redis sentinel 客戶端

1.  報錯問題

sentinel客戶端

調用master = sentinel.discover_master('mymaster')時報錯

 

  File "D:\MyDev\python36\lib\site-packages\redis\connection.py", line 629, in read_response

    raise response

redis.exceptions.ResponseError: DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the loopback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for testing, restart it with the '--protected-mode no' option. 4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.

 

命令測試

[root@s21 ~]# redis-cli -h 192.168.1.20 -p 26379         

192.168.1.20:26379>

192.168.1.20:26379> ping

(error) DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the loopback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for testing, restart it with the '--protected-mode no' option. 4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.

192.168.1.20:26379>

 

 

修改redis配置

bind 0.0.0.0

port 6379

requirepass abc

#　protected-mode yes　　　＃這裏修改yes no 不影響。 不應sentinel配置依舊會報錯

 

sentinel配置添加

protected-mode no

 

 

測試再也不報錯

 

 

2. 代碼

# 測試sentinel時註釋掉直連部分

#/usr/bin/env python3 # -*- coding:utf-8 -*- # mail: infaaf@126.com

import redis from redis.sentinel import Sentinel import random #直接鏈接方式
client= redis.StrictRedis(host='192.168.1.20',port=6379,db=0,password='abc') res=client.get('k1').decode() print('直接鏈接方式操做',res) # sentinel鏈接方式
sentinel = Sentinel([('192.168.1.20',26379),('192.168.1.21',26379),('192.168.1.22',26379)],socket_timeout=0.1) master = sentinel.discover_master('mymaster') slave = sentinel.discover_slaves('mymaster') # print(master) # ('192.168.1.20', 6379) # print(slave) # [('192.168.1.22', 6379), ('192.168.1.21', 6379)]
 writeclient= redis.StrictRedis(host=master[0],port=master[1],db=0,password='abc') r= random.randrange(0,len(slave)) readclient=redis.StrictRedis(host=slave[r][0],port=slave[r][1],db=0,password='abc') userdict={'name':'tom','type':'cat'} writeclient.hmset('u:1',userdict) res = readclient.hget('u:1','name').decode() print(res)

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修改版

#/usr/bin/env python3 # -*- coding:utf-8 -*- # mail: infaaf@126.com

import redis from redis.sentinel import Sentinel import random #直接鏈接方式 # client= redis.StrictRedis(host='192.168.1.20',port=6379,db=0,password='abc') # res=client.get('k1').decode() # print('直接鏈接方式',res)


# 哨兵鏈接方式： 從sentinel獲取主從節點後鏈接 # 從redis2.8開始支持
sentinel = Sentinel([('192.168.1.20',26379),('192.168.1.21',26379),('192.168.1.22',26379)],socket_timeout=0.1) master = sentinel.discover_master('mymaster') slave = sentinel.discover_slaves('mymaster') print(master)  # ('192.168.1.20', 6379)
print(slave)   # [('192.168.1.22', 6379), ('192.168.1.21', 6379)]

# 手動過程鏈接 （測試用）
writeclient= redis.StrictRedis(host=master[0],port=master[1],db=0,password='abc') r= random.randrange(0,len(slave)) readclient=redis.StrictRedis(host=slave[r][0],port=slave[r][1],db=0,password='abc') userdict={'name':'tom','type':'cat'} writeclient.hmset('u:1',userdict) res = readclient.hget('u:1','name').decode() print('哨兵鏈接方式 clinet: {client}, res: {res}'.format(client=slave[r],res=res)) # 自動鏈接 （實際使用）
automaster = sentinel.master_for('mymaster', socket_timeout=0.5, password='abc', db=0) w_ret = automaster.set('foo', 'bar') autoslave = sentinel.slave_for('mymaster', socket_timeout=0.5, password='abc', db=0) r_ret = autoslave.get('foo') print('自動選取從節點獲取數據',r_ret)

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結果