Update: I am able to edit the XML in "dwj-hfax-dev" such that libvirtd no longer crashes, and edit the XML for "dwj-lnx-dev" such that it will crash.
The presents of "<seclabel type='none'/>" near the bottom causes libvirtd to crash.
I do not recall ever manually adding that to my domain.The presents of "<seclabel type='none'/>" near the bottom causes libvirtd to crash.
On Fri, Jul 12, 2013 at 11:44 AM, Dennis Jenkins <dennis.jenkins.75@xxxxxxxxx> wrote:
The debug log ends with this:
2013-07-12 16:43:31.740+0000: 21365: debug : virCgroupMakeGroup:708 : Make group /machine/dwj-hfax-dev.libvirt-lxc
2013-07-12 16:43:31.740+0000: 21365: debug : virCgroupMakeGroup:729 : Make controller /sys/fs/cgroup/cpu/machine/dwj-hfax-dev.libvirt-lxc/
2013-07-12 16:43:31.740+0000: 21365: debug : virCgroupMakeGroup:729 : Make controller /sys/fs/cgroup/cpuacct/machine/dwj-hfax-dev.libvirt-lxc/
2013-07-12 16:43:31.740+0000: 21365: debug : virCgroupMakeGroup:729 : Make controller /sys/fs/cgroup/cpuset/machine/dwj-hfax-dev.libvirt-lxc/
2013-07-12 16:43:31.740+0000: 21365: debug : virCgroupMakeGroup:729 : Make controller /sys/fs/cgroup/memory/machine/dwj-hfax-dev.libvirt-lxc/
2013-07-12 16:43:31.740+0000: 21365: debug : virCgroupMakeGroup:729 : Make controller /sys/fs/cgroup/devices/machine/dwj-hfax-dev.libvirt-lxc/
2013-07-12 16:43:31.740+0000: 21365: debug : virCgroupMakeGroup:729 : Make controller /sys/fs/cgroup/freezer/machine/dwj-hfax-dev.libvirt-lxc/
2013-07-12 16:43:31.740+0000: 21365: debug : virCgroupMakeGroup:729 : Make controller /sys/fs/cgroup/blkio/machine/dwj-hfax-dev.libvirt-lxc/
2013-07-12 16:43:31.740+0000: 21365: debug : virCgroupMakeGroup:715 : Skipping unmounted controller net_cls
2013-07-12 16:43:31.740+0000: 21365: debug : virCgroupMakeGroup:729 : Make controller /sys/fs/cgroup/perf_event/machine/dwj-hfax-dev.libvirt-lxc/
2013-07-12 16:43:31.740+0000: 21365: debug : virCgroupMakeGroup:779 : Done making controllers for group
2013-07-12 16:43:31.740+0000: 21365: debug : virFileMakePathHelper:1995 : path=/var/log/libvirt/lxc mode=0777
2013-07-12 16:43:31.740+0000: 21365: debug : virLXCProcessStart:1096 : Setting current domain def as transient
2013-07-12 16:43:31.741+0000: 21365: debug : virLXCProcessStart:1121 : Preparing host devices
2013-07-12 16:43:31.741+0000: 21365: debug : virLXCProcessStart:1139 : Generating domain security label (if required)
====== end of log =====
Segmentation fault (core dumped)
(gdb) bt
#0 0x00007fe4750c5d76 in __strcmp_sse42 () from /lib64/libc.so.6
#1 0x00007fe47578ad31 in virSecurityManagerGenLabel () from /usr/lib64/libvirt.so.0
#2 0x00007fe46aa92979 in virLXCProcessStart () from /usr/lib64/libvirt/connection-driver/libvirt_driver_lxc.so
#3 0x00007fe46aa9736e in lxcDomainCreateWithFlags () from /usr/lib64/libvirt/connection-driver/libvirt_driver_lxc.so
#4 0x00007fe47569c067 in virDomainCreate () from /usr/lib64/libvirt.so.0
#5 0x00007fe4760d5578 in remoteDispatchDomainCreateHelper ()
#6 0x00007fe4756fcd78 in virNetServerProgramDispatch () from /usr/lib64/libvirt.so.0
#7 0x00007fe4756f7302 in virNetServerProcessMsg () from /usr/lib64/libvirt.so.0
#8 0x00007fe4756f7a93 in virNetServerHandleJob () from /usr/lib64/libvirt.so.0
#9 0x00007fe47560f95e in virThreadPoolWorker () from /usr/lib64/libvirt.so.0
#10 0x00007fe47560efc6 in virThreadHelper () from /usr/lib64/libvirt.so.0
#11 0x00007fe475354da6 in start_thread () from /lib64/libpthread.so.0
#12 0x00007fe47508d99d in clone () from /lib64/libc.so.6
(gdb)
On Fri, Jul 12, 2013 at 11:40 AM, Dennis Jenkins <dennis.jenkins.75@xxxxxxxxx> wrote:
Hello all,
I have two issues:
1) I am unable to start a seemingly correct LXC domain (I cloned it from a working domain).
2) I am able to crash "libvirtd" by attempting to start the cloned domain, but starting the original works just fine.
I humbly submit that item #2 is a bug - the "libvirtd" daemon should never crash due to anything the "libvirt" client throws at it. As for item #1, I'm not sure where I went wrong. A full walk-through is below (ending with a DIFF of the XML from the two domains).
I created by original domain ("dwj-lnx-dev") a long time ago. Today I created the new domain ("dwj-hfax-dev") as follows:
1) Shutdown "dwj-lnx-dev"
2) Clone the root file system: "cd /vm/lxc/; cp -a dwj-lnx-dev dwj-hfax-dev" (2.5GB, ~5 min)
3) "libvirt -c lxc:/// dumpxml dwj-lnx-dev > a.xml"
4) ${EDITOR} a.xml
a) changed MAC address, name, memory, source directory for "/"
5) "libvirt -c lxc:/// define a.xml"
6) Edit "/etc/bind/pri/*" and "/etc/dhcp/dhcpd.conf" on my host.
It does not matter is "dwj-lnx-dev" is running or not. Any attempt to start "dwj-hfax-dev" will crash libvirtd.
In the past I was asked to turn on some debugging and capture a detailed log (https://www.redhat.com/archives/libvirt-users/2013-May/msg00076.html). I will do this soon and post my results as a follow up.
ostara ~ # uname -a
Linux ostara 3.8.13-gentoo #1 SMP PREEMPT Mon Jun 3 17:10:56 CDT 2013 x86_64 Intel(R) Core(TM) i5 CPU 760 @ 2.80GHz GenuineIntel GNU/Linux
ostara ~ # equery l libvirt
* Searching for libvirt ...
[IP-] [ ] app-emulation/libvirt-1.1.0-r1:0
ostara ~ # virsh -c lxc:/// version
Compiled against library: libvirt 1.1.0
Using library: libvirt 1.1.0
Using API: LXC 1.1.0
Running hypervisor: LXC 3.8.13
ostara ~ # /etc/init.d/libvirtd restart
* Caching service dependencies ... [ ok ]
* Stopping libvirtd ...
* Shutting down network(s):
* default [ ok ]
* Starting libvirtd ... [ ok ]
ostara ~ # virsh -c lxc:/// list --all
Id Name State
----------------------------------------------------
- dwj-hfax-dev shut off
- dwj-lnx-dev shut off
- vm1 shut off
ostara ~ # virsh -c lxc:/// start dwj-lnx-dev
Domain dwj-lnx-dev started
ostara ~ # virsh -c lxc:/// list --all
Id Name State
----------------------------------------------------
9441 dwj-lnx-dev running
- dwj-hfax-dev shut off
- vm1 shut off
ostara ~ # virsh -c lxc:/// start dwj-hfax-dev
error: Failed to start domain dwj-hfax-dev
error: End of file while reading data: Input/output error
error: One or more references were leaked after disconnect from the hypervisor
error: Failed to reconnect to the hypervisor
ostara ~ # virsh -c lxc:/// list --all
error: failed to connect to the hypervisor
error: no valid connection
error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Connection refused
ostara ~ # ls -l /var/run/libvirt/libvirt-sock
srwx------ 1 root root 0 Jul 12 11:21 /var/run/libvirt/libvirt-sock
ostara ~ # ps axfw | grep libvirt
9997 pts/2 S+ 0:00 \_ grep --colour=auto libvirt
8446 ? S 0:00 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf
9441 ? Ss 0:00 /usr/libexec/libvirt_lxc --name dwj-lnx-dev --console 19 --security=none --handshake 23 --background --veth veth1
ostara ~ # /etc/init.d/libvirtd restart
* Stopping libvirtd ...
* start-stop-daemon: no matching processes found [ ok ]
* Starting libvirtd ... [ ok ]
ostara ~ # ps axfw | grep libvirt
10130 pts/2 S+ 0:00 \_ grep --colour=auto libvirt
8446 ? S 0:00 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf
9441 ? Ss 0:00 /usr/libexec/libvirt_lxc --name dwj-lnx-dev --console 19 --security=none --handshake 23 --background --veth veth1
10033 ? Sl 0:00 /usr/sbin/libvirtd -d --listen
ostara ~ # virsh -c lxc:/// list --all
Id Name State
----------------------------------------------------
9441 dwj-lnx-dev running
- dwj-hfax-dev shut off
- vm1 shut off
ostara ~ # virsh -c lxc:/// dumpxml dwj-hfax-dev
<domain type='lxc'>
<name>dwj-hfax-dev</name>
<uuid>681410de-7b56-41bd-b38d-3c66ce97e7b3</uuid>
<memory unit='KiB'>4194304</memory>
<currentMemory unit='KiB'>4194304</currentMemory>
<vcpu placement='static'>4</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64'>exe</type>
<init>/sbin/init</init>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/libvirt_lxc</emulator>
<filesystem type='mount' accessmode='passthrough'>
<source dir='/vm/lxc/dwj-hfax-dev'/>
<target dir='/'/>
</filesystem>
<filesystem type='mount' accessmode='passthrough'>
<source dir='/usr/portage'/>
<target dir='/usr/portage'/>
</filesystem>
<filesystem type='mount' accessmode='passthrough'>
<source dir='/usr/src'/>
<target dir='/usr/src'/>
</filesystem>
<filesystem type='mount' accessmode='passthrough'>
<source dir='/home'/>
<target dir='/home'/>
</filesystem>
<interface type='bridge'>
<mac address='82:00:00:00:01:01'/>
<source bridge='br0'/>
<target dev='veth0'/>
</interface>
<console type='pty'>
<target type='lxc' port='0'/>
</console>
</devices>
<seclabel type='none'/>
</domain>
ostara ~ # virsh -c lxc:/// dumpxml dwj-lnx-dev
<domain type='lxc' id='9441'>
<name>dwj-lnx-dev</name>
<uuid>fbcd8c3a-9939-12b4-727d-5d3526bc448f</uuid>
<memory unit='KiB'>500000</memory>
<currentMemory unit='KiB'>500000</currentMemory>
<vcpu placement='static'>2</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64'>exe</type>
<init>/sbin/init</init>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/libexec/libvirt_lxc</emulator>
<filesystem type='mount' accessmode='passthrough'>
<source dir='/vm/lxc/dwj-lnx-dev'/>
<target dir='/'/>
</filesystem>
<filesystem type='mount' accessmode='passthrough'>
<source dir='/usr/portage'/>
<target dir='/usr/portage'/>
</filesystem>
<filesystem type='mount' accessmode='passthrough'>
<source dir='/usr/src'/>
<target dir='/usr/src'/>
</filesystem>
<filesystem type='mount' accessmode='passthrough'>
<source dir='/home'/>
<target dir='/home'/>
</filesystem>
<interface type='bridge'>
<mac address='82:00:00:00:01:00'/>
<source bridge='br0'/>
<target dev='veth0'/>
</interface>
<console type='pty' tty='/dev/pts/3'>
<source path='/dev/pts/3'/>
<target type='lxc' port='0'/>
<alias name='console0'/>
</console>
</devices>
<seclabel type='none'/>
</domain>
ostara ~ # virsh -c lxc:/// dumpxml dwj-lnx-dev > lnx.xml
ostara ~ # virsh -c lxc:/// dumpxml dwj-hfax-dev > hfax.xml
ostara ~ # diff lnx.xml hfax.xml
1,6c1,6
< <domain type='lxc' id='9441'>
< <name>dwj-lnx-dev</name>
< <uuid>fbcd8c3a-9939-12b4-727d-5d3526bc448f</uuid>
< <memory unit='KiB'>500000</memory>
< <currentMemory unit='KiB'>500000</currentMemory>
< <vcpu placement='static'>2</vcpu>
---
> <domain type='lxc'>
> <name>dwj-hfax-dev</name>
> <uuid>681410de-7b56-41bd-b38d-3c66ce97e7b3</uuid>
> <memory unit='KiB'>4194304</memory>
> <currentMemory unit='KiB'>4194304</currentMemory>
> <vcpu placement='static'>4</vcpu>
21c21
< <source dir='/vm/lxc/dwj-lnx-dev'/>
---
> <source dir='/vm/lxc/dwj-hfax-dev'/>
37c37
< <mac address='82:00:00:00:01:00'/>
---
> <mac address='82:00:00:00:01:01'/>
41,42c41
< <console type='pty' tty='/dev/pts/3'>
< <source path='/dev/pts/3'/>
---
> <console type='pty'>
44d42
< <alias name='console0'/>
(After reseting everything, and attempting to boot hfax with dev offline, libvirtd still crashes)
ostara ~ # virsh -c lxc:/// list --all
Id Name State
----------------------------------------------------
- dwj-hfax-dev shut off
- dwj-lnx-dev shut off
- vm1 shut off
ostara ~ # virsh -c lxc:/// start dwj-hfax-dev
error: Failed to start domain dwj-hfax-dev
error: End of file while reading data: Input/output error
error: One or more references were leaked after disconnect from the hypervisor
error: Failed to reconnect to the hypervisor
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