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-develsudo 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.rpmsudo yum -y install ganglia-gmetad sudo yum -y install ganglia-websudo 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 frontendAlias /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 = 8649 ?ttl = 1}udp_recv_channel { ?# mcast_join = 239.2.11.71 ?port = 8649 ?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 = 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
#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 0
5. 启动ganglia
sudo service httpd startsudo service gmetad startsudo 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 777 /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=192.168.1.102:8649-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=192.168.1.100:8649
3. 发送数据观察ganglia监测图
nc localhost 44444
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 |
Flume(5)-Ganglia监控
原文地址：https://www.cnblogs.com/duoduotouhenying/p/10221742.html