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retitle Traffic forwarding issue between Xen domU/dom0 thanks This week again this bug occurred again so we are trying to create some kind of reproduce algorithm. First we've created two virtual machines named koekiemonster.bofh.hq.mendix.net and netappsim.bofh.hq.mendix.net. We've added 29 vifs to koekiemonster.bofh.hq.mendix.net. During this tests we've always had a ping running to all ip addresses on koekiemonster.bofh.hq.mendix.net. Dom0 details: Debian Squeeze 6.0.6 Linux sirius 2.6.32-5-xen-amd64 #1 SMP Sun Sep 23...

...er we switched on HT together with the lenny->squeeze (xen 3->4) upgrade, this issues started to pop up weeks later in production. The obscure bug did not bite during upgrade-testing. :| Thanks, -- Hans van Kranenburg - System / Network Engineer T +31 (0)10 2760434 | hans.van.kranenburg at mendix.com | www.mendix.com

...r when the vifname is already in use. The patch applies to unstable, but it's very easy to port to xen-utils-common in squeeze, which I'll be doing myself (been there, done that). The effect, when I try to configure a vifname of "pietje" for two domU's looks like: mu.mgt.xs4.mendix.net:/etc/xen/guests 2-# xm create -c tomato Using config file "./tomato". mu.mgt.xs4.mendix.net:/etc/xen/guests 2-# Error: Device 0 (vif) could not be connected. Cannot rename interface vif40.0. An interface with name pietje already exists. Please consider adding the patch, and/or sendin...

...26fdc+dfsg-2~bpo9+1) ... So it seems a file has moved to another package, and the order in which they are upgraded matters. In the end I still have xen-hypervisor-4.8-amd64 and libxen-4.8, all other packages are 4.11-blah. ---- >8 ---- 5. Try to still use 4.8 -# xen create -c blaat.bofh.dpl.mendix.net Parsing config from blaat.bofh.dpl.mendix.net libxl: info: libxl_create.c:105:libxl__domain_build_info_setdefault: qemu-xen is unavailable, using qemu-xen-traditional instead: No such file or directory xenconsole: Could not read tty from store: Success There's no xenconsoled process any mo...

...d64 4.0.1-4 -> 4.0.1-5.2 and linux-image-2.6.32-5-xen-amd64 2.6.32-41squeeze2 -> 2.6.32-45) This setup is using Debian GNU/Linux, with Xen 4.0 and the Debian 2.6.32 kernel and Openvswitch 1.4.0-1 packages from Debian (30 Jan 2012) which I repackaged for use with squeeze. (http://packages.mendix.com/debian/pool/main/o/openvswitch/) ii libxenstore3.0 4.0.1-5.2 Xenstore communications library for Xen ii linux-image-2.6-xen-amd64 2.6.32+29 Linux 2.6 for 64-bit PCs (meta-package), Xen dom0 support ii linux-image-2.6.32-5-xen-amd64...

...es for Jessie, as it will help to prevent scaring people away from choosing Debian to run Xen on their servers for the next few years. :-) The simple revert-patch I'm using is attached. Thanks, -- Hans van Kranenburg - System / Network Engineer T +31 (0)10 2760434 | hans.van.kranenburg at mendix.com | www.mendix.com -------------- next part -------------- A non-text attachment was scrubbed... Name: zz-0001-Revert-x86-honor-ACPI-indicating-absence-of-CMOS-RTC.patch Type: text/x-diff Size: 1137 bytes Desc: not available URL: <http://lists.alioth.debian.org/pipermail/pkg-xen-devel/attachme...

Whoops, that patch is obviously missing an extra line containing a fi statement. Fixed version attached. And configurating is obviously not english. :) -- Hans van Kranenburg - System / Network Engineer T +31 (0)10 2760434 | hans.van.kranenburg at mendix.com | www.mendix.com -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: vif-common.sh.diff.xen-4.1.2 URL: <http://lists.alioth.debian.org/pipermail/pkg-xen-devel/attachments/20120201/d0cb796e/attachment.ksh>

...cc_compiler : gcc version 4.7.2 (Debian 4.7.2-4) cc_compile_by : waldi cc_compile_domain : debian.org cc_compile_date : Tue Dec 4 09:52:37 UTC 2012 xend_config_format : 4 -- Frank Baalbergen - System / Network Engineer T +31 (0)10 2760434 | frank.baalbergen at mendix.com | www.mendix.com

Obviously i meant hyperthreading. Probably need more coffee:) -- Frank Baalbergen - System / Network Administrator T +31 (0)10 2760434 | frank.baalbergen at mendix.com | www.mendix.com

...nly an option which can be given to also pause the domain (-L, --live Dump core without pausing the domain.) this was looking suspicious anyway. Thanks to lindi for checking the source and confirming. -- Hans van Kranenburg - System / Network Engineer T +31 (0)10 2760434 | hans.van.kranenburg at mendix.com | www.mendix.com

Package: xen-hypervisor-4.0-amd64 Version: 4.0.1-2 Severity: grave File: xen Justification: renders package unusable Debian Squeeze Dom0, up to date. Networking is handled by OS scripts, such that br0 and br1 are bridge interfaces. Without warning, the DomU (Ubuntu 10.04 LTS) loses inbound connectivity. It tends to happen after several hours. It doesn't seem to be affected by throughput

On Mon, Jan 07, 2019 at 08:44:50AM +0000, Colin Watson wrote: > On Mon, Jan 07, 2019 at 01:58:19AM +0100, Hans van Kranenburg wrote: > > Ok great. Since I'm not using (and probably not going to use) the > > multi-stage multiboot things, this is harder for me to help with. > > With any luck I should be able to work that bit out myself, since I > think stable's Xen

...ready, and then put module stuff and a grub.cfg on the domU filesystem. If that works, then it's a matter of figuring out how to get that grub-i386-xen_pvh.bin and the modules built in the packaging? Thanks, Hans [0] Background of the whole story how we ended up doing so for PV: https://tech.mendix.com/linux/2014/09/06/pvgrub2/ https://tech.mendix.com/linux/2014/09/16/pvgrub2-live/

Hi Debian Grub maintainer, In december, Xen PVH support has been committed in grub master: https://www.mail-archive.com/grub-devel at gnu.org/msg28125.html The last pieces needed in the Linux kernel to boot PVH with grub2 landed in Linux 4.20. I asked our kernel team to carry those patches on top of the Linux 4.19 kernel that is going to ship in Buster, and that wish was granted:

..., and we didn't want to rely on that degree of cooperation. > (However, if you're operating a Xen host and that approach works for > you, by all means go for it! I understand that there exist environments > where that approach is more convenient.) Yup, that applies to our case at Mendix. We have roughly 7k domUs in total (almost 15TiB of physical ram) running customer production environments and they are all very much alike. Control that the customer has is on a way higher level than shell access, so just choosing the right pre-built standalone image with the right linux boot comm...

Package: xen-utils-3.2-1 Version: 3.2.1-2 Severity: wishlist Hi, this morning I spend some time to find out how to log console output of Xen guest domains into a file in dom0. I ended up using a quick 'n dirty solution: mario:/usr/lib/xen-3.2-1/bin 0-# diff -u xend.orig xend --- xend.orig 2009-03-02 16:49:49.000000000 +0100 +++ xend 2009-03-02 16:16:03.000000000 +0100 @@ -100,7 +100,8 @@

...Hi! I'd like to help with the Xen packaging in Debian. Long version: Q: Who are you? How are you related to Debian an the Xen project? A: Hi, I'm Hans van Kranenburg, nickname Knorrie, I live in the Netherlands. I'm a Debian user since 2002, and have been using Debian and Xen at work (Mendix) since 2006, which has grown from a handful dom0s with 4GiB memory each to a bunch of clusters with let's say somewhere between 10TiB and 20TiB of physical memory in the dom0s together, running a production environment for customer application hosting. My general interests are filesystems and...

Hi Ian, team, In the week of Feb 23 (time flies!:), we had a very productive day \o/ working on the stretch security/stable package and some irc discussions in oftc #debian-xen which ended with an open end. Ian, you were a bit surprised that 1) my debian-xen repo started with an import of a 4.8 package 2) it was not a git-pbuilder style repo with upstream source included, and asked me to at