Flume(5)-Ganglia监控

一. 安装Ganglia

1. 安装httpd服务与php

sudo yum -y install httpd php

2. 安装其他依赖

sudo yum -y install rrdtool perl-rrdtool rrdtool-devel
 
sudo yum -y install apr-devel

3. 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

Ganglia由gmond、gmetad和gweb三部分组成。

gmond（Ganglia Monitoring Daemon）是一种轻量级服务，安装在每台需要收集指标数据的节点主机上。使用gmond，你可以很容易收集很多系统指标数据，如CPU、内存、磁盘、网络和活跃进程的数据等。

gmetad（Ganglia Meta Daemon）整合所有信息，并将其以RRD格式存储至磁盘的服务。

gweb（Ganglia Web）Ganglia可视化工具，gweb是一种利用浏览器显示gmetad所存储数据的PHP前端。在Web界面中以图表方式展现集群的运行状态下收集的多种不同指标数据。

4. 修改配置文件

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

#修改为
# 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

#修改为
data_source "hadoop100" 192.168.1.100

sudo vim /etc/ganglia/gmond.conf

#修改为
cluster {
  name = "hadoop100"
  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 = 192.168.1.100
  port =
  ttl =
}
udp_recv_channel {
  # mcast_join = 239.2.11.71
  port =
  bind = 192.168.1.100
  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 =
}

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

#脱裤提醒 : 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 

5. 启动ganglia

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

6. 打开ganglia浏览页面

http://192.168.1.100/ganglia

脱裤提示：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  /var/lib/ganglia

二. 操作Flume测试监控

1. 修改配置文件

#修改/opt/module/flume/conf目录下的flume-env.sh配置：
JAVA_OPTS="-Dflume.monitoring.type=ganglia
-Dflume.monitoring.hosts=192.168.1.100:
-Xms100m
-Xmx200m"

2. 启动Flume任务

bin/flume-ng agent
--conf conf/--name a1
--conf-file jobs/flume-netcat-logger.conf
-Dflume.root.logger==INFO,console
-Dflume.monitoring.type=ganglia
-Dflume.monitoring.hosts=192.168.1.100:

3. 发送数据观察ganglia监测图

nc localhost 

图例说明:

字段（图表名称）	字段含义
EventPutAttemptCount	source尝试写入channel的事件总数量
EventPutSuccessCount	成功写入channel且提交的事件总数量
EventTakeAttemptCount	sink尝试从channel拉取事件的总数量。这不意味着每次事件都被返回，因为sink拉取的时候channel可能没有任何数据。
EventTakeSuccessCount	sink成功读取的事件的总数量
StartTime	channel启动的时间（毫秒）
StopTime	channel停止的时间（毫秒）
ChannelSize	目前channel中事件的总数量
ChannelFillPercentage	channel占用百分比
ChannelCapacity	channel的容量