[libvirt] [PATCH] Fix compile error for stable 1.2.9
by Yang hongyang
Seems a backport miss. An extra member is passed to struct
virLXCBasicMountInfo.
Signed-off-by: Yang hongyang <hongyang.yang(a)easystack.cn>
---
src/lxc/lxc_container.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/src/lxc/lxc_container.c b/src/lxc/lxc_container.c
index 28dabec..1c65fa9 100644
--- a/src/lxc/lxc_container.c
+++ b/src/lxc/lxc_container.c
@@ -760,7 +760,7 @@ typedef struct {
static const virLXCBasicMountInfo lxcBasicMounts[] = {
{ "proc", "/proc", "proc", MS_NOSUID|MS_NOEXEC|MS_NODEV, false, false },
- { "/proc/sys", "/proc/sys", NULL, MS_BIND|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, false, false, false },
+ { "/proc/sys", "/proc/sys", NULL, MS_BIND|MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, false, false },
{ "sysfs", "/sys", "sysfs", MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, false, false },
{ "securityfs", "/sys/kernel/security", "securityfs", MS_NOSUID|MS_NOEXEC|MS_NODEV|MS_RDONLY, true, true },
#if WITH_SELINUX
--
1.7.1
1 year
[libvirt] Supporting vhost-net and macvtap in libvirt for QEMU
by Anthony Liguori
Disclaimer: I am neither an SR-IOV nor a vhost-net expert, but I've CC'd
people that are who can throw tomatoes at me for getting bits wrong :-)
I wanted to start a discussion about supporting vhost-net in libvirt.
vhost-net has not yet been merged into qemu but I expect it will be soon
so it's a good time to start this discussion.
There are two modes worth supporting for vhost-net in libvirt. The
first mode is where vhost-net backs to a tun/tap device. This is
behaves in very much the same way that -net tap behaves in qemu today.
Basically, the difference is that the virtio backend is in the kernel
instead of in qemu so there should be some performance improvement.
Current, libvirt invokes qemu with -net tap,fd=X where X is an already
open fd to a tun/tap device. I suspect that after we merge vhost-net,
libvirt could support vhost-net in this mode by just doing -net
vhost,fd=X. I think the only real question for libvirt is whether to
provide a user visible switch to use vhost or to just always use vhost
when it's available and it makes sense. Personally, I think the later
makes sense.
The more interesting invocation of vhost-net though is one where the
vhost-net device backs directly to a physical network card. In this
mode, vhost should get considerably better performance than the current
implementation. I don't know the syntax yet, but I think it's
reasonable to assume that it will look something like -net
tap,dev=eth0. The effect will be that eth0 is dedicated to the guest.
On most modern systems, there is a small number of network devices so
this model is not all that useful except when dealing with SR-IOV
adapters. In that case, each physical device can be exposed as many
virtual devices (VFs). There are a few restrictions here though. The
biggest is that currently, you can only change the number of VFs by
reloading a kernel module so it's really a parameter that must be set at
startup time.
I think there are a few ways libvirt could support vhost-net in this
second mode. The simplest would be to introduce a new tag similar to
<source network='br0'>. In fact, if you probed the device type for the
network parameter, you could probably do something like <source
network='eth0'> and have it Just Work.
Another model would be to have libvirt see an SR-IOV adapter as a
network pool whereas it handled all of the VF management. Considering
how inflexible SR-IOV is today, I'm not sure whether this is the best model.
Has anyone put any more thought into this problem or how this should be
modeled in libvirt? Michael, could you share your current thinking for
-net syntax?
--
Regards,
Anthony Liguori
1 year
[libvirt] [PATCH v2 0/1] storage: vstorage support
by Olga Krishtal
The patch supports pool and volume managment using Vistuozzo Storage (vstorage)
as a backend.
To define pool use:
virsh -c qemu+unix:///system pool-define-as --name VZ --type vstorage
--source-name vz7-vzstorage --target /vzstorage_pool
The resulting XML:
<pool type='vstorage'>
<name>VZ</name>
<uuid>5f45665b-66fa-4b18-84d1-248774cff3a1</uuid>
<capacity unit='bytes'>107374182400</capacity>
<allocation unit='bytes'>1441144832</allocation>
<available unit='bytes'>105933037568</available>
<source>
<name>vz7-vzstorage</name>
</source>
<target>
<path>/vzstorage_pool</path>
<permissions>
<mode>0700</mode>
<owner>0</owner>
<group>0</group>
</permissions>
</target>
</pool>
For the vstorage pool the only obligatory parameter, which stores cluster name,
is --source-name.
v2:
- maximum code reusage
- fixed name issue - we use vstorage
- simplified findPoolSources
Olga Krishtal (1):
storage: vz storage pool support
configure.ac | 28 ++++++++++
docs/schemas/storagepool.rng | 13 +++++
include/libvirt/libvirt-storage.h | 1 +
src/conf/storage_conf.c | 16 +++++-
src/conf/storage_conf.h | 4 +-
src/storage/storage_backend.c | 3 +
src/storage/storage_backend_fs.c | 114 ++++++++++++++++++++++++++++++++++++--
src/storage/storage_backend_fs.h | 3 +
src/storage/storage_driver.c | 2 +
tools/virsh-pool.c | 2 +
tools/virsh.c | 3 +
11 files changed, 181 insertions(+), 8 deletions(-)
--
1.8.3.1
7 years, 11 months
[libvirt] [PATCH 0/2] qemu_cgroup: allow access to /dev/dri/render*
by Ján Tomko
Technically a v2, but v1 is already pushed.
This version is based on the <gl enable> in <spice> instead
of accel3d="yes" in <video><model type="virtio".
It also only allows access to the render* devices, instead of all of them.
https://bugzilla.redhat.com/show_bug.cgi?id=1337290
Ján Tomko (2):
Revert "qemu_cgroup: allow access to /dev/dri for virtio-vga"
qemu_cgroup: allow access to /dev/dri/render*
src/qemu/qemu_cgroup.c | 71 ++++++++++++++++++++++++++++++++++++++++----------
1 file changed, 57 insertions(+), 14 deletions(-)
--
2.7.3
7 years, 11 months
[libvirt] RFC: add recreate option to domain events conf
by Nikolay Shirokovskiy
Hi, all.
Does it make sense to anybody else that rebooting and resetting
a persistent domain from outside or from inside should bring upon
pending configuration changes? For this purpose we can add another
option to on_reboot and other events, say 'recreate'. From technical
POV qemu has enough capabilities, namely -no-reboot option.
Nikolay
7 years, 11 months
Re: [libvirt] question about rdma migration
by Michael R. Hines
Hi Roy,
On 02/09/2016 03:57 AM, Roy Shterman wrote:
> Hi,
>
> I tried to understand the rdma-migration in qemu code and i have two
> questions about it:
>
> 1. I'm working with qemu-kvm using libvirt and i'm getting
>
> MEMLOCK max locked-in-memory address space 65536 65536 bytes
>
> in qemu process so I don't understand how can you use rdma-pin-all
> with such low MEMLOCK.
>
> I found a solution in libvirt to lock all vm memory in advance and to
> enlarge MEMLOCK.
> It uses memoryBacking locking and memory tuning hard_limit of vm
> memory but I couldn't find a usage of this in rdma-migration code.
>
You're absolutey right, the RDMA migration code itself doesn't set this
lock limit explicitly because there are system-wide restrictions in both
appArmour,
/etc/security, as well as SELINUX that restrict applications from
arbitrarily setting their maximum memory lock limits.
The other problem is CGROUPS: If someone sets a cgroup control for
maximum memory and forgets about that mlock() limits, then
there will be a conflict.
So, libvirt must have a policy to deal with all of these possibilities,
not just handle a special case for RDMA migration.
The only way "simple" way (without patching the problems above) to apply
a higher lock limit to QEMU is to set the ulimit for libvirt
(or for QEMU if starting QEMU manually) in your environment or the
command line with $ ulimit # before attempting the migration,
then the RDMA subsystem will be able to lock the memory successfully.
The other option is to use /etc/security/limits.conf and set the option
for a specific libvirt process user and make sure your libvirt/qemu
are not running as root.
QEMU itself also has a "mlock" option built into the command line, but
it also suffers from the same problem --- you have to find
a way (currently) to increase the limit before using the option.
> 2. Do you have any comparison of IOPS and bandwidth between TCP
> migration and rdma migration?
>
Yes, lots of comparisons.
http://wiki.qemu.org/Features/RDMALiveMigration
http://www.canturkisci.com/ETC/papers/IBMJRD2011/preprint.pdf
> Regards,
> Roy
>
>
8 years
[libvirt] Qemu: create empty cdrom
by Gromak Yuriy
Hello.
Qemu is latest from master branch.
Tryingto start a domain, which is connected toa blankcdrom:
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<target dev='sdb' bus='scsi'/>
<readonly/>
<address type='drive' controller='0' target='1' bus='0'
unit='0'/>
</disk>
But I get an error:
qemu-system-x86_64: -drive
if=none,id=drive-scsi0-0-1-0,readonly=on,format=raw: Can't use 'raw' as
a block driver for the protocol level.
8 years, 1 month
[libvirt] qemu-guest-agent windows
by Umar Draz
Hello All,
I have install qemu guest agent on windows 10, but unable to get the ip
address using this command
virsh qemu-agent-command myvm '{ "execute": "guest-network-get-interfaces"
}'
I am getting the following error on above command.
ibvirt: QEMU Driver error : internal error: unable to execute QEMU agent
command 'guest-network-get-interfaces': this feature or command is not
currently supported
but the same command successfully working on linux vms.
Would you please help if there any other way to get the interfaces ip of
windows vm
Br.
Umar
8 years, 1 month
[libvirt] [PATCH v2 00/20] Split parsing and defining logic of daemon's logging
by Erik Skultety
v2 of the original series
https://www.redhat.com/archives/libvir-list/2016-May/msg00229.html
since v1:
- as Cole pointed out in 20/38 of the original series, the patches were not
designed in an elegant way and they were hard to review, so this series reworked
the whole series:
-> first the existing methods that do combine parsing and defining logic
and which should be dropped are renamed to a more accurate name
-> all the necessary methods to achieve the "split" are introduced
gradually, interconnected with each other
-> finally, all the callers switch to the new logic introduced in the early
patches in a transparent way
-> all the original poorly named methods are completely dropped
- also, the original series introduced a new set of API locks because there was
an issue with 2 concurrent setters that while setter1 was preparing its local
set of outputs to replace the existing global one, setter2 might just replace
the global set with its copy, invalidating all fds of the setter1's set because
the original series used a concept of *copying* (not duplicating) of fds, so
the copied fd would be invalidated by issuing reset by setter2.
This series however, duplicates the file-based outputs'
(that should remain opened) fds. So even if setter2 replaces the original set
with its copy and calls reset, effectively closing all fds, it does not matter
for setter1, since unlink only decrements the number of references to a
specific opened fd.
Erik Skultety (20):
virlog: Rename virLogParse* to virLogParseAndDefine*
virlog: Introduce virLogOutputNew
virlog: Introduce virLogFilterNew
virlog: Introduce virLogFindOutput
virlog: Introduce virLogDefineOutputs
virlog: Introduce virLogDefineFilters
virlog: Introduce virLogNewOutputTo* as a replacement for
virLogAddOutputTo*
virlog: Take a special care of syslog when setting new set of log
outputs
virlog: Introduce virLogParseOutput
virlog: Introduce virLogParseFilter
virlog: Introduce virLogParseOutputs
virlog: Introduce virLogParseFilters
virlog: Introduce virLogSetOutputs
virlog: Introduce virLogSetFilters
daemon: Split output parsing and output defining
daemon: Split filter parsing and filter defining
virlog: Remove functions that aren't used anywhere anymore
virlog: Make some of the methods static
virlog: Store the journald fd within the output object
virlog: Split parsing and setting priority
daemon/libvirtd.c | 8 +-
src/libvirt_private.syms | 10 +-
src/locking/lock_daemon.c | 8 +-
src/logging/log_daemon.c | 8 +-
src/util/virlog.c | 1079 ++++++++++++++++++++++++++-------------------
src/util/virlog.h | 61 +--
tests/eventtest.c | 3 +-
tests/testutils.c | 11 +-
tests/virlogtest.c | 10 +-
9 files changed, 702 insertions(+), 496 deletions(-)
--
2.5.5
8 years, 1 month
