开发者学堂课程【数据采集系统 Flume ：Flume 监控之 Ganglia】学习笔记，与课程紧密联系，让用户快速学习知识。
课程地址：https://developer.aliyun.com/learning/course/99/detail/1641
Flume 监控之 Ganglia
4.1 Ganglia 的安装与部署
1）安装 httpd 服务与 php
[atquigu@hadoop102 flume]s suda yum -y install httnd php
2）安装其他依赖
[atguigu@hadoop102 flume]$ sudo yum -y install rrdtool
perl- rrdtool rrdtool-devel
[atquigu@hadoop102 flume]$ sudo yum -y install apr-devel
3）安装 ganglia
[atguigu@hadoop102]
flume]$ sudo rpm -Uvh
http://dl.fedoraproject.org/pub/epel/6/x86_64/epe1-release-6-
8.noarch.rpm
[atguigu@hadoop102 flume]$ sudo yum -y install ganglia-gmetad
[atguiguehadoop102 flume]$ sudo yum -y install ganglia-web
[atguigu@hadoop102 flumelf sudo yum install -y ganglia-gmond
4）修改配置文件
/etc/httpd/conf.d/ganglia.conf
[atguigu@hadoop102 flume]$ sudo vim
/ets/httpd/sonf.d/ganglia.conf
修改为红颜色的配置：
# Ganglia monitoring system php web frontend
Alias /ganglia /usr/share/ganglia
Order deny,allow
Deny from all
Allow from all
# Allow from 127.0.0.1
# Allow from::1
# Allow from .example.com
5)修改配置文件
/ete/ganglia/gmetad.conf-
[atguigu@hadopp102 flume]$ sudo vim /etc/ganglia/gmetad.conf
修改为:
data_source "hadoop102"192.168.1.102。
6修改配置文件
/etc/ganglia/gmond.conf
[atguigu@hadoop102 flume]$sudo vim /etc/ganglia/gmond.conf
修改为：
cluster {
name ="hadoop102"
owner="unspecified"
latlong="unspecified"
url="unspecified"
｝
udp_send channel｛
#bind_hostname = yes # Highly recommended, soon to be default.
# This option tells gmond to use a source
address
#that resolves to the machine's host name.
Without
#this,the metrics may appear to come from
any
#interface and the DNS names associated with
#those IPs will be used to create the RRDs.
#mcast_jion =239.2.11.71
host=192.168.1.102
port=8649
ttl=1
｝
udp_recy_channel{
#mcast_join = 239.2.11.71
port= 8649.
bind = 192.168.1.102。
retry bind = true
# Size of the UDP buffer. If you are handling lots of metrics
you really
# should bump it up to e.g. 10MB or even higher.
#buffer= 10485760.
｝
7）修改配置文件
/etc/selinux/config
[atquigu@hadoop102.flume]$ sudo vim /etc/selinux/confiq
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.
尖叫提示： 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：
[atguigu@hadoop102 flume]$ sudo setenforce 0
8）启动 ganglia
[atguigu@hadoop102 flume]$ sudo service httpd start
[atguigu@hadoop102 flume]$
sudo service gmetad start
[atguigu@hadoop102 flume]$ sudo service gmond start。
9)打开网页浏览 ganglia 页面
尖叫提示：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：
[atguigu@hadoop102 flume]$ sudo chmod -R 777 /var/lib/ganglia
4.2 操作 Flume 测试监控
1）修改 /opt/module/flume/conf 目录下的 flume-env.sh 配置:
JAVA_OPTS="-Dflume.monitoring.type=ganglia
-Dflume.monitoring.hosts=192.168.1.102:8649
-Xms100m
-Xmx200m"
2）启动 Flume 任务
[atguigu@hadoop102 flume]$ bin/flume-ng agent \
--conf conf/ \
--name a1\
--conf-file job/flume-telnet-logger.conf \
-Dflume.root.logger==INFO,console \
-Dflume.monitoring.type=ganglia \
-Dflume.monitoring.hosts=192. 168.1.102：8 649.
3）发送数据观察 ganglia 监测图
[atguigu@hadoop102 flume]$ telnet localhost 44444
