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Device 0 (vif) could not be connected. Hotplug scripts not working.
by Pierre-Philipp Braun 15 Apr '08

15 Apr '08

Hi, I got this error when starting a domU on Centos 5.1 i386, Device 0 (vif) could not be connected. Hotplug scripts not working. Why is this happening ? I should restart the machine to see if this still happends after a fresh network bridge. But it's somehow a production server, I would like not to restart it, if possible. No domU is currently running. I could start domUs a week ago. Here are the troubbleshooting information I have (everything seems fine), - Centos 5.1 xen-3.0.3 and kernel 2.6.18-53 - ifconfig -a shows, eth0, lo, peth0, sit0, veth1, veth2, veth3, vif0.0, vif0.1, vif0.2, vid0.3 and xenbr0. - brctl show, bridge name bridge id STP enabled interfaces xenbr0 8000.feffffffffff no peth0 vif0.0 - activated/deactivating iptables doesn't change anything. Note, securitylevel and SELinux are disabled. Currently deactivated, Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination - xm list -ll (domain (domid 0) (uuid 00000000-0000-0000-0000-000000000000) (vcpus 1) (cpu_weight 1.0) (memory 513) (shadow_memory 0) (maxmem 513) (features ) (name Domain-0) (on_poweroff destroy) (on_reboot restart) (on_crash restart) (state r-----) (shutdown_reason poweroff) (cpu_time 286092.966925) (online_vcpus 1) ) - loop_max is updated to 20 (which doesn't matter as I've got the vif issue, not vbd), kernel: loop: loaded (max 20 devices) - /etc/udev/rules.d/xen-backend.rules exists, SUBSYSTEM=="xen-backend", KERNEL=="tap*", RUN+="/etc/xen/scripts/blktap $env{ACTION}" SUBSYSTEM=="xen-backend", KERNEL=="vbd*", RUN+="/etc/xen/scripts/block $env{ACTION}" SUBSYSTEM=="xen-backend", KERNEL=="vtpm*", RUN+="/etc/xen/scripts/vtpm $env{ACTION}" SUBSYSTEM=="xen-backend", KERNEL=="vif*", ACTION=="online", RUN+="$env{script} online" SUBSYSTEM=="xen-backend", KERNEL=="vif*", ACTION=="offline", RUN+="$env{script} offline" SUBSYSTEM=="xen-backend", ACTION=="remove", RUN+="/etc/xen/scripts/xen-hotplug-cleanup" KERNEL=="evtchn", NAME="xen/%k" KERNEL=="blktap[0-9]*", NAME="xen/%k" - udev is running, root 21499 0.0 0.1 2240 624 ? S<s 15:40 0:01 /sbin/udevd -d root 22744 0.0 0.1 2044 568 pts/8 S 15:43 0:00 udevmonitor - hald is running, 68 23539 0.0 0.6 5184 3280 ? Ss 16:23 0:00 hald root 23540 0.0 0.1 3128 952 ? S 16:23 0:00 hald-runner 68 23546 0.0 0.1 1988 776 ? S 16:23 0:00 hald-addon-keyboard: listening on /dev/input/event0 - /proc/sys/kernel/hotplug is empty (which is ok for Centos, I guess, as hald is used instead of hotplug) - udevmonitor doesn't say anything - /bin/sh correctly links to bash (unlike for the debian folks) - xend.log, [2008-04-14 16:23:19 xend.XendDomainInfo 14992] DEBUG (XendDomainInfo:200) XendDomainInfo.create(['vm', ['name', 'xmb'], ['memory', '256'], ['on_reboot', 'restart'], ['on_crash', 'restart'], ['vcpus', 1], ['image', ['linux', ['kernel', '/data/xmb/vmlinuz'], ['ramdisk', '/data/xmb/initrd'], ['root', '/dev/hda1'], ['args', 'init=/bin/sh']]], ['device', ['vbd', ['uname', 'file:/data/xmb/xmb.ext3'], ['dev', 'hda1'], ['mode', 'w']]], ['device', ['vbd', ['uname', 'file:/data/xmb/xmb.swap'], ['dev', 'hda2'], ['mode', 'w']]]]) [2008-04-14 16:23:19 xend.XendDomainInfo 14992] DEBUG (XendDomainInfo:306) parseConfig: config is ['vm', ['name', 'xmb'], ['memory', '256'], ['on_reboot', 'restart'], ['on_crash', 'restart'], ['vcpus', 1], ['image', ['linux', ['kernel', '/data/xmb/vmlinuz'], ['ramdisk', '/data/xmb/initrd'], ['root', '/dev/hda1'], ['args', 'init=/bin/sh']]], ['device', ['vbd', ['uname', 'file:/data/xmb/xmb.ext3'], ['dev', 'hda1'], ['mode', 'w']]], ['device', ['vbd', ['uname', 'file:/data/xmb/xmb.swap'], ['dev', 'hda2'], ['mode', 'w']]]] [2008-04-14 16:23:19 xend.XendDomainInfo 14992] DEBUG (XendDomainInfo:411) parseConfig: result is {'shadow_memory': None, 'start_time': None, 'uuid': None, 'on_crash': 'restart', 'on_reboot': 'restart', 'localtime': None, 'image': ['linux', ['kernel', '/data/xmb/vmlinuz'], ['ramdisk', '/data/xmb/initrd'], ['root', '/dev/hda1'], ['args', 'init=/bin/sh']], 'on_poweroff': None, 'bootloader_args': None, 'cpus': None, 'name': 'xmb', 'backend': [], 'vcpus': 1, 'cpu_weight': None, 'features': None, 'vcpu_avail': None, 'memory': 256, 'device': [('vbd', ['vbd', ['uname', 'file:/data/xmb/xmb.ext3'], ['dev', 'hda1'], ['mode', 'w']]), ('vbd', ['vbd', ['uname', 'file:/data/xmb/xmb.swap'], ['dev', 'hda2'], ['mode', 'w']])], 'bootloader': None, 'cpu': None, 'maxmem': None} [2008-04-14 16:23:19 xend.XendDomainInfo 14992] DEBUG (XendDomainInfo:1349) XendDomainInfo.construct: None [2008-04-14 16:23:19 xend 14992] DEBUG (balloon:127) Balloon: 487248 KiB free; need 2048; done. [2008-04-14 16:23:19 xend.XendDomainInfo 14992] DEBUG (XendDomainInfo:1397) XendDomainInfo.initDomain: 51 1.0 [2008-04-14 16:23:19 xend.XendDomainInfo 14992] DEBUG (XendDomainInfo:1436) _initDomain:shadow_memory=0x0, maxmem=0x100, memory=0x100. [2008-04-14 16:23:19 xend 14992] DEBUG (balloon:127) Balloon: 487248 KiB free; need 262144; done. [2008-04-14 16:23:19 xend 14992] INFO (image:136) buildDomain os=linux dom=51 vcpus=1 [2008-04-14 16:23:19 xend 14992] DEBUG (image:201) domid = 51 [2008-04-14 16:23:19 xend 14992] DEBUG (image:202) memsize = 256 [2008-04-14 16:23:19 xend 14992] DEBUG (image:203) image = /data/xmb/vmlinuz [2008-04-14 16:23:19 xend 14992] DEBUG (image:204) store_evtchn = 1 [2008-04-14 16:23:19 xend 14992] DEBUG (image:205) console_evtchn = 2 [2008-04-14 16:23:19 xend 14992] DEBUG (image:206) cmdline = root=/dev/hda1 init=/bin/sh [2008-04-14 16:23:19 xend 14992] DEBUG (image:207) ramdisk = /data/xmb/initrd [2008-04-14 16:23:19 xend 14992] DEBUG (image:208) vcpus = 1 [2008-04-14 16:23:19 xend 14992] DEBUG (image:209) features = [2008-04-14 16:23:20 xend 14992] DEBUG (blkif:24) exception looking up device number for hda1: [Errno 2] No such file or directory: '/dev/hda1' [2008-04-14 16:23:20 xend 14992] DEBUG (DevController:110) DevController: writing {'virtual-device': '769', 'device-type': 'disk', 'protocol': 'x86_32-abi', 'backend-id': '0', 'state': '1', 'backend': '/local/domain/0/backend/vbd/51/769'} to /local/domain/51/device/vbd/769. [2008-04-14 16:23:20 xend 14992] DEBUG (DevController:112) DevController: writing {'domain': 'xmb', 'frontend': '/local/domain/51/device/vbd/769', 'dev': 'hda1', 'state': '1', 'params': '/data/xmb/xmb.ext3', 'mode': 'w', 'online': '1', 'frontend-id': '51', 'type': 'file'} to /local/domain/0/backend/vbd/51/769. [2008-04-14 16:23:20 xend 14992] DEBUG (blkif:24) exception looking up device number for hda2: [Errno 2] No such file or directory: '/dev/hda2' [2008-04-14 16:23:20 xend 14992] DEBUG (DevController:110) DevController: writing {'virtual-device': '770', 'device-type': 'disk', 'protocol': 'x86_32-abi', 'backend-id': '0', 'state': '1', 'backend': '/local/domain/0/backend/vbd/51/770'} to /local/domain/51/device/vbd/770. [2008-04-14 16:23:20 xend 14992] DEBUG (DevController:112) DevController: writing {'domain': 'xmb', 'frontend': '/local/domain/51/device/vbd/770', 'dev': 'hda2', 'state': '1', 'params': '/data/xmb/xmb.swap', 'mode': 'w', 'online': '1', 'frontend-id': '51', 'type': 'file'} to /local/domain/0/backend/vbd/51/770. [2008-04-14 16:23:20 xend.XendDomainInfo 14992] DEBUG (XendDomainInfo:756) Storing VM details: {'shadow_memory': '0', 'uuid': '196487de-140f-ef22-4b77-131313b013e8', 'on_reboot': 'restart', 'start_time': '1208183000.15', 'on_poweroff': 'destroy', 'name': 'xmb', 'xend/restart_count': '0', 'vcpus': '1', 'vcpu_avail': '1', 'memory': '256', 'on_crash': 'restart', 'image': "(linux (kernel /data/xmb/vmlinuz) (ramdisk /data/xmb/initrd) (root /dev/hda1) (args 'init=/bin/sh'))", 'maxmem': '256'} [2008-04-14 16:23:20 xend.XendDomainInfo 14992] DEBUG (XendDomainInfo:791) Storing domain details: {'console/ring-ref': '145356', 'console/port': '2', 'name': 'xmb', 'console/limit': '1048576', 'vm': '/vm/196487de-140f-ef22-4b77-131313b013e8', 'domid': '51', 'cpu/0/availability': 'online', 'memory/target': '262144', 'store/ring-ref': '145357', 'store/port': '1'} [2008-04-14 16:23:20 xend.XendDomainInfo 14992] DEBUG (XendDomainInfo:988) XendDomainInfo.handleShutdownWatch [2008-04-14 16:23:20 xend 14992] DEBUG (DevController:143) Waiting for devices vif. [2008-04-14 16:23:20 xend 14992] DEBUG (DevController:143) Waiting for devices usb. [2008-04-14 16:23:20 xend 14992] DEBUG (DevController:143) Waiting for devices vbd. [2008-04-14 16:23:20 xend 14992] DEBUG (DevController:149) Waiting for 769. [2008-04-14 16:23:20 xend 14992] DEBUG (DevController:476) hotplugStatusCallback /local/domain/0/backend/vbd/51/769/hotplug-status. [2008-04-14 16:25:00 xend.XendDomainInfo 14992] DEBUG (XendDomainInfo:1557) XendDomainInfo.destroy: domid=51 [2008-04-14 16:25:00 xend.XendDomainInfo 14992] DEBUG (XendDomainInfo:1566) XendDomainInfo.destroyDomain(51) Note, someone reported the bug on RHEL5 x86_64; I guess I shouldn't add a command as a CentOS user (not mentioning I doubt I could reproduce the bug), https://bugzilla.redhat.com/show_bug.cgi?id=408901 Anthing I could do to dig some more ? How to fix this ? I can't play around so much on this server, although I already restarted udev and haldaemon, no changes. (I might reboot it some day but the problem may disapear then, after a fresh reboot). Thanks -- Pierre-Philipp Braun

1 3

full virtualisation on centos5.1 with a F7 guest
by Eric Doutreleau 14 Apr '08

14 Apr '08

Hi I m trying to install a full virtualized guest on my dell poweredge 1950 with centos 5.1 64 bits. I just launched the following command virt-install -n elaphe -r 4096 -f /var/lib/xen/images/elaphe -s 40 -b vlanbr15 --hvm Would you like to enable graphics support? (yes or no) yes What is the virtual CD image, CD device or install location? /var/lib/xen/F-7-i386-DVD.iso Starting install... Creating storage file... 100% |=========================| 40 GB 00:00 Creating domain... 0 B 00:00 VNC Viewer Free Edition 4.1.2 for X - built Mar 14 2007 23:13:57 Copyright (C) 2002-2005 RealVNC Ltd. See http://www.realvnc.com for information on VNC. Mon Apr 7 18:15:36 2008 CConn: connected to host localhost port 5900 CConnection: Server supports RFB protocol version 3.3 CConnection: Using RFB protocol version 3.3 TXImage: Using default colormap and visual, TrueColor, depth 24. CConn: Using pixel format depth 6 (8bpp) rgb222 CConn: Using ZRLE encoding CConn: Throughput 10000 kbit/s - changing to hextile encoding CConn: Throughput 10000 kbit/s - changing to full colour CConn: Using pixel format depth 24 (32bpp) little-endian rgb888 CConn: Using hextile encoding i got a black vnc screen and nothing happened on the server i can read in the file qemu-dm.10057.log domid: 32 qemu: the number of cpus is 1 Watching /local/domain/32/logdirty/next-active qemu_map_cache_init nr_buckets = 10000 shared page at pfn effff buffered io page at pfn efffd xs_read(/vm/02d7a474-7207-08f0-2fa3-7addaeda7552/rtc/timeoffset): read error xs_read(): vncpasswd get error. /vm/02d7a474-7207-08f0-2fa3-7addaeda7552/vncpasswd. char device redirected to /dev/pts/3 I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0 Triggered log-dirty buffer switch and in the xend.log [2008-04-07 18:15:20 xend.XendDomainInfo 8505] DEBUG (XendDomainInfo:1557) XendDomainInfo.destroy: domid=31 [2008-04-07 18:15:20 xend.XendDomainInfo 8505] DEBUG (XendDomainInfo:1566) XendDomainInfo.destroyDomain(31) [2008-04-07 18:15:35 xend.XendDomainInfo 8505] DEBUG (XendDomainInfo:200) XendDomainInfo.create(['vm', ['name', 'elaphe'], ['memory', '4096'], ['maxmem', '4096'], ['vcpus', '1'], ['uuid', '02d7a474-7207-08f0-2fa3-7addaeda7552'], ['on_poweroff', 'destroy'], ['on_reboot', 'destroy'], ['on_crash', 'destroy'], ['image', ['hvm', ['kernel', '/usr/lib/xen/boot/hvmloader'], ['device_model', '/usr/lib64/xen/bin/qemu-dm'], ['vcpus', '1'], ['boot', 'd'], ['acpi', '1'], ['apic', '1'], ['pae', '1'], ['serial', 'pty'], ['vnc', '1'], ['vncunused', '1']]], ['device', ['vbd', ['dev', 'hda:disk'], ['uname', 'file:/var/lib/xen/images/elaphe'], ['mode', 'w']]], ['device', ['vbd', ['dev', 'hdc:cdrom'], ['uname', 'file:/var/lib/xen/F-7-i386-DVD.iso'], ['mode', 'r']]], ['device', ['vif', ['mac', '00:16:3e:36:a6:dd'], ['bridge', 'vlanbr15'], ['type', 'ioemu']]]]) [2008-04-07 18:15:35 xend.XendDomainInfo 8505] DEBUG (XendDomainInfo:306) parseConfig: config is ['vm', ['name', 'elaphe'], ['memory', '4096'], ['maxmem', '4096'], ['vcpus', '1'], ['uuid', '02d7a474-7207-08f0-2fa3-7addaeda7552'], ['on_poweroff', 'destroy'], ['on_reboot', 'destroy'], ['on_crash', 'destroy'], ['image', ['hvm', ['kernel', '/usr/lib/xen/boot/hvmloader'], ['device_model', '/usr/lib64/xen/bin/qemu-dm'], ['vcpus', '1'], ['boot', 'd'], ['acpi', '1'], ['apic', '1'], ['pae', '1'], ['serial', 'pty'], ['vnc', '1'], ['vncunused', '1']]], ['device', ['vbd', ['dev', 'hda:disk'], ['uname', 'file:/var/lib/xen/images/elaphe'], ['mode', 'w']]], ['device', ['vbd', ['dev', 'hdc:cdrom'], ['uname', 'file:/var/lib/xen/F-7-i386-DVD.iso'], ['mode', 'r']]], ['device', ['vif', ['mac', '00:16:3e:36:a6:dd'], ['bridge', 'vlanbr15'], ['type', 'ioemu']]]] [2008-04-07 18:15:35 xend.XendDomainInfo 8505] DEBUG (XendDomainInfo:411) parseConfig: result is {'shadow_memory': None, 'start_time': None, 'uuid': '02d7a474-7207-08f0-2fa3-7addaeda7552', 'on_crash': 'destroy', 'on_reboot': 'destroy', 'localtime': None, 'image': ['hvm', ['kernel', '/usr/lib/xen/boot/hvmloader'], ['device_model', '/usr/lib64/xen/bin/qemu-dm'], ['vcpus', '1'], ['boot', 'd'], ['acpi', '1'], ['apic', '1'], ['pae', '1'], ['serial', 'pty'], ['vnc', '1'], ['vncunused', '1']], 'on_poweroff': 'destroy', 'bootloader_args': None, 'cpus': None, 'name': 'elaphe', 'backend': [], 'vcpus': 1, 'cpu_weight': None, 'features': None, 'vcpu_avail': None, 'memory': 4096, 'device': [('vbd', ['vbd', ['dev', 'hda:disk'], ['uname', 'file:/var/lib/xen/images/elaphe'], ['mode', 'w']]), ('vbd', ['vbd', ['dev', 'hdc:cdrom'], ['uname', 'file:/var/lib/xen/F-7-i386-DVD.iso'], ['mode', 'r']]), ('vif', ['vif', ['mac', '00:16:3e:36:a6:dd'], ['bridge', 'vlanbr15'], ['type', 'ioemu']])], 'bootloader': None, 'cpu': None, 'maxmem': 4096} [2008-04-07 18:15:35 xend.XendDomainInfo 8505] DEBUG (XendDomainInfo:1349) XendDomainInfo.construct: None [2008-04-07 18:15:35 xend 8505] DEBUG (balloon:127) Balloon: 7724732 KiB free; need 2048; done. [2008-04-07 18:15:35 xend.XendDomainInfo 8505] DEBUG (XendDomainInfo:1397) XendDomainInfo.initDomain: 32 1.0 [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: boot, val: d [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: fda, val: None [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: fdb, val: None [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: soundhw, val: None [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: localtime, val: None [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: serial, val: pty [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: std-vga, val: None [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: isa, val: None [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: vcpus, val: 1 [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: acpi, val: 1 [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: usb, val: None [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: usbdevice, val: None [2008-04-07 18:15:35 xend 8505] DEBUG (image:315) args: k, val: None [2008-04-07 18:15:35 xend.XendDomainInfo 8505] DEBUG (XendDomainInfo:1436) _initDomain:shadow_memory=0x0, maxmem=0x1000, memory=0x1000. [2008-04-07 18:15:35 xend 8505] DEBUG (balloon:127) Balloon: 7723696 KiB free; need 4236288; done. [2008-04-07 18:15:35 xend 8505] INFO (image:136) buildDomain os=None dom=32 vcpus=1 [2008-04-07 18:15:35 xend 8505] DEBUG (image:268) domid = 32 [2008-04-07 18:15:35 xend 8505] DEBUG (image:269) image = /usr/lib/xen/boot/hvmloader [2008-04-07 18:15:35 xend 8505] DEBUG (image:270) store_evtchn = 2 [2008-04-07 18:15:35 xend 8505] DEBUG (image:271) memsize = 4096 [2008-04-07 18:15:35 xend 8505] DEBUG (image:272) vcpus = 1 [2008-04-07 18:15:35 xend 8505] DEBUG (image:273) pae = 1 [2008-04-07 18:15:35 xend 8505] DEBUG (image:274) acpi = 1 [2008-04-07 18:15:35 xend 8505] DEBUG (image:275) apic = 1 [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:110) DevController: writing {'backend-id': '0', 'virtual-device': '768', 'device-type': 'disk', 'state': '1', 'backend': '/local/domain/0/backend/vbd/32/768'} to /local/domain/32/device/vbd/768. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:112) DevController: writing {'domain': 'elaphe', 'frontend': '/local/domain/32/device/vbd/768', 'dev': 'hda', 'state': '1', 'params': '/var/lib/xen/images/elaphe', 'mode': 'w', 'online': '1', 'frontend-id': '32', 'type': 'file'} to /local/domain/0/backend/vbd/32/768. [2008-04-07 18:15:35 xend 8505] DEBUG (blkif:24) exception looking up device number for hdc: [Errno 2] No such file or directory: '/dev/hdc' [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:110) DevController: writing {'backend-id': '0', 'virtual-device': '5632', 'device-type': 'cdrom', 'state': '1', 'backend': '/local/domain/0/backend/vbd/32/5632'} to /local/domain/32/device/vbd/5632. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:112) DevController: writing {'domain': 'elaphe', 'frontend': '/local/domain/32/device/vbd/5632', 'dev': 'hdc', 'state': '1', 'params': '/var/lib/xen/F-7-i386-DVD.iso', 'mode': 'r', 'online': '1', 'frontend-id': '32', 'type': 'file'} to /local/domain/0/backend/vbd/32/5632. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:110) DevController: writing {'state': '1', 'backend-id': '0', 'backend': '/local/domain/0/backend/vif/32/0'} to /local/domain/32/device/vif/0. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:112) DevController: writing {'bridge': 'vlanbr15', 'domain': 'elaphe', 'handle': '0', 'script': '/etc/xen/scripts/vif-bridge', 'state': '1', 'frontend': '/local/domain/32/device/vif/0', 'mac': '00:16:3e:36:a6:dd', 'online': '1', 'frontend-id': '32', 'type': 'ioemu'} to /local/domain/0/backend/vif/32/0. [2008-04-07 18:15:35 xend 8505] INFO (image:407) spawning device models: /usr/lib64/xen/bin/qemu-dm ['/usr/lib64/xen/bin/qemu-dm', '-d', '32', '-m', '4096', '-boot', 'd', '-serial', 'pty', '-vcpus', '1', '-acpi', '-domain-name', 'elaphe', '-net', 'nic,vlan=1,macaddr=00:16:3e:36:a6:dd,model=rtl8139', '-net', 'tap,vlan=1,bridge=vlanbr15', '-vncunused', '-vnclisten', '127.0.0.1'] [2008-04-07 18:15:35 xend 8505] INFO (image:409) device model pid: 10057 [2008-04-07 18:15:35 xend.XendDomainInfo 8505] DEBUG (XendDomainInfo:756) Storing VM details: {'shadow_memory': '33', 'uuid': '02d7a474-7207-08f0-2fa3-7addaeda7552', 'on_reboot': 'destroy', 'start_time': '1207584935.44', 'on_poweroff': 'destroy', 'name': 'elaphe', 'xend/restart_count': '0', 'vcpus': '1', 'vcpu_avail': '1', 'memory': '4096', 'on_crash': 'destroy', 'image': '(hvm (kernel /usr/lib/xen/boot/hvmloader) (device_model /usr/lib64/xen/bin/qemu-dm) (vcpus 1) (boot d) (acpi 1) (apic 1) (pae 1) (serial pty) (vnc 1) (vncunused 1))', 'maxmem': '4096'} [2008-04-07 18:15:35 xend.XendDomainInfo 8505] DEBUG (XendDomainInfo:791) Storing domain details: {'console/port': '3', 'name': 'elaphe', 'console/limit': '1048576', 'vm': '/vm/02d7a474-7207-08f0-2fa3-7addaeda7552', 'domid': '32', 'cpu/0/availability': 'online', 'memory/target': '4194304', 'store/ring-ref': '983038', 'store/port': '2'} [2008-04-07 18:15:35 xend.XendDomainInfo 8505] DEBUG (XendDomainInfo:988) XendDomainInfo.handleShutdownWatch [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:143) Waiting for devices vif. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:149) Waiting for 0. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:476) hotplugStatusCallback /local/domain/0/backend/vif/32/0/hotplug-status. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:476) hotplugStatusCallback /local/domain/0/backend/vif/32/0/hotplug-status. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:490) hotplugStatusCallback 1. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:143) Waiting for devices usb. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:143) Waiting for devices vbd. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:149) Waiting for 768. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:476) hotplugStatusCallback /local/domain/0/backend/vbd/32/768/hotplug-status. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:490) hotplugStatusCallback 1. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:149) Waiting for 5632. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:476) hotplugStatusCallback /local/domain/0/backend/vbd/32/5632/hotplug-status. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:490) hotplugStatusCallback 1. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:143) Waiting for devices irq. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:143) Waiting for devices vkbd. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:143) Waiting for devices vfb. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:143) Waiting for devices pci. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:143) Waiting for devices ioports. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:143) Waiting for devices tap. [2008-04-07 18:15:35 xend 8505] DEBUG (DevController:143) Waiting for devices vtpm. [2008-04-07 18:15:35 xend 8505] INFO (XendDomain:370) Domain elaphe (32) unpaused. [root@athenes <mailto:root@athenes> xen]# the dom0 seems stuck i can't attach the console does someone know how to solve this problem?

1 0

Xen 3.2.0 available in any repository?
by Steve Finkelstein 14 Apr '08

14 Apr '08

Hi folks, Is Xen 3.2.0 available on any CentOS repository or perhaps third party repository? Will using this package require compiling from source? Thanks for your help. /sf

2 1

Convirt + CentOS 5
by Alan Murrell 14 Apr '08

14 Apr '08

Hi There, I am currently running CentOS 5.1 with the RPMs that come with the "Virtualization" package and using the virt-manager gui. I really like the look of "convirt" (formerly "xenman") and was thinking of doing the following: - Compile the SRPMs for Xen 3.2 from source and install over top of the existing Xen (I have an x86_64 machine) - Use the latest version of Convirt I was wondering if anyone has done either of the above, and if you had run into any problems? In other words: 1.) What sort of issues (if any) did you run in to when installing Xen 3.2 over top of the the 3.0.3 that comes with CentOS 5.1? 2.) Are you running in to issues using Convirt (I had heard about some issues some users had had trying to using it under CentOS5, but wanted to see of they still persist) TIA for your advice. -Alan

3 2

virbr0 and libvirtd
by Joseph L. Casale 14 Apr '08

14 Apr '08

I set libvirtd off to disable virbr0 and set my vif's to point to eth0 as their bridge and this is working well for local connectivity. Are there any ramifications to doing this the way I did? Thanks! jlc

2 1

Installing Xen 3.2 from Xen.org under CentOS 5.1 x64
by Joseph L. Casale 11 Apr '08

11 Apr '08

What is the best procedure for doing this on a minimal install of CentOS without a gui? Can I install all the dependencies through yum that a `#yum install xen kernel-xen xen-libs` would bring in, then simply install the xen-3.2.0-0xs.centos5.i386.rpm and xen-libs-3.2.0-0xs.centos5.i386.rpm? Thanks! jlc

3 3

xenbr0 isn't created anymore
by Kai Schaetzl 02 Apr '08

02 Apr '08

Somehow I managed to disable the creation of xenbr0 on boot-up of the host system. CentOS 5 with standard CentOS Xen. I changed all Xen VMs to use xenbr0 instead of virbr0 and disabled virtlibd. Works fine. But when I later restarted the machine I found that all networking for guests had gone. On inspection there's no xenbr0 created anymore. I can get it up by stopping network (or eth0) and then running /etc/xen/scripts/network-bridge start xend-config.sxp still has (network-script network-bridge), logging shows no problems. It seems that the network-bridge script simply doesn't run, but why? I can't see any init script or so that might run it, so I assume it's xend doing that, but there's no error in any log. Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com

3 30

xm new and plain text config files
by Kai Schaetzl 02 Apr '08

02 Apr '08

After installing PyXML I can now use xen new, but I see it doesn't work like I hoped it would work. It can't read the config files that were created by virt-manager. There is an option -F for using "sxp" config files and I was assuming that might be the correct one, but it's not working either (it always says the file is not there, although it is). Is there a conversion tool or are we supposed to convert manually? Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com

1 0

Re: CentOS-virt Digest, Vol 7, Issue 22
by Hristo Benev 30 Mar '08

30 Mar '08

Already reported.... http://bugs.centos.org/view.php?id=2516 >Subject: RE: [CentOS-virt] xenbr0 isn't created anymore >To: <centos-virt(a)centos.org> >Message-ID: > <E2BB8074E5500C42984D980D4BD78EF9022A704E(a)MFG-NYC-EXCH2.mfg.prv> >Content-Type: text/plain; charset="us-ascii" > >Kai Schaetzl wrote: >> >> Somehow I managed to disable the creation of xenbr0 on boot-up of the host >> system. CentOS 5 with standard CentOS Xen. >> I changed all Xen VMs to use xenbr0 instead of virbr0 and disabled >> virtlibd. Works fine. But when I later restarted the machine I found that >> all networking for guests had gone. On inspection there's no xenbr0 >> created anymore. I can get it up by stopping network (or eth0) and then >> running /etc/xen/scripts/network-bridge start >> xend-config.sxp still has (network-script network-bridge), logging shows >> no problems. It seems that the network-bridge script simply doesn't run, >> but why? I can't see any init script or so that might run it, so I assume >> it's xend doing that, but there's no error in any log. > >Kai, > >Snooping around I found this in /etc/xen/qemu-ifup: > ># ># Old style bridge setup with netloop, used to have a bridge name ># of xenbrX, enslaving pethX and vif0.X, and then configuring ># eth0. ># ># New style bridge setup does not use netloop, so the bridge name ># is ethX and the physical device is enslaved pethX ># ># So if... ># ># - User asks for xenbrX ># - AND xenbrX doesn't exist ># - AND there is a ethX device which is a bridge ># ># ..then we translate xenbrX to ethX ># ># This lets old config files work without modification > >So it turns out Xen networking changed in current releases and they never >updated their Wiki. > >Now I am not sure how the vif0.X and vethX interfaces fit into the >picture here... Maybe these are no longer used? > >vifX.Y interfaces are still used though for linking domU interfaces >with the physical interface. > > >-Ross > >______________________________________________________________________ >This e-mail, and any attachments thereto, is intended only for use by >the addressee(s) named herein and may contain legally privileged >and/or confidential information. If you are not the intended recipient >of this e-mail, you are hereby notified that any dissemination, >distribution or copying of this e-mail, and any attachments thereto, >is strictly prohibited. If you have received this e-mail in error, >please immediately notify the sender and permanently delete the >original and any copy or printout thereof. > > >

3 2

Migration Problem
by Brett Worth 29 Mar '08

29 Mar '08

Hi all! I've been experimenting with Xen on CentOS 5 and RHAS 5 for a while now with mixed success I thought I'd describe my latest challenge. I'll describe this from memory since all the equipment is at work and not contactable from here. I think I've described this config to the list before but here it is again: I have 2 x HP DL585 servers each with 4 Dual core Opterons (non-vmx) and 16GB RAM configured as Xen servers. These run CentOS 5.1 with the latest updates applied. These system both attach to an iSCSI target which is an HP DL385 running ietd and serving SAN based storage. Everything runs fine if I do no migration. I was having a "soft lockup" problem which has been solved by installing the latest test kernel from redhat. They've adjusted a timer as described in this report (comment 5): https://bugzilla.redhat.com/show_bug.cgi?id=250994 Anyway things are pretty stable now but... If I do a series of migrations, live or not, from one server to the other eventually I will get the process to fail. This could take up to an hour with the migrations happening every 5 minutes. It can also happen first try. The message in the xend.log file says that it is unable to find the device number for the virtualised storage i.e. sda. In my configuration I have dom0 connecting to the LUNs used by the VMs to the domU's are not doing iSCSI. I'm passing the "/dev/disks/by-path/iscsixxx:sda1" info in via the xen config file. If I mount and unmount the same LUN's filesystem to the dom0 over and over again it works every time so there's no fundamental problem with the iSCSI connection itself. Each server is using 3 gige interfaces: One for normal LAN access, a dedicated network for the iSCSI and a crossover cable between the third gige interfaces on the servers for the migration channel. I have a xentop running on both dom0's and can tell that its failed when the vm appears in the target but the memory used by the vm doesn't start incrementing. The end result is that the VM is hung and has to be destroyed and re-created. The error happens immediately after the failed migration is initiated. I've tried doing a read of the first few blocks of the LUN on the target immediately before initiating the migration which is successful but makes no difference. I realize this is pretty sketchy information but I was wondering if others were seeing similar problems. The ability to do reliable migration is basically the prime motivation for us wanting to do virtualization at all. Otherwise we'd just run the required services on the main machine. Anyway, any help would be appreciated. Brett

1 0

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