X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/41d20beeb645b9bab9a89de1644e4d28b91a0eae..9c43eb0ce717d7aa74c2b240d0441a0765756db0:/blog/archive/2010/11/index.html diff --git a/blog/archive/2010/11/index.html b/blog/archive/2010/11/index.html index eabd92132f..b85869e651 100644 --- a/blog/archive/2010/11/index.html +++ b/blog/archive/2010/11/index.html @@ -701,6 +701,708 @@ Installed using apt-get, removed with aptitude
+
+
+ Migrating Xen virtual machines using LVM to KVM using disk images +
+
+ 2010-11-22 11:20 +
+ +
+ +

Most of the computers in use by the +Debian Edu/Skolelinux project +are virtual machines. And they have been Xen machines running on a +fairly old IBM eserver xseries 345 machine, and we wanted to migrate +them to KVM on a newer Dell PowerEdge 2950 host machine. This was a +bit harder that it could have been, because we set up the Xen virtual +machines to get the virtual partitions from LVM, which as far as I +know is not supported by KVM. So to migrate, we had to convert +several LVM logical volumes to partitions on a virtual disk file.

+ +

I found +a +nice recipe to do this, and wrote the following script to do the +migration. It uses qemu-img from the qemu package to make the disk +image, parted to partition it, losetup and kpartx to present the disk +image partions as devices, and dd to copy the data. I NFS mounted the +new servers storage area on the old server to do the migration.

+ +
+#!/bin/sh
+
+# Based on
+# http://searchnetworking.techtarget.com.au/articles/35011-Six-steps-for-migrating-Xen-virtual-machines-to-KVM
+
+set -e
+set -x
+
+if [ -z "$1" ] ; then
+    echo "Usage: $0 <hostname>"
+    exit 1
+else
+    host="$1"
+fi
+
+if [ ! -e /dev/vg_data/$host-disk ] ; then
+    echo "error: unable to find LVM volume for $host"
+    exit 1
+fi
+
+# Partitions need to be a bit bigger than the LVM LVs.  not sure why.
+disksize=$( lvs --units m | grep $host-disk | awk '{sum = sum + $4} END { print int(sum * 1.05) }')
+swapsize=$( lvs --units m | grep $host-swap | awk '{sum = sum + $4} END { print int(sum * 1.05) }')
+totalsize=$(( ( $disksize + $swapsize ) ))
+
+img=$host.img
+#dd if=/dev/zero of=$img bs=1M count=$(( $disksize + $swapsize ))
+qemu-img create $img ${totalsize}MMaking room on the Debian Edu/Sqeeze DVD
+
+parted $img mklabel msdos
+parted $img mkpart primary linux-swap 0 $disksize
+parted $img mkpart primary ext2 $disksize $totalsize
+parted $img set 1 boot on
+
+modprobe dm-mod
+losetup /dev/loop0 $img
+kpartx -a /dev/loop0
+
+dd if=/dev/vg_data/$host-disk of=/dev/mapper/loop0p1 bs=1M
+fsck.ext3 -f /dev/mapper/loop0p1 || true
+mkswap /dev/mapper/loop0p2
+
+kpartx -d /dev/loop0
+losetup -d /dev/loop0
+
+ +

The script is perhaps so simple that it is not copyrightable, but +if it is, it is licenced using GPL v2 or later at your discretion.

+ +

After doing this, I booted a Debian CD in rescue mode in KVM with +the new disk image attached, installed grub-pc and linux-image-686 and +set up grub to boot from the disk image. After this, the KVM machines +seem to work just fine.

+ +
+
+ + + + Tags: debian, debian edu, english. + +
+
+
+ +
+
+ Lenny->Squeeze upgrades of the Gnome and KDE desktop, now with apt-get autoremove +
+
+ 2010-11-22 14:15 +
+ +
+ +

Michael Biebl suggested to me on IRC, that I changed my automated +upgrade testing of the +Lenny +Gnome and KDE Desktop to do apt-get autoremove when using apt-get. +This seem like a very good idea, so I adjusted by test scripts and +can now present the updated result from today:

+ +

This is for Gnome:

+ +

Installed using apt-get, missing with aptitude

+ +

+ apache2.2-bin + aptdaemon + baobab + binfmt-support + browser-plugin-gnash + cheese-common + cli-common + cups-pk-helper + dmz-cursor-theme + empathy + empathy-common + freedesktop-sound-theme + freeglut3 + gconf-defaults-service + gdm-themes + gedit-plugins + geoclue + geoclue-hostip + geoclue-localnet + geoclue-manual + geoclue-yahoo + gnash + gnash-common + gnome + gnome-backgrounds + gnome-cards-data + gnome-codec-install + gnome-core + gnome-desktop-environment + gnome-disk-utility + gnome-screenshot + gnome-search-tool + gnome-session-canberra + gnome-system-log + gnome-themes-extras + gnome-themes-more + gnome-user-share + gstreamer0.10-fluendo-mp3 + gstreamer0.10-tools + gtk2-engines + gtk2-engines-pixbuf + gtk2-engines-smooth + hamster-applet + libapache2-mod-dnssd + libapr1 + libaprutil1 + libaprutil1-dbd-sqlite3 + libaprutil1-ldap + libart2.0-cil + libboost-date-time1.42.0 + libboost-python1.42.0 + libboost-thread1.42.0 + libchamplain-0.4-0 + libchamplain-gtk-0.4-0 + libcheese-gtk18 + libclutter-gtk-0.10-0 + libcryptui0 + libdiscid0 + libelf1 + libepc-1.0-2 + libepc-common + libepc-ui-1.0-2 + libfreerdp-plugins-standard + libfreerdp0 + libgconf2.0-cil + libgdata-common + libgdata7 + libgdu-gtk0 + libgee2 + libgeoclue0 + libgexiv2-0 + libgif4 + libglade2.0-cil + libglib2.0-cil + libgmime2.4-cil + libgnome-vfs2.0-cil + libgnome2.24-cil + libgnomepanel2.24-cil + libgpod-common + libgpod4 + libgtk2.0-cil + libgtkglext1 + libgtksourceview2.0-common + libmono-addins-gui0.2-cil + libmono-addins0.2-cil + libmono-cairo2.0-cil + libmono-corlib2.0-cil + libmono-i18n-west2.0-cil + libmono-posix2.0-cil + libmono-security2.0-cil + libmono-sharpzip2.84-cil + libmono-system2.0-cil + libmtp8 + libmusicbrainz3-6 + libndesk-dbus-glib1.0-cil + libndesk-dbus1.0-cil + libopal3.6.8 + libpolkit-gtk-1-0 + libpt2.6.7 + libpython2.6 + librpm1 + librpmio1 + libsdl1.2debian + libsrtp0 + libssh-4 + libtelepathy-farsight0 + libtelepathy-glib0 + libtidy-0.99-0 + media-player-info + mesa-utils + mono-2.0-gac + mono-gac + mono-runtime + nautilus-sendto + nautilus-sendto-empathy + p7zip-full + pkg-config + python-aptdaemon + python-aptdaemon-gtk + python-axiom + python-beautifulsoup + python-bugbuddy + python-clientform + python-coherence + python-configobj + python-crypto + python-cupshelpers + python-elementtree + python-epsilon + python-evolution + python-feedparser + python-gdata + python-gdbm + python-gst0.10 + python-gtkglext1 + python-gtksourceview2 + python-httplib2 + python-louie + python-mako + python-markupsafe + python-mechanize + python-nevow + python-notify + python-opengl + python-openssl + python-pam + python-pkg-resources + python-pyasn1 + python-pysqlite2 + python-rdflib + python-serial + python-tagpy + python-twisted-bin + python-twisted-conch + python-twisted-core + python-twisted-web + python-utidylib + python-webkit + python-xdg + python-zope.interface + remmina + remmina-plugin-data + remmina-plugin-rdp + remmina-plugin-vnc + rhythmbox-plugin-cdrecorder + rhythmbox-plugins + rpm-common + rpm2cpio + seahorse-plugins + shotwell + software-center + system-config-printer-udev + telepathy-gabble + telepathy-mission-control-5 + telepathy-salut + tomboy + totem + totem-coherence + totem-mozilla + totem-plugins + transmission-common + xdg-user-dirs + xdg-user-dirs-gtk + xserver-xephyr +

+ +

Installed using apt-get, removed with aptitude

+ +

+ cheese + ekiga + eog + epiphany-extensions + evolution-exchange + fast-user-switch-applet + file-roller + gcalctool + gconf-editor + gdm + gedit + gedit-common + gnome-games + gnome-games-data + gnome-nettool + gnome-system-tools + gnome-themes + gnuchess + gucharmap + guile-1.8-libs + libavahi-ui0 + libdmx1 + libgalago3 + libgtk-vnc-1.0-0 + libgtksourceview2.0-0 + liblircclient0 + libsdl1.2debian-alsa + libspeexdsp1 + libsvga1 + rhythmbox + seahorse + sound-juicer + system-config-printer + totem-common + transmission-gtk + vinagre + vino +

+ +

Installed using aptitude, missing with apt-get

+ +

+ gstreamer0.10-gnomevfs +

+ +

Installed using aptitude, removed with apt-get

+ +

+[nothing] +

+ +

This is for KDE:

+ +

Installed using apt-get, missing with aptitude

+ +

+ ksmserver +

+ +

Installed using apt-get, removed with aptitude

+ +

+ kwin + network-manager-kde +

+ +

Installed using aptitude, missing with apt-get

+ +

+ arts + dolphin + freespacenotifier + google-gadgets-gst + google-gadgets-xul + kappfinder + kcalc + kcharselect + kde-core + kde-plasma-desktop + kde-standard + kde-window-manager + kdeartwork + kdeartwork-emoticons + kdeartwork-style + kdeartwork-theme-icon + kdebase + kdebase-apps + kdebase-workspace + kdebase-workspace-bin + kdebase-workspace-data + kdeeject + kdelibs + kdeplasma-addons + kdeutils + kdewallpapers + kdf + kfloppy + kgpg + khelpcenter4 + kinfocenter + konq-plugins-l10n + konqueror-nsplugins + kscreensaver + kscreensaver-xsavers + ktimer + kwrite + libgle3 + libkde4-ruby1.8 + libkonq5 + libkonq5-templates + libnetpbm10 + libplasma-ruby + libplasma-ruby1.8 + libqt4-ruby1.8 + marble-data + marble-plugins + netpbm + nuvola-icon-theme + plasma-dataengines-workspace + plasma-desktop + plasma-desktopthemes-artwork + plasma-runners-addons + plasma-scriptengine-googlegadgets + plasma-scriptengine-python + plasma-scriptengine-qedje + plasma-scriptengine-ruby + plasma-scriptengine-webkit + plasma-scriptengines + plasma-wallpapers-addons + plasma-widget-folderview + plasma-widget-networkmanagement + ruby + sweeper + update-notifier-kde + xscreensaver-data-extra + xscreensaver-gl + xscreensaver-gl-extra + xscreensaver-screensaver-bsod +

+ +

Installed using aptitude, removed with apt-get

+ +

+ ark + google-gadgets-common + google-gadgets-qt + htdig + kate + kdebase-bin + kdebase-data + kdepasswd + kfind + klipper + konq-plugins + konqueror + ksysguard + ksysguardd + libarchive1 + libcln6 + libeet1 + libeina-svn-06 + libggadget-1.0-0b + libggadget-qt-1.0-0b + libgps19 + libkdecorations4 + libkephal4 + libkonq4 + libkonqsidebarplugin4a + libkscreensaver5 + libksgrd4 + libksignalplotter4 + libkunitconversion4 + libkwineffects1a + libmarblewidget4 + libntrack-qt4-1 + libntrack0 + libplasma-geolocation-interface4 + libplasmaclock4a + libplasmagenericshell4 + libprocesscore4a + libprocessui4a + libqalculate5 + libqedje0a + libqtruby4shared2 + libqzion0a + libruby1.8 + libscim8c2a + libsmokekdecore4-3 + libsmokekdeui4-3 + libsmokekfile3 + libsmokekhtml3 + libsmokekio3 + libsmokeknewstuff2-3 + libsmokeknewstuff3-3 + libsmokekparts3 + libsmokektexteditor3 + libsmokekutils3 + libsmokenepomuk3 + libsmokephonon3 + libsmokeplasma3 + libsmokeqtcore4-3 + libsmokeqtdbus4-3 + libsmokeqtgui4-3 + libsmokeqtnetwork4-3 + libsmokeqtopengl4-3 + libsmokeqtscript4-3 + libsmokeqtsql4-3 + libsmokeqtsvg4-3 + libsmokeqttest4-3 + libsmokeqtuitools4-3 + libsmokeqtwebkit4-3 + libsmokeqtxml4-3 + libsmokesolid3 + libsmokesoprano3 + libtaskmanager4a + libtidy-0.99-0 + libweather-ion4a + libxklavier16 + libxxf86misc1 + okteta + oxygencursors + plasma-dataengines-addons + plasma-scriptengine-superkaramba + plasma-widget-lancelot + plasma-widgets-addons + plasma-widgets-workspace + polkit-kde-1 + ruby1.8 + systemsettings + update-notifier-common +

+ +

Running apt-get autoremove made the results using apt-get and +aptitude a bit more similar, but there are still quite a lott of +differences. I have no idea what packages should be installed after +the upgrade, but hope those that do can have a look.

+ +
+
+ + + + Tags: debian, debian edu, english. + +
+
+
+ +
+
+ DND hedrer overvåkning av barn med Rosingsprisen +
+
+ 2010-11-23 14:15 +
+ +
+ +

Jeg registrerer med vond smak i munnen at Den Norske Dataforening +hedrer +overvåkning av barn med Rosingsprisen for kreativitet i år. Jeg +er glad jeg nå er meldt ut av DND.

+ +

Å elektronisk overvåke sine barn er ikke å gjøre dem en tjeneste, +men et overgrep mot individer i utvikling som bør læres opp til å ta +egne valg.

+ +

For å sitere Datatilsynets nye leder, Bjørn Erik Thon, i +et intervju +med Computerworld Norge:

+ +

+- For alle som har barn, meg selv inkludert, er førstetanken at det +hadde vært fint å vite hvor barnet sitt er til enhver tid. Men ungene +har ikke godt av det. De er små individer som skal søke rundt og finne +sine små gjemmesteder og utvide horisonten, uten at foreldrene ser dem +i kortene. Det kan være fristende, men jeg ville ikke gått inn i +dette. +

+ +

Det er skremmende å se at DND mener en tjeneste som legger opp til +slike overgrep bør hedres. Å flytte oppveksten for barn inn i en +virtuell +Panopticon er et +grovt overgrep og vil gjøre skade på barnenes utvikling, og foreldre +burde tenke seg godt om før de gir etter for sine instinkter her.

+ +

Blipper-tjenesten får meg til å tenke på bøkene til +John Twelve +Hawks, som forbilledlig beskriver hvordan et totalitært +overvåkningssamfunn bygges sakte men sikkert rundt oss, satt sammen av +gode intensjoner og manglende bevissthet om hvilke prinsipper et +liberalt demokrati er fundamentert på. Jeg har hatt stor glede av å +lese alle de tre bøkene.

+ +
+
+ + + + Tags: norsk, personvern, sikkerhet. + +
+
+
+ +
+
+ Why isn't Debian Edu using VLC? +
+
+ 2010-11-27 11:30 +
+ +
+ +

In the latest issue of Linux Journal, the readers choices were +presented, and the winner among the multimedia player were VLC. +Personally, I like VLC, and it is my player of choice when I first try +to play a video file or stream. Only if VLC fail will I drag out +gmplayer to see if it can do better. The reason is mostly the failure +model and trust. When VLC fail, it normally pop up a error message +reporting the problem. When mplayer fail, it normally segfault or +just hangs. The latter failure mode drain my trust in the program.

+ +

But even if VLC is my player of choice, we have choosen to use +mplayer in Debian +Edu/Skolelinux. The reason is simple. We need a good browser +plugin to play web videos seamlessly, and the VLC browser plugin is +not very good. For example, it lack in-line control buttons, so there +is no way for the user to pause the video. Also, when I +last +tested the browser plugins available in Debian, the VLC plugin +failed on several video pages where mplayer based plugins worked. If +the browser plugin for VLC was as good as the gecko-mediaplayer +package (which uses mplayer), we would switch.

+ +

While VLC is a good player, its user interface is slightly +annoying. The most annoying feature is its inconsistent use of +keyboard shortcuts. When the player is in full screen mode, its +shortcuts are different from when it is playing the video in a window. +For example, space only work as pause when in full screen mode. I +wish it had consisten shortcuts and that space also would work when in +window mode. Another nice shortcut in gmplayer is [enter] to restart +the current video. It is very nice when playing short videos from the +web and want to restart it when new people arrive to have a look at +what is going on.

+ +
+
+ + + + Tags: debian, debian edu, english, multimedia, video, web. + +
+
+
+ +
+
+ Debian Edu development gathering and General Assembly for FRiSK +
+
+ 2010-11-29 18:40 +
+ +
+ +

On friday, the first Debian Edu / Skolelinux +development +gathering in a long time take place here in Oslo, Norway. I +really look forward to seeing all the good people working on the +Squeeze release. The gathering is open for everyone interested in +learning more about Debian Edu / Skolelinux.

+ +

On Saturday, the Norwegian member organization taking care of +organizing these development gatherings, Fri Programvare i Skolen, +will hold its +General Assembly +for 2010. Membership is open for all, and currently there are 388 +people registered as members. Last year 32 members cast their vote in +the memberdb based election system. I hope more people find time to +vote this year.

+ +
+
+ + + + Tags: debian edu, english, nuug. + +
+
+
+

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