redis学习（０1）：连接redis server

连接redis服务器，示例１

import redis

RedisUrl = "127.0.0.1"

RedisDb = 0

RedisPort = "6379"
# 需要注意, 该值为线程数目, 实际情况应该是多进程, 所以总workers应该为 MAX_WORKERS * 进程数
MAX_WORKERS = 4
connection_kwargs = {
    "host": RedisUrl,
    "port": RedisPort,
    "db": RedisDb,
    "max_connections": MAX_WORKERS
}
# 使用连接池
pool = redis.ConnectionPool(**connection_kwargs)
rs_client = redis.Redis(connection_pool=pool)
#　使用管道，一次执行多条命令
rs_pp = rs_client.pipeline(transaction=True)
# 订阅者/发布者模式
# 发布者
rs_client.publish(u"频道", "msg")
# 订阅者
pub = rs_client.pubsub()
pub.subscribe(u"频道")
pub.parse_response()

 

连接redis服务器，示例２

class Connect_Reids:
    def __init__(self,nodes=[{"host":"127.0.0.1","port":6379}],password=None,db=None):
        """redis连接初始化配置：
        nodes = [{'host':'10.20.18.xxx','port':6380},
                        {'host':'10.20.xxx.xxx','port':6381},
                        {'host':'10.20.xxx.xxx','port':6382},
                        {'host':'10.20.xxx.xxx','port':6383},
                        {'host':'10.20.xxx.xxx','port':6384},
                        {'host':'10.20.xxx.xxx','port':6385}
                       ]
        """
        self.redis_nodes = nodes
        self.redis_password = password
        self.db = db

    def redis_cluster(self):
        """reids 集群连接"""
        try:
            redis_conn = StrictRedisCluster(startup_nodes=self.redis_nodes,password=self.redis_password)
        except Exception as e:
            print("Connect Reids_Cluster Error!")
            print(str(e))
            sys.exit(1)

        return redis_conn

    def redis_single(self,redis_node):
        """redis 单点连接"""
        try:
            redis_conn = redis.Redis(host=redis_node["host"], port=redis_node["port"], \
                                     db=redis_node["db"], password=redis_node["password"])
        except Exception as e:
            print("Connect Reids_Single Error")
            print(str(e))
            sys.exit(1)

        return redis_conn

    def connect_redis(self):
        """根据配置连接redis单点/reids集群"""
        if len(self.redis_nodes) == 1:
            return self.redis_single(self.redis_nodes[0])
        else:
            return self.redis_cluster()