pv-fixup: update for non-clustered operation

[invirt/scripts/pv-fixup.git] / pv-fixup

diff --git a/pv-fixup b/pv-fixup
index 206523f..78a4530 100644 (file)
--- a/pv-fixup
+++ b/pv-fixup
@@ -2,8 +2,8 @@
 exit 1  #Not actually a script.
 
 VG=xenvg
 exit 1  #Not actually a script.
 
 VG=xenvg

-DISK=/dev/sdb
-HALFSIZETiB=2.04
+DISK=/dev/mapper/36090a028407d6e2b2589a45cdb971489
+HALFSIZETiB=5.23

 TMPDM=tmpfoo
 TMPDEV=/dev/mapper/$TMPDM
 TMPDM2=tmpbar
 TMPDM=tmpfoo
 TMPDEV=/dev/mapper/$TMPDM
 TMPDM2=tmpbar

@@ -15,8 +15,8 @@ pvresize --setphysicalvolumesize=${HALFSIZETiB}t $DISK
 
 #  - dmsetup create a device in the latter half
 dmstart=$(python -c "print int(($HALFSIZETiB + 0.01) * 1024 * 1024 * 1024 * 2)")
 
 #  - dmsetup create a device in the latter half
 dmstart=$(python -c "print int(($HALFSIZETiB + 0.01) * 1024 * 1024 * 1024 * 2)")

-dmlen=$(python -c "print int(($HALFSIZETiB - 0.02) * 1024 * 1024 * 1024 * 2)")
-#foreach host:
+dmlen=$(python -c "print int(($HALFSIZETiB - 0.03) * 1024 * 1024 * 1024 * 2)")
+#Foreach host:

 dmsetup create $TMPDM --table "0 $dmlen linear $DISK $dmstart"
 #done
 
 dmsetup create $TMPDM --table "0 $dmlen linear $DISK $dmstart"
 #done
 

@@ -27,34 +27,67 @@ pvcreate $TMPDEV
 vgextend $VG $TMPDEV
 
 #  - pvmove all the LVs to the temporary PV
 vgextend $VG $TMPDEV
 
 #  - pvmove all the LVs to the temporary PV

-#    (something like
-#      for lv in $(LVs for running VMs on this host); do
-#        #some lvchange -a commands
-#        pvmove -n $lv <oldpv> <newpv>
-#        #possibly more lvchange -a to restore old state
-#      done)
+
+yamlkeys () {
+  python -c 'if 1:
+    import yaml, sys
+    mm = yaml.load(sys.stdin.read())
+    for m in sorted(mm.iterkeys()): print m'
+}
+
+lvsleft () {
+  lvs -o name,devices xenvg \
+    | perl -lane "print \$F[0] if (\$F[1] =~ m|$DISK|)"
+}
+
+vmstolvs () {
+  perl -pe 's/^/d_/;s/$/_hda/'
+}
+
+totalsize () {
+  # handy for estimating time; output in GiB; pipe in a list of LVs
+  perl -pe 's.^.xenvg/.' \
+   | xargs lvs -o size --units=g \
+   | perl -lne '$total += $_; END { print $total; }'
+}

 
 movelv () {
   echo pvmoving $1...
 
 movelv () {
   echo pvmoving $1...

-  lvchange -an $1

   pvmove -i 10 -n $1 $2
 }
 
   pvmove -i 10 -n $1 $2
 }
 

-#touch /etc/invirt/nocreate
+ssh root@xvm remctl remote web listvms \
+ | yamlkeys
+ > runningvms
+LVM_SYSTEM_DIR=/root/lvm lvsleft \
+ | grep '^d_.*_hda$' \
+ | grep -v -xf <(vmstolvs <runningvms) \
+ > offvmlvs
+for lv in $(offvmlvs); do
+  LVM_SYSTEM_DIR=/root/lvm movelv $VG/$lv $DISK
+done

 #FOREACH host:
 #FOREACH host:

-#machines=$(invirt-listvms | perl -lne 'print if s/^([^ ]*):.*/$1/')
-#lvs=$(echo $machines | perl -lpe "s|^|$VG/d_|; s|$|_hda|")
-for lv in $(lvs -o lv_name --noheadings $VG); do
-  movelv $VG/$lv $DISK
+for lv in $(invirt-listvms | yamlkeys | vmstolvs); do
+  LVM_SYSTEM_DIR=/root/lvm movelv $VG/$lv $DISK

 done
 #done
 
 done
 #done
 

-# hopefully empty:
-lvs $VG -o lv_name,devices | grep $DISK
-# if not, do some more movelv
+ssh root@xvm remctl remote web listvms \
+ | perl -lne 'print if (s/^  cdrom: //)' \
+ > usedcdroms
+LVM_SYSTEM_DIR=/root/lvm lvsleft \
+ | grep ^image_ \
+ | grep -v -xf <(perl -pe "s|/dev/$VG/||" usedcdroms) \
+ > offcdlvs
+for lv in $(offcdlvs); do
+  LVM_SYSTEM_DIR=/root/lvm movelv $VG/$lv $DISK
+done
+
+# deal with $(cat usedcdroms)
+# deal with s_* LVs
+# deal with any remaining $(lvsleft)

 
 

-# This is possible if some LVs were used on more than one host during
-# migration.
+[ -z $(lvsleft) ]

 
 
 #  - pvremove the old PV
 
 
 #  - pvremove the old PV