电子商务网站开发背景,专门做特医食品的网站,网络组建与安全通知,网站开发语言哪一种好些前言前面《Docker-Compose搭建Redis高可用哨兵集群》#xff0c;我的思路是将Redis、Sentinel、Redis Client App链接到同一个网桥网络#xff0c;这个网桥内的Redis Client App就可以使用ContainerIP访问网桥内任意redis节点。同一网桥网络访问规避了Docker上发生的NAT… 前言前面《Docker-Compose搭建Redis高可用哨兵集群》我的思路是将Redis、Sentinel、Redis Client App链接到同一个网桥网络这个网桥内的Redis Client App就可以使用ContainerIP访问网桥内任意redis节点。同一网桥网络访问规避了Docker上发生的NAT端口映射的复杂性, 但实际上并不是最常规做法。Redis Client App独立组网遇到的问题很多时候Redis Client App与Redis-Sentinel独立组网这样对Redis-Sentinel的访问就会涉及Docker宿主机NAT转换、Port映射。(这里我们就不提Docker Host模式搭建Redis-Sentinel了)资料显示 Sentinel,Docker或其他形式的网络地址转换或端口映射应谨慎混合大意是说节点无法区分收到的信息是否是已经发生Nat转换或端口映射的结果。为了解决Redis-Sentinel在Docker环境下因为NATForward Port导致的无法正确获知Slaves和正确故障转移的问题。Redis3.2之后可以强制让Slave声明自己的(IP,Port)强制让Sentinel声明自己的(IP,Port # since Redis 3.2.2, to force a replica to announce an arbitrary pair of IP and port to the master. The two configurations directives to use are:
replica-announce-ip ip
replica-announce-port port
上述配置可以写在Docker Command参数指定或通过Volume redis.conf 加载进redis容器# you can use the following two Sentinel configuration directives in order to force Sentinel to announce a specific set of IP and port:sentinel announce-ip ip
sentinel announce-port portsentinel.conf的配置只能通过Config加载进sentinel容器。通过明牌方式通知所有交互对象redis实例就是在这个(IP,Port)上发生了NAT转换、Port映射。C#两大客户端访问Redis-Sentinel的方式归根到底一张图Redis Client先询问Sentinels,Sentinel返回Master (IP,Port)Redis Client再与以上Master (IP,Port)建立连接Docker部署Redis-Sentinel 并强制声明IP、Port这里我们采用主动声明方式在Docker上部署了Redis-Sentinel集群 1Master- 2 Slave- 3Sentinel 分别占据宿主机6380、6381、6382、 26379、26380、26381端口.CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
484da8d832f1 redis docker-entrypoint.s… 2 hours ago Up 2 hours 6379/tcp, 0.0.0.0:26380-26379/tcp redis-sentinel-2
50599c15adba redis docker-entrypoint.s… 2 hours ago Up 2 hours 6379/tcp, 0.0.0.0:26379-26379/tcp redis-sentinel-1
51ce90cc52d7 redis docker-entrypoint.s… 2 hours ago Up 2 hours 6379/tcp, 0.0.0.0:26381-26379/tcp redis-sentinel-3
d58d6973de28 redis docker-entrypoint.s… 2 hours ago Up 2 hours 0.0.0.0:6381-6379/tcp redis-slave-1
b88bd85ac109 redis docker-entrypoint.s… 2 hours ago Up 8 seconds 0.0.0.0:6382-6379/tcp redis-slave-2
3dc26c01a90d redis docker-entrypoint.s… 2 hours ago Up About an hour 0.0.0.0:6380-6379/tcp redis-master进入任意Sentinel节点使用sentinel master mymaster确认集群信息存在测试键值testKeyhello Redis-sentinelStackExchange.Redis CSRedisCore连接Redis哨兵老牌StackExchange.Redis 今年才真正支持Sentinel Github上有关Sentinel的Issue、PR历时久远PR像便秘一样最近才关闭。https://github.com/StackExchange/StackExchange.Redis/pull/692#issuecomment-375298108https://github.com/StackExchange/StackExchange.Redis/pull/1067CSRedisCore得到真传很早就支持连接哨兵而且编程写法更简单清晰。话不多说using StackExchange.Redis;
using System;namespace ConsoleApp
{class Program{static void Main(string[] args){var sw new Stopwatch();sw.Start();UseStackExchangeRedis();sw.Stop();Console.WriteLine(连接查询测试key,耗时sw.ElapsedMilliseconds);sw.Reset();sw.Start();UseCSRedisCore();sw.Stop();Console.WriteLine(连接查询测试key,耗时 sw.ElapsedMilliseconds);Console.ReadKey();}// StackExchange.Reids连接Redis-Sentinelpublic static void UseStackExchangeRedis(){ConfigurationOptions sentinelOptions new ConfigurationOptions();sentinelOptions.EndPoints.Add(180.76.*.*, 26379);sentinelOptions.EndPoints.Add(180.76.*.*, 26380);sentinelOptions.EndPoints.Add(180.76.*.*, 26381);sentinelOptions.TieBreaker ;sentinelOptions.CommandMap CommandMap.Sentinel;sentinelOptions.AbortOnConnectFail false;// Connect!ConnectionMultiplexer sentinelConnection ConnectionMultiplexer.Connect(sentinelOptions);// Get a connection to the masterConfigurationOptions redisServiceOptions new ConfigurationOptions();redisServiceOptions.ServiceName mymaster1; //master名称redisServiceOptions.Password redis_pwd; //master访问密码redisServiceOptions.AbortOnConnectFail true;ConnectionMultiplexer masterConnection sentinelConnection.GetSentinelMasterConnection(redisServiceOptions);var db masterConnection.GetDatabase();var value db.StringGet(testKey);Console.WriteLine($[Use StackExchange-Redis] The remote redis-sentinel test key value:{value});}// CSRedisCore连接Redis-Sentinelpublic static void UseCSRedisCore(){var csredis new CSRedis.CSRedisClient(mymaster1,passwordredis_pwd,new[] { 180.76.*.*:26379, 180.76.*.*:26380, 180.76.*.*:26381 });var value csredis.Get(testKey);Console.WriteLine($[Use CSRedisCore] The remote redis-sentinel test key value:{value});}}
}
执行输出StackExchange.Redis更能体现连接的实质过程先查询再连接。CSRedisCore 小白写法无感知。总结输入本文记录两个内容1. Redis-Sentinel在Docker环境因NATForward_Port触发的问题 以及Redis官方给出的方案2. C# Redis客户端连接Redis-Sentinel集群Gthubhttps://github.com/zaozaoniao/Redis-sentinel-with-docker-compose本文纯手写测试期待你的反馈。https://redis.io/topics/sentinelhttps://redis.io/topics/replication
