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
