Flume-负载均衡和故障转移案例

淩亂°似流年 2022-11-29 00:59 165阅读 0赞

### 文章目录 ###

*   *  负载均衡和故障转移

## 负载均衡和故障转移 ##

**1）案例需求**

使用Flume1监控一个端口，其sink组中的sink分别对接Flume2和Flume3，采用FailoverSinkProcessor，实现故障转移的功能。(轮询)

**2）需求分析**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMyNzI3MDk1_size_16_color_FFFFFF_t_70_pic_center]  
**3）实现步骤**

（1）准备工作

在 /opt/module/flume/job 目录下创建group2文件夹

[qinjl@hadoop102 job]$ cd group2/

（2）创建flume-netcat-flume.conf

配置1个netcat source和1个channel、1个sink group（2个sink），分别输送给`flume-flume-console1`和`flume-flume-console2`。

编辑配置文件

[qinjl@hadoop102 group2]$ vim flume-netcat-flume.conf
    
    添加如下内容
    # Name the components on this agent
    a1.sources = r1
    a1.channels = c1
    a1.sinkgroups = g1
    a1.sinks = k1 k2
    
    # Describe/configure the source
    a1.sources.r1.type = netcat
    a1.sources.r1.bind = localhost
    a1.sources.r1.port = 44444
    
    a1.sinkgroups.g1.processor.type = failover
    a1.sinkgroups.g1.processor.priority.k1 = 5
    a1.sinkgroups.g1.processor.priority.k2 = 10
    a1.sinkgroups.g1.processor.maxpenalty = 10000
    
    # Describe the sink
    a1.sinks.k1.type = avro
    a1.sinks.k1.hostname = hadoop102
    a1.sinks.k1.port = 4141
    
    a1.sinks.k2.type = avro
    a1.sinks.k2.hostname = hadoop102
    a1.sinks.k2.port = 4142
    
    # Describe the channel
    a1.channels.c1.type = memory
    a1.channels.c1.capacity = 1000
    a1.channels.c1.transactionCapacity = 100
    
    # Bind the source and sink to the channel
    a1.sources.r1.channels = c1
    a1.sinkgroups.g1.sinks = k1 k2
    a1.sinks.k1.channel = c1
    a1.sinks.k2.channel = c1

（3）创建flume-flume-console1.conf

配置上级Flume输出的Source，输出是到本地控制台。

[qinjl@hadoop102 group2]$ vim flume-flume-console1.conf
    
    添加如下内容
    # Name the components on this agent
    a2.sources = r1
    a2.sinks = k1
    a2.channels = c1
    
    # Describe/configure the source
    a2.sources.r1.type = avro
    a2.sources.r1.bind = hadoop102
    a2.sources.r1.port = 4141
    
    # Describe the sink
    a2.sinks.k1.type = logger
    
    # Describe the channel
    a2.channels.c1.type = memory
    a2.channels.c1.capacity = 1000
    a2.channels.c1.transactionCapacity = 100
    
    # Bind the source and sink to the channel
    a2.sources.r1.channels = c1
    a2.sinks.k1.channel = c1

（4）创建flume-flume-console2.conf

配置上级Flume输出的Source，输出是到本地控制台。

[qinjl@hadoop102 group2]$ vim flume-flume-console2.conf
    
    添加如下内容
    # Name the components on this agent
    a3.sources = r1
    a3.sinks = k1
    a3.channels = c2
    
    # Describe/configure the source
    a3.sources.r1.type = avro
    a3.sources.r1.bind = hadoop102
    a3.sources.r1.port = 4142
    
    # Describe the sink
    a3.sinks.k1.type = logger
    
    # Describe the channel
    a3.channels.c2.type = memory
    a3.channels.c2.capacity = 1000
    a3.channels.c2.transactionCapacity = 100
    
    # Bind the source and sink to the channel
    a3.sources.r1.channels = c2
    a3.sinks.k1.channel = c2

（5）执行配置文件

分别开启对应配置文件：flume-flume-console2，flume-flume-console1，flume-netcat-flume。

[qinjl@hadoop102 flume]$ bin/flume-ng agent --conf conf/ --name a3 --conf-file job/group2/flume-flume-console2.conf -Dflume.root.logger=INFO,console
    
    [qinjl@hadoop102 flume]$ bin/flume-ng agent --conf conf/ --name a2 --conf-file job/group2/flume-flume-console1.conf -Dflume.root.logger=INFO,console
    
    [qinjl@hadoop102 flume]$ bin/flume-ng agent --conf conf/ --name a1 --conf-file job/group2/flume-netcat-flume.conf

（6）使用netcat工具向本机的44444端口发送内容

[qinjl@hadoop102 flume]$ nc localhost 44444

（7）查看Flume2及Flume3的控制台打印日志  
![在这里插入图片描述][20200818210155996.png_pic_center]

*  注：使用jps -ml查看Flume进程。

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[20200818210155996.png_pic_center]: /images/20221124/7ea44b984eef4b5abd969b6f751f1d00.png