diff options
Diffstat (limited to 'deploy/adapters/cobbler/snippets/keep_files')
| -rw-r--r-- | deploy/adapters/cobbler/snippets/keep_files | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/deploy/adapters/cobbler/snippets/keep_files b/deploy/adapters/cobbler/snippets/keep_files new file mode 100644 index 00000000..65214377 --- /dev/null +++ b/deploy/adapters/cobbler/snippets/keep_files @@ -0,0 +1,154 @@ +## This snippet preserves files during re-build.
+## It supersedes other similar snippets - keep_*_keys.
+## Put it in %pre section of the kickstart template file
+## It uses preserve_files field which should contain a list of items to preserve
+## This field for now could contain any of the following:
+## 'ssh', 'cfengine', 'rhn' in any order
+## 'rhn' part of this snippet should NOT be used with systems subscribed
+## to Red Hat Satellite Server or Spacewalk as these
+## have a concept of "reactivation keys" to keep the systems
+## appearing to be the same. Also do not use if changing
+## base channels, i.e. RHEL4 -> RHEL5 upgrades.
+##
+
+#if $getVar('$preserve_files','') != ''
+ #set $preserve_files = $getVar('$preserve_files','')
+ preserve_files = $preserve_files
+
+#raw
+# Nifty trick to restore keys without using a nochroot %post
+
+echo "Saving keys..." > /dev/ttyS0
+
+insmod /lib/jbd.o
+insmod /lib/ext3.o
+
+function findkeys
+{
+ for disk in $DISKS; do
+ name=$(basename $disk)
+ tmpdir=$(mktemp -d $name.XXXXXX)
+ mkdir -p /tmp/$tmpdir
+ mount $disk /tmp/$tmpdir
+ if [ $? -ne 0 ]; then # Skip to the next partition if the mount fails
+ rm -rf /tmp/$tmpdir
+ continue
+ fi
+ # Copy current host keys out to be reused
+ if [ -d /tmp/$tmpdir$SEARCHDIR ] && cp -a /tmp/$tmpdir$SEARCHDIR/${PATTERN}* /tmp/$TEMPDIR; then
+ keys_found="yes"
+ umount /tmp/$tmpdir
+ rm -r /tmp/$tmpdir
+ break
+ elif [ -n "$SHORTDIR" ] && [ -d /tmp/$tmpdir$SHORTDIR ] && cp -a /tmp/$tmpdir$SHORTDIR/${PATTERN}* /tmp/$TEMPDIR; then
+ keys_found="yes"
+ umount /tmp/$tmpdir
+ rm -r /tmp/$tmpdir
+ break
+ fi
+ umount /tmp/$tmpdir
+ rm -r /tmp/$tmpdir
+ done
+}
+
+function search_for_keys
+{
+
+ SEARCHDIR=$1
+ TEMPDIR=$2
+ PATTERN=$3
+
+ keys_found=no
+ # /var could be a separate partition
+ SHORTDIR=${SEARCHDIR#/var}
+ if [ $SHORTDIR = $SEARCHDIR ]; then
+ SHORTDIR=''
+ fi
+
+ mkdir -p /tmp/$TEMPDIR
+
+ DISKS=$(awk '{if ($NF ~ "^[a-zA-Z].*[0-9]$" && $NF !~ "c[0-9]+d[0-9]+$" && $NF !~ "^loop.*") print "/dev/"$NF}' /proc/partitions)
+ # In the awk line above we want to make list of partitions, but not devices/controllers
+ # cciss raid controllers have partitions like /dev/cciss/cNdMpL, where N,M,L - some digits, we want to make sure 'pL' is there
+ # No need to scan loopback niether.
+ # Try to find the keys on ordinary partitions
+
+ findkeys
+
+ # Try software RAID
+ if [ "$keys_found" = "no" ]; then
+ if mdadm -As; then
+ DISKS=$(awk '/md/{print "/dev/"$1}' /proc/mdstat)
+ findkeys
+ fi
+ fi
+
+
+ # Try LVM if that didn't work
+ if [ "$keys_found" = "no" ]; then
+ lvm lvmdiskscan
+ vgs=$(lvm vgs | tail -n +2 | awk '{ print $1 }')
+ for vg in $vgs; do
+ # Activate any VG we found
+ lvm vgchange -ay $vg
+ done
+
+ DISKS=$(lvm lvs | tail -n +2 | awk '{ print "/dev/" $2 "/" $1 }')
+ findkeys
+
+ # And clean up..
+ for vg in $vgs; do
+ lvm vgchange -an $vg
+ done
+ fi
+}
+
+function restore_keys
+{
+ SEARCHDIR=$1
+ TEMPDIR=$2
+ PATTERN=$3
+ # Loop until the corresponding rpm is installed if the keys are saved
+ if [ "$keys_found" = "yes" ] && [ -f /tmp/$TEMPDIR/${PATTERN}* ]; then
+ while : ; do
+ sleep 10
+ if [ -d /mnt/sysimage$SEARCHDIR ] ; then
+ cp -af /tmp/$TEMPDIR/${PATTERN}* /mnt/sysimage$SEARCHDIR
+ logger "$TEMPDIR keys copied to newly installed system"
+ break
+ fi
+ done &
+ fi
+}
+
+for key in $preserve_files
+do
+ if [ $key = 'ssh' ]; then
+ search_for_keys '/etc/ssh' 'ssh' 'ssh_host_'
+ elif [ $key = 'cfengine' ]; then
+ search_for_keys '/var/cfengine/ppkeys' 'cfengine' 'localhost'
+ elif [ $key = 'rhn' ]; then
+ search_for_keys '/etc/sysconfig/rhn', 'rhn', '*'
+ else
+ echo "No keys to save!" > /dev/ttyS0
+ fi
+done
+
+# now restore keys if found
+
+for key in $preserve_files
+do
+ if [ $key = 'ssh' ]; then
+ restore_keys '/etc/ssh' 'ssh' 'ssh_host_'
+ elif [ $key = 'cfengine' ]; then
+ restore_keys '/var/cfengine/ppkeys' 'cfengine' 'localhost'
+ elif [ $key = 'rhn' ]; then
+ restore_keys '/etc/sysconfig/rhn', 'rhn', '*'
+ else
+ echo "Nothing to restore!" > /dev/ttyS0
+ fi
+done
+
+
+#end raw
+#end if
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