def _health_check(self, database):
# create config parser
cfg_parser = ConfigParser(database)
# get all collections
collections = [c['_id'] for c in database['collections'].find({'dropped': {'$ne': True}})]
# validate that for each collection, the corresponding chunks form a distribution from
# MinKey to MaxKey without gaps or overlaps.
for namespace in collections:
print ' ', namespace,
chunk_dist = cfg_parser.get_chunk_distribution(namespace)
ret, msgs = chunk_dist.check()
if ret:
print ' ok'
else:
print ' failed\n'
for msg in msgs:
print ' ! %s' % msg
print
mc = MongoClient(port=27017)
# specify the config database ( here I imported all 3 config servers to 1 mongod, hence config[1,2,3] )
config_db = mc['config']
# create config parser object with the config_db as parameter
cfg_parser = ConfigParser(config_db)
# get all collections
collections = [c['_id'] for c in config_db['collections'].find({'dropped': {'$ne': True}})]
# validate that for each collection, the corresponding chunks form a distribution from
# MinKey to MaxKey without gaps or overlaps.
for namespace in collections:
print namespace,
chunk_dist = cfg_parser.get_chunk_distribution(namespace)
if chunk_dist.check(verbose=True):
print ' ok'
# pick first collection (arbitrary, change to specific namespace here)
namespace = "attribute.attribute"
# walk distributions backwards from chunks collection, each step applying one changelog event (move / split)
for chunk_dist in cfg_parser.walk_distributions(namespace):
print chunk_dist.applied_change['what'] if chunk_dist.applied_change else '-', chunk_dist.time, len(chunk_dist), chunk_dist.max_shard_version()
# now build full history of ChunkDistribution objects over time (slow, expensive)
history = cfg_parser.build_full_history(namespace)
print history
# find the distribution as it was at a specific date and time, use SortedCollection's "find less than or equal": find_le()
