4.1 Ganglia的安装与部署
1) 安装httpd服务与php
[atguigu@hadoop102 flume]$ sudo yum -y install httpd php
2) 安装其他依赖
[atguigu@hadoop102 flume]$ sudo yum -y install rrdtool perl-rrdtool rrdtool-devel [atguigu@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/epel-release-6-8.noarch.rpm [atguigu@hadoop102 flume]$ sudo yum -y install ganglia-gmetad [atguigu@hadoop102 flume]$ sudo yum -y install ganglia-web [atguigu@hadoop102 flume]$ sudo yum install -y ganglia-gmond
4) 修改配置文件/etc/httpd/conf.d/ganglia.conf
[atguigu@hadoop102 flume]$ 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>
5) 修改配置文件/etc/ganglia/gmetad.conf
[atguigu@hadoop102 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 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
}
7) 修改配置文件/etc/selinux/config
[atguigu@hadoop102 flume]$ 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
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
5) 启动ganglia
[atguigu@hadoop102 flume]$ sudo service httpd start [atguigu@hadoop102 flume]$ sudo service gmetad start [atguigu@hadoop102 flume]$ sudo service gmond start
6) 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=192.168.1.102:8649
3) 发送数据观察ganglia监测图
[atguigu@hadoop102 flume]$ telnet localhost 44444
样式如图：
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 |