Ganglia分布式监控系统由三个部分组成：gmond gmetad ganglia-web。

• gmond->运行于需要监控的服务器上，用于收集数据，并传送给gmetad。gmond也可以收集其他gmond传送的数据。
• gmetad->运行于监控服务器上，用于收集并分析由gmond反馈的数据，然后存储于RRD存储引擎中。gmetad除了可以收集gmond的数据，也可以收集其他gmetad的数据，在分布式服务器中，会有多台gmetad。
• ganglia-web->web图形界面，与gmetad安装在同一台服务器上，用于从gmetad取数据，并读取RDD数据库，通过rrdtool生成图标以直观的形式表现出来。
  以下配置均在服务器selinux以及防火墙关闭状态下完成

安装ganglia，需要epel-release支持

yum -y install ganglia-gm{etad,ond}

配置gmetad

vim /etc/ganglia/gmetad.conf

data_source “my cluster” localhost改为data_source “my cluster” 10 localhost #默认使用8649端口
gridname “MyGrid”去掉#
xml_port 8651 去掉#
interactive_port 8652 去掉#
rrd_rootdir “/some/other/place”改为默认值rrd_rootdir “/var/lib/ganglia/rrds”

配置gmond

vim /etc/ganglia/gmond.conf

主要看globals这段

globals {
  daemonize = yes
  setuid = yes
  user = ganglia
  debug_level = 0
  max_udp_msg_len = 1472
  mute = no
  deaf = no
  allow_extra_data = yes
  host_dmax = 86400 /*secs. Expires (removes from web interface) hosts in 1 day */
  host_tmax = 20 /*secs */
  cleanup_threshold = 300 /*secs */
  gexec = no
  # By default gmond will use reverse DNS resolution when displaying your hostname
  # Uncommeting following value will override that value.
  # override_hostname = "mywebserver.domain.com"
  # If you are not using multicast this value should be set to something other than 0.
  # Otherwise if you restart aggregator gmond you will get empty graphs. 60 seconds is reasonable
  send_metadata_interval = 0 /*secs */
 
}
 
cluster {
  name = "unspecified"
  owner = "unspecified"
  latlong = "unspecified"
  url = "unspecified"
}
 
/* The host section describes attributes of the host, like the location */
host {
  location = "unspecified"
}
 
/* Feel free to specify as many udp_send_channels as you like.  Gmond
   used to only support having a single channel */
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
  port = 8649
  ttl = 1
}
 
/* You can specify as many udp_recv_channels as you like as well. */
udp_recv_channel {
  mcast_join = 239.2.11.71
  port = 8649
  bind = 239.2.11.71
  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
}
 
/* You can specify as many tcp_accept_channels as you like to share
   an xml description of the state of the cluster */
tcp_accept_channel {
  port = 8649
  # If you want to gzip XML output
  gzip_output = no
}

修改为

globals {
  daemonize = yes #是否后台运行
  setuid = yes #设置运行用户
  user = ganglia #运行用户
  debug_level = 0 #日志等级0，不输出任何信息
  max_udp_msg_len = 1472 
  mute = no #是否发送监控数据到其他节点
  deaf = no #是否接受其他节点发过来的监控数据
  allow_extra_data = yes #是否发送拓展数据
  host_dmax = 0 /*secs. Expires (removes from web interface) hosts in 1 day */ #是否删除一个节点，0代表不删除
  host_tmax = 20 /*secs */ #
  cleanup_threshold = 300 /*secs */  #gmond清理过期数据时间
  gexec = no
  # By default gmond will use reverse DNS resolution when displaying your hostname
  # Uncommeting following value will override that value.
  # override_hostname = "mywebserver.domain.com"
  # If you are not using multicast this value should be set to something other than 0.
  # Otherwise if you restart aggregator gmond you will get empty graphs. 60 seconds is reasonable
  send_metadata_interval = 0 /*secs */
 
}
 
cluster {
  name = "my cluster"  #群集名称，要和gmetad中的data_source一致
  owner = "admin" #节点管理者
  latlong = "unspecified" #极点坐标
  url = "unspecified" #节点URL地址
}
 
/* The host section describes attributes of the host, like the location */
host {
  location = "unspecified" #节点物理地址
}
 
/* Feel free to specify as many udp_send_channels as you like.  Gmond
   used to only support having a single channel */
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
  port = 8649
  ttl = 1
}
 
/* You can specify as many udp_recv_channels as you like as well. */
udp_recv_channel {
  mcast_join = 239.2.11.71
  port = 8649
  bind = 239.2.11.71
  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
}
 
/* You can specify as many tcp_accept_channels as you like to share
   an xml description of the state of the cluster */
tcp_accept_channel {
  port = 8649
  # If you want to gzip XML output
  gzip_output = no
}

要改的不多。

web配置

下载ganglia-web放置到nginx根目录即可，nginx配置不多赘述

wget https://jaist.dl.sourceforge.net/project/ganglia/ganglia-web/3.7.2/ganglia-web-3.7.2.tar.gz
cp conf_default.php conf.php

需要修改的有：

$conf['gweb_confdir'] = dirname(__FILE__); #ganglia-web的路径，改为PHP函数自动获取
$conf['gmetad_root'] = "/usr/lib64/ganglia"; #gmetad的安装路径
$conf['ganglia_ip'] = "127.0.0.1"; #gmetad服务器的地址
创建相关目录：

mkdir /usr/lib64/ganglia/rrds
mkdir /var/www/html/dwoo/{compiled,cache}
chown ganglia:ganglia -R /usr/lib64/ganglia/rrds
chown apache:apache -R /var/www/html/dwoo/{compiled,cache}

开启服务并访问测试

systemctl enable gmetad
systemctl start gmond
systemctl enable gmond
systemctl start gmond