目录

Flume

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。

2）需求分析

Flume 进阶案例 - 负载均衡和故障转移-最码农

3）实现步骤

（1）准备工作

在/opt/module/flume-1.9.0/jobs目录下创建group2文件夹


[hadoop@hadoop102 jobs]$ 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


[hadoop@hadoop102 group2]$ vim flume-netcat-flume.conf


# 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 = 6666

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。

编辑配置文件


[hadoop@hadoop102 group2]$ vim flume-flume-console1.conf


# 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。

编辑配置文件


[hadoop@hadoop102 group2]$ vim flume-flume-console2.conf


# 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。


flume-ng agent -c  $FLUME_HOME/conf  -f  $FLUME_HOME/jobs/group2/flume-flume-console2.conf -n a3 -Dflume.root.logger=INFO,console
flume-ng agent -c  $FLUME_HOME/conf  -f  $FLUME_HOME/jobs/group2/flume-flume-console1.conf -n a2 -Dflume.root.logger=INFO,console
flume-ng agent -c  $FLUME_HOME/conf  -f  $FLUME_HOME/jobs/group2/flume-netcat-flume.conf -n a1 -Dflume.root.logger=INFO,console

（6）使用netcat工具向本机的6666端口发送内容


nc localhost 6666

（7）查看Flume2及Flume3的控制台打印日志

Flume2

Flume 进阶案例 - 负载均衡和故障转移-最码农

Flume3

Flume 进阶案例 - 负载均衡和故障转移-最码农

（8）将Flume2 kill，观察Flume3的控制台打印情况。

Flume 进阶案例 - 负载均衡和故障转移-最码农

注：使用jps -ml查看Flume进程。