean toward missing prereq
19:18	<aliguori>	if there's a gentoo wiki entry on xen or something, you might want to at least double check
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19:21	<michal`>	nothing interesting there, have checked many times:/
19:21	<michal`>	what should i be looking for ?
19:22	<aliguori>	it would have to be missing prereqs
19:22	<aliguori>	but still, that should cause your particular problem...
19:23	<aliguori>	does /proc/xen/privcmd exist?
19:24	<michal`>	interesting,,,
19:24	<michal`>	violet ~ # cat /proc/xen/privcmd
19:24	<michal`>	cat: /proc/xen/privcmd: Invalid argument
19:24	<aliguori>	you can't cat it
19:24	<aliguori>	you shouldn't be able to
19:24	<michal`>	so i am not in fact
19:24	<michal`>	open("/proc/xen/privcmd", O_RDONLY\|O_LARGEFILE) = 3
19:24	<michal`>	fstat64(3, {st_mode=S_IFREG\|0400, st_size=0, ...}) = 0
19:24	<michal`>	read(3, 0x804c080, 4096) = -1 EINVAL (Invalid argument)
19:24	<aliguori>	yeah
19:24	<aliguori>	that's normal
19:25	<michal`>	ok
19:25	<michal`>	mayby binutils/gcc version ?
19:25	<aliguori>	no
19:25	<aliguori>	i doubt it
19:25	<aliguori>	ohhhh
19:25	<aliguori>	is there a /var/run/xenstored?
19:25	<michal`>	i have all of my system compilled using gcc 4, xen build with gcc 3.3 now
19:25	<michal`>	yep
19:26	<aliguori>	oh
19:26	<aliguori>	wait, yeah, it would have to if xenstored-read worked
19:27	<aliguori>	there's only two reasons for introduce_domain to return EBADF.. they are both things that should never happen
19:27	<aliguori>	can you kill xend
19:27	<aliguori>	kill xenconsoled and xenstored
19:28	<aliguori>	then start do:
19:28	<aliguori>	XENSTORED_TRACE=1 xend start
19:28	<aliguori>	try to create a domain
19:28	<aliguori>	and then check /var/log/xenstored-trace.log
19:28	<Dave`>	cool, I can query remote hypervisors with libvirt :-)
19:28	<aliguori>	Dave`, sweet! :-)
19:28	<Dave`>	aliguori: I'm having a problem with the python bindings though
19:29	<Dave`>	using libvirtmod directly works perfectly (after adapting the glue code)
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19:29	<aliguori>	Dave`, I've not looked at them
19:29	<Dave`>	but the prototype of libvirt.open() stays the same
19:29	<Dave`>	and I can't get it to regenerate
19:29	<Dave`>	which is annoying :)
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19:29	<Dave`>	aliguori: oh, okay.
19:30	<Dave`>	Well, I'll try to figure it out tomorrow and send the patch when they work.
19:30	[~]	aliguori wonders where DV got generator.py from
19:30	<aliguori>	maybe he wrote it from scratch
19:30	<aliguori>	it seems like using swig would be a better long term strategy..
19:31	<Dave`>	yah
19:31	<Dave`>	although swig is evil black magic
19:31	<aliguori>	yeah, seriously :-)
19:31	<aliguori>	but i've learned enough of the awkward syntax of it to actually wrap things :-)
19:31	<Dave`>	I've had to look at subversion's swig-py bindings at one point... Eugh.
19:32	<Dave`>	heh, lucky you
19:32	<Dave`>	I never really got it
19:32	<aliguori>	it took a lot of trial and error
19:33	<aliguori>	it's not nearly as bad as m4 :-)
19:33	<Dave`>	heh, let's not even go there :P
19:34	<Dave`>	ah, just another quick question - why is the coding style for libvirt.h and xen_internal.h not the same as xend_internal.h ?
19:34	<Dave`>	(and would anyone mind if I submitted a series of patches to make the style uniform accross the whole code, one way or another?)
19:35	<aliguori>	hehe
19:35	<aliguori>	libvirt is the combination of two libraries, DV's original libvirt and my libxend :-)
19:35	<Dave`>	ooh, I see.
19:35	<aliguori>	we obviously have different coding styles, I think the plan is to standardize on DV's style
19:35	<aliguori>	so the hungarian type stuff
19:36	<Dave`>	okay (shucks, I prefer the xend_internal style ;)
19:36	<aliguori>	heh
19:36	<aliguori>	well
19:36	<aliguori>	DV was open to changing it... so send a note to the list
19:36	<Dave`>	I'll bring it up once I've sent a patch... I don't want to start a holy war without having first contributed something ;)
19:36	<aliguori>	hehe
19:38	<f>	just do it. holy wars are fun.
19:39	<Dave`>	yah, but it's better if you have a vested interest in them
19:39	<Dave`>	just coming out of nowhere and starting a war is too obvious
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19:39	<Dave`>	much more fun if you have already sent a patch or two :P
19:39	<michal`>	aliguori: http://pastebin.com/581268
19:40	<michal`>	mayby that one will be interesting
19:40	<aliguori>	I think Xen has conditioned me to tolerate mixing of coding styles in, er, interesting ways
19:40	<Dave`>	heh
19:40	<Dave`>	hacking on Subversion has conditionned me the other way around
19:41	<Dave`>	my eyes burn if the style isn't uniform :)
19:43	<aliguori>	michal`, anything in dmesg?
19:44	<aliguori>	Dave`, do you have /proc/xen/xsd_{kva,port}?
19:45	<michal`>	noly
19:45	<michal`>	rtc: lost some interrupts at 1024Hz.
19:45	<michal`>	and a few messages from netowrking layer during bridge configuration (got it wokring)
19:45	<Dave`>	aliguori: on my dom0? I have /proc/xen/xsd_{mfn,port}.
19:46	<michal`>	531. IN 0x806c6b4 02:35:22 DIRECTORY (/local/domain/7/device/vif )
19:46	<michal`>	532. OUT 0x806c6b4 02:35:22 ERROR (ENOENT )
19:46	<michal`>	533. IN 0x806c6b4 02:35:22 DIRECTORY (/local/domain/7/device/usb )
19:46	<michal`>	534. OUT 0x806c6b4 02:35:22 ERROR (ENOENT )
19:46	<michal`>	from that log
19:46	<michal`>	and a few more
19:46	<michal`>	isn't it strange ?
19:46	<michal`>	asking because just after it domain gets destroyed
19:47	<aliguori>	no
19:47	<aliguori>	that's just xend cleaning up the domain during destruction
19:47	<aliguori>	s/Dave`/michal`/
19:47	<aliguori>	:-)
19:47	<aliguori>	michal`, do you have /proc/xen/xsd_{kva,port}?
19:48	<michal`>	violet ~ # ls /proc/xen/
19:48	<michal`>	balloon capabilities privcmd xenbus xsd_kva xsd_port
19:48	<aliguori>	yeah, i don't have a clue why you're getting that failure then
19:49	<aliguori>	it looks like your libxenstore is failing to speak to xenstored
19:49	<aliguori>	as in, there are protocol errors
19:49	<aliguori>	that would cause EBADF
19:49	<Dave`>	aliguori: :-)
19:49	<aliguori>	xend is clearly doing an introduceDomain but xenstored enver sees it
19:49	<michal`>	interesting...
19:50	<aliguori>	EBADF gets returned on premature EOF or a unexpected response (which would only be from corruption)
19:50	<michal`>	does it matter if i have frontend drivers in dom0 kernel option on or off btw ?
19:50	<aliguori>	nope
19:51	<aliguori>	i can try to duplicate on gentoo tomorrow.. please file a bug report though
19:52	<michal`>	ok, i'll do
19:52	<Dave`>	aliguori: if you care/feel like testing, http://natulte.net/pub/libvirt_remote.patch is the current patch (so with nonworking libvirt python module, only libvirtmod working).
19:52	<Dave`>	g'night all :)
19:52	<aliguori>	Dave`, night
19:52	<michal`>	nite Dave`
19:52	<Dave`>	gagh, that patch is unclean actually.
19:52	<Dave`>	should have distcleaned before building it
19:52	<Dave`>	oh well :)
19:52	<michal`>	recompiing both kernels and tools now, will remove everything xen releated and once again install
19:53	<aliguori>	Dave`, okay, then I'll hold comments :-)
19:54	<Dave`>	there, cleaned it... I think :)
19:54	<michal`>	[02:28:46][02:28:46] < Dave`> cool, I can query remote hypervisors with libvirt :-)
19:54	<michal`>	that's interesting, what it is about ?
19:55	<Dave`>	michal`: libvirt is a library to interact with the Xen hypervisor
19:55	<Dave`>	either for monitoring, or for altering the running domains
19:55	<Dave`>	right now it only works within dom0, connecting locally. I just patched it to allow connecting to a remote xend.
19:55	<Dave`>	not much to do, the code was pretty much there already :)
19:56	<michal`>	hey, i'm feeling like taking you out of the bed or whatever you use to sleep in.... sorry ;)
19:56	<michal`>	interesting concept anyway
19:56	<Dave`>	bah, I have class in 5hrs time... Operating systems 101 :P
19:57	<aliguori>	bah, college students don't actually sleep :-)
19:57	<Dave`>	I doubt there'll be a lot of chat about virtualization though :)
19:57	<aliguori>	probably not
19:57	[~]	aliguori had OS about a year ago O:-)
19:57	<aliguori>	we did talk about virtualization actually...
19:58	<Dave`>	michal`: my objective is to bring libvirt to the point where I can use it to write an admin panel for a xen hosting company.
19:58	<Dave`>	Well, and more later on, but that's my short term goal :)
19:58	<aliguori>	:-)
19:59	<Dave`>	anyways, off to sleep, for real this time.
19:59	<Dave`>	See ya tomorrow.
19:59	<aliguori>	cya
19:59	<michal`>	that will be pretty cool
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20:18	<michal`>	aliguori: if you are here...
20:19	<michal`>	got some interesting results
20:19	<michal`>	look
20:19	<michal`>	violet ~ # xm create -c /etc/xen/gentoo
20:19	<michal`>	Using config file "/etc/xen/gentoo".
20:19	<michal`>	Error: Device 0 (vif) could not be connected. Hotplug scripts not working.
20:19	<michal`>	violet ~ # xm list
20:19	<michal`>	Name ID Mem(MiB) VCPUs State Time(s)
20:19	<michal`>	Domain-0 0 256 1 r----- 3211.2
20:19	<michal`>	gentoo 8 128 1 --p--- 0.0
20:19	<michal`>	domain got created !
20:19	<michal`>	nvm that not exactly clean and working but, a whole lot better than it was
20:20	<michal`>	(manualy cleaned up system and installed xen tools/hypervisor by hand)
20:21	<aliguori>	do you have udev/hotplug working properly?
20:21	<michal`>	yep
20:21	<michal`>	and that xen files also copied there
20:22	<michal`>	gentoo might be doing about it during reboot, so will retry when i do(kernel compilation in progress)
20:22	<michal`>	got dmesg from that
20:22	<michal`>	and kernel panic - VFS: Cannot open root device "hda1" or unknown-block(0,0)
20:23	<michal`>	but it is probably jsut a matter of tuning kernel conf now
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20:34	<michal`>	anyway, off to sleep now
20:34	<michal`>	will continue tommorow
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23:55	<hikenboot>	anyone in here good with xen networking?
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23:58	<hikenboot>	when i add eth0 to bridge brxen0 I can pick up an ip address from my dhcp server but then a few minutes later my route to the internet disappears and the route command hangs printing routing table...any ideas how to resolve this?
---	Log	closed Fri Mar 03 00:00:14 2006