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oVirt Disaster Recovery

This role has been migrated to oVirt Ansible Collection, please use latest version from there. This repository is now readonly and no longer used for active development.

The oVirt.disaster-recovery role responsible to manage the disaster recovery scenarios in oVirt.

Requirements

  • Ansible version 2.9 or higher
  • Python SDK version 4.4 or higher

Role Variables

Name Default value
dr_ignore_error_clean False Specify whether to ignore errors on clean engine setup.
This is mainly being used to avoid failures when trying to move a storage domain to maintenance/detach it.
dr_ignore_error_recover True Specify whether to ignore errors on recover.
dr_partial_import True Specify whether to use the partial import flag on VM/Template register.
If True, VMs and Templates will be registered without any missing disks, if false VMs/Templates will fail to be registered in case some of their disks will be missing from any of the storage domains.
dr_target_host secondary Specify the default target host to be used in the ansible play.
This host indicates the target site which the recover process will be done.
dr_source_map primary Specify the default source map to be used in the play.
The source map indicates the key which is used to get the target value for each attribute which we want to register with the VM/Template.
dr_reset_mac_pool True If True, then once a VM will be registered, it will automatically reset the mac pool, if configured in the VM.
dr_cleanup_retries_maintenance 3 Specify the number of retries of moving a storage domain to maintenance VM as part of a fail back scenario.
dr_cleanup_delay_maintenance 120 Specify the number of seconds between each retry as part of a fail back scenario.
dr_clean_orphaned_vms True Specify whether to remove any VMs which have no disks from the setup as part of cleanup.
dr_clean_orphaned_disks True Specify whether to remove lun disks from the setup as part of engine setup.
dr_running_vms /tmp/ovirt_dr_running_vm_list Specify the file path which is used to contain the data of the running VMs in the secondary setup before the failback process run on the primary setup after the secondary site cleanup was finished. Note that the /tmp folder is being used as default so the file will not be available after system reboot.

Dependencies

No.

Example Playbook

---
- name: Setup oVirt environment
  hosts: localhost
  connection: local
  vars_files:
     - ovirt_passwords.yml
     - disaster_recovery_vars.yml
  roles:
     - {role: oVirt.disaster-recovery}

Generate var file mapping demo
Fail over scenario demo

Scripts

The ovirt-dr script should provide the user a more convenient way to run disaster recovery actions as a way to avoid using ansible playbooks directly. There are four actions which the user can execute:

  • generate Generate the mapping var file based on the primary and secondary setup, to be used for failover and failback
  • validate Validate the var file mapping which is used for failover and failback
  • failover Start a failover process to the target setup
  • failback Start a failback process from the target setup to the source setup

Each of those actions are using a configuration file whose default location is oVirt.disaster-recovery/files/dr.conf
The configuration file's location can be changed using --conf-file flag in the ovirt-dr script.
Log file and log level can be configured as well through the ovirt-dr script using the flags --log-file and --log-level

Example Script

For mapping file generation:

$ ./ovirt-dr generate --log-file=ovirt-dr.log --log-level=DEBUG

For mapping file validation:

$ ./ovirt-dr validate

For fail-over operation:

$ ./ovirt-dr failover

For fail-back operation:

$ ./ovirt-dr failback

License

Apache License 2.0