def service_check(self, env):
import params
Logger.info("Ambari Metrics service check was started.")
env.set_params(params)
results = execute_in_parallel(self.service_check_for_single_host, params.ams_collector_hosts.split(','), params)
for host in str(params.ams_collector_hosts).split(","):
if host in results:
if results[host].status == SUCCESS:
Logger.info("Ambari Metrics service check passed on host " + host)
return
else:
Logger.warning(results[host].result)
raise Fail("All metrics collectors are unavailable.")
def create_ams_datasource():
import params
server = Server(protocol = params.ams_grafana_protocol.strip(),
host = params.ams_grafana_host.strip(),
port = params.ams_grafana_port,
user = params.ams_grafana_admin_user,
password = params.ams_grafana_admin_pwd)
"""
Create AMS datasource in Grafana, if exsists make sure the collector url is accurate
"""
Logger.info("Trying to find working metric collector")
results = execute_in_parallel(do_ams_collector_post, params.ams_collector_hosts.split(','), params)
new_datasource_host = ""
for host in params.ams_collector_hosts.split(','):
if host in results:
if results[host].status == SUCCESS:
new_datasource_host = host
Logger.info("Found working collector on host %s" % new_datasource_host)
break
else:
Logger.warning(results[host].result)
if new_datasource_host == "":
Logger.warning("All metric collectors are unavailable. Will use random collector as datasource host.")
new_datasource_host = params.metric_collector_host
Logger.info("New datasource host will be %s" % new_datasource_host)
ams_datasource_json = Template('metrics_grafana_datasource.json.j2',
ams_datasource_name=METRICS_GRAFANA_DATASOURCE_NAME, ams_datasource_host=new_datasource_host).get_content()
Logger.info("Checking if AMS Grafana datasource already exists")
response = perform_grafana_get_call(GRAFANA_DATASOURCE_URL, server)
create_datasource = True
if response and response.status == 200:
datasources = response.read()
datasources_json = json.loads(datasources)
for i in xrange(0, len(datasources_json)):
datasource_name = datasources_json[i]["name"]
if datasource_name == METRICS_GRAFANA_DATASOURCE_NAME:
create_datasource = False # datasource already exists
Logger.info("Ambari Metrics Grafana datasource already present. Checking Metrics Collector URL")
datasource_url = datasources_json[i]["url"]
update_datasource = False
if is_unchanged_datasource_url(datasource_url, new_datasource_host):
Logger.info("Metrics Collector URL validation succeeded.")
else:
Logger.info("Metrics Collector URL validation failed.")
update_datasource = True
datasource_type = datasources_json[i]["type"]
new_datasource_def = json.loads(ams_datasource_json)
new_datasource_type = new_datasource_def["type"]
if datasource_type == new_datasource_type:
Logger.info("Grafana datasource type validation succeeded.")
else:
Logger.info("Grafana datasource type validation failed. Old type = %s, New type = %s" % (datasource_type, new_datasource_type))
update_datasource = True
if update_datasource: # Metrics datasource present, but collector host is wrong or the datasource type is outdated.
datasource_id = datasources_json[i]["id"]
Logger.info("Updating datasource, id = %s" % datasource_id)
(response, data) = perform_grafana_put_call(GRAFANA_DATASOURCE_URL, datasource_id,
ams_datasource_json, server)
if response.status == 200:
Logger.info("Ambari Metrics Grafana data source updated.")
elif response.status == 500:
Logger.info("Ambari Metrics Grafana data source update failed. Not retrying.")
raise Fail("Ambari Metrics Grafana data source update failed. PUT request status: %s %s \n%s" %
(response.status, response.reason, data))
else:
raise Fail("Ambari Metrics Grafana data source creation failed. "
"PUT request status: %s %s \n%s" % (response.status, response.reason, data))
pass
pass
pass
else:
Logger.info("Error checking for Ambari Metrics Grafana datasource. Will attempt to create.")
if not create_datasource:
return
else:
Logger.info("Generating datasource:\n%s" % ams_datasource_json)
(response, data) = perform_grafana_post_call(GRAFANA_DATASOURCE_URL, ams_datasource_json, server)
if response.status == 200:
Logger.info("Ambari Metrics Grafana data source created.")
elif response.status == 500:
Logger.info("Ambari Metrics Grafana data source creation failed. Not retrying.")
raise Fail("Ambari Metrics Grafana data source creation failed. POST request status: %s %s \n%s" %
(response.status, response.reason, data))
else:
Logger.info("Ambari Metrics Grafana data source creation failed.")
raise Fail("Ambari Metrics Grafana data source creation failed. POST request status: %s %s \n%s" %
(response.status, response.reason, data))
pass
