Enable/Disable/Configure a pollster in runtime
When using ceilometer for monitoring, sometimes the users want to enable/disable some pollsters which are only for testing/debugging purpose in runtime, without modifying the configuration file and restarting the agent.
Besides, some users might want to ask a pollster only to monitor part of the resources available to it, e.g. only to monitor one specific nova instance. The users need to pass the instance UUID as a configuration-
We might need to design a framework to allow the user to use the "management-API" to do the following things in the run-time:
- enable/disable a pollster
- get/set configuration parameter for a pollster
- ask a pollster to immediately start polling, instead of waiting for other pollsters in the same polling task to finish before it can start poll.
Blueprint information
Whiteboard
According to the H summit discussion, instead of using the "Management-API", we decided to either:
- check timestamp on pipeline config file and rebuild if changed (leverage policy file change detection logic)
- or alternatively use signal trapping to trigger change, e.g. SIGUSR1
Gerrit topic: https:/
Addressed by: https:/
Add service restart function
Work Items
Dependency tree
* Blueprints in grey have been implemented.
