def get_events(self, result, ds):
"""
Return a list of event dictionaries informing about the health
of the region server.
"""
data = json.loads(result)
# Check for dead servers.
dead_nodes = [
prepId(dead_node_name(node)[0])
for node in version_diff(data["DeadNodes"])
]
# Send error or clear event.
severity = ((self.component in dead_nodes) and ZenEventClasses.Error
or ZenEventClasses.Clear)
return [{
'component':
self.component,
'summary':
"Region server '{0}' is dead".format(
self.component.replace('_', ':')),
'eventKey':
'hbase_regionserver_monitoring_error',
'eventClass':
'/Status',
'severity':
severity
}]
def add_maps(self, res, ds):
"""
Check for added/removed regionservers and return a RelationshipMap if
any changes took place. Otherwise return ObjectMap which only cleares
the events of non-existiong components.
"""
# Check for removed/added region servers.
dead_nodes = [prepId(dead_node_name(node)[0]) for node in self.dead]
live_nodes = [prepId(node['name']) for node in self.live]
nodes = set(dead_nodes + live_nodes)
self.added = list(nodes.difference(set(ds.regionserver_ids)))
self.removed = list(set(ds.regionserver_ids).difference(nodes))
# Check for removed/added regions.
regions = set(region.get('name') for node in self.live
for region in node.get('Region'))
change = regions.symmetric_difference(ds.region_ids)
# Remodel Regions and RegionServers only if some of them
# were added/removed.
if self.added or self.removed or change:
ds.id = ds.device
result = {'status': res, 'conf': None}
return HBaseCollector().process(ds, result, log)
# If nothing changed, just clear events.
return [ObjectMap({'getClearEvents': True})]
def add_maps(self, res, ds):
"""
Check for added/removed regionservers and return a RelationshipMap if
any changes took place. Otherwise return ObjectMap which only cleares
the events of non-existiong components.
"""
# Check for removed/added region servers.
dead_nodes = [prepId(dead_node_name(node)[0]) for node in self.dead]
live_nodes = [prepId(node['name']) for node in self.live]
nodes = set(dead_nodes + live_nodes)
self.added = list(nodes.difference(set(ds.regionserver_ids)))
self.removed = list(set(ds.regionserver_ids).difference(nodes))
# Check for removed/added regions.
regions = set(
region.get('name') for node in self.live
for region in node.get('Region'))
change = regions.symmetric_difference(ds.region_ids)
# Remodel Regions and RegionServers only if some of them
# were added/removed.
if self.added or self.removed or change:
ds.id = ds.device
result = {'status': res, 'conf': None}
return HBaseCollector().process(ds, result, log)
# If nothing changed, just clear events.
return [ObjectMap({'getClearEvents': True})]
def get_events(self, result, ds):
"""
Return a list of event dictionaries informing about the health
of the region server.
"""
data = json.loads(result)
# Check for dead servers.
dead_nodes = [prepId(dead_node_name(node)[0]) for node
in version_diff(data["DeadNodes"])]
# Send error or clear event.
severity = ((self.component in dead_nodes) and ZenEventClasses.Error
or ZenEventClasses.Clear)
return [{
'component': self.component,
'summary': "Region server '{0}' is dead".format(
self.component.replace('_', ':')),
'eventKey': 'hbase_regionserver_monitoring_error',
'eventClass': '/Status',
'severity': severity
}]