转载地址：https://www.slothparadise.com/how-to-install-ganglia-on-centos-7/
找了一堆文章，全都误导了，这篇正解。
总结步骤如下：
1、server端 ：
yum install -y ganglia-gmetad ganglia-web ganglia-gmond rrd-tool rrd-tool-devel
2、clent端
yum install -y ganglia-gmond
3、配置与分发
1)server : gmetad.conf
: gmond.conf
需要把所有的要监控节点的Ip信息写入udp_send，如：
cluster {
name = “buhpc”
owner = “unspecified”
latlong = “unspecified”
url = “unspecified”
}

udp_send_channel {
host = 1.buhpc.com
port = 8649
ttl = 1
}

udp_send_channel {
host = 2.buhpc.com
port = 8649
ttl = 1
}

udp_send_channel {
host = 3.buhpc.com
port = 8649
ttl = 1
}
udp_send_channel {
host = 4.buhpc.com
port = 8649
ttl = 1
}

udp_send_channel {
host = 5.buhpc.com
port = 8649
ttl = 1
}

udp_send_channel {
host = 6.buhpc.com
port = 8649
ttl = 1
}

udp_recv_channel {
port = 8649
retry_bind = true
}
2) client: 分发server端改好的gmond.conf至每个节点的 /etc/ganglia/目录下
4、重启服务
1）server: service gmetad start
service gmond start
service httpd start
2) client端：
service gmond start