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# Copyright 2013 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
from bzrlib.branch import Branch
from bzrlib.transport import get_transport
from collections import namedtuple
import os
from os.path import dirname
import time
from charmworld.utils import (
LAST_INGEST_JOB_FINISHED,
SERVER_STARTED,
)
Check = namedtuple('check', 'name status remark')
PASS = 'Pass'
FAIL = 'Fail'
def _check_collection_size(request, collection_name):
"""Return a Check that a mongodb collection is not empty."""
status = FAIL
try:
count = request.db[collection_name].count()
if count > 0:
remark = '{0} {1} found'.format(count, collection_name)
status = PASS
else:
remark = 'There are no {0}. Is ingest running?'
remark = remark.format(collection_name)
except:
remark = 'The mongodb {0} collection is not available.'
remark = remark.format(collection_name)
finally:
check = Check('{0} collection'.format(collection_name), status, remark)
return check
def check_charms_collection(request):
"""Return a Check of the mongodb charms collection."""
return _check_collection_size(request, 'charms')
def check_bundles_collection(request):
"""Return a Check of the mongodb bundles collection."""
return _check_collection_size(request, 'bundles')
def check_charm_index(request):
"""Return a Check of the elasticsearch charms index."""
status = FAIL
try:
results = request.index_client.search(terms='')
if results['result_total'] > 0:
remark = '{0} matches found'.format(results['result_total'])
status = PASS
else:
remark = 'There are no matches. Is ingest running?'
except:
remark = 'The elasticsearch charm index is not available.'
finally:
check = Check('charms index', status, remark)
return check
def check_api2(request):
"""Return a Check of the API charms interesting end point."""
status = FAIL
try:
from charmworld.views.api import API2
api = API2(request)
interesting = api.charms(path=['interesting'])['result']
if (interesting['new']
and interesting['popular']
and interesting['featured']):
status = PASS
remark = 'Interesting has new, popular, and featured.'
else:
remark = (
'Interesting is missing new (found {0}), popular '
'(found {1}), or featured (found {2}).')
remark = remark.format(
len(interesting['new']), len(interesting['popular']),
len(interesting['featured']))
except:
remark = 'The API2 is not available.'
finally:
check = Check('API2 interesting', status, remark)
return check
def check_api3(request):
"""Return a Check of the API charms interesting end point."""
status = FAIL
try:
from charmworld.views.api import API3
api = API3(request)
interesting = api.search(path=['interesting'])['result']
if (interesting['new']
and interesting['popular']
and interesting['featured']):
status = PASS
remark = 'Interesting has new, popular, and featured.'
else:
remark = (
'Interesting is missing new (found {0}), popular '
'(found {1}), or featured (found {2}).')
remark = remark.format(
len(interesting['new']), len(interesting['popular']),
len(interesting['featured']))
except:
remark = 'The API3 is not available.'
finally:
check = Check('API3 interesting', status, remark)
return check
def check_collections(request):
"""Return a Check of the collections that should exist in the Mongo DB."""
status = FAIL
required = set((
'basket-queue', 'baskets', 'bundles', 'charm-queue', 'charms'))
try:
existing = set(request.db.collection_names())
missing = required.difference(existing)
if missing:
missing = ', '.join(sorted(missing))
remark = 'Required collections do not (yet) exist: {0}'
remark = remark.format(missing)
else:
status = PASS
remark = 'All required collections exist.'
except:
remark = "Cannot query the MongoDB's collection names."
finally:
check = Check('MongoDB collections', status, remark)
return check
def check_ingest_queues(request):
"""Check the size of the ingest queues."""
status = FAIL
try:
charm_queue_size = request.db['charm-queue'].count()
basket_queue_size = request.db['basket-queue'].count()
status = PASS
remark = 'queued charms: {0}, queued baskets: {1}.'
remark = remark.format(charm_queue_size, basket_queue_size)
except:
remark = 'Cannot query the ingest queues.'
finally:
check = Check('Ingest queue sizes', status, remark)
return check
def check_bzr_revision(request):
"""Return the current bzr revision."""
status = FAIL
try:
branch_dir = dirname(dirname(__file__))
transport = get_transport(branch_dir)
branch = Branch.open_from_transport(transport)
remark = str(branch.revno())
status = PASS
except:
remark = "Can't retrieve revision number."
finally:
check = Check('BZR revision', status, remark)
return check
def check_elasticsearch_status(request):
"""Check the health status of the ElasticSearch server."""
status = FAIL
try:
health = request.index_client.health()
remark = (
'status: {status}, '
'nodes: {number_of_nodes}, '
'active primary shards: {active_primary_shards}, '
'active shards: {active_shards}, '
'initializing shards: {initializing_shards}, '
'relocating shards: {relocating_shards}'
)
remark = remark.format(**health)
if health['status'] in ('green', 'yellow'):
status = PASS
except Exception:
remark = "Can't retrieve the ES server's health status."
finally:
check = Check('ElasticSearch server', status, remark)
return check
def check_crontab(request):
"""Check that a crontab file for charmworld exists."""
if 'charmworld' in os.listdir('/etc/cron.d'):
status = PASS
remark = 'Crontab file for charmworld exists.'
else:
status = FAIL
remark = 'Crontab file for charmworld not found.'
return Check('Crontab', status, remark)
def formatted_timestamp(timestamp):
return time.strftime('%Y-%m-%d %H:%M:%SZ', time.gmtime(timestamp))
def check_server_start_time(request):
"""Return the time when the server was last started."""
try:
start_times = request.db.server_status.find_one(SERVER_STARTED)
del start_times['_id']
start_times = [
'%s: %s' % (hostname, formatted_timestamp(timestamp))
for hostname, timestamp in sorted(start_times.items())]
remark = ', '.join(start_times)
status = PASS
except Exception:
remark = "Can't retrieve the server's start time."
status = FAIL
return Check('Server started', status, remark)
def check_last_ingest_job(request):
"""Return the time when the ingest job finished."""
try:
timestamp = request.db.server_status.find_one(
LAST_INGEST_JOB_FINISHED)['time']
remark = 'finished at %s' % formatted_timestamp(timestamp)
status = PASS
except Exception:
remark = "Can't retrieve the time when the last ingest job finished."
status = FAIL
return Check('Last ingest job', status, remark)
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