尚硅谷大数据技术之Flume(新）第4章 Flume监控之Ganglia
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
修改为红颜色的配置：
# 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
