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snitch_test.py
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snitch_test.py
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import os
import socket
import time
import pytest
import logging
from cassandra import ConsistencyLevel
from dtest import Tester
from tools.jmxutils import (JolokiaAgent, make_mbean,
remove_perf_disable_shared_mem)
since = pytest.mark.since
logger = logging.getLogger(__name__)
@since('2.2.5')
class TestGossipingPropertyFileSnitch(Tester):
# Throws connection refused if cannot connect
def _test_connect(self, address, port):
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.settimeout(0.1)
s.connect((address, port))
s.close()
def test_prefer_local_reconnect_on_listen_address(self):
"""
@jira_ticket CASSANDRA-9748
@jira_ticket CASSANDRA-8084
Test that it's possible to connect over the broadcast_address when
listen_on_broadcast_address=true and that GossipingPropertyFileSnitch
reconnect via listen_address when prefer_local=true
"""
NODE1_LISTEN_ADDRESS = '127.0.0.1'
NODE1_BROADCAST_ADDRESS = '127.0.0.3'
NODE1_LISTEN_FMT_ADDRESS = '/127.0.0.1'
NODE1_BROADCAST_FMT_ADDRESS = '/127.0.0.3'
NODE1_40_LISTEN_ADDRESS = '127.0.0.1:7000'
NODE1_40_BROADCAST_ADDRESS = '127.0.0.3:7000'
NODE2_LISTEN_ADDRESS = '127.0.0.2'
NODE2_BROADCAST_ADDRESS = '127.0.0.4'
NODE2_LISTEN_FMT_ADDRESS = '/127.0.0.2'
NODE2_BROADCAST_FMT_ADDRESS = '/127.0.0.4'
NODE2_40_LISTEN_ADDRESS = '127.0.0.2:7000'
NODE2_40_BROADCAST_ADDRESS = '127.0.0.4:7000'
STORAGE_PORT = 7000
cluster = self.cluster
cluster.populate(2)
node1, node2 = cluster.nodelist()
running40 = node1.get_base_cassandra_version() >= 4.0
cluster.seeds = [NODE1_BROADCAST_ADDRESS]
cluster.set_configuration_options(values={'endpoint_snitch': 'org.apache.cassandra.locator.GossipingPropertyFileSnitch',
'listen_on_broadcast_address': 'true'})
node1.set_configuration_options(values={'broadcast_address': NODE1_BROADCAST_ADDRESS})
node2.auto_bootstrap = True
node2.set_configuration_options(values={'broadcast_address': NODE2_BROADCAST_ADDRESS})
for node in cluster.nodelist():
with open(os.path.join(node.get_conf_dir(), 'cassandra-rackdc.properties'), 'w') as snitch_file:
snitch_file.write("dc=dc1" + os.linesep)
snitch_file.write("rack=rack1" + os.linesep)
snitch_file.write("prefer_local=true" + os.linesep)
node1.start(wait_for_binary_proto=True)
if running40:
node1.watch_log_for("Listening on address: \({}:{}\)".format(NODE1_40_LISTEN_ADDRESS[:-5], STORAGE_PORT), timeout=60)
node1.watch_log_for("Listening on address: \({}:{}\)".format(NODE1_40_BROADCAST_ADDRESS[:-5], STORAGE_PORT), timeout=60)
else:
node1.watch_log_for("Starting Messaging Service on {}:{}".format(NODE1_LISTEN_FMT_ADDRESS, STORAGE_PORT), timeout=60)
node1.watch_log_for("Starting Messaging Service on {}:{}".format(NODE1_BROADCAST_FMT_ADDRESS, STORAGE_PORT), timeout=60)
self._test_connect(NODE1_LISTEN_ADDRESS, STORAGE_PORT)
self._test_connect(NODE1_BROADCAST_ADDRESS, STORAGE_PORT)
# write some data to node1
node1.stress(['write', 'n=10K', 'no-warmup', '-rate', 'threads=8'])
session = self.patient_cql_connection(node1)
stress_table = 'keyspace1.standard1'
original_rows = list(session.execute("SELECT * FROM {}".format(stress_table)))
node2.start(wait_for_binary_proto=True, wait_other_notice=False)
if running40:
node2.watch_log_for("Listening on address: \({}:{}\)".format(NODE2_40_LISTEN_ADDRESS[:-5], STORAGE_PORT), timeout=60)
node2.watch_log_for("Listening on address: \({}:{}\)".format(NODE2_40_BROADCAST_ADDRESS[:-5], STORAGE_PORT), timeout=60)
else:
node2.watch_log_for("Starting Messaging Service on {}:{}".format(NODE2_LISTEN_FMT_ADDRESS, STORAGE_PORT), timeout=60)
node2.watch_log_for("Starting Messaging Service on {}:{}".format(NODE2_BROADCAST_FMT_ADDRESS, STORAGE_PORT), timeout=60)
self._test_connect(NODE2_LISTEN_ADDRESS, STORAGE_PORT)
self._test_connect(NODE2_BROADCAST_ADDRESS, STORAGE_PORT)
# Intiated -> Initiated typo was fixed in 3.10
reconnectFmtString = "Ini?tiated reconnect to an Internal IP {} for the {}"
if node1.get_base_cassandra_version() >= 3.10:
reconnectFmtString = "Initiated reconnect to an Internal IP {} for the {}"
node1.watch_log_for(reconnectFmtString.format(NODE2_40_LISTEN_ADDRESS if running40 else NODE2_LISTEN_FMT_ADDRESS,
NODE2_40_BROADCAST_ADDRESS if running40 else NODE2_BROADCAST_FMT_ADDRESS), filename='debug.log', timeout=60)
node2.watch_log_for(reconnectFmtString.format(NODE1_40_LISTEN_ADDRESS if running40 else NODE1_LISTEN_FMT_ADDRESS,
NODE1_40_BROADCAST_ADDRESS if running40 else NODE1_BROADCAST_FMT_ADDRESS), filename='debug.log', timeout=60)
# read data from node2 just to make sure data and connectivity is OK
session = self.patient_exclusive_cql_connection(node2)
new_rows = list(session.execute("SELECT * FROM {}".format(stress_table)))
assert original_rows == new_rows
out, err, _ = node1.nodetool('gossipinfo')
assert 0 == len(err), err
logger.debug(out)
assert "/{}".format(NODE1_BROADCAST_ADDRESS) in out
assert "INTERNAL_IP:{}:{}".format('9' if running40 else '6', NODE1_LISTEN_ADDRESS) in out
assert "/{}".format(NODE2_BROADCAST_ADDRESS) in out
assert "INTERNAL_IP:{}:{}".format('9' if running40 else '6', NODE2_LISTEN_ADDRESS) in out
if running40:
assert "INTERNAL_ADDRESS_AND_PORT:7:{}".format(NODE1_40_LISTEN_ADDRESS) in out
assert "INTERNAL_ADDRESS_AND_PORT:7:{}".format(NODE1_40_LISTEN_ADDRESS) in out
class TestDynamicEndpointSnitch(Tester):
@pytest.mark.resource_intensive
@since('3.10')
def test_multidatacenter_local_quorum(self):
'''
@jira_ticket CASSANDRA-13074
If we do only local datacenters reads in a multidatacenter DES setup,
DES should take effect and route around a degraded node
'''
def no_cross_dc(scores, cross_dc_nodes):
return all('/' + k.address() not in scores for k in cross_dc_nodes)
def snitchable(scores_before, scores_after, needed_nodes):
return all('/' + k.address() in scores_before and '/' + k.address()
in scores_after for k in needed_nodes)
cluster = self.cluster
cluster.populate([3, 3])
coordinator_node, healthy_node, degraded_node, node4, node5, node6 = cluster.nodelist()
# increase DES reset/update interval so we clear any cross-DC startup reads faster
cluster.set_configuration_options(values={'dynamic_snitch_reset_interval_in_ms': 10000,
'dynamic_snitch_update_interval_in_ms': 50,
'phi_convict_threshold': 12})
remove_perf_disable_shared_mem(coordinator_node)
remove_perf_disable_shared_mem(degraded_node)
# Delay reads on the degraded node by 50 milliseconds
degraded_node.start(jvm_args=['-Dcassandra.test.read_iteration_delay_ms=50',
'-Dcassandra.allow_unsafe_join=true'])
cluster.start(wait_for_binary_proto=30, wait_other_notice=True)
des = make_mbean('db', type='DynamicEndpointSnitch')
read_stage = make_mbean('metrics', type='ThreadPools', path='request',
scope='ReadStage', name='CompletedTasks')
session = self.patient_exclusive_cql_connection(coordinator_node)
session.execute("CREATE KEYSPACE snitchtestks WITH replication = {'class': 'NetworkTopologyStrategy', 'dc1': 3, 'dc2': 3}")
session.execute("CREATE TABLE snitchtestks.tbl1 (key int PRIMARY KEY) WITH speculative_retry = 'NONE' AND dclocal_read_repair_chance = 0.0")
read_stmt = session.prepare("SELECT * FROM snitchtestks.tbl1 where key = ?")
read_stmt.consistency_level = ConsistencyLevel.LOCAL_QUORUM
insert_stmt = session.prepare("INSERT INTO snitchtestks.tbl1 (key) VALUES (?)")
insert_stmt.consistency_level = ConsistencyLevel.ALL
with JolokiaAgent(coordinator_node) as jmx:
with JolokiaAgent(degraded_node) as bad_jmx:
for x in range(0, 300):
session.execute(insert_stmt, [x])
cleared = False
# Wait for a snitch reset in case any earlier
# startup process populated cross-DC read timings
while not cleared:
scores = jmx.read_attribute(des, 'Scores')
cleared = ('/127.0.0.1' in scores and (len(scores) == 1)) or not scores
snitchable_count = 0
for x in range(0, 300):
degraded_reads_before = bad_jmx.read_attribute(read_stage, 'Value')
scores_before = jmx.read_attribute(des, 'Scores')
assert no_cross_dc(scores_before, [node4, node5, node6]), "Cross DC scores were present: " + str(scores_before)
future = session.execute_async(read_stmt, [x])
future.result()
scores_after = jmx.read_attribute(des, 'Scores')
assert no_cross_dc(scores_after, [node4, node5, node6]), "Cross DC scores were present: " + str(scores_after)
if snitchable(scores_before, scores_after,
[coordinator_node, healthy_node, degraded_node]):
snitchable_count = snitchable_count + 1
# If the DES correctly routed the read around the degraded node,
# it shouldn't have another completed read request in metrics
assert (degraded_reads_before ==
bad_jmx.read_attribute(read_stage, 'Value'))
else:
# sleep to give dynamic snitch time to recalculate scores
time.sleep(.1)
# check that most reads were snitchable, with some
# room allowed in case score recalculation is slow
assert snitchable_count >= 250