Previous commits added code to unmount the existing /proc,
/sys and /dev hierarchies on the root filesystem of the
container. This should only have been done if the container's
root filesystem was the same as the host's root. ie if
the root source is '/'. As it is, this causes LXC containersr
to fail to start if their root source is not '/'
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
In preparation for introducing a full RPC protocol for
libvirt_lxc, switch over to using the virNetServer APIs
for the monitor connection
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
While it is not currently used elsewhere in libvirt, the code
for finding a free loop device & associating a file with it
is not LXC specific. Move it into the viffile.{c,h} file where
potentially shared code is more commonly kept.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Move the cgroup object into virLXCControllerPtr and rename
all the setup methods to include 'Cgroup' in their name
if appropriate
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Move the monitor FDs into the virLXCControllerPtr object
removing the need for the 'struct lxcMonitor' object
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The virLXCControllerRun method is getting a little too large,
and about 50% of its code is related to setting up a /dev/pts
mount. Move the latter out into a dedicated method
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Move the security manager object into the virLXCControllerPtr
object. Also simplify the code creating it in the first place
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Move the list of loop device FDs into the virLXCControllerPtr
object and make sure that virLXCControllerStopInit will
close them all
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Turn 'struct lxc_console' into virLXCControllerConsolePtr and make it
a part of virLXCControllerPtr
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Keep a record of the init PID in the virLXCController object
and create a virLXCControllerStopInit method for killing this
process
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Move the veth device name state into the virLXCControllerPtr
object and stop passing it around. Also use size_t instead
of unsigned int for the array length parameters.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The LXC controller code is having to pass around an ever increasing
number of parameters between methods. To make the code more managable
introduce a virLXCControllerPtr to hold all this state, starting with
the container name and virDomainDefPtr object
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Currently the build of libvirt_lxc will cause recompilation
of all sources under src/util, src/conf, src/security and
more. Switch the libvirt_lxc process to link against the
libtool convenience libraries that are already built as
part of the main libvirt.os & libvirtd build process
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Refactor the RPC server dispatcher code so that if 'max_workers==0'
the entire server will run single threaded. This is useful for
use cases where there will only ever be 1 client connected
which serializes its requests
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The callback that is invoked when a new RPC client is
initialized does not have any opaque parameter. Add
one so that custom data can be passed into the callback
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Recently the Ceph project defaulted auth_supported from 'none' to 'cephx'.
When no auth information was set for Ceph disks this would lead to librados defaulting to
'cephx', but there would be no additional authorization information.
We now explicitly set auth_supported to none when passing down arguments to Qemu.
Signed-off-by: Wido den Hollander <wido@widodh.nl>
This patch adds an internal function vmwareUpdateVMStatus to
update the real state of the domain. This function is used in
various places in the driver, in particular to detect when
the domain has been shut down by the user with the "halt"
command.
QEMU domains were marked as having managed save image even if they were
saved using the regular save. With this patch, domains are marked so
only when using managed save API.
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>
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.
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>
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>
