December 2008 - Devel - libvirt List Archives

[libvirt] libvirt autostart VM is broken
by Dr. Michael J. Chudobiak 19 Dec '08

19 Dec '08

Hi all, The libvirtd autostart VM option seems to be broken [1,2], so I need a work-around. How can I start the libvirtd service, and then (after the service has fully started) start a particular VM from the command line? (I can do this from the gui of course, but I want to stick it in a script). - Mike [1] https://bugzilla.redhat.com/show_bug.cgi?id=477025 [2] http://www.mail-archive.com/libvir-list@redhat.com/msg09937.html

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Re: [libvirt] libvirt remote connection failing
by Richard W.M. Jones 19 Dec '08

19 Dec '08

On Fri, Dec 19, 2008 at 11:44:47AM +0530, Shanmuga Rajan wrote: > i am getting the following error > > >>> dcconn = libvirt.open('qemu://192.168.1.82/system') Try: LIBVIRT_DEBUG=1 virsh -c qemu://192.168.1.82/system nodeinfo Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-df lists disk usage of guests without needing to install any software inside the virtual machine. Supports Linux and Windows. http://et.redhat.com/~rjones/virt-df/

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[libvirt] [PATCH] fix device hotplug
by Guido Günther 18 Dec '08

18 Dec '08

Hi, due to some restructuring we free the device structure so devices are plugged correctly but "dumpxml" fails since the dev structure is already freed. Cheers, -- Guido

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[libvirt] Website typo
by Richard W.M. Jones 18 Dec '08

18 Dec '08

Spotted by 'aozturk' on #virt ... Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://et.redhat.com/~rjones/virt-top

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[libvirt] libvirt remote connection failing
by Shanmuga Rajan 18 Dec '08

18 Dec '08

hi I was trying to migrate KVM based vM between two machine. when i tried to make connection with destination machine but it is not working for me. i got some error. i tried the following uri qemu://192.168.1.22/ qemu://hostname/ everything is failed. Can any one help me with correct uri to connect with remote machine. i am using python binding of libvirt. KVM-79 libvirt 5.0 Thanks and Regards, - Shan

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[libvirt] [PATCH] 2/8 logging header and core implementation
by Daniel Veillard 18 Dec '08

18 Dec '08

This exports the internal function from logging.h (later the public part should be moved to libvirt.h) augments the set of convenience macros. libvirt_sym.version.in is also extended to export internally all the header functions, Daniel -- Daniel Veillard | libxml Gnome XML XSLT toolkit http://xmlsoft.org/ daniel(a)veillard.com | Rpmfind RPM search engine http://rpmfind.net/ http://veillard.com/ | virtualization library http://libvirt.org/

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[libvirt] PATCH: 0/28: Thread safety for libvirtd daemon and drivers
by Daniel P. Berrange 18 Dec '08

18 Dec '08

The following huge series of patches adds thread safety for the libvirtd daemon and drivers, and makes the daemon multi-threaded in processing RPC calls. This enables multiple clients to be processed in parallel, without blocking each other. It does not change the thread rules for the virConnectPtr object though, so each individual client is still serialized. There are two core places where we have to have synchronization in the threading model this patch series introduces - The libvirt daemon code - A single global server lock (aka struct qemud_server) - One lock per client connection (aka struct qemud_client) - The driver implementations - One lock per driver (aka QEMU, LXC, Test, UML, OpenVZ, Network, Storage, Node Devices) - One lock per primary object in a driver (virDomainObjPtr, virNetworkObjPtr, virStoragePoolObjPtr, virNodeDeviceObjptr instances) For most cases, the big global server / driver locks are only held while obtaining one of the finer grained locks. This gives a fairly good level of concurrency for operations touching different objects. Once this core infrastructure is merged, it will be possible to iterate on impl of drivers to reduce the time locks are held - eg avoid holding a lock while talking to the QEMU monitor interface. To try and make it easier to spot thread locking problems this series refactors alot of methods so that there is only a single return point where the unlock call can be placed, rather than multiple return point which increases the chances of missing an unlock call. This touches a huge amount of code, so I'd like to get this all merged ASAP as it'll be really hard to keep it synced with ongoing changes. Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|

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[libvirt] [PATCH 1/5] write pid file into stateDir
by Guido Günther 18 Dec '08

18 Dec '08

Let qemu write out a pid file so we can check in stateDir for running vm later. TODO: Fix up the rest of the qemuxml2argvdata testcases, simple search and replace. I sikpped that for now since it makes rebasing harder. --- src/libvirt_sym.version.in | 1 + src/qemu_conf.c | 7 +++++++ src/qemu_conf.h | 1 + src/qemu_driver.c | 15 +++++++++++++++ src/util.c | 20 ++++++++++++++++---- src/util.h | 2 ++ .../qemuxml2argv-hostdev-usb-address.args | 2 +- tests/qemuxml2argvtest.c | 2 ++ 8 files changed, 45 insertions(+), 5 deletions(-) diff --git a/src/libvirt_sym.version.in b/src/libvirt_sym.version.in index de0bc4a..1eff790 100644 --- a/src/libvirt_sym.version.in +++ b/src/libvirt_sym.version.in @@ -592,6 +592,7 @@ LIBVIRT_PRIVATE_@VERSION@ { virFileMakePath; virFileOpenTty; virFileReadLimFD; + virFilePid; virFileReadPid; virFileLinkPointsTo; virParseNumber; diff --git a/src/qemu_conf.c b/src/qemu_conf.c index e6c378f..218aefa 100644 --- a/src/qemu_conf.c +++ b/src/qemu_conf.c @@ -724,6 +724,7 @@ int qemudBuildCommandLine(virConnectPtr conn, const char *emulator; char uuid[VIR_UUID_STRING_BUFLEN]; char domid[50]; + char *pidfile; uname(&ut); @@ -816,6 +817,9 @@ int qemudBuildCommandLine(virConnectPtr conn, snprintf(memory, sizeof(memory), "%lu", vm->def->memory/1024); snprintf(vcpus, sizeof(vcpus), "%lu", vm->def->vcpus); snprintf(domid, sizeof(domid), "%d", vm->def->id); + pidfile = virFilePid(driver->stateDir, vm->def->name); + if (!pidfile) + goto error; ADD_ENV_LIT("LC_ALL=C"); @@ -870,6 +874,9 @@ int qemudBuildCommandLine(virConnectPtr conn, ADD_ARG_LIT("-monitor"); ADD_ARG_LIT("pty"); + ADD_ARG_LIT("-pidfile"); + ADD_ARG(pidfile); + if (vm->def->localtime) ADD_ARG_LIT("-localtime"); diff --git a/src/qemu_conf.h b/src/qemu_conf.h index 36d09d1..ffbd0e7 100644 --- a/src/qemu_conf.h +++ b/src/qemu_conf.h @@ -62,6 +62,7 @@ struct qemud_driver { char *configDir; char *autostartDir; char *logDir; + char *stateDir; unsigned int vncTLS : 1; unsigned int vncTLSx509verify : 1; char *vncTLSx509certdir; diff --git a/src/qemu_driver.c b/src/qemu_driver.c index ca96223..a2e573e 100644 --- a/src/qemu_driver.c +++ b/src/qemu_driver.c @@ -220,6 +220,10 @@ qemudStartup(void) { if ((base = strdup (SYSCONF_DIR "/libvirt")) == NULL) goto out_of_memory; + + if (asprintf (&qemu_driver->stateDir, + "%s/run/libvirt/qemu/", LOCAL_STATE_DIR) == -1) + goto out_of_memory; } else { if (!(pw = getpwuid(uid))) { qemudLog(QEMUD_ERR, _("Failed to find user record for uid '%d': %s\n"), @@ -233,6 +237,16 @@ qemudStartup(void) { if (asprintf (&base, "%s/.libvirt", pw->pw_dir) == -1) goto out_of_memory; + + if (asprintf (&qemu_driver->stateDir, + "%s/run/libvirt/qemu/", base) == -1) + goto out_of_memory; + } + + if (virFileMakePath(qemu_driver->stateDir) < 0) { + qemudLog(QEMUD_ERR, _("Failed to create state dir '%s': %s\n"), + qemu_driver->stateDir, strerror(errno)); + goto error; } /* Configuration paths are either ~/.libvirt/qemu/... (session) or @@ -378,6 +392,7 @@ qemudShutdown(void) { VIR_FREE(qemu_driver->logDir); VIR_FREE(qemu_driver->configDir); VIR_FREE(qemu_driver->autostartDir); + VIR_FREE(qemu_driver->stateDir); VIR_FREE(qemu_driver->vncTLSx509certdir); VIR_FREE(qemu_driver->vncListen); diff --git a/src/util.c b/src/util.c index da26009..481f136 100644 --- a/src/util.c +++ b/src/util.c @@ -918,6 +918,17 @@ int virFileOpenTty(int *ttymaster ATTRIBUTE_UNUSED, #endif +char* virFilePid(const char *dir, const char* name) +{ + char* pidfile; + + if (asprintf(&pidfile, "%s/%s.pid", dir, name) < 0) { + pidfile = NULL; + } + return pidfile; +} + + int virFileWritePid(const char *dir, const char *name, pid_t pid) @@ -930,7 +941,7 @@ int virFileWritePid(const char *dir, if ((rc = virFileMakePath(dir))) goto cleanup; - if (asprintf(&pidfile, "%s/%s.pid", dir, name) < 0) { + if (!(pidfile = virFilePid(dir, name))) { rc = ENOMEM; goto cleanup; } @@ -973,7 +984,8 @@ int virFileReadPid(const char *dir, FILE *file; char *pidfile = NULL; *pid = 0; - if (asprintf(&pidfile, "%s/%s.pid", dir, name) < 0) { + + if (!(pidfile = virFilePid(dir, name))) { rc = ENOMEM; goto cleanup; } @@ -1006,8 +1018,8 @@ int virFileDeletePid(const char *dir, int rc = 0; char *pidfile = NULL; - if (asprintf(&pidfile, "%s/%s.pid", dir, name) < 0) { - rc = errno; + if (!(pidfile = virFilePid(dir, name))) { + rc = ENOMEM; goto cleanup; } diff --git a/src/util.h b/src/util.h index 0748cbf..58488ae 100644 --- a/src/util.h +++ b/src/util.h @@ -79,6 +79,8 @@ int virFileOpenTty(int *ttymaster, char **ttyName, int rawmode); +char* virFilePid(const char *dir, + const char *name); int virFileWritePid(const char *dir, const char *name, pid_t pid); diff --git a/tests/qemuxml2argvdata/qemuxml2argv-hostdev-usb-address.args b/tests/qemuxml2argvdata/qemuxml2argv-hostdev-usb-address.args index 3d6c16d..e1c5638 100644 --- a/tests/qemuxml2argvdata/qemuxml2argv-hostdev-usb-address.args +++ b/tests/qemuxml2argvdata/qemuxml2argv-hostdev-usb-address.args @@ -1 +1 @@ -LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor pty -no-acpi -boot c -hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none -usb -usbdevice host:014.006 +LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor pty -pidfile /tmp/QEMUGuest1.pid -no-acpi -boot c -hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none -usb -usbdevice host:014.006 diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c index 6e5355a..585eb08 100644 --- a/tests/qemuxml2argvtest.c +++ b/tests/qemuxml2argvtest.c @@ -156,6 +156,8 @@ mymain(int argc, char **argv) if ((driver.caps = testQemuCapsInit()) == NULL) return EXIT_FAILURE; + if((driver.stateDir = strdup("/tmp")) == NULL) + return EXIT_FAILURE; #define DO_TEST(name, extraFlags) \ do { \ -- 1.6.0.2

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[libvirt] how to connect LXC via libvirt
by Ian jonhson 18 Dec '08

18 Dec '08

Hi Daniel, I followed the instructions in: https://lists.linux-foundation.org/pipermail/containers/2008-September/0132… to try to connect with LXC which is built in my VM (ubuntu7.10 + kernel 2.6.27-rc8). Unfortunately, I fail. The container can work when I use its user-space interfaces, however I can not execute the "virsh --connect lxc:/// define mycontainer.xml" after I have installed the libvirt (downloaded from CVS). I checked the libvirt.c and found there are only the "xen:///" support, not any codes to support LXC. Therefore, I am wondering whether LXC has been supported in libvirt mainstream and what should I do to get the result as your statement in maillist. Thanks, Ian

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[libvirt] [PATCH] Fix compiler warnings in test code
by john.levon＠sun.com 18 Dec '08

18 Dec '08

# HG changeset patch # User john.levon(a)sun.com # Date 1229399267 28800 # Node ID 1b81ac255ad765ab782829e7fe0a55dc7bab72ab # Parent ee6ccfc062f49f514d7ae8924d5a596b18441fee Fix compiler warnings in test code Signed-off-by: John Levon <john.levon(a)sun.com> diff --git a/src/test.c b/src/test.c --- a/src/test.c +++ b/src/test.c @@ -1299,7 +1299,7 @@ static unsigned long testGetMaxMemory(vi static unsigned long testGetMaxMemory(virDomainPtr domain) { testConnPtr privconn = domain->conn->privateData; virDomainObjPtr privdom; - unsigned long ret = -1; + unsigned long ret = (unsigned long)-1; testDriverLock(privconn); privdom = virDomainFindByName(&privconn->domains, diff --git a/tests/nodeinfotest.c b/tests/nodeinfotest.c --- a/tests/nodeinfotest.c +++ b/tests/nodeinfotest.c @@ -9,6 +9,16 @@ #include "internal.h" #include "nodeinfo.h" #include "util.h" + +#ifndef __linux__ + +static int +mymain(int argc, char **argv) +{ + exit (77); /* means 'test skipped' for automake */ +} + +#else static char *progname; static char *abs_srcdir; @@ -78,9 +88,6 @@ mymain(int argc, char **argv) "nodeinfo-6", }; char cwd[PATH_MAX]; -#ifndef __linux__ - exit (77); /* means 'test skipped' for automake */ -#endif abs_srcdir = getenv("abs_srcdir"); if (!abs_srcdir) @@ -102,4 +109,7 @@ mymain(int argc, char **argv) return(ret==0 ? EXIT_SUCCESS : EXIT_FAILURE); } +#endif /* __linux__ */ + VIRT_TEST_MAIN(mymain) +

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