October 2009 - Libguestfs - libguestfs List Archives

Ohloh think's we're all XML now ...
by Richard W.M. Jones 19 Oct '09

19 Oct '09

Bizarre uptick in the amount of XML reported by Ohloh here: http://www.ohloh.net/p/libguestfs/analyses/latest Which in one sense is true. We added some example XML output from virt-inspector to the repository: $ find -name '*.xml'|xargs wc -l 6822 ./inspector/example1.xml 7323 ./inspector/example2.xml 577 ./inspector/example3.xml 17 ./inspector/example4.xml 14739 total Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://et.redhat.com/~rjones/libguestfs/ See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html

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[PATCH] inspector: Generate language bindings for OCaml.
by Richard W.M. Jones 13 Oct '09

13 Oct '09

-- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones New in Fedora 11: Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 70 libraries supprt'd http://fedoraproject.org/wiki/MinGW http://www.annexia.org/fedora_mingw

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FYI, lvs.ml: Unbound value Guestfs.create
by Jim Meyering 05 Oct '09

05 Oct '09

FYI, while "make" succeeded in this directory on Friday, I ran "make clean" today from the top, then "make" and got this: Making all in examples make[3]: Entering directory `/home/j/w/co/libguestfs/ocaml/examples' ocamlfind ocamlopt \ -warn-error A -I .. mlguestfs.cmxa lvs.ml -o lvs File "lvs.ml", line 11, characters 10-24: Error: Unbound value Guestfs.create make[3]: *** [lvs] Error 2 make[3]: Leaving directory `/home/j/w/co/libguestfs/ocaml/examples' make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory `/home/j/w/co/libguestfs/ocaml' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/j/w/co/libguestfs' make: *** [all] Error 2 [Exit 2]

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[PATCH libguestfs] build: fix compile error
by Jim Meyering 02 Oct '09

02 Oct '09

>From 3a09d409df89d72ca476ed829739b4aacf08735d Mon Sep 17 00:00:00 2001 From: Jim Meyering <meyering(a)redhat.com> Date: Fri, 2 Oct 2009 16:09:19 +0200 Subject: [PATCH libguestfs] build: fix compile error Link demo scripts with just-build library, not the installed one. * ocaml/examples/Makefile.am (OCAMLFINDFLAGS): New variable. (lvs, viewer): Use it. This fix is based on a suggestion from Rich Jones. This addresses <http://bugzilla.redhat.com/526917>. --- ocaml/examples/Makefile.am | 9 ++++++--- 1 files changed, 6 insertions(+), 3 deletions(-) diff --git a/ocaml/examples/Makefile.am b/ocaml/examples/Makefile.am index b516647..3b9901a 100644 --- a/ocaml/examples/Makefile.am +++ b/ocaml/examples/Makefile.am @@ -6,15 +6,18 @@ if HAVE_OCAML noinst_SCRIPTS = lvs +OCAMLFINDFLAGS = -ccopt '-L $(top_builddir)/src/.libs' + lvs: lvs.ml - $(OCAMLFIND) ocamlopt -warn-error A -I .. mlguestfs.cmxa $< -o $@ + $(OCAMLFIND) ocamlopt $(OCAMLFINDFLAGS) \ + -warn-error A -I .. mlguestfs.cmxa $< -o $@ if BUILD_OCAML_VIEWER noinst_SCRIPTS += viewer viewer: throbber.ml xmllight_loader.mli xmllight_loader.ml viewer.ml - ocamlducefind opt \ + ocamlducefind opt $(OCAMLFINDFLAGS) \ -warn-error A \ -thread \ -package libvirt,lablgtk2,extlib,xml-light,ocamlduce,threads -I .. \ @@ -30,4 +33,4 @@ throbber.ml: Throbber.png Throbber.gif endif -endif \ No newline at end of file +endif -- 1.6.5.rc2.177.ga9dd6

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[PATCH 0/2] Add RELAX NG schema and tests for virt-inspector --xml
by Richard W.M. Jones 02 Oct '09

02 Oct '09

-- 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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[PATCH] New tool: virt-edit
by Richard W.M. Jones 02 Oct '09

02 Oct '09

This adds a virt-edit command. This is already possible using guestfish: guestfish -i domain ><fs> vi /some/file but having a special command to do it makes the operation more obvious and easier. Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://et.redhat.com/~rjones/libguestfs/ See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html

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[PATCH] inspector: Canonicalize device names (fix RHBZ#526717).
by Richard W.M. Jones 01 Oct '09

01 Oct '09

This seems to be the completed fix for: https://bugzilla.redhat.com/show_bug.cgi?id=526717 -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones Read my programming blog: http://rwmj.wordpress.com Fedora now supports 75 OCaml packages (the OPEN alternative to F#) http://cocan.org/getting_started_with_ocaml_on_red_hat_and_fedora

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[PATCH] run-*-locally: The programs are now virt-[tool], not virt-[tool].pl
by Richard W.M. Jones 01 Oct '09

01 Oct '09

All the run-*-locally scripts were broken ... Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v

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[PATCH] inspector: Don't bomb if no kernels detected.
by Richard W.M. Jones 01 Oct '09

01 Oct '09

This is a partial fix for https://bugzilla.redhat.com/show_bug.cgi?id=526717 Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://et.redhat.com/~rjones/libguestfs/ See what it can do: http://et.redhat.com/~rjones/libguestfs/recipes.html

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[PATCH] v2v-snapshot: Improve documentation
by Matthew Booth 01 Oct '09

01 Oct '09

Highlight that the tool is not a general purpose snapshotting tool. Add some examples. --- snapshot/v2v-snapshot.pl | 79 +++++++++++++++++++++++++++++++++++++++++++--- 1 files changed, 74 insertions(+), 5 deletions(-) diff --git a/snapshot/v2v-snapshot.pl b/snapshot/v2v-snapshot.pl index ce66bca..8408d13 100755 --- a/snapshot/v2v-snapshot.pl +++ b/snapshot/v2v-snapshot.pl @@ -48,11 +48,13 @@ v2v-snapshot - Convert a guest to use a qcow2 snapshot for storage =head1 DESCRIPTION -v2v-snapshot is a tool for creating a local snapshot of a guest's storage. It -is suitable for use when making a change to a guest which might have to be -rolled back. It is not intended as a long-term storage option. v2v-snapshot -creates a qcow2 snapshot for all a guest's block devices and updates the guest's -libvirt domain to use them. +v2v-snapshot is a tool for creating a local snapshot of a guest's storage. It is +suitable for use when making a change to a guest which might have to be rolled +back. v2v-snapshot creates a qcow2 snapshot for all a guest's block devices and +updates the guest's libvirt domain to use them. + +B<v2v-snapshot can only snapshot a guest which is shutdown. It is not intended +as a long-term storage option.> When a change has been tested, v2v-snapshot can either commit the change, which will update the original storage with the changes made to the snapshot, or @@ -757,6 +759,73 @@ sub _get_xml_path return $xmldir.'/'._get_guest_name($dom).'.xml'; } +=head1 EXAMPLES + +=head2 Snapshot a local guest + +=over + +This example covers snapshotting a guest which is available through libvirt on +the local machine. The guest domain's name is I<E<lt>guestE<gt>>. + +First ensure the guest is shutdown: + + # virsh destroy <guest> + +Snapshot the guest: + + # v2v-snapshot <guest> + +Start the guest, make some changes, modify hardware, test changes. To commit +the changes: + + # v2v-snapshot --commit <guest> + +Alternatively, to rollback the changes: + + # v2v-snapshot --rollback <guest> + +=back + +=head2 Snapshot an imported guest + +=over + +This example covers snapshotting a guest which has been copied from another +machine. For this to work you must have the domain XML exported from the origin +machine: + + (Origin) # virsh dumpxml <guest> > guest.xml + +You must also present all of the guest's disk images to the local machine in the +locations specified in guest.xml. If copying the images, the easiest +way to achieve this is to copy it to the same path on the local machine as it +had on the origin machine. If the storage can be remotely mounted, it should be +presented to the local machine with the same paths as on the origin machine. If +the location of the storage must change, you must manually edit guest.xml to +reflect the new paths. + +If it is possible to create the domain on the local machine: + + # v2v-snapshot -i libvirtxml guest.xml + +This command will create the imported domain locally with snapshot storage. + +If it is not possible to create the domain locally, for example because it is a +Xen domain and the local libvirt cannot manage Xen domains: + + # v2v-snapshot -o snapshot-guest.xml -i libvirtxml guest.xml + +This command does not attempt the create the domain locally, which would fail. +Instead it writes updated domain XML to I<snapshot-guest.xml>. The disks in +snapshot-guest.xml point to the newly created snapshot volumes. + +The latter method of import is intended for use when importing a Xen domain from +a origin machine for conversion with L<virt-v2v(1)>. virt-v2v should be given +I<snapshot-guest.xml> as the domain XML. + +=back + =head1 SEE ALSO L<virt-v2v(1)>, -- 1.6.2.5

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