added script for reverting an instance from a snapshot, first version

2 files changed, 124 insertions, 0 deletions

diff --git a/example/revert_instance_from_snapshot.log b/example/revert_instance_from_snapshot.log
new file mode 100644
index 0000000..b1bf7ff
--- /dev/null
+++ b/example/revert_instance_from_snapshot.log
@@ -0,0 +1,34 @@
+time ./revert_instance_from_snapshot.sh -i snapshot_test -s snap1       
+
+Querying snapshot_test...
+Floating IPs:  192.168.11.7  192.168.11.8                 
+Removing floating ip 192.168.11.7 from snapshot_test
+Re-allocating 192.168.11.7 to the floating-ip pool
++--------------+-------------+----------+------+
+| Ip           | Instance Id | Fixed Ip | Pool |
++--------------+-------------+----------+------+
+| 192.168.11.7 | None        | None     | nova |
++--------------+-------------+----------+------+
+Removing floating ip 192.168.11.8 from snapshot_test
+Re-allocating 192.168.11.8 to the floating-ip pool
++--------------+-------------+----------+------+
+| Ip           | Instance Id | Fixed Ip | Pool |
++--------------+-------------+----------+------+
+| 192.168.11.8 | None        | None     | nova |
++--------------+-------------+----------+------+
+deleting snapshot_test
+booting snapshot_test from snapshot 
+New ID for instance snapshot_test: 61722460-b18c-47dd-b20c-65bb62c01341
+Adding floating ip 192.168.11.7 to 61722460-b18c-47dd-b20c-65bb62c01341
+Adding floating ip 192.168.11.8 to 61722460-b18c-47dd-b20c-65bb62c01341
++--------------------------------------+---------------+--------+--------------------------------------------------+
+| ID                                   | Name          | Status | Networks                                         |
++--------------------------------------+---------------+--------+--------------------------------------------------+
+| 61722460-b18c-47dd-b20c-65bb62c01341 | snapshot_test | BUILD  | private=192.168.10.2, 192.168.11.7, 192.168.11.8 |
+| c522f43d-f9da-422e-bd53-821a1595fb28 | snapshot_test | ACTIVE | private=192.168.10.2                             |
++--------------------------------------+---------------+--------+--------------------------------------------------+
+
+Hang on and wait for the new instance (ID 61722460-b18c-47dd-b20c-65bb62c01341) to finish building before you try to login !
+
+./revert_instance_from_snapshot.sh -i snapshot_test -s snap1  4.16s user 0.93s system 12% cpu 42.394 total
+
diff --git a/revert_instance_from_snapshot.sh b/revert_instance_from_snapshot.sh
new file mode 100755
index 0000000..b8beb3e
--- /dev/null
+++ b/revert_instance_from_snapshot.sh
@@ -0,0 +1,90 @@
+#!/bin/bash
+
+flavor='m1.small'
+secgroup='Bitmask'
+keyname='varac'
+
+
+usage()
+{
+cat << EOF
+usage: $0 options
+
+This script reverts an openstack instance to it's snapshot.
+
+OPTIONS:
+ -h             Show this message
+ -i <instance>   
+ -s <snapshot>
+ -v             verbose mode
+EOF
+}
+
+set -- $(getopt hi:s:v "$@")
+while [ $# -gt 0 ]
+do
+    case "$1" in
+    (-h) usage; exit 1 ;;
+    (-i) instance="$2"; shift;;
+    (-s) snapshot="$2"; shift;;
+    (--) shift; break;;
+    (-*) echo "$0: error - unrecognized option $1" 1>&2; exit 1;;
+    (*)  break;;
+    esac
+    shift
+done
+
+if [[ -z $instance ]] || [[ -z $snapshot ]] 
+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"
+result=`nova boot --image $snapshot --flavor $flavor --security-groups $secgroup --key_name $keyname $instance`
+
+# unfortunatly unformatted
+#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 !"
+