May 2009 - Devel - libvirt List Archives

[libvirt] PATCH: 0/5: API for converting domain XML to/from native config formats
by Daniel P. Berrange 20 May '09

20 May '09

This is a long overdue update to the idea I described here http://www.redhat.com/archives/libvir-list/2009-April/msg00266.html And the initial patch posted here http://www.redhat.com/archives/libvir-list/2009-April/msg00401.html 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] lxc: use new error code in lxcDomainUndefine
by Amy Griffis 20 May '09

20 May '09

Update lxcDomainUndefine() to use VIR_ERR_INVALID_OPERATION instead of VIR_ERR_INTERNAL_ERROR. Signed-off-by: Amy Griffis <amy.griffis(a)hp.com> diff --git a/src/lxc_driver.c b/src/lxc_driver.c index 5392af1..64c735d 100644 --- a/src/lxc_driver.c +++ b/src/lxc_driver.c @@ -329,13 +329,13 @@ static int lxcDomainUndefine(virDomainPtr dom) } if (virDomainIsActive(vm)) { - lxcError(dom->conn, dom, VIR_ERR_INTERNAL_ERROR, + lxcError(dom->conn, dom, VIR_ERR_OPERATION_INVALID, "%s", _("cannot delete active domain")); goto cleanup; } if (!vm->persistent) { - lxcError(dom->conn, dom, VIR_ERR_INTERNAL_ERROR, + lxcError(dom->conn, dom, VIR_ERR_OPERATION_INVALID, "%s", _("cannot undefine transient domain")); goto cleanup; }

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[libvirt] virStorageVolLookupByPath fails with "libvir: Storage error : invalid storage volume pointer in no storage vol with matching path"
by Francesco Latino 19 May '09

19 May '09

Hello, I have a running KVM virtual guest "demo1" with a defined disk at path /guests/mydisk.img. But when I run conn = virConnectOpenReadOnly(NULL); path = "/guests/mydisk.img"; virStorageVolLookupByPath(conn,path); I got the error " ibvir: Storage error : invalid storage volume pointer in no storage vol with matching path " what am I missing ? Thanks, Francesco

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[libvirt] [PATCH] python: Better error reporting if 'import libvirtmod' fails
by Cole Robinson 19 May '09

19 May '09

Don't squash a possibly legitimate libvirtmod error (e.g. some from clashing libvirt.so versions) with 'Cannot import cygvirtmod' --- python/libvir.py | 8 ++++++-- 1 files changed, 6 insertions(+), 2 deletions(-) diff --git a/python/libvir.py b/python/libvir.py index 8a16dd0..3cda8dc 100644 --- a/python/libvir.py +++ b/python/libvir.py @@ -8,8 +8,12 @@ # On cygwin, the DLL is called cygvirtmod.dll try: import libvirtmod -except: - import cygvirtmod as libvirtmod +except ImportError, lib_e: + try: + import cygvirtmod as libvirtmod + except ImportError, cyg_e: + if str(cyg_e).count("No module named"): + raise lib_e import types -- 1.6.2.2

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[libvirt] [PATCH v2 0/2] FS backend VolCreateXMLFrom implementation.
by Cole Robinson 19 May '09

19 May '09

The following 2 patches implement virStorageVolCreateXMLFrom for the storage driver and the FS storage backend. Changes from v1: - Mark origvol as building in driver implementation - Make sure driver is locked when relocking pool object - Simplify sparse file detection with memcmp - Allocate read buffer on the heap. Thanks, Cole Cole Robinson (2): Storage driver implementation for CreateXMLFrom VolumeCreateXMLFrom FS storage backend implementation. src/storage_backend.h | 2 + src/storage_backend_fs.c | 247 +++++++++++++++++++++++++++++++++++++++------- src/storage_driver.c | 159 +++++++++++++++++++++++++++++- 3 files changed, 369 insertions(+), 39 deletions(-)

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[libvirt] libvirt API to write sectors on a device
by Francesco Latino 19 May '09

19 May '09

Hello,***I am able to compile libvirt samples on my KVM hypervisor. (I edited and recompiled info.c code) *I am creating a sample code to read/write disk devices. With method *virDomainBlockPeek I can** read sectors from a given device attached to a KVM virtual guest.**I am not able to* find an API to write sectors on a disk: am I missing something ?Is there such method to write sectors from a given virtual disk ? Thanks,Francesco

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[libvirt] [PATCH 0/5] Interface Config Public APIs and remote stubs, with MAC addresses in string format
by Laine Stump 19 May '09

19 May '09

These patches are based on those I sent last week (the public virInterface*() API definition, the local plumbing, and the RPC glue), but with suggestions incorporated: 1) MAC address is always used in null-terminated ASCII string format. This eliminates any potential problems with extra long addresses. 2) no comments in libvirt.h 3) flags arguments are all unsigned. Item (1) caused changes in most of the patches, so I just regenerated the entire set. Is this the proper/expected thing to do, or should I be making patches of patches?

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[libvirt] PATCH: Enable migration with QEMU >= 0.10.0
by Daniel P. Berrange 19 May '09

19 May '09

The KVM migration code was added to QEMU for the 0.10.0 release, so we should enable this in libvirt now. Daniel diff -r be7993675e07 src/qemu_conf.c --- a/src/qemu_conf.c Thu Apr 30 14:49:27 2009 +0100 +++ b/src/qemu_conf.c Thu Apr 30 15:08:45 2009 +0100 @@ -473,16 +473,13 @@ int qemudExtractVersionInfo(const char * /* * Handling of -incoming arg with varying features - * -incoming tcp (kvm >= 79) - * -incoming exec (kvm >= 80) + * -incoming tcp (kvm >= 79, qemu >= 0.10.0) + * -incoming exec (kvm >= 80, qemu >= 0.10.0) * -incoming stdio (all earlier kvm) * * NB, there was a pre-kvm-79 'tcp' support, but it * was broken, because it blocked the monitor console * while waiting for data, so pretend it doesn't exist - * - * XXX when next QEMU release after 0.9.1 arrives, - * we'll need to add MIGRATE_QEMU_TCP/EXEC here too */ if (kvm_version >= 79) { flags |= QEMUD_CMD_FLAG_MIGRATE_QEMU_TCP; @@ -490,6 +487,9 @@ int qemudExtractVersionInfo(const char * flags |= QEMUD_CMD_FLAG_MIGRATE_QEMU_EXEC; } else if (kvm_version > 0) { flags |= QEMUD_CMD_FLAG_MIGRATE_KVM_STDIO; + } else if (version >= 10000) { + flags |= QEMUD_CMD_FLAG_MIGRATE_QEMU_TCP; + flags |= QEMUD_CMD_FLAG_MIGRATE_QEMU_EXEC; } if (retversion) -- |: 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: Declare QEMU migration capabilities
by Daniel P. Berrange 18 May '09

18 May '09

This patches adds the missing data in the capabilities XML about the QEMU driver's migration support. Specifically it declares support for both offline and live migrate, and registers the 'tcp' URI scheme. Daniel diff -r 00f2e113eca8 src/qemu_conf.c --- a/src/qemu_conf.c Mon May 18 12:38:18 2009 +0100 +++ b/src/qemu_conf.c Mon May 18 13:15:33 2009 +0100 @@ -371,7 +371,7 @@ virCapsPtr qemudCapsInit(void) { uname (&utsname); if ((caps = virCapabilitiesNew(utsname.machine, - 0, 0)) == NULL) + 1, 1)) == NULL) goto no_memory; /* Using KVM's mac prefix for QEMU too */ @@ -380,6 +380,9 @@ virCapsPtr qemudCapsInit(void) { if (virCapsInitNUMA(caps) < 0) goto no_memory; + virCapabilitiesAddHostMigrateTransport(caps, + "tcp"); + /* First the pure HVM guests */ for (i = 0 ; i < ARRAY_CARDINALITY(arch_info_hvm) ; i++) if (qemudCapsInitGuest(caps, -- |: 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] Domain Event Handlers
by Noah Zoschke 18 May '09

18 May '09

Hello, I have been playing around with the libvirt domain event handlers in Python and am seeing something surprising. I am using trunk libvirt and `event-test.py` with some more of the debugging strings uncommented. When I trigger my first event: virsh # define xppro-sp2-0.img.xml Domain xppro-sp2-0.img defined from xppro-sp2-0.img.xml The timeout and handle callbacks are called, but not my domainEventRegister handler: Invoking Timeout CB Invoking Handle CB When I trigger a second event: virsh # create xppro-sp2-0.img.xml Domain xppro-sp2-0.img created from xppro-sp2-0.img.xml my event handler for the first event is finally called: Invoking Timeout CB domainEventHandler EVENT: Domain xppro-sp2-0.img(-1) Added 1 Invoking Handle CB Likewise for a third event: virsh # destroy xppro-sp2-0.img Domain xppro-sp2-0.img destroyed Invoking Timeout CB domainEventHandler EVENT: Domain xppro-sp2-0.img(1) Started 0 Invoking Handle CB So my handler is always one event behind. This behavior is not intended is it? Am I missing either something in `event-test.py` or in how I am using virsh that would correct this behavior? Thank you, Noah

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