QEMU (and librbd) flush the cache on the source before the
destination starts, and the destination does not read any
changeable data before that, so live migration with rbd caching
is safe.
This makes 'virsh migrate' work with rbd and caching without the
--unsafe flag.
Reported-by: Vladimir Bashkirtsev <vladimir@bashkirtsev.com>
Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
virDomainBlockStatsFlags can't collect total_time_ns for read/write/flush
because of key typo when retriveing from qemu cmd result
Signed-off-by: lvroyce <lvroyce@linux.vnet.ibm.com>
Fixed up virsh -V output by removing invalid WITH_PROXY & WITH_ONE
checks, adding several missing checks, and fixing the DTrace check.
Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Reported by Jason Helfman as a build-breaker on FreeBSD.
* src/conf/domain_conf.c (virDomainFSDefParseXML): Use POSIX
spelling.
* src/openvz/openvz_conf.c (openvzReadFSConf): Likewise.
Below patch fixes this coverity report:
/libvirt/src/conf/nwfilter_conf.c:382:
leaked_storage: Variable "varAccess" going out of scope leaks the storage it points to.
Since we are mounting a new /dev in the container, we must
remove any sub-mounts like /dev/shm, /dev/mqueue, etc,
otherwise they'll be recorded in /proc/mounts, but not be
accessible to applications.
Hello,
This is a patch to fix vm's outbound traffic control problem.
Currently, vm's outbound traffic control by libvirt doesn't go well.
This problem was previously discussed at libvir-list ML, however
it seems that there isn't still any answer to the problem.
http://www.redhat.com/archives/libvir-list/2011-August/msg00333.html
I measured Guest(with virtio-net) to Host TCP throughput with the
command "netperf -H".
Here are the outbound QoS parameters and the results.
outbound average rate[kilobytes/s] : Guest to Host throughput[Mbit/s]
======================================================================
1024 (8Mbit/s) : 4.56
2048 (16Mbit/s) : 3.29
4096 (32Mbit/s) : 3.35
8192 (64Mbit/s) : 3.95
16384 (128Mbit/s) : 4.08
32768 (256Mbit/s) : 3.94
65536 (512Mbit/s) : 3.23
The outbound traffic goes down unreasonably and is even not controled.
The cause of this problem is too large mtu value in "tc filter" command run by
libvirt. The command uses burst value to set mtu and the burst is equal to
average rate value if it's not set. This value is too large. For example
if the average rate is set to 1024 kilobytes/s, the mtu value is set to 1024
kilobytes. That's too large compared to the size of network packets.
Here libvirt applies tc ingress filter to Host's vnet(tun) device.
Tc ingress filter is implemented with TBF(Token Buckets Filter) algorithm. TBF
uses mtu value to calculate the amount of token consumed by each packet. With too
large mtu value, the token consumption rate is set too large. This leads to
token starvation and deterioration of TCP throughput.
Then, should we use the default mtu value 2 kilobytes?
The anser is No, because Guest with virtio-net device uses 65536 bytes
as mtu to transmit packets to Host, and the tc filter with the default mtu
value 2k drops packets whose size is larger than 2k. So, the most packets
is droped and again leads to deterioration of TCP throughput.
The appropriate mtu value is 65536 bytes which is equal to the maximum value
of network interface device defined in <linux/netdevice.h>. The value is
not so large that it causes token starvation and not so small that it
drops most packets.
Therefore this patch set the mtu value to 64kb(== 65535 bytes).
Again, here are the outbound QoS parameters and the TCP throughput with
the libvirt patched.
outbound average rate[kilobytes/s] : Guest to Host throughput[Mbit/s]
======================================================================
1024 (8Mbit/s) : 8.22
2048 (16Mbit/s) : 16.42
4096 (32Mbit/s) : 32.93
8192 (64Mbit/s) : 66.85
16384 (128Mbit/s) : 133.88
32768 (256Mbit/s) : 271.01
65536 (512Mbit/s) : 547.32
The outbound traffic conforms to the given limit.
Thank you,
Signed-off-by: Eiichi Tsukata <eiichi.tsukata.xh@hitachi.com>
If the user specified invalid protocol type in a network's SRV record
the error path ended up in freeing uninitialized pointers causing a
daemon crash.
*network_conf.c: virNetworkDNSSrvDefParseXML(): initialize local
variables
VirtualBox doesn't use the common virDomainObj implementation so this
patch adds a separate implementation using the VirtualBox API.
This driver implementation supports all currently defined flags. As
VirtualBox does not support transient guests, managed save images and
autostarting we assume all guests are persistent, don't have a managed
save image and are not autostarted. Filtering for existence of those
properities results in empty list.
mnt_fsname can not be the same, as we check the duplicate pool
sources earlier before, means it can't be the same pool, moreover,
a pool can't be started if it's already active anyway. So no reason
to act as success.
virConnectDomainEventRegisterAny() takes a domain as an argument.
So it should be possible to register the same event (be it
VIR_DOMAIN_EVENT_ID_LIFECYCLE for example) for two different domains.
That is, we need to take domain into account when searching for
duplicate event being already registered.
v2:
- Refactored to use virBuffer
- Refactored to use virXPath wrappers
- Added support for tls-port and password for SPICE
- Added optional flag to disable SPICE password to the URI
- Added support for RDP
- Fixed code reviews
Add a new 'domdisplay' command that provides a URI for VNC, SPICE and
RDP connections. Presently the 'vncdisplay' command provides you with
the port info that QEMU is listening on but there is no counterpart for
SPICE and RDP. Additionally this provides you with the bind address as
specified in the XML, which the existing 'vncdisplay' lacks. For SPICE
connections it supports secure and unsecure channels and optionally
providing the password for the SPICE channel.
Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
Latest patchset enabling libvirt on s390(x) was developed by
Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Thang Pham <thang.pham@us.ibm.com>
Add them to the AUTHORS file.
In order to retrieve some sysinfo data we need to parse /proc/sysinfo and
/proc/cpuinfo.
Signed-off-by: Thang Pham <thang.pham@us.ibm.com>
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
For the s390x architecture the sysfs core_id alone is not unique. As a
result it can happen that libvirt thinks there are less host CPUs available
than really present.
Currently, a logical CPU is equivalent to a core for s390x. We therefore
produce a fake core id from the CPU number.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Minimal CPU "parser" for s390 to avoid compile time warning.
Signed-off-by: Thang Pham <thang.pham@us.ibm.com>
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Adding CPU encoder/decoder for s390 to avoid runtime error messages.
Signed-off-by: Thang Pham <thang.pham@us.ibm.com>
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Starting a KVM guest on s390 fails immediately. This is because
"qemu --help" reports -no-acpi even for the s390(x) architecture but
-no-acpi isn't supported there.
Workaround is to remove QEMU_CAPS_NO_ACPI from the capability set
after the version/capability extraction.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
We used to prefix 'rbd:' to volume names, this is not necessary.
Qemu takes RBD devices in this way, like: qemu -drive rbd:pool/image
When attaching a network disk like RBD to a guest we however do not use this prefix.
Currently you can't map a RBD volume name directly to a domain without removing the prefix.
Signed-off-by: Wido den Hollander <wido@widodh.nl>
If no 'listen' attribute or <listen> element is set in the
guest XML, the default driver configured listen address is
used. There is no way to client applications to determine
what this address is though. When starting the guest, we
should update the live XML to include this default listen
address
Storage is one of the last domains in libvirt where we don't fully
utilize inactive and live XML. Okay, it might be because we don't
have support for that. So implement such support. However, we need
to fallback when talking to old daemon which doesn't support this
new flag called VIR_STORAGE_XML_INACTIVE.
Currently, we share the idea of old & new def with domains. Users can
*-edit an object (domain, pool) which spawns a new internal
representation for them. This is referenced via
{domainObj,poolObj}->newDef [compared to ->def]. However, for pool we
were never overwriting def with newDef. This must be done on
pool-destroy (like we do analogically in domain detroy).
Currently libvirt-lxc checks to see if the destination exists and is a
directory. If it is not a directory then the mount fails. Since
libvirt-lxc can bind mount files on an inode, this patch is needed to
allow us to bind mount files on files. Currently we want to bind mount
on top of /etc/machine-id, and /etc/adjtime
If the destination of the mount point does not exists, it checks if the
src is a directory and then attempts to create a directory, otherwise it
creates an empty file for the destination. The code will then bind mount
over the destination.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Sometimes it is useful to re-bootstrap libvirt without running
through a ./configure invocation immediately. eg if you want
to run ./configure for Mingw32 rather than native.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The vshPrintRaw function is not used on Win32, and neither
is the 'msg' parameter of vshAskReedit. Change the nesting
of #ifdef WIN32 conditionals to address this
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
On both x86_64-w64-mingw32 and i686-w64-mingw32 there were
the following warnings/errors:
CC fstat.lo
../../../gnulib/lib/fstat.c:27:0: warning: "stat" redefined [enabled by default]
In file included from ./sys/stat.h:32:0,
from ../../../gnulib/lib/fstat.c:25:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/sys/stat.h:258:0: note: this is the location of the previous definition
../../../gnulib/lib/fstat.c:28:0: warning: "fstat" redefined [enabled by default]
In file included from ./sys/stat.h:32:0,
from ../../../gnulib/lib/fstat.c:25:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/sys/stat.h:259:0: note: this is the location of the previous definition
CC stat.lo
../../../gnulib/lib/stat.c:32:0: warning: "stat" redefined [enabled by default]
In file included from ./sys/stat.h:32:0,
from ../../../gnulib/lib/stat.c:27:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/sys/stat.h:258:0: note: this is the location of the previous definition
CC stdio-read.lo
../../../gnulib/lib/stdio-read.c:102:1: error: redefinition of 'vscanf'
In file included from ./stdio.h:43:0,
from ../../../gnulib/lib/stdio-read.c:21:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/stdio.h:397:7: note: previous definition of 'vscanf' was here
../../../gnulib/lib/stdio-read.c:108:1: error: redefinition of 'vfscanf'
In file included from ./stdio.h:43:0,
from ../../../gnulib/lib/stdio-read.c:21:
/usr/x86_64-w64-mingw32/sys-root/mingw/include/stdio.h:384:7: note: previous definition of 'vfscanf' was here
make[3]: *** [stdio-read.lo] Error 1
make[3]: Leaving directory `/home/berrange/src/virt/libvirt/build/gnulib/lib'
While on x86_64-w64-mingw32 only there was:
In file included from ../../../gnulib/lib/regex.c:69:0:
../../../gnulib/lib/regcomp.c: In function 'parse_dup_op':
../../../gnulib/lib/regcomp.c:2624:39: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
../../../gnulib/lib/regcomp.c: In function 'mark_opt_subexp':
../../../gnulib/lib/regcomp.c:3859:19: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Some GNULIB headers (eg unistd.h) will often need to include
winsock2.h for various symbols. There is a rule that winsock2.h
must be included before windows.h. This means that any file
which does
#ifdef WIN32
#include <windows.h>
#endif
#include <unistd.h>
is potentially broken. A simple rule is that /all/ includes of
windows.h must be matched with a preceding include of winsock2.h
regardless of whether unistd.h is used currently
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The Mingw32 toolchain is broadly obsoleted by the Mingw64 toolchain.
The latter has been adopted by Fedora 17 and newer. Maintaining a
RPM spec for Mingw32 is a needless burden, so switch to a Mingw64
RPM spec (which provides 32 & 64 bit builds).
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Update the vncdisplay command to use the virXPath wrappers as well as
check if the domain is up rather than using the port set to -1 to mean
the domain is not up.
Signed-off-by: Doug Goldstein <cardoe@cardoe.com>
A sanlock lease can be marked as shared (rather
than exclusive) using SANLK_RES_SHARED flag. This
adds support for that flag and ensures that in auto
disk mode, any shared disks use shared leases. This
also makes any read-only disks be completely
ignored.
These changes remove the need for the option
ignore_readonly_and_shared_disks
so that is removed
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Currently you can configure LXC to bind a host directory to
a guest directory, but not to bind a guest directory to a
guest directory. While the guest container init could do
this itself, allowing it in the libvirt XML means a stricter
SELinux policy can be written
Introduce a new syntax for filesystems to allow use of a RAM
filesystem
<filesystem type='ram'>
<source usage='10' units='MiB'/>
<target dir='/mnt'/>
</filesystem>
The usage units default to KiB to limit consumption of host memory.
* docs/formatdomain.html.in: Document new syntax
* docs/schemas/domaincommon.rng: Add new attributes
* src/conf/domain_conf.c: Parsing/formatting of RAM filesystems
* src/lxc/lxc_container.c: Mounting of RAM filesystems
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The test of ref count is not protected by lock, which is unsafe because
the ref count may have been changed by other threads during the test.
This patch fixes this.
This patch adds a check for the count of processors the user requests
for the guest machine so that invalid values produce a more helpful
error message.
When shutting down libvirtd, the virNetServer shutdown can deadlock
if there are in-flight jobs being handled by virNetServerHandleJob().
virNetServerFree() will acquire the virNetServer lock and call
virThreadPoolFree() to terminate the workers, waiting for the workers
to finish. But in-flight workers will attempt to acquire the
virNetServer lock, resulting in deadlock.
Fix the deadlock by unlocking the virNetServer lock before calling
virThreadPoolFree(). This is safe since the virNetServerPtr object
is ref-counted and only decrementing the ref count needs to be
protected. Additionally, there is no need to re-acquire the lock
after virThreadPoolFree() completes as all the workers have
terminated.
