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import socket
import pytest
import pytest_asyncio
import redis.asyncio.sentinel
from redis import exceptions
from redis.asyncio.sentinel import (
MasterNotFoundError,
Sentinel,
SentinelConnectionPool,
SlaveNotFoundError,
)
@pytest_asyncio.fixture(scope="module")
def master_ip(master_host):
yield socket.gethostbyname(master_host)
class SentinelTestClient:
def __init__(self, cluster, id):
self.cluster = cluster
self.id = id
async def sentinel_masters(self):
self.cluster.connection_error_if_down(self)
self.cluster.timeout_if_down(self)
return {self.cluster.service_name: self.cluster.master}
async def sentinel_slaves(self, master_name):
self.cluster.connection_error_if_down(self)
self.cluster.timeout_if_down(self)
if master_name != self.cluster.service_name:
return []
return self.cluster.slaves
async def execute_command(self, *args, **kwargs):
# wrapper purely to validate the calls don't explode
from redis.asyncio.client import bool_ok
return bool_ok
class SentinelTestCluster:
def __init__(self, service_name="mymaster", ip="127.0.0.1", port=6379):
self.clients = {}
self.master = {
"ip": ip,
"port": port,
"is_master": True,
"is_sdown": False,
"is_odown": False,
"num-other-sentinels": 0,
}
self.service_name = service_name
self.slaves = []
self.nodes_down = set()
self.nodes_timeout = set()
def connection_error_if_down(self, node):
if node.id in self.nodes_down:
raise exceptions.ConnectionError
def timeout_if_down(self, node):
if node.id in self.nodes_timeout:
raise exceptions.TimeoutError
def client(self, host, port, **kwargs):
return SentinelTestClient(self, (host, port))
@pytest_asyncio.fixture()
async def cluster(master_ip):
cluster = SentinelTestCluster(ip=master_ip)
saved_Redis = redis.asyncio.sentinel.Redis
redis.asyncio.sentinel.Redis = cluster.client
yield cluster
redis.asyncio.sentinel.Redis = saved_Redis
@pytest_asyncio.fixture()
def sentinel(request, cluster):
return Sentinel([("foo", 26379), ("bar", 26379)])
@pytest.mark.onlynoncluster
async def test_discover_master(sentinel, master_ip):
address = await sentinel.discover_master("mymaster")
assert address == (master_ip, 6379)
@pytest.mark.onlynoncluster
async def test_discover_master_error(sentinel):
with pytest.raises(MasterNotFoundError):
await sentinel.discover_master("xxx")
@pytest.mark.onlynoncluster
async def test_discover_master_sentinel_down(cluster, sentinel, master_ip):
# Put first sentinel 'foo' down
cluster.nodes_down.add(("foo", 26379))
address = await sentinel.discover_master("mymaster")
assert address == (master_ip, 6379)
# 'bar' is now first sentinel
assert sentinel.sentinels[0].id == ("bar", 26379)
@pytest.mark.onlynoncluster
async def test_discover_master_sentinel_timeout(cluster, sentinel, master_ip):
# Put first sentinel 'foo' down
cluster.nodes_timeout.add(("foo", 26379))
address = await sentinel.discover_master("mymaster")
assert address == (master_ip, 6379)
# 'bar' is now first sentinel
assert sentinel.sentinels[0].id == ("bar", 26379)
@pytest.mark.onlynoncluster
async def test_master_min_other_sentinels(cluster, master_ip):
sentinel = Sentinel([("foo", 26379)], min_other_sentinels=1)
# min_other_sentinels
with pytest.raises(MasterNotFoundError):
await sentinel.discover_master("mymaster")
cluster.master["num-other-sentinels"] = 2
address = await sentinel.discover_master("mymaster")
assert address == (master_ip, 6379)
@pytest.mark.onlynoncluster
async def test_master_odown(cluster, sentinel):
cluster.master["is_odown"] = True
with pytest.raises(MasterNotFoundError):
await sentinel.discover_master("mymaster")
@pytest.mark.onlynoncluster
async def test_master_sdown(cluster, sentinel):
cluster.master["is_sdown"] = True
with pytest.raises(MasterNotFoundError):
await sentinel.discover_master("mymaster")
@pytest.mark.onlynoncluster
async def test_discover_slaves(cluster, sentinel):
assert await sentinel.discover_slaves("mymaster") == []
cluster.slaves = [
{"ip": "slave0", "port": 1234, "is_odown": False, "is_sdown": False},
{"ip": "slave1", "port": 1234, "is_odown": False, "is_sdown": False},
]
assert await sentinel.discover_slaves("mymaster") == [
("slave0", 1234),
("slave1", 1234),
]
# slave0 -> ODOWN
cluster.slaves[0]["is_odown"] = True
assert await sentinel.discover_slaves("mymaster") == [("slave1", 1234)]
# slave1 -> SDOWN
cluster.slaves[1]["is_sdown"] = True
assert await sentinel.discover_slaves("mymaster") == []
cluster.slaves[0]["is_odown"] = False
cluster.slaves[1]["is_sdown"] = False
# node0 -> DOWN
cluster.nodes_down.add(("foo", 26379))
assert await sentinel.discover_slaves("mymaster") == [
("slave0", 1234),
("slave1", 1234),
]
cluster.nodes_down.clear()
# node0 -> TIMEOUT
cluster.nodes_timeout.add(("foo", 26379))
assert await sentinel.discover_slaves("mymaster") == [
("slave0", 1234),
("slave1", 1234),
]
@pytest.mark.onlynoncluster
async def test_master_for(cluster, sentinel, master_ip):
master = sentinel.master_for("mymaster", db=9)
assert await master.ping()
assert master.connection_pool.master_address == (master_ip, 6379)
# Use internal connection check
master = sentinel.master_for("mymaster", db=9, check_connection=True)
assert await master.ping()
@pytest.mark.onlynoncluster
async def test_slave_for(cluster, sentinel):
cluster.slaves = [
{"ip": "127.0.0.1", "port": 6379, "is_odown": False, "is_sdown": False}
]
slave = sentinel.slave_for("mymaster", db=9)
assert await slave.ping()
@pytest.mark.onlynoncluster
async def test_slave_for_slave_not_found_error(cluster, sentinel):
cluster.master["is_odown"] = True
slave = sentinel.slave_for("mymaster", db=9)
with pytest.raises(SlaveNotFoundError):
await slave.ping()
@pytest.mark.onlynoncluster
async def test_slave_round_robin(cluster, sentinel, master_ip):
cluster.slaves = [
{"ip": "slave0", "port": 6379, "is_odown": False, "is_sdown": False},
{"ip": "slave1", "port": 6379, "is_odown": False, "is_sdown": False},
]
pool = SentinelConnectionPool("mymaster", sentinel)
rotator = pool.rotate_slaves()
assert await rotator.__anext__() in (("slave0", 6379), ("slave1", 6379))
assert await rotator.__anext__() in (("slave0", 6379), ("slave1", 6379))
# Fallback to master
assert await rotator.__anext__() == (master_ip, 6379)
with pytest.raises(SlaveNotFoundError):
await rotator.__anext__()
@pytest.mark.onlynoncluster
async def test_ckquorum(cluster, sentinel):
assert await sentinel.sentinel_ckquorum("mymaster")
@pytest.mark.onlynoncluster
async def test_flushconfig(cluster, sentinel):
assert await sentinel.sentinel_flushconfig()
@pytest.mark.onlynoncluster
async def test_reset(cluster, sentinel):
cluster.master["is_odown"] = True
assert await sentinel.sentinel_reset("mymaster")
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