The freezer_dr.monitors.common.driver Module

class freezer_dr.monitors.common.driver.MonitorBaseDriver(backend_name, notifier)

Bases: object

Abstract class that all monitoring plugins should implement to have a unified interface and as many plugins as we want…

abstract analyze_nodes(nodes)

Process nodes from get_data and return list of down nodes :param nodes: dict of metrics of nodes { ‘metric1’: nodes, ‘metric2’: nodes} :return: a list of down nodes

abstract get_data()

Gathering metrics data. making the actual api call to the monitoring system and get a list of nodes status.

get_info()

Get Driver information .. :return: dict of name, version, author, …

abstract get_metrics()

return list of metrics used to monitor compute nodes. it’s Optional not all drivers need to implement this method.

abstract is_alive()

Plugin should provide a way to make sure that the monitoring system is a live or not. It’s optional not all drivers need to implement it. :return: True or False

abstract process_failed(nodes=[], wait=0)

Double check the failed nodes again to make sure that nodes are down. return a list of down nodes to be passed to the evacuation tool to process failed hosts. :param nodes: a list contains pre-checked nodes to re-check them again :param wait: a configurable a mount of time to wait before doing this check to give a chance for the host to recover if there was a minor issue. :return: a list of nodes to be evacuated, the list will be passed directly to the evacuation tool to process them