安装部署

1） Flume官网地址

http://flume.apache.org/

2）文档查看地址

http://flume.apache.org/FlumeUserGuide.html

3）下载地址

http://archive.apache.org/dist/flume/

安装：解压即可

命令：

# conf/为conf目录，name为文件内的应用名，file为应用的配置
bin/flume-ng agent -c conf/ -f job/mysource.conf -n a1 -Dflume.root.logger=INFO,console
bin/flume-ng agent --conf conf/ --name a3 --conf-file job/flume-taildir-hdfs.conf

修改/opt/module/flume/conf目录下的flume-env.sh配置：

JAVA_OPTS="
-Xms100m
-Xmx200m"

默认

概念

• agent：进程
  • source
  • channel
  • sink
• event：数据单元head+body
  • head：k=v
  • body：byte[]

事务

• put事务，source端
• take事务，sink端

ChannelSelector

在source配置，配合拦截器使用

• replicating(复制)
• multiplexing(多路复用)：根据条件发送至channel

#header为event中head的k，mapping后为对应的值
tier1.sources.source1.channels=channel1 channel2
tier1.sources.source1.selector.type=multiplexing
tier1.sources.source1.selector.header=flume.source
tier1.sources.source1.selector.mapping.app1=channel1
tier1.sources.source1.selector.mapping.app2=channel2

SinkProcessor

在sink配置

• DefaultSinkProcessor：默认，对应单个sink
• LoadBalancingSinkProcessor：负载均衡，对应sinkgroups
• FailoverSinkProcessor：容灾，对应sinkgroups

自定义Iterceptor

POM：

<dependency>
    <groupId>org.apache.flume</groupId>
    <artifactId>flume-ng-core</artifactId>
    <version>1.7.0</version>
</dependency>

• 继承Iterceptor接口
• 实现其方法
• 定义内部类实现Builder
  • Builder implements Interceptor.Builder
  • build方法返回自定义拦截器类
• 打包上传至flume的lib目录下，使用时要用全类名

自定义Source

继承AbstractSource类并实现Configurable和**PollableSource ** 接口

• getBackOffSleepIncrement()//休眠递增值
• getMaxBackOffSleepInterval()//休眠间歇
• configure(Context context)//初始化context（读取配置文件内容）
• process()//获取数据封装成event并写入channel，这个方法将被循环调用。

打包上传至flume的lib目录下，使用时要用全类名

自定义Sink

继承AbstractSink类并实现Configurable接口

实现相应方法：

• configure(Context context)//初始化context（读取配置文件内容）
• process()//从Channel读取获取数据（event），这个方法将被循环调用。

打包上传至flume的lib目录下，使用时要用全类名

监控

# 安装http和php
sudo yum -y install httpd php
sudo yum -y install rrdtool perl-rrdtool rrdtool-devel
sudo yum -y install apr-devel
# 安装ganglia
sudo rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
sudo yum -y install ganglia-gmetad
sudo yum -y install ganglia-web
sudo yum install -y ganglia-gmond

sudo vim /etc/httpd/conf.d/ganglia.conf

# Ganglia monitoring system php web frontend
Alias /ganglia /usr/share/ganglia
<Location /ganglia>
  Order deny,allow
  #Deny from all
  Allow from all
  # Allow from 127.0.0.1
  # Allow from ::1
  # Allow from .example.com
</Location>

sudo vim /etc/ganglia/gmetad.conf

data_source "hadoop102" 192.168.1.102

sudo vim /etc/ganglia/gmond.conf 
#修改为：
cluster {
  name = "hadoop102"
  owner = "unspecified"
  latlong = "unspecified"
  url = "unspecified"
}
udp_send_channel {
  #bind_hostname = yes # Highly recommended, soon to be default.
                       # This option tells gmond to use a source address
                       # that resolves to the machine's hostname.  Without
                       # this, the metrics may appear to come from any
                       # interface and the DNS names associated with
                       # those IPs will be used to create the RRDs.
  # mcast_join = 239.2.11.71
  host = 192.168.1.102
  port = 8649
  ttl = 1
}
udp_recv_channel {
  # mcast_join = 239.2.11.71
  port = 8649
  bind = 192.168.1.102
  retry_bind = true
  # Size of the UDP buffer. If you are handling lots of metrics you really
  # should bump it up to e.g. 10MB or even higher.
  # buffer = 10485760
}

sudo vim /etc/selinux/config
#修改为：
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted

selinux本次生效关闭必须重启，如果此时不想重启，可以临时生效之：

sudo setenforce 0

启动命令

sudo service httpd start
sudo service gmetad start
sudo service gmond start

打开网页浏览ganglia页面

http://192.168.1.102/ganglia

提示：如果完成以上操作依然出现权限不足错误，请修改/var/lib/ganglia目录的权限：

$ sudo chmod -R 777 /var/lib/ganglia

启动flume任务

bin/flume-ng agent \
--conf conf/ \
--name a1 \
--conf-file job/flume-netcat-logger.conf \
-Dflume.root.logger==INFO,console \
-Dflume.monitoring.type=ganglia \
-Dflume.monitoring.hosts=192.168.1.102:8649

永久生效

JAVA_OPTS=
"-Dflume.monitoring.type=ganglia
-Dflume.monitoring.hosts=192.168.1.102:8649
-Xms100m
-Xmx200m"