fuel-octane/deploy/snapshot_fns
Yuriy Taraday 8e995d21ff Add transfer_snapshots method
Change-Id: Ib96f22ee69266b251701aeb194d4fe41ceb3c61d
2015-08-20 15:40:48 +03:00

153 lines
3.8 KiB
Plaintext

# vim syntax=sh
if type zfs > /dev/null 2>&1; then
SNAP_METHOD="zfs"
STATE_PATH="/vms/state"
else
SNAP_METHOD="lvm"
STATE_PATH="/var/lib/libvirt/qemu/save"
fi
lvm_snapshot() {
local volume=$1 snapname=$2
sudo lvcreate -sn $volume-$snapname -l 100%ORIGIN vms/$volume
}
lvm_revert() {
local volume=$1 snapname=$2
sudo lvconvert --merge vms/$volume-$snapname -i 5
sudo lvcreate -sn $volume-$snapname -l 100%ORIGIN vms/$volume # keep snapshot around
}
lvm_discard() {
local volume=$1 snapname=$2
sudo lvremove -f vms/$volume-$snapname
}
zfs_snapshot() {
local volume=$1 snapname=$2
sudo zfs snapshot vms/$volume@$snapname
sudo zfs clone vms/$volume@$snapname vms/$volume-$snapname
sudo zfs promote vms/$volume-$snapname
}
zfs_revert() {
local volume=$1 snapname=$2
sudo zfs destroy vms/$volume
sudo zfs clone vms/$volume-$snapname@$snapname vms/$volume
}
zfs_discard() {
local volume=$1 snapname=$2
clones="$(sudo zfs get -H clones vms/$volume-$snapname@$snapname | cut -f3)"
case $clones in
"" )
sudo zfs destroy vms/$volume-$snapname@$snapname
sudo zfs destroy vms/$volume-$snapname
;;
vms/$volume )
sudo zfs promote vms/$volume
sudo zfs destroy vms/$volume-$snapname
sudo zfs destroy vms/$volume@$snapname
;;
* )
echo "Can't remove snapshot vms/$volume-$snapname@$snapname since it has clones: $clones"
esac
}
virsh_all() {
local action=$1
shift
echo "$@" | xargs -P0 -n1 virsh $action | sed -n '/./p'
}
snapshot_vms() {
local snapname=$1 domain snap_arg
shift
sudo mkdir -p "$STATE_PATH"
sudo chown libvirt-qemu:kvm "$STATE_PATH"
virsh_all suspend "$@"
for domain; do
${SNAP_METHOD}_snapshot $domain $snapname
snap_arg=""
case $domain in
fuel )
snap_arg="--diskspec hdb,snapshot=no"
;;
compute-* )
snap_arg="--diskspec hdb,snapshot=no"
${SNAP_METHOD}_snapshot $domain-ceph $snapname
;;
esac
virsh snapshot-create-as $domain $domain-$snapname --atomic --memspec "$STATE_PATH/$domain-$snapname" --diskspec hda,snapshot=no $snap_arg
done
virsh_all resume "$@"
}
revert_vms() {
local snapname=$1 domain
shift
virsh_all destroy "$@"
for domain; do
${SNAP_METHOD}_revert $domain $snapname
case $domain in
compute-* )
${SNAP_METHOD}_revert $domain-ceph $snapname
;;
esac
virsh restore "$STATE_PATH/$domain-$snapname" --paused
done
virsh_all resume "$@"
}
discard_snapshots() {
local snapname=$1 domain
shift
for domain; do
${SNAP_METHOD}_discard $domain $snapname
case $domain in
compute-* )
${SNAP_METHOD}_discard $domain-ceph $snapname
;;
esac
virsh snapshot-delete $domain $domain-$snapname --metadata
sudo rm -f "$STATE_PATH/$domain-$snapname"
done
}
zfs_transfer() {
local volume=$1 snapname=$2 target=$3
local dataset="vms/$volume-$snapname@$snapname"
sudo zfs send "$dataset" | pv -cN $domain -s "$(sudo zfs list -Hp "$dataset" | cut -f4)" | ssh $target sudo zfs recv -vd vms
}
transfer_snapshots() {
local snapname=$1 target=$2 domain
shift; shift
if [ "$SNAP_METHOD" != "zfs" ]; then
echo "Can transfer only ZFS snapshots"
return 1
fi
if ! type pv > /dev/null 2>&1; then
sudo apt-get install -y pv
fi
if ! ssh -o KbdInteractiveAuthentication=no $target true; then
echo "Please set up passwordless SSH to node $target"
return 1
fi
if ! ssh $target sudo -nv 2> /dev/null; then
echo "Please set up passwordless sudo on node $target"
return 1
fi
ssh $target sudo mkdir -p "$STATE_PATH"
for domain; do
${SNAP_METHOD}_transfer $domain $snapname $target
case $domain in
compute-* )
${SNAP_METHOD}_transfer $domain-ceph $snapname $target
;;
esac
local state_file="$STATE_PATH/$domain-$snapname"
sudo pv "$state_file" | ssh $target sudo "sh -c \"cat > \\\"$state_file\\\"\""
done
}