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analytics_net.py
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analytics_net.py
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import alog
import tempfile
from kubernetes import client, config
import urllib3
import base64
import requests
import datetime
urllib3.disable_warnings()
logger = alog.use_channel("analytics")
class AnalyticsNet(object):
""" Analytics Subsystem data """
namespace = ''
token = None
token_expires = 0
max_frequency = 600
data = {}
last_run = False
data_time = 0
use_kubeconfig = False
hostname = None
trawler = None
version = "10.0"
time_interval = 3600
certificates = None
status_map = {"green": 2, "yellow": 1, "red": 0}
def __init__(self, config, trawler):
# Takes in config object and trawler instance it's behind
# In k8s or outside
self.use_kubeconfig = trawler.use_kubeconfig
# Namespace to find managemnet pods
self.namespace = config.get('namespace', 'default')
# Maximum frequency to pull data from APIC
self.max_frequency = int(config.get('frequency', 600))
self.time_interval = int(config.get('time_interval', 3600))
self.trawler = trawler
if self.use_kubeconfig:
logger.error("Analytics metrics currently only available in cluster setting localhost:9200 for testing")
self.hostname = 'localhost:9200'
self.find_hostname_and_certs()
else:
self.find_hostname_and_certs()
def load_certs_from_secret(self, v1, secret_name):
# Get certificates to communicate with analytics
secret = v1.read_namespaced_secret(secret_name, namespace=self.namespace )
cert = None
cert = base64.b64decode(secret.data['tls.crt'])
key = base64.b64decode(secret.data['tls.key'])
if cert:
combined = key + "\n".encode() + cert
self.certificates = tempfile.NamedTemporaryFile('w', delete=False)
with self.certificates as certfile:
certfile.write(combined.decode())
def find_hostname_and_certs(self):
""" Lookup hostname and certs for communicating with analytics subsystem"""
try:
# Initialise the k8s API
if self.use_kubeconfig:
config.load_kube_config()
logger.info("Not in cluster, so will assume port-forward")
v1 = client.CoreV1Api()
else:
config.load_incluster_config()
logger.info("In cluster, so looking for analytics services")
v1 = client.CoreV1Api()
# Identify analytics version
customObjectsApi = client.CustomObjectsApi()
analytics_clusters = customObjectsApi.list_cluster_custom_object(
"analytics.apiconnect.ibm.com",
'v1beta1',
'analyticsclusters')
self.version = analytics_clusters['items'][0]['status']['versions']['reconciled']
if self.version > '10.0.5':
director_svc = analytics_clusters['items'][0]['status']['services']['director']
self.hostname = '{}.{}.svc:3009'.format(director_svc, self.namespace)
if self.use_kubeconfig:
self.hostname = 'localhost:3009'
self.load_certs_from_secret(v1, analytics_clusters['items'][0]['status']['serviceClientSecret'])
else:
# Identify analytics-storage service
servicelist = v1.list_namespaced_service(namespace=self.namespace)
logger.info("found {} services in namespace {}".format(len(servicelist.items), self.namespace))
for service in servicelist.items:
if 'analytics-storage' in service.metadata.name:
for port_object in service.spec.ports:
if port_object.name == 'http-es' or port_object.name == 'http':
port = 9200 # default
if port_object.port:
port = port_object.port
self.hostname = "{}.{}.svc.cluster.local.:{}".format(
service.metadata.name, self.namespace, port)
if self.hostname:
logger.info("Identified service host: {}".format(self.hostname))
# Get certificates to communicate with analytics
secrets_response = v1.list_namespaced_secret(namespace=self.namespace)
cert = None
for item in secrets_response.items:
if item.metadata.name.startswith('analytics-storage-velox-certs'):
cert = base64.b64decode(item.data['analytics-storage_client_public.cert.pem'])
key = base64.b64decode(item.data['analytics-storage_client_private.key.pem'])
break
elif item.metadata.name == 'analytics-client':
cert = base64.b64decode(item.data['tls.crt'])
key = base64.b64decode(item.data['tls.key'])
break
if cert:
combined = key + "\n".encode() + cert
self.certificates = tempfile.NamedTemporaryFile('w', delete=False)
logger.trace("Certificate file is %s", self.certificates.name)
with self.certificates as certfile:
certfile.write(combined.decode())
except client.rest.ApiException as e:
logger.error('Error calling kubernetes API')
logger.exception(e)
def buildQuery(self):
""" Build search query """
return """{
"size": 0,
"query": {
"range": {"datetime": {
"gte": "now-1h",
"lt": "now"
}}
},
"aggs": {"status_codes": {"filters": {"filters": {
"1xx": {"regexp": {"status_code": "1.*"}},
"2xx": {"regexp": {"status_code": "2.*"}},
"3xx": {"regexp": {"status_code": "3.*"}},
"4xx": {"regexp": {"status_code": "4.*"}},
"5xx": {"regexp": {"status_code": "5.*"}}
}}}}
}"""
def fish_analytics_v1(self):
errored = False
try:
r = requests.get('https://{}/_cluster/health'.format(self.hostname),
verify=False,
cert=self.certificates.name)
health_obj = r.json()
logger.debug(r.text)
except requests.exceptions.ConnectionError:
logger.error("Error getting cluster health from 'https://{}/_cluster/health'".format(
self.hostname))
errored = True
health_obj = {}
try:
cluster_status = self.status_map[health_obj['status']]
except KeyError:
cluster_status = -1
self.trawler.set_gauge('analytics', 'cluster_status', cluster_status)
if not errored:
self.trawler.set_gauge('analytics', 'data_nodes_total', health_obj['number_of_data_nodes'])
self.trawler.set_gauge('analytics', 'nodes_total', health_obj['number_of_nodes'])
self.trawler.set_gauge('analytics', 'active_primary_shards_total', health_obj['active_primary_shards'])
self.trawler.set_gauge('analytics', 'active_shards_total', health_obj['active_shards'])
self.trawler.set_gauge('analytics', 'relocating_shards_total', health_obj['relocating_shards'])
self.trawler.set_gauge('analytics', 'initializing_shards_total', health_obj['initializing_shards'])
self.trawler.set_gauge('analytics', 'unassigned_shards_total', health_obj['unassigned_shards'])
self.trawler.set_gauge('analytics', 'initializing_shards_total', health_obj['initializing_shards'])
self.trawler.set_gauge('analytics', 'pending_tasks_total', health_obj['number_of_pending_tasks'])
calls_req = requests.get('https://{}/apic-api-r/_search'.format(self.hostname), verify=False,
cert=self.certificates.name, data=self.buildQuery())
summary = calls_req.json()
self.trawler.set_gauge('analytics', 'apicalls_lasthour.total', summary['hits']['total'])
for status in summary['aggregations']['status_codes']['buckets']:
doc_count = summary['aggregations']['status_codes']['buckets'][status]['doc_count']
self.trawler.set_gauge('analytics', 'apicalls_lasthour.{}'.format(status), doc_count)
else:
logger.info("Cluster health failed, so no data and no point querying for calls")
def fish_analytics_v2(self):
errored=False
# Cluster Health
try:
health = requests.get(
"https://{}/cloud/clustermgmt/storage/cluster/health".format(self.hostname),
verify=False,
cert=self.certificates.name
)
health_obj = health.json()
logger.debug(health.text)
except requests.exceptions.ConnectionError:
logger.error("Error getting cluster health")
errored = True
health_obj = {}
try:
cluster_status = self.status_map[health_obj['status']]
except KeyError:
cluster_status = -1
self.trawler.set_gauge('analytics', 'cluster_status', cluster_status)
if not errored:
self.trawler.set_gauge('analytics', 'data_nodes_total', health_obj['number_of_data_nodes'])
self.trawler.set_gauge('analytics', 'nodes_total', health_obj['number_of_nodes'])
self.trawler.set_gauge('analytics', 'active_primary_shards_total', health_obj['active_primary_shards'])
self.trawler.set_gauge('analytics', 'active_shards_total', health_obj['active_shards'])
self.trawler.set_gauge('analytics', 'relocating_shards_total', health_obj['relocating_shards'])
self.trawler.set_gauge('analytics', 'initializing_shards_total', health_obj['initializing_shards'])
self.trawler.set_gauge('analytics', 'unassigned_shards_total', health_obj['unassigned_shards'])
self.trawler.set_gauge('analytics', 'initializing_shards_total', health_obj['initializing_shards'])
self.trawler.set_gauge('analytics', 'pending_tasks_total', health_obj['number_of_pending_tasks'])
if self.time_interval == 3600:
timeframe = 'timeframe=last1hour'
metric_name = 'lasthour'
elif self.time_interval == 0:
# Auto interval
if self.last_run:
start_time = self.last_run
else:
start_time = datetime.datetime.now()
metric_name = 'thisloop'.format(self.time_interval)
timeframe = 'start={}'.format(start_time.isoformat('T'))
self.last_run = datetime.datetime.now()
else:
now_time = datetime.datetime.now()
start_time = now_time - datetime.timedelta(seconds=30)
metric_name = 'last{}s'.format(self.time_interval)
timeframe = 'start={}'.format(start_time.isoformat('T'))
logger.info('https://{}/cloud/dashboards/status?{}'.format(self.hostname, timeframe))
calls_req = requests.get('https://{}/cloud/dashboards/status?{}'.format(self.hostname, timeframe), verify=False,
cert=self.certificates.name)
print(calls_req.text)
summary = calls_req.json()
summary_output = {'1':0,'2':0,'3':0,'4':0,'5':0}
total = 0
for status in summary['status_codes']['data']:
if status['group'][0] in summary_output:
summary_output[status['group'][0]] += status['value']
total += status['value']
self.trawler.set_gauge('analytics', 'apicalls_{}.total'.format(metric_name), total)
for status in summary_output:
self.trawler.set_gauge('analytics', 'apicalls_{}.{}xx'.format(metric_name, status), summary_output[status])
@alog.timed_function(logger.trace)
def fish(self):
""" main metrics gathering function """
if self.version < "10.0.5":
if self.hostname:
self.fish_analytics_v1()
else:
self.fish_analytics_v2()
if __name__ == "__main__":
net = AnalyticsNet({"namespace": "apic-management"}, None)
net.fish()