├── README.md
└── create_snapshot.sh


/README.md:
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1 | # openstack-nova-snapshot
2 | Easy OpenStack Nova snapshots from inside instances
3 | 
4 | https://raymii.org/s/tutorials/OpenStack_Quick_and_automatic_instance_snapshot_backups.html
5 | 


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/create_snapshot.sh:
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 1 | #!/bin/bash
 2 | # License: GNU GPLv3
 3 | # Author: Remy van Elst, https://raymii.org
 4 | # Script to create snapshot of Nova Instance (to glance)
 5 | # Place the computerc file in: /root/.openstack_snapshotrc
 6 | 
 7 | # To restore to a new server:
 8 | # nova boot --image "SNAPSHOT_NAME" --poll --flavor "Standard 1" --availability-zone NL1 --nic net-id=00000000-0000-0000-0000-000000000000 --key "SSH_KEY" "VM_NAME"
 9 | # To restore to this server (keep public IP)
10 | # nova rebuild --poll "THIS_INSTANCE_UUID" "SNAPSHOT_IMAGE_UUID"
11 | 
12 | # OpenStack Command Line tools required:
13 | # apt-get install python-novaclient
14 | # apt-get install python-keystoneclient
15 | # apt-get install python-glanceclient
16 | 
17 | # Or for older/other distributions:
18 | # apt-get install python-pip || yum install python-pip
19 | # pip install python-novaclient
20 | # pip install python-keystoneclient
21 | # pip install python-glanceclient
22 | 
23 | # To create a snapshot before an apt-get upgrade:
24 | # Place the following in /etc/apt/apt.conf.d/00glancesnapshot
25 | # DPKG::Pre-Invoke {"/bin/bash /usr/local/bin/glance-image-create.sh";};
26 | 
27 | PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
28 | 
29 | # First we check if all the commands we need are installed.
30 | command_exists() {
31 |   command -v "$1" >/dev/null 2>&1
32 |   if [[ $? -ne 0 ]]; then
33 |     echo "I require $1 but it's not installed. Aborting."
34 |     exit 1
35 |   fi
36 | }
37 | 
38 | for COMMAND in "nova" "glance" "dmidecode" "tr"; do
39 |   command_exists "${COMMAND}"
40 | done
41 | 
42 | # Check if the computerc file exists. If so, assume it has the credentials.
43 | if [[ ! -f "/root/.openstack_snapshotrc" ]]; then
44 |   echo "/root/.openstack_snapshotrc file required."
45 |   exit 1
46 | else
47 |   source "/root/.openstack_snapshotrc"
48 | fi
49 | 
50 | # backup_type
51 | BACKUP_TYPE="${1}"
52 | 
53 | if [[ -z "${BACKUP_TYPE}" ]]; then
54 |   BACKUP_TYPE="manual"
55 | fi
56 | 
57 | # rotation of snapshots
58 | ROTATION="${2}"
59 | 
60 | if [[ -z "${ROTATION}" ]]; then
61 |   ROTATION="7"
62 | fi
63 | 
64 | # The nova UUID is accessible via dmidecode, but it's all caps.
65 | THIS_INSTANCE_UUID="$(dmidecode --string system-uuid | tr '[:upper:]' '[:lower:]')"
66 | 
67 | # snapshot names will sort by date, hostname and UUID.
68 | SNAPSHOT_NAME="backup-snapshot-$(date "+%Y%m%d-%H:%M")-${BACKUP_TYPE}-$(hostname)-${THIS_INSTANCE_UUID}"
69 | 
70 | echo "INFO: Start OpenStack snapshot creation."
71 | 
72 | nova backup "${THIS_INSTANCE_UUID}" "${SNAPSHOT_NAME}" "${BACKUP_TYPE}" "${ROTATION}"
73 | if [[ "$?" != 0 ]]; then
74 |   echo "ERROR: nova image-create \"${THIS_INSTANCE_UUID}\" \"${SNAPSHOT_NAME}\" \"${BACKUP_TYPE}\" \"${ROTATION}\" failed."
75 |   exit 1
76 | else
77 |   echo "SUCCESS: Backup image created and pending upload."
78 | fi
79 | 


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