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from urllib.parse import urlparse
import asyncio
import time
import logging
import redis
from open_webui.env import (
REDIS_CLUSTER,
REDIS_SOCKET_CONNECT_TIMEOUT,
REDIS_SENTINEL_HOSTS,
REDIS_SENTINEL_MAX_RETRY_COUNT,
REDIS_SENTINEL_PORT,
REDIS_URL,
REDIS_RECONNECT_DELAY,
)
log = logging.getLogger(__name__)
_CONNECTION_CACHE = {}
class SentinelRedisProxy:
def __init__(self, sentinel, service, *, async_mode: bool = True, **kw):
self._sentinel = sentinel
self._service = service
self._kw = kw
self._async_mode = async_mode
def _master(self):
return self._sentinel.master_for(self._service, **self._kw)
def __getattr__(self, item):
master = self._master()
orig_attr = getattr(master, item)
if not callable(orig_attr):
return orig_attr
FACTORY_METHODS = {"pipeline", "pubsub", "monitor", "client", "transaction"}
if item in FACTORY_METHODS:
return orig_attr
if self._async_mode:
if inspect.isasyncgenfunction(orig_attr):
def _wrapped_iter(*args, **kwargs):
async def _iter():
for i in range(REDIS_SENTINEL_MAX_RETRY_COUNT):
try:
method = getattr(self._master(), item)
async for value in method(*args, **kwargs):
yield value
return
except (
redis.exceptions.ConnectionError,
redis.exceptions.ReadOnlyError,
) as e:
if i < REDIS_SENTINEL_MAX_RETRY_COUNT - 1:
log.debug(
"Redis sentinel fail-over (%s). Retry %s/%s",
type(e).__name__,
i + 1,
REDIS_SENTINEL_MAX_RETRY_COUNT,
)
if REDIS_RECONNECT_DELAY:
time.sleep(REDIS_RECONNECT_DELAY / 1000)
continue
log.error(
"Redis operation failed after %s retries: %s",
REDIS_SENTINEL_MAX_RETRY_COUNT,
e,
)
raise e from e
return _iter()
return _wrapped_iter
async def _wrapped(*args, **kwargs):
for i in range(REDIS_SENTINEL_MAX_RETRY_COUNT):
try:
method = getattr(self._master(), item)
result = method(*args, **kwargs)
if inspect.iscoroutine(result):
return await result
return result
except (
redis.exceptions.ConnectionError,
redis.exceptions.ReadOnlyError,
) as e:
if i < REDIS_SENTINEL_MAX_RETRY_COUNT - 1:
log.debug(
"Redis sentinel fail-over (%s). Retry %s/%s",
type(e).__name__,
i + 1,
REDIS_SENTINEL_MAX_RETRY_COUNT,
)
if REDIS_RECONNECT_DELAY:
await asyncio.sleep(REDIS_RECONNECT_DELAY / 1000)
continue
log.error(
"Redis operation failed after %s retries: %s",
REDIS_SENTINEL_MAX_RETRY_COUNT,
e,
)
raise e from e
return _wrapped
else:
def _wrapped(*args, **kwargs):
for i in range(REDIS_SENTINEL_MAX_RETRY_COUNT):
try:
method = getattr(self._master(), item)
return method(*args, **kwargs)
except (
redis.exceptions.ConnectionError,
redis.exceptions.ReadOnlyError,
) as e:
if i < REDIS_SENTINEL_MAX_RETRY_COUNT - 1:
log.debug(
"Redis sentinel fail-over (%s). Retry %s/%s",
type(e).__name__,
i + 1,
REDIS_SENTINEL_MAX_RETRY_COUNT,
)
if REDIS_RECONNECT_DELAY:
time.sleep(REDIS_RECONNECT_DELAY / 1000)
continue
log.error(
"Redis operation failed after %s retries: %s",
REDIS_SENTINEL_MAX_RETRY_COUNT,
e,
)
raise e from e
return _wrapped
def parse_redis_service_url(redis_url):
parsed_url = urlparse(redis_url)
if parsed_url.scheme != "redis" and parsed_url.scheme != "rediss":
raise ValueError("Invalid Redis URL scheme. Must be 'redis' or 'rediss'.")
return {
"username": parsed_url.username or None,
"password": parsed_url.password or None,
"service": parsed_url.hostname or "mymaster",
"port": parsed_url.port or 6379,
"db": int(parsed_url.path.lstrip("/") or 0),
}
def get_redis_client(async_mode=False):
try:
return get_redis_connection(
redis_url=REDIS_URL,
redis_sentinels=get_sentinels_from_env(
REDIS_SENTINEL_HOSTS, REDIS_SENTINEL_PORT
),
redis_cluster=REDIS_CLUSTER,
async_mode=async_mode,
)
except Exception as e:
log.debug(f"Failed to get Redis client: {e}")
return None
def get_redis_connection(
redis_url,
redis_sentinels,
redis_cluster=False,
async_mode=False,
decode_responses=True,
):
cache_key = (
redis_url,
tuple(redis_sentinels) if redis_sentinels else (),
async_mode,
decode_responses,
)
if cache_key in _CONNECTION_CACHE:
return _CONNECTION_CACHE[cache_key]
connection = None
if async_mode:
import redis.asyncio as redis
# If using sentinel in async mode
if redis_sentinels:
redis_config = parse_redis_service_url(redis_url)
sentinel = redis.sentinel.Sentinel(
redis_sentinels,
port=redis_config["port"],
db=redis_config["db"],
username=redis_config["username"],
password=redis_config["password"],
decode_responses=decode_responses,
socket_connect_timeout=REDIS_SOCKET_CONNECT_TIMEOUT,
)
connection = SentinelRedisProxy(
sentinel,
redis_config["service"],
async_mode=async_mode,
)
elif redis_cluster:
if not redis_url:
raise ValueError("Redis URL must be provided for cluster mode.")
return redis.cluster.RedisCluster.from_url(
redis_url, decode_responses=decode_responses
)
elif redis_url:
connection = redis.from_url(redis_url, decode_responses=decode_responses)
else:
import redis
if redis_sentinels:
redis_config = parse_redis_service_url(redis_url)
sentinel = redis.sentinel.Sentinel(
redis_sentinels,
port=redis_config["port"],
db=redis_config["db"],
username=redis_config["username"],
password=redis_config["password"],
decode_responses=decode_responses,
socket_connect_timeout=REDIS_SOCKET_CONNECT_TIMEOUT,
)
connection = SentinelRedisProxy(
sentinel,
redis_config["service"],
async_mode=async_mode,
)
elif redis_cluster:
if not redis_url:
raise ValueError("Redis URL must be provided for cluster mode.")
return redis.cluster.RedisCluster.from_url(
redis_url, decode_responses=decode_responses
)
elif redis_url:
connection = redis.Redis.from_url(
redis_url, decode_responses=decode_responses
)
_CONNECTION_CACHE[cache_key] = connection
return connection
def get_sentinels_from_env(sentinel_hosts_env, sentinel_port_env):
if sentinel_hosts_env:
sentinel_hosts = sentinel_hosts_env.split(",")
sentinel_port = int(sentinel_port_env)
return [(host, sentinel_port) for host in sentinel_hosts]
return []
def get_sentinel_url_from_env(redis_url, sentinel_hosts_env, sentinel_port_env):
redis_config = parse_redis_service_url(redis_url)
username = redis_config["username"] or ""
password = redis_config["password"] or ""
auth_part = ""
if username or password:
auth_part = f"{username}:{password}@"
hosts_part = ",".join(
f"{host}:{sentinel_port_env}" for host in sentinel_hosts_env.split(",")
)
return f"redis+sentinel://{auth_part}{hosts_part}/{redis_config['db']}/{redis_config['service']}"
|