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[Libvir] Problem in Migrating domain....
by manon.mani＠wipro.com 03 Apr '08

03 Apr '08

Hi... This is my program for Domain Migrating using virDomainMigrate() Function.... #include <stdlib.h> #include <stdio.h> #include <libvirt/libvirt.h> static virConnectPtr conn = NULL; /* the hypervisor connection */ static int checkDomainState(virDomainPtr dom) { virDomainInfo info; /* the information being fetched */ int ret; ret = virDomainGetInfo(dom, &info); if (ret < 0) { return(-1); } return(info.state); } static void migrate(int id) { virDomainPtr dom = NULL; /* the domain being checked */ virDomainPtr dom1= NULL; int ret, state; /* Find the domain of the given id */ dom = virDomainLookupByID(conn, id); if (dom == NULL) { fprintf(stderr, "Failed to find Domain %d\n", id); goto error; } state = checkDomainState(dom); if ((state == VIR_DOMAIN_RUNNING)) { dom1=virDomainMigrate(dom,conn,VIR_MIGRATE_LIVE,NULL,NULL,0); if(dom1==NULL) { fprintf(stderr,"Failed to migrate"); } else { fprintf(stderr,"migrate successfully"); } } error: if (dom != NULL) virDomainFree(dom); } int main(int argc, char **argv) { int id = 0; /* NULL means connect to local Xen hypervisor */ conn = virConnectOpen(NULL); if (conn == NULL) { fprintf(stderr, "Failed to connect to hypervisor\n"); goto error; } if (argc > 1) { id = atoi(argv[1]); } if (id == 0) { int i, j, ids[10]; i = virConnectListDomains(conn, &ids[0], 10); if (i < 0) { fprintf(stderr, "Failed to list the domains\n"); goto error; } for (j = 0;j < i;j++) { if (ids[j] != 0) { id = ids[j]; break; } } } if (id == 0) { fprintf(stderr, "Failed find a running guest domain\n"); goto error; } migrate(id); error: if (conn != NULL) virConnectClose(conn); return(0); } When I Compile this by the command gcc `pkg-config --cflags --libs libvirt` migrate1.c I got the error... migrate1.c: In function migrate: migrate1.c:67: warning: assignment makes pointer from integer without a cast /tmp/ccmgmkE1.o: In function `migrate': migrate1.c:(.text+0xd4): undefined reference to `virDomainMigrate' collect2: ld returned 1 exit status Can you help me... with regard, Mano

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[Libvir] FW: Problem in Migrating domain....
by manon.mani＠wipro.com 03 Apr '08

03 Apr '08

Hi to all... I was Installed xen and installing Virtual OS... And I Migrate it Mannually... Its Getting Migrated... I want to Write the coding for Automated Migration using the API virDomaiMigrate... Anybody guide me to write the coding... Thanks in advance... With Regards, Mano

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[Libvir] uuid of newly created domain
by Vadim Zaliva 02 Apr '08

02 Apr '08

Hi! I am running into interesting problem with UUID. I am using Ruby bindings, but I think the problem is not specific to Ruby. I am doing roughly the following: dom = c.define_domain_xml(xml) dom1 = c.ookup_domain_by_uuid(dom.uuid) and I got an error that domain with given UUID is not found. If I print UUID of newly defined domain and compare it with output of 'dominfo' command in virsh I can see that it differs. Could anybody shed some light on why UUID returned by define_domain_xml() is invalid? Sincerely, Vadim -- "La perfection est atteinte non quand il ne reste rien a ajouter, mais quand il ne reste rien a enlever." (Antoine de Saint-Exupery)

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[Libvir] [PATCH] [RUBY-LIBVIRT]: Make the flags parameter optional
by Chris Lalancette 02 Apr '08

02 Apr '08

All, While using the ruby-libvirt bindings, I usually end up setting the "flags" parameter to various calls to 0. While this is required by the C side of things, for Ruby we have no such constraint; we can have methods with optional arguments. Since most of the time we will be passing "flags" as 0, we will just assume 0 if it isn't specified, and actually use the value in flags if it is. The attached patch does just that. Note that I've only tested about half of the calls in here; further breakage should be easy to find and fix. Also note that this should not impact existing users, since we will honor the flags they are already passing. Signed-off-by: Chris Lalancette <clalance(a)redhat.com>

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[Libvir] use C99 initializer for lastErr
by Guido Günther 02 Apr '08

02 Apr '08

...this makes things just a bit more readable. -- Guido

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[Libvir] patch: Domain.free() in Ruby bindings
by Vadim Zaliva 01 Apr '08

01 Apr '08

Attached patch adds new method free() to Domain class. Invocation of this method calls virDomainFree(). After this call, all other calls to this domain object would fail. The purpose of this patch is to solve problem caused by libvirt caching, when creation of new domain from XML is re-using previous definition with the same name, if domain object associated with older definition have not been yet freed by Ruby garbage collector (see previous discussion in this mailing list for details). Sincerely, Vadim Zaliva P.S. I think Python bindings will need similar method as well. P.P.S. I have tested this patch, and I can see that it solves the problem I was facing.

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[Libvir] Lxc driver patch
by Daniel Veillard 01 Apr '08

01 Apr '08

Patch against CVS version, it tries to avoid 2 issues: - problem with global data settings when loading of the driver got interrupted. Check more NULLs and reset to NULL, i was getting crashes when running the regression tests and the /etc/libvirtd/lxc was not accessible. - avoid trying to open the driver if not running as root, that's not a problem in normal case because the daemon runs as root, but when running 'make check' as a normal user libvirtd is run as an user and compiling the lxc driver in would break the regression tests Dave could you double-check this, hopefully it has no side effect ? Daniel -- Red Hat Virtualization group http://redhat.com/virtualization/ Daniel Veillard | virtualization library http://libvirt.org/ veillard(a)redhat.com | libxml GNOME XML XSLT toolkit http://xmlsoft.org/ http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/

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[Libvir] [PATCH] lxc: start domain
by Dave Leskovec 01 Apr '08

01 Apr '08

This is a repost of patch four in the last series I posted. It contains the start container support. I've made some changes corresponding to Dan B's patch moving the lxc driver under libvirtd. I removed the isolation forks and cleaned up the status handling and PID storing. Thanks! -- Best Regards, Dave Leskovec IBM Linux Technology Center Open Virtualization

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Re: [Libvir] [PATCH] deep copy dom structure
by Richard W.M. Jones 31 Mar '08

31 Mar '08

On Fri, Mar 28, 2008 at 04:39:31PM +0100, Guido Guenther wrote: > --- > src/virterror.c | 14 ++++++++++++++ > 1 files changed, 14 insertions(+), 0 deletions(-) > > diff --git a/src/virterror.c b/src/virterror.c > index 1463129..49f3b89 100644 > --- a/src/virterror.c > +++ b/src/virterror.c > @@ -115,6 +115,11 @@ virResetError(virErrorPtr err) > free(err->str1); > free(err->str2); > free(err->str3); > + if(err->dom) { > + if(err->dom->name) > + free(err->dom->name); > + free(err->dom); > + } > memset(err, 0, sizeof(virError)); > } > > @@ -383,6 +388,15 @@ __virRaiseError(virConnectPtr conn, virDomainPtr dom, virNetworkPtr net, > virResetError(to); > to->conn = conn; > to->dom = dom; > + if (dom) { > + if (!(to->dom = malloc(sizeof(virDomain)))) { > + fprintf(stderr, "cannot allocate memory in %s", __FUNCTION__); > + } else { > + to->dom->name = strdup(dom->name); > + memcpy (to->dom->uuid, dom->uuid, VIR_UUID_BUFLEN); > + to->dom->id = dom->id; > + } > + } > to->net = net; > to->domain = domain; > to->code = code; What problem are you trying to solve? The 'conn', 'dom' and 'net' fields in a virterror can't be accessed safely, particularly from a garbage-collected language. The only safe thing one could do with them is a physical equality test on the pointer against an existing conn/dom/net pointer. But the solution isn't to copy the dom object, since in a GC-d language someone could grab a handle to the copied dom which would have a different lifetime from the error object. If anything the solution would be to remove those fields from the error object since they are highly unlikely to be useful in any real world application. We can't do this because of backwards compatibility promises but we should instead deprecate them. 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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[Libvir] ruby binding patch
by Vadim Zaliva 31 Mar '08

31 Mar '08

I have attempted to add following methods to Domain class: 1. vcpus= 2. memory= This is my first patch to libvirt-ruby, and I will appreciate your feedback. My next goal is to add binding for virDomainPinVcpu() method. Sincerely, Vadim

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