December 2006 - Devel - libvirt List Archives

[Libvir] Release of libvirt-0.1.10
by Daniel Veillard 20 Dec '06

20 Dec '06

A couple of bug fixes and significant improvements have accumulated since the last release one month ago, so it's time to push a new one. Available from ftp://libvirt.org/libvirt/ * more localizations * bug fixes: - VCPU info breakages on xen 3.0.3 - xenDaemonListDomains buffer overflow (Daniel Berrange) - reference count bug when creating Xen domains (Daniel Berrange). * improvements: - support graphic framebuffer for Xen paravirt (Daniel Berrange) - VNC listen IP range support (Daniel Berrange) - support for default Xen config files and inactive domains of 3.0.4 (Daniel Berrange). Thanks to Dan and everybody who helped by reporting bugs ! 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] Fix handling of config files with duplicate named guests
by Daniel P. Berrange 19 Dec '06

19 Dec '06

The code for managing config files in /etc/xen assumed that the filename of the config matched the name of the guest defined inside. One might thing this a reasonable assumption, but in the wild I've had reports from users whom have various config files for the same guest, but with different settings. This caused some really wierd behaviour in the current code base. virt-manager display would alternate displaying each config upon refresh! Now, our API requires that there is only one config per name, so we can't expose this to the UI. The attached patch, thus simply detects when we have more than one config with same named guest, and hides the duplicates. The way it does this is to change the way we cache configs. Previously we had a single hash table mapping relative filenames to virConfPtr objects, with the implicit assumption that relative filename == guest name. With the attached patch we now maintain two hash tables. The first maps fully qualified pathnames to virConfPtr objects, the second maps guest names to the first filename found for that name. Thus when querying details for a guest, we first resolve the guest name to its filename, and then lookup the virConfPtr object associated with this filename. This isn't perfect, but its a hell of alot better than current code, so I want to commit it as is and figure out more improvement later. There is no ABI issue here, so we can iterate over impl at will. Regards, Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|

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[Libvir] Still can't run a simple python test libvirt !
by Omer Khalid 19 Dec '06

19 Dec '06

Hi, I am still unable to run my simple libvirt test! I checked out the code from libvirt cvs and following the instructions till 'make install'. It all went well. So then I ran my simply python test, as shown here (http://www.libvirt.org/python.html) It keeps on giving me the following error. [root@lcgctb9 libvirt]# python testLibvirt.py Traceback (most recent call last): File "testLibvirt.py", line 1, in ? import virt ImportError: No module named virt I have verified that the library is linked by the following: [root@lcgctb9 libvirt]# pkg-config libvirt --libs -L/usr/local/lib -lvirt -lxenstore [root@lcgctb9 libvirt]# pkg-config --variable=prefix libvirt /usr/local I really appreciate your help! Regards Omer -- --------------------------------------------------------------- CERN – European Organization for Nuclear Research Information Technology Department CH-1211 Geneva 23 Phone: +41 (0) 22 767 7996 Fax: +41 (0) 22 767 4900 E-mail : Omer.Khalid(a)cern.ch Homepage: http://cern.ch/Omer.Khalid

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[Libvir] [PATCH] Inactive domain management for Xen 3.0.4
by Daniel P. Berrange 13 Dec '06

13 Dec '06

So, my previous set of patches for inactive domain management deal with the problem for Xen 3.0.3 or earlier. In 3.0.4 we now have lifecycle management support, which means we no longer need to scan /etc/xen config files if running against a new XenD. We choose between Xend & scanning /etc/xen files based on the condition 'xendConfigVersion >= 3'. The attached patch adds 5 new entry points to xend_internal.c xenDaemonListDefinedDomains xenDaemonNumOfDefinedDomains xenDaemonDomainCreate xenDaemonDomainDefineXML xenDaemonDomainUndefine These let you enumerate inactive domains, define new ones, delete old ones. Secondly, the patch modifies a number of existing methods to work against inactive domains too. Previously they'd unconditionally pass if the domain id was < 0. Now, if xendConfigVersion is >= 3, then they will know that XenD supports inactive domains & thus work for inactive guests too. xenDaemonDomainGetMaxMemory xenDaemonDomainSetMaxMemory xenDaemonDomainSetMemory xenDaemonDomainGetInfo xenDaemonDomainSetVcpus xenDaemonDomainDumpXML The methods for setting mem,max memory & vcpu count all required further bug fixes to Xend which have been sent upstream & hopefully merged soon. Finally, the patch changes the xendConfigVersion to be lookedup just once when initially connecting to XenD. Since we need this version info very frequently now, it was causing too much unnneccessary overload calling it every time. internal.h | 1 xend_internal.c | 270 +++++++++++++++++++++++++++++++++++++++++++++----------- xend_internal.h | 8 + xm_internal.c | 9 - 4 files changed, 227 insertions(+), 61 deletions(-) Regards, Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|

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[Libvir] Libvirt Build problems
by Omer Khalid 13 Dec '06

13 Dec '06

Hi, I am trying to build libvirt on SL4 (kernal = 2.6.12.6-xen3_12.1_rhel4.1). I tried both snapshot tar ball and the cvs checked out version. With the tar ball, after running the ./configure script, make file is created. But make file fails and complains the following: libvirt.c:24:16: xs.h: No such file or directory In file included from libvirt.c:28: xen_internal.h:15:26: xen/dom0_ops.h: No such file or directory make[2]: *** [libvirt.lo] Error 1 make[2]: Leaving directory `/root/virtualization/libvirt2/libvirt-0.1.9/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/root/virtualization/libvirt2/libvirt-0.1.9' make: *** [all] Error 2 While with the cvs version, the script ./autogen.sh fails to create a make file. I am running Python 2.3.4 and gcc version 3.4.6 20060404 (Red Hat 3.4.6-3). Any help would be much appreciated. Best Regards Omer -- --------------------------------------------------------------- CERN – European Organization for Nuclear Research Information Technology Department CH-1211 Geneva 23 Phone: +41 (0) 22 767 7996 Fax: +41 (0) 22 767 4900 E-mail : Omer.Khalid(a)cern.ch

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[Libvir] Update XML -> SEXPR conversion for new PVFB syntax
by Daniel P. Berrange 13 Dec '06

13 Dec '06

Previously I sent a patch to handle parsing of the new PVFB syntax. This patch provides the counterpart - generating the new syntax when creating paravirt guests. We only enable the new style syntax if using xendConfigVersion 3 or later (ie, 3.0.4), and only for PV guests. HVM and older PV guests still use old style syntax. In this I also added support for vnclisten & vncpasswd parameters mapped to the 'listen' and 'passwd' attributes on the XML <graphics> tag. Regards, Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|

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[Libvir] [PATCH] Support parsing of new SEXPR for PVFB
by Daniel P. Berrange 05 Dec '06

05 Dec '06

The paravirt framebuffer patches for Xen finally got merged into upstream xen-devel. In doing so, however, the syntax of the SEXPR for configuring them changed completely. The existing framebuffer suppoirt in libvirt thus only works with the 3.0.3 tree + PVFB patches. For 3.0.4 we need to work with the new scheme. Fortunately, in 3.0.4 the xend_config_version flag is bumped from 2 -> 3, so we have an easy value to hook off. The attached patch thus adds support for parsing an SEXPR looking like (device (vfb (vncunused 1) (vnclisten 127.0.0.1) (vncpasswd 123456) (type vnc) ) ) And generating the <graphics type='vnc' port='5903'/> XML tag to match. (A later patch will add support for the reverse direction) Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|

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