October 2009 - Devel - libvirt List Archives

[libvirt] Using libvirt to obtain mac address of virtual domain
by Carlen, Devin C. (ARC-A)[PEROT SYSTEMS] 21 Oct '09

21 Oct '09

Greetings, I am new to libvirt and am looking for the most efficient way to programmatically obtain the mac address from a virtual domain. Libvirt is providing access to xen and kvm in my case. A nudge in the right direction would be appreciated! Best Regards, Devin Carlen

4 3

[libvirt] [PATCH] tests: Centralize VIR_TEST_DEBUG lookup, and document it
by Cole Robinson 20 Oct '09

20 Oct '09

Provide a simple interface for other tests to lookup the testDebug variable. Also remove a redundant error message in interface tests. If anyone feels inclined to change this env variable to match the existing LIBVIRT_* format, it should now be easier to do so. Signed-off-by: Cole Robinson <crobinso(a)redhat.com> --- HACKING | 10 ++++++++++ tests/interfacexml2xmltest.c | 2 -- tests/statstest.c | 4 ++-- tests/testutils.c | 38 ++++++++++++++++++++++++++------------ tests/testutils.h | 4 ++-- tests/testutilsqemu.c | 2 +- 6 files changed, 41 insertions(+), 19 deletions(-) diff --git a/HACKING b/HACKING index bcff8c6..fba7778 100644 --- a/HACKING +++ b/HACKING @@ -37,6 +37,16 @@ and run the tests: The latter test checks for memory leaks. +If you encounter any failing tests, the VIR_TEST_DEBUG environment variable +may help: + + VIR_TEST_DEBUG=1 make check (or) + VIR_TEST_DEBUG=2 make check + +Also, individual tests can be run from inside the 'tests/' directory, like: + + ./qemuxml2xmltest + (6) Update tests and/or documentation, particularly if you are adding a new feature or changing the output of a program. diff --git a/tests/interfacexml2xmltest.c b/tests/interfacexml2xmltest.c index 5ffebad..ed3093c 100644 --- a/tests/interfacexml2xmltest.c +++ b/tests/interfacexml2xmltest.c @@ -43,8 +43,6 @@ static int testCompareXMLToXMLFiles(const char *xml) { ret = 0; fail: - if (ret != 0) - fprintf(stderr, "expected: -------\n%s", actual); free(actual); virInterfaceDefFree(dev); return ret; diff --git a/tests/statstest.c b/tests/statstest.c index 82c0daa..4c2ea7f 100644 --- a/tests/statstest.c +++ b/tests/statstest.c @@ -25,7 +25,7 @@ static int testDevice(const char *path, int expect) if (actual == expect) { return 0; } else { - if (getenv("DEBUG_TESTS")) + if (virtTestGetDebug()) fprintf(stderr, "Expect %-6d Actual %-6d\n", expect, actual); return -1; } @@ -55,7 +55,7 @@ mymain(int argc ATTRIBUTE_UNUSED, * register a handler to stop error messages cluttering * up display */ - if (!getenv("VIR_TEST_DEBUG")) + if (!virtTestGetDebug()) virSetErrorFunc(NULL, testQuietError); #define DO_TEST(dev, num) \ diff --git a/tests/testutils.c b/tests/testutils.c index e6f5e61..9daec6d 100644 --- a/tests/testutils.c +++ b/tests/testutils.c @@ -45,7 +45,7 @@ ((((int) ((T)->tv_sec - (U)->tv_sec)) * 1000000.0 + \ ((int) ((T)->tv_usec - (U)->tv_usec))) / 1000.0) -unsigned int testDebug = 0; +unsigned int testDebug = -1; static unsigned int testOOM = 0; static unsigned int testCounter = 0; @@ -255,10 +255,10 @@ int virtTestDifference(FILE *stream, const char *actualStart = actual; const char *actualEnd = actual + (strlen(actual)-1); - if (!testDebug) + if (!virtTestGetDebug()) return 0; - if (testDebug < 2) { + if (virtTestGetDebug() < 2) { /* Skip to first character where they differ */ while (*expectStart && *actualStart && *actualStart == *expectStart) { @@ -322,12 +322,30 @@ virtTestErrorHook(int n, void *data ATTRIBUTE_UNUSED) } #endif +unsigned int +virtTestGetDebug() { + char *debugStr; + unsigned int debug; + + if (testDebug != -1) + return testDebug; + + testDebug = 0; + + if ((debugStr = getenv("VIR_TEST_DEBUG")) == NULL) + return 0; + + if (virStrToLong_ui(debugStr, NULL, 10, &debug) < 0) + return 0; + + testDebug = debug; + return testDebug; +} int virtTestMain(int argc, char **argv, int (*func)(int, char **)) { - char *debugStr; int ret; #if TEST_OOM int approxAlloc = 0; @@ -344,10 +362,6 @@ int virtTestMain(int argc, virRandomInitialize(time(NULL) ^ getpid())) return 1; - if ((debugStr = getenv("VIR_TEST_DEBUG")) != NULL) { - if (virStrToLong_ui(debugStr, NULL, 10, &testDebug) < 0) - testDebug = 0; - } #if TEST_OOM if ((oomStr = getenv("VIR_TEST_OOM")) != NULL) { @@ -375,7 +389,7 @@ int virtTestMain(int argc, goto cleanup; #if TEST_OOM_TRACE - if (testDebug) + if (virtTestGetDebug()) virAllocTestHook(virtTestErrorHook, NULL); #endif @@ -393,7 +407,7 @@ int virtTestMain(int argc, approxAlloc = virAllocTestCount(); testCounter++; - if (testDebug) + if (virtTestGetDebug()) fprintf(stderr, "%d) OOM...\n", testCounter); else fprintf(stderr, "%d) OOM of %d allocs ", testCounter, approxAlloc); @@ -415,7 +429,7 @@ int virtTestMain(int argc, if (mp && (n % mp) != (worker - 1)) continue; - if (!testDebug) { + if (!virtTestGetDebug()) { if (mp) fprintf(stderr, "%d", worker); else @@ -444,7 +458,7 @@ int virtTestMain(int argc, } } - if (testDebug) + if (virtTestGetDebug()) fprintf(stderr, " ... OOM of %d allocs", approxAlloc); if (ret == EXIT_SUCCESS) diff --git a/tests/testutils.h b/tests/testutils.h index f036e0f..aef1179 100644 --- a/tests/testutils.h +++ b/tests/testutils.h @@ -34,6 +34,8 @@ int virtTestDifference(FILE *stream, const char *expect, const char *actual); +unsigned int virtTestGetDebug(void); + int virtTestMain(int argc, char **argv, int (*func)(int, char **)); @@ -43,6 +45,4 @@ int virtTestMain(int argc, return virtTestMain(argc,argv, func); \ } -extern unsigned int testDebug; - #endif /* __VIT_TEST_UTILS_H__ */ diff --git a/tests/testutilsqemu.c b/tests/testutilsqemu.c index 9269f5c..eeeb5ec 100644 --- a/tests/testutilsqemu.c +++ b/tests/testutilsqemu.c @@ -132,7 +132,7 @@ virCapsPtr testQemuCapsInit(void) { NULL) == NULL) goto cleanup; - if (testDebug) { + if (virtTestGetDebug()) { char *caps_str; caps_str = virCapabilitiesFormatXML(caps); -- 1.6.0.6

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[libvirt] [PATCH] tests: Initialize virRandom in for test suite.
by Cole Robinson 20 Oct '09

20 Oct '09

Otherwise any virRandom calls will result in a segfault. Signed-off-by: Cole Robinson <crobinso(a)redhat.com> --- tests/testutils.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/tests/testutils.c b/tests/testutils.c index 536441a..e6f5e61 100644 --- a/tests/testutils.c +++ b/tests/testutils.c @@ -340,7 +340,8 @@ int virtTestMain(int argc, #endif if (virThreadInitialize() < 0 || - virErrorInitialize() < 0) + virErrorInitialize() < 0 || + virRandomInitialize(time(NULL) ^ getpid())) return 1; if ((debugStr = getenv("VIR_TEST_DEBUG")) != NULL) { -- 1.6.0.6

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[libvirt] error: unable to connect to '/usr/local/var/run/libvirt/libvirt-sock': Connection refused
by Liu, Zhentao 19 Oct '09

19 Oct '09

Hello, I updated libvirt-bin to version 0.7.0. I still got a error: ------------------------------------------------------------------------------------------- root@forest:/tmp/libvirt-0.7.0# virsh -c qemu:///system list error: unable to connect to '/usr/local/var/run/libvirt/libvirt-sock': Connection refused error: failed to connect to the hypervisor ------------------------------------------------------------------------------------------- Any helps? Regards Zhentao

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[libvirt] Re: [PATCH] also allow use of XZ for Qemu image compression
by Antonio Diaz Diaz 19 Oct '09

19 Oct '09

Daniel Veillard wrote: > xz package dependancy is IMHO a small price to pay: Size: 443012 > to garantee reliability Do you know lzip (http://www.nongnu.org/lzip/lzip.html)? Lzip package size is only 55156 bytes, it is stable (xz is beta), some people consider it better designed than xz (http://lpar.ath0.com/2009/09/25/documentation-as-an-indicator-of-code-quali…) and may very well be the LZMA file format that succeeds. Best regards, Antonio.

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[libvirt] [PATCH] Better error reporting for failed migration.
by Chris Lalancette 19 Oct '09

19 Oct '09

The comment in the code says most of it, but when the destination hostname resolution is screwed up, print a proper error instead of the very unhelpful "unknown error". Note that I'm not overly fond of the wording in the error message, so I'm open to suggestions. Signed-off-by: Chris Lalancette <clalance(a)redhat.com> --- src/qemu/qemu_driver.c | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index d37b184..02bb5cb 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -6288,6 +6288,22 @@ qemudDomainMigratePrepare2 (virConnectPtr dconn, goto cleanup; } + /* Remember that we are running on the destination. The hostname that + * we resolve here will be used on the source machine in the "migrate" + * monitor command. Because of that, localhost is almost always the + * wrong thing. Adding this check explicitly breaks localhost + * migration, but only for those machines that have improperly + * configured hostname resolution. + */ + if (STREQ(hostname, "localhost")) { + VIR_FREE(hostname); + qemudReportError(dconn, NULL, NULL, VIR_ERR_INVALID_ARG, "%s", + _("Could not resolve destination hostname; " + "either fix destination to resolve hostname, " + "or use the optional URI migration parameter")); + goto cleanup; + } + /* XXX this really should have been a properly well-formed * URI, but we can't add in tcp:// now without breaking * compatability with old targets. We at least make the -- 1.6.0.6

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[libvirt] error: failed to connect to the hypervisor
by Liu, Zhentao 19 Oct '09

19 Oct '09

Hello, I have reinstalled libvirt-bin on ubuntu 9.04. Then I got a error: ------------------------------------------------------------------------ root@forest:/usr/local/etc/logrotate.d# virsh -c qemu:///system list error: failed to connect to the hypervisor ----------------------------------------------------------------------- ps: I have installed kvm on ubuntu. Any ideas? Regards Zhentao

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[libvirt] libvirt and Linux KVM migrate_set_speed
by Monchiero, Matteo 19 Oct '09

19 Oct '09

Does Libvirt has an interface for KVM's migrate_set_speed? Thanks --matteo

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[libvirt] Tyrel Datwyler is out of the office.
by Tyrel Datwyler 18 Oct '09

18 Oct '09

I will be out of the office starting 10/14/2009 and will not return until 10/19/2009. I will respond to your message when I return.

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[libvirt] error: failed to connect to the hypervisor
by Liu, Zhentao 18 Oct '09

18 Oct '09

Hello, I have installed libvirt-bin 0.6.1 on the ubuntu 9.04. When I run "virsh -c qemu:///system list", I get this error: ---------------------------------------------------------------------------- unable to connect to '/var/run/libvirt/libvirt-sock': Permission denied failed to connect to the hypervisor ----------------------------------------------------------------------------- Then I search in the Internet, it may be a bug of version 0.6.1. So I update libvirt-bin to version 0.6.3, but I still get a error: --------------------------------------------------------------------------------- root@forest:/home/zli# virsh -c qemu:///system list error: failed to connect to the hypervisor ---------------------------------------------------------------------------------- I have no idea about the reason. Any helps? Regards Zhentao

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