freezer-dr  13.0.0
About: OpenStack Freezer is a tool to automate (incremental) data backup and restore process using OpenStack Swift and/or other media storage (Disaster Recovery documentation).
The "Zed" series (latest release).
  Fossies Dox: freezer-dr-13.0.0.tar.gz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

No Matches
freezer-dr Documentation

Some Fossies usage hints in advance:

  1. To see the Doxygen generated documentation please click on one of the items in the steelblue colored "quick index" bar above or use the side panel at the left which displays a hierarchical tree-like index structure and is adjustable in width.
  2. If you want to search for something by keyword rather than browse for it you can use the client side search facility (using Javascript and DHTML) that provides live searching, i.e. the search results are presented and adapted as you type in the Search input field at the top right.
  3. Doxygen doesn't incorporate all member files but just a definable subset (basically the main project source code files that are written in a supported language). So to search and browse all member files you may visit the Fossies freezer-dr-13.0.0.tar.gz contents page and use the Fossies standard member browsing features (also with source code highlighting and additionally with optional code folding).

Team and repository tags


Freezer Disaster Recovery

freezer-dr, OpenStack Compute node High Available provides compute node high availability for OpenStack. Simply freezer-dr monitors all compute nodes running in a cloud deployment and if there is any failure in one of the compute nodes freezer-dr will fence this compute node then freezer-dr will try to evacuate all running instances on this compute node, finally freezer-dr will notify all users who have workload/instances running on this compute node as well as will notify the cloud administrators.

freezer-dr has a pluggable architecture so it can be used with:

  1. Any monitoring system to monitor the compute nodes (currently we support only native OpenStack services status)
  2. Any fencing driver (currently supports IPMI, libvirt, ...)
  3. Any evacuation driver (currently supports evacuate api call, may be migrate ??)
  4. Any notification system (currently supports email based notifications, ...)

just by adding a simple plugin and adjust the configuration file to use this plugin or in future a combination of plugins if required

freezer-dr should run in the control plane, however the architecture supports different scenarios. For running freezer-dr under high availability mode, it should run with active passive mode.

How it works

Starting freezer-dr:

  1. freezer-dr Monitoring manager is going to load the required monitoring driver according to the configuration
  2. freezer-dr will query the monitoring system to check if it considers any compute nodes to be down ?
  3. if no, freezer-dr will exit displaying No failed nodes
  4. if yes, freezer-dr will call the fencing manager to fence the failed compute node
  5. Fencing manager will load the correct fencer according to the configuration
  6. once the compute node is fenced and is powered off now we will start the evacuation process
  7. freezer-dr will load the correct evacuation driver
  8. freezer-dr will evacuate all instances to another computes
  9. Once the evacuation process completed, freezer-dr will call the notification manager
  10. The notification manager will load the correct driver based on the configurations
  11. freezer-dr will start the notification process ...