let an f12 box create a vserver with an older rpm release, like f8, f10 or centos5

diff --git a/vbuild-init-vserver.sh b/vbuild-init-vserver.sh
index 64ed84c..7e92353 100755 (executable)
--- a/vbuild-init-vserver.sh
+++ b/vbuild-init-vserver.sh
@@ -187,8 +187,32 @@ function setup_vserver () {
     # redirect out/err to protect against the vserver's init sequence getting stalled 
     # mostly used for f10 vservers created remotely through ssh
     $personality vserver $VERBOSE $vserver start >& /dev/null
-    [ "$pkg_method" = "yum" ] && $personality vserver $VERBOSE $vserver exec sh -c "rm -f /var/lib/rpm/__db*"
-    [ "$pkg_method" = "yum" ] && $personality vserver $VERBOSE $vserver exec rpm --rebuilddb
+
+    if [ "$pkg_method" == "yum" ] ; then
+       $personality vserver $VERBOSE $vserver exec sh -c "rm -f /var/lib/rpm/__db*"
+
+       # run the host rpmdb_dump and restore with the guest rpmdb_load
+       function translate_rpm_hashes () {
+           set -x
+           set -e
+           local vserver="$1"; shift
+           # need to have utilities installed
+           type -p file
+           type -p awk
+           type -p cut
+           guest_dir=/var/lib/rpm
+           host_dir=/vservers/$vserver/$guest_dir
+           files=$(cd $host_dir ; file * | grep Hash | cut -d: -f 1)
+           for file in $files; do
+               (cd $host_dir && mv $file ${file}-foreign)
+               /usr/lib/rpm/rpmdb_dump $host_dir/${file}-foreign | vserver $VERBOSE $vserver exec /usr/lib/rpm/rpmdb_load $guest_dir/$file
+           done
+           return 0
+       }
+
+       # try the simple way, if that fails try to cross fix the rpm hashes
+       $personality vserver $VERBOSE $vserver exec rpm --rebuilddb || translate_rpm_hashes $vserver
+    fi
 
     # check if the vserver kernel is using VSERVER_DEVICE (vdevmap) support
     need_vdevmap=$(grep "CONFIG_VSERVER_DEVICE=y" /boot/config-$(uname -r) | wc -l)