OpenStack automatic instances & volumes snapshots

Nova, OpenStack compute service is used for hosting and managing cloud computing systems.

Below we gonna see how to automate the backups of your volumes & instances

cf. tutorial https://raymii.org/s/tutorials/OpenStack_Quick_and_automatic_instance_snapshot_backups.html

Dependencies

OpenStack Command lines tools

The script requires to have the command line tools dmidecode, wget & python-pip

# Ubuntu/Debian
apt-get install dmidecode wget python-pip
# CentOS
yum install dmidecode wget python-pip

Recent Ubuntu/Debian releases have the OpenStack command line tools packaged

apt-get install python-keystoneclient python-glanceclient python-novaclient

Mail agent

To send the errors at the end of the script you need a message transfer agent on your unix server On Debian you can try exim4 (please find the configuration of that package : http://www.deltasight.fr/utiliser-ovh-smarthost-exim4/)

Configuration

Credentials file

Firstable you need to create the file :

nano /root/.openstack_snapshotrc

export OS_AUTH_URL="https://identity.stack.cloudvps.com/v2.0"
export OS_TENANT_NAME="PROJECT_UUID"
export OS_TENANT_ID="PROJECT_UUID"
export OS_USERNAME="USERNAME"
export OS_PASSWORD="PASSWORD"
export OS_REGION_NAME="REGION"
export LOG_EMAIL_FROM="FROM"
export LOG_EMAIL_TO="TO"

Please note that the last line OS_REGION_NAME is needed for OVH Cloud

Then you need to source it to apply the credentials :

source /root/.openstack_snapshotrc

Install the scripts

For example in your /home/user/ directory you can paste the create_snapshot.sh & count_volume_snapshots.sh

or use the following commands:

wget -q -O - https://raw.githubusercontent.com/Nexenture/openstack-instances-backups/master/create_snapshot.sh > create_snapshot.sh
wget -q -O - https://raw.githubusercontent.com/Nexenture/openstack-instances-backups/master/count_volume_snapshots.sh > count_volume_snapshots.sh

Then you need to set the executable permission on the files :

chmod +x /home/user/create_snapshot.sh
chmod +x /home/user/count_volume_snapshots.sh

Rotations configuration

About the rotations, the second parameter gonna program it. For the volumes the nova backup command already has a native parameter, but for the instances the count_volume_snapshots.sh bash script is going to do the work !

Try it with the dry run !

By default the dry run mode is disable. You need to add a third --dry-run argument to enable it and test the command :

# dry run mode
/home/user/create_snapshot.sh daily 7 --dry-run

# do it mode
/home/user/create_snapshot.sh daily 7