Mike wrote: > Izik Eidus schrieb: > >> Mike wrote: >> >>> Izik Eidus schrieb: >>> >>> >>>> Mike wrote: >>>> >>>> >>>>> Izik Eidus schrieb: >>>>> >>>>> >>>>> >>>>>> Mike wrote: >>>>>> >>>>>> >>>>>>> Hello, >>>>>>> I have a problem with my virtual machines. I am using kvm53 >>>>>>> on an AMD Athlon(tm) 64 X2 Dual Core Processor 5000+. >>>>>>> As distribution I use Ubuntu server 7.10. >>>>>>> As kernel I use Linux 2.6.22-14-server #1 SMP Sun Oct 14 22:09:15 >>>>>>> GMT 2007 x86_64 GNU/Linux. >>>>>>> >>>>>>> I have 3 different vms running. At the beginning they all work >>>>>>> without a problem. >>>>>>> Then, after one moment to another one or more stop working. >>>>>>> I did a ping test to all the machines, the vm with the failure >>>>>>> stops pinging. >>>>>>> The result from external ping: Destination host unreachable. >>>>>>> The same result from a ping onto the main server. >>>>>>> >>>>>>> Here are my configuration files: >>>>>>> cat /etc/qemu-ifup >>>>>>> #!/bin/sh >>>>>>> /sbin/ifconfig $1 0.0.0.0 promisc up >>>>>>> /usr/sbin/brctl addif br0 $1 >>>>>>> sleep 2 >>>>>>> ------------------------------------------------------------------------ >>>>>>> >>>>>>> >>>>>>> cat /etc/network/interfaces >>>>>>> auto lo >>>>>>> iface lo inet loopback >>>>>>> >>>>>>> auto br0 >>>>>>> iface br0 inet static >>>>>>> address 195.24.77.169 >>>>>>> netmask 255.255.255.0 >>>>>>> gateway 195.24.77.1 >>>>>>> bridge_ports eth0 >>>>>>> bridge_stp off >>>>>>> bridge_maxwait 5 >>>>>>> ------------------------------------------------------------------------ >>>>>>> >>>>>>> >>>>>>> I use scripts for starting the vms: >>>>>>> kvm -hda apache.img -hdb apache_storage.img -m 512 -boot c -net >>>>>>> nic,vlan=0,macaddr=00:16:3e:00:00:01 -net tap -nographic -daemonize >>>>>>> kvm -hda postfix.img -m 512 -boot c -net >>>>>>> nic,vlan=0,macaddr=00:16:3e:00:00:12 -net tap -nographic -daemonize >>>>>>> kvm -hda openvpn.img -m 256 -boot c -net >>>>>>> nic,vlan=0,macaddr=00:16:3e:00:00:03 -net tap -nographic -daemonize >>>>>>> ------------------------------------------------------------------------ >>>>>>> >>>>>>> >>>>>>> The tapN devices are being created at the startup of the vms. >>>>>>> >>>>>>> When I run dmesg I have this: >>>>>>> [ 112.390943] br0: port 2(tap1) entering learning state >>>>>>> [ 112.391919] br0: port 3(tap0) entering learning state >>>>>>> [ 112.397605] br0: port 4(tap2) entering learning state >>>>>>> [ 122.674313] tap0: no IPv6 routers present >>>>>>> [ 122.729185] tap1: no IPv6 routers present >>>>>>> [ 122.843901] tap2: no IPv6 routers present >>>>>>> [ 123.336081] kvm: emulating exchange as write >>>>>>> [ 127.367940] br0: topology change detected, propagating >>>>>>> [ 127.367949] br0: port 4(tap2) entering forwarding state >>>>>>> [ 127.362971] br0: topology change detected, propagating >>>>>>> [ 127.362977] br0: port 2(tap1) entering forwarding state >>>>>>> [ 127.362978] br0: topology change detected, propagating >>>>>>> [ 127.362980] br0: port 3(tap0) entering forwarding state >>>>>>> >>>>>>> No indication of a problem, nowhere in the log files. >>>>>>> >>>>>>> I don't know if the vms are freezing, or the network forwarding >>>>>>> stops working. >>>>>>> I also activated "net.ipv4.conf.default.forwarding=1" >>>>>>> >>>>>>> I googled days for that problem, but without a result. >>>>>>> I hope that maybe you have a solution for this problem. That >>>>>>> would be great, because I prefer using kvm instead of other >>>>>>> virtualization systems. >>>>>>> >>>>>>> Thank you very much in advance, >>>>>>> Greetings from Luxembourg. >>>>>>> >>>>>>> Have a nice day, >>>>>>> Mike >>>>>>> >>>>>>> >>>>>> it might be not the network that die, but the whole vm >>>>>> can you run the vms with -vnc ? (first vm -vnc :1 secoend vm -vnc >>>>>> :2 third vm -vnc :3) >>>>>> and try to connect to them with vncviewer and see if they are alive? >>>>>> >>>>>> >>>>>> >>>>> Thank you for your reply. >>>>> I can't connect to the vm if it has died, even with vnc. I tried >>>>> this already, no reply from the host. >>>>> I don't have physical access to the server because its located in a >>>>> dc. Only ssh to the host. >>>>> >>>>> >>>> ok this mean there is bug in kvm for amd and it not realted to the >>>> network >>>> what is the guest that you use? is it 64/32? >>>> >>>> >>>> >>> I'm using Debian Etch 32 Bit for all guests >>> with Kernel Linux apache 2.6.18-5-486 #1 Tue Oct 2 23:38:54 UTC 2007 >>> i686 GNU/Linux >>> >>> ------------------------------------------------------------------------- >>> >>> >>> >> ok but what more interesting me is: >> if you run just one vm >> is it work? >> > Yes. If I run only 1 vm, it runs days without problems. > I have sometimes have peaks in reply time from the guest. > e.g. > bytes=32 time=34ms TTL=57 > bytes=32 time=34ms TTL=57 > bytes=32 time=119ms TTL=57 > bytes=32 time=400ms TTL=57 > bytes=32 time=540ms TTL=57 > bytes=32 time=947ms TTL=57 > bytes=32 time=754ms TTL=57 > bytes=32 time=850ms TTL=57 > bytes=32 time=925ms TTL=57 > bytes=32 time=2032ms TTL=57 > bytes=32 time=897ms TTL=57 > bytes=32 time=197ms TTL=57 > bytes=32 time=34ms TTL=57 > bytes=32 time=34ms TTL=57 > > but if I ping the host server the same time, the reply time is normal, > around 34ms > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > kvm-devel mailing list > kvm-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/kvm-devel > ok sound interesting, you are sure you are using kvm53 modules? (one issue like that solved at kvm53, but maybe we have another one...)
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