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.confdata_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 本文由 Ethan 创作，采用 知识共享署名4.0 国际许可协议进行许可。
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