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#!/bin/bash
#
# following prerequisites are needed
# * all ssh-keys specified with the -k option must
# be present to current user (use add_keys script to import)
# Todo: How can we add more than one sshkey with the nova cli ?
# 2 cpus, 10gb disk, 1024 ram
flavor='Medium'
secgroup='Bitmask'
usage()
{
cat << EOF
usage: $0 options
This script reverts an openstack instance to it's snapshot.
mandatory:
-i <instance>
-s <snapshot>
-k <keyname> add sshkey
optional:
-f <flavor> defaults to "$flavor"
-g <secgroup> defaults to "$secgroup"
-h Show this message
-v verbose mode
example:
./revert_instance_from_snapshot.sh -i resettest.testing.bitmask.net -s resettest-firstboot -k varac
EOF
}
set -- $(getopt hi:s:k:f:g:v "$@")
while [ $# -gt 0 ]
do
case "$1" in
(-h) usage; exit 1 ;;
(-i) instance="$2"; shift;;
(-s) snapshot="$2"; shift;;
(-k) key="$2"; shift;;
(-f) flavor="$2"; shift;;
(-g) secgroup="$2"; shift;;
(--) shift; break;;
(-*) echo "$0: error - unrecognized option $1" 1>&2; exit 1;;
(*) break;;
esac
shift
done
if [[ -z $instance ]] || [[ -z $snapshot ]] || [[ -z $key ]]
then
usage
exit 1
fi
echo "Querying $instance..."
ips=`nova show --minimal $instance | grep 'private network'| cut -f 3 -d'|'`
# 192.168.10.2, 192.168.11.7, 192.168.11.9
float_ips=`echo "$ips"| cut -f 2- -d',' | sed 's/,/ /g'`
# 192.168.11.7 192.168.11.9
echo "Floating IPs: $float_ips"
for ip in $float_ips
do
echo "Removing floating ip $ip from $instance"
nova floating-ip-delete $ip
# will re-allocate the removed ip in the pool
echo "Re-allocating $ip to the floating-ip pool"
nova floating-ip-create > /dev/null
done
echo
echo "Deleting $instance"
nova delete $instance
echo
echo "Booting $instance from snapshot $snap with boot cmd:"
boot_cmd="nova boot --image $snapshot --flavor $flavor --security-groups $secgroup --key_name $key $instance"
echo $boot_cmd
result=`$boot_cmd`
# unfortunatly unformatted
#echo $result > /tmp/result
echo $result
newid=`echo "$result" | grep '| id ' | cut -d '|' -f 3 | sed 's/ //g' `
echo
echo "New ID for instance $instance: $newid"
for ip in $float_ips
do
echo "Adding floating ip $ip to $newid"
nova add-floating-ip $newid $ip
done
nova list
echo
echo "Hang on and wait for the new instance (ID $newid) to finish building before you try to login !"
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