Asp.Net Session Provider can’t realize Master-Slave switching function, but the stable release of Redis Sentinel is shippedd since Redis 2.8. Certainly, the sentinel function is support Monitoring, Notification, Automatic failover and Configuration provider.

If you want to know the extra information about Redis Sentinel, –> click here

Aspnet Redis Provider

Source Code

Go back to session provider, I found an solution in github, the open source see here

  • If you just use redis make the session provider, this solution is completely instead of the Asp.Net session provider.
  • But if you want master-slave switching or mutltiple instance used in redis master-slave swtiching, I fork the project and checkout a new branch, the code –> see here

BTW, How to install redis and redis sentinel please see here, And the detail Redis Sentinel configuration for windows please see here

redis-master-slave-sentinel

Configuration for Application

PS. The sample web.config configuration for Redis Single

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<sessionState mode="Custom" customProvider="MySessionStateStore">
    <providers>
    <!--
    <add name="MySessionStateStore"
           host = "127.0.0.1" [String]
        port = "" [number]
        accessKey = "" [String]
        ssl = "false" [true|false]
        throwOnError = "true" [true|false]
        retryTimeoutInMilliseconds = "0" [number]
        databaseId = "0" [number]
        applicationName = "" [String]
        connectionTimeoutInMilliseconds = "5000" [number]
        operationTimeoutInMilliseconds = "5000" [number]
    />
    -->
    <add name="MySessionStateStore" type="Microsoft.Web.Redis.RedisSessionStateProvider" host="127.0.0.1" accessKey="" ssl="false"/>
    </providers>
</sessionState>

PS. The other sample web.config configuration for Redis Sentinel

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<connectionStrings>
	<add name="RedisConnection" connectionString="192.168.192.215:26379,192.168.192.205:26379,serviceName=mymaster,ssl=false" />
</connectionStrings>
<sessionState mode="Custom" customProvider="MySessionStateStore">
      <providers>
        <add name="MySessionStateStore" type="Microsoft.Web.Redis.RedisSessionStateProvider"
					connectionString="RedisConnection" operationTimeoutInMilliseconds="5000" />
      </providers>
</sessionState>

Question

Above this, I think a question about redis master ip when redis master instance is crash, how is it switched?
The answer in the Redis Sentinel configuration, because I input the redis sentinel ip and port in the web config, base on the quorum argument.

So, if I don’t change the source code, I can’t get the master ip when master instance crashed, but it’s other way to get the IP, Keepalived, It will generate the virtual IP, and you can bind your redis instances ip, Ahha It’s only support on linux, so this solution is not suitable for me.

And the detail configuration and How to realize it, please see this article

Resources:
http://lib.csdn.net/article/redis/18114