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#!/usr/bin/env python
'''
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
'''
import optparse
import subprocess
import json
import urllib2
RESOURCEMANAGER = 'rm'
NODEMANAGER = 'nm'
HISTORYSERVER = 'hs'
STARTED_STATE = 'STARTED'
RUNNING_STATE = 'RUNNING'
#Return reponse for given path and address
def getResponse(path, address, ssl_enabled):
if ssl_enabled:
url = 'https://' + address + path
else:
url = 'http://' + address + path
try:
handle = urllib2.urlopen(url)
output = handle.read()
handle.close()
response = json.loads(output)
if response == None:
print 'There is no response for url: ' + str(url)
exit(1)
return response
except Exception as e:
print 'Error getting response for url:' + str(url), e
exit(1)
#Verify that REST api is available for given component
def validateAvailability(component, path, address, ssl_enabled):
try:
response = getResponse(path, address, ssl_enabled)
is_valid = validateAvailabilityResponse(component, response)
if not is_valid:
exit(1)
except Exception as e:
print 'Error checking availability status of component', e
exit(1)
#Validate component-specific response
def validateAvailabilityResponse(component, response):
try:
if component == RESOURCEMANAGER:
rm_state = response['clusterInfo']['state']
if rm_state == STARTED_STATE:
return True
else:
print 'Resourcemanager is not started'
return False
elif component == NODEMANAGER:
node_healthy = bool(response['nodeInfo']['nodeHealthy'])
if node_healthy:
return True
else:
return False
elif component == HISTORYSERVER:
hs_start_time = response['historyInfo']['startedOn']
if hs_start_time > 0:
return True
else:
return False
else:
return False
except Exception as e:
print 'Error validation of availability response for ' + str(component), e
return False
#Verify that component has required resources to work
def validateAbility(component, path, address, ssl_enabled):
try:
response = getResponse(path, address, ssl_enabled)
is_valid = validateAbilityResponse(component, response)
if not is_valid:
exit(1)
except Exception as e:
print 'Error checking ability of component', e
exit(1)
#Validate component-specific response that it has required resources to work
def validateAbilityResponse(component, response):
try:
if component == RESOURCEMANAGER:
nodes = []
if response.has_key('nodes') and not response['nodes'] == None and response['nodes'].has_key('node'):
nodes = response['nodes']['node']
connected_nodes_count = len(nodes)
if connected_nodes_count == 0:
print 'There is no connected nodemanagers to resourcemanager'
return False
active_nodes = filter(lambda x: x['state'] == RUNNING_STATE, nodes)
active_nodes_count = len(active_nodes)
if connected_nodes_count == 0:
print 'There is no connected active nodemanagers to resourcemanager'
return False
else:
return True
else:
return False
except Exception as e:
print 'Error validation of ability response', e
return False
#
# Main.
#
def main():
parser = optparse.OptionParser(usage="usage: %prog [options] component ")
parser.add_option("-p", "--port", dest="address", help="Host:Port for REST API of a desired component")
parser.add_option("-s", "--ssl", dest="ssl_enabled", help="Is SSL enabled for UI of component")
(options, args) = parser.parse_args()
component = args[0]
address = options.address
ssl_enabled = (options.ssl_enabled) in 'true'
if component == RESOURCEMANAGER:
path = '/ws/v1/cluster/info'
elif component == NODEMANAGER:
path = '/ws/v1/node/info'
elif component == HISTORYSERVER:
path = '/ws/v1/history/info'
else:
parser.error("Invalid component")
validateAvailability(component, path, address, ssl_enabled)
if component == RESOURCEMANAGER:
path = '/ws/v1/cluster/nodes'
validateAbility(component, path, address, ssl_enabled)
if __name__ == "__main__":
main()
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