集群监视软件Ganglia
什么是ganglia
Ganglia监控软件主要是用来监控系统性能的软件，如：cpu 、mem、硬盘利用率， I/O负载、网络流量情况等，通过曲线很容易见到每个节点的工作状态，对合理调整、分配系统资源，提高系统整体性能起到重要作用。
Ganglia的组成
ganglia 是分布式的监控系统，有两个Daemon, 分别是：客户端Ganglia Monitoring Daemon (gmond)和服务端Ganglia Meta Daemon (gmetad)
什么是PHP Web Frontend
Php Web Frontend 是Ganglia的一套基于php开发和运行的web统计浏览程序
什么是PHP
PHP是一个基于服务端来创建动态网站的脚本语言，您可以用PHP和HTML生成网站主页。当一个访问者打开主页时，服务端便执行PHP的命令并将执行结果发送至访问者的浏览器中，这类似于ASP和CoildFusion，然而PHP和他们不同之处在于PHP开放源码和跨越平台，PHP可以运行在WINDOWS NT和多种版本的UNIX上。它不需要任何预先处理而快速反馈结果，它也不需要mod_perl的调整来使您的服务器的内存映象减小。PHP消耗的资源较少，当PHP作为Apache Web服务器一部分时，运行代码不需要调用外部二进制程序，服务器不需要承担任何额外的负担。
什么是RRDtool
RRDtool是系统存放和显示time-series (即网络带宽、温度、人数、服务器负载等) ,并且它额可以绘出有用的图表用来显示处理的数据和数据密度。
相关资源
http://www.ganglia.info
Ganglia is a scalable distributed monitoring system for high-performance computing systems such as clusters and Grids. It is based on a hierarchical design targeted at federations of clusters. It relies on a multicast-based listen/announce protocol to monitor state within clusters and uses a tree of point-to-point connections amongst representative cluster nodes to federate clusters and aggregate their state. It leverages widely used technologies such as XML for data representation, XDR for compact, portable data transport, and RRDtool for data storage and visualization. It uses carefully engineered data structures and algorithms to achieve very low per-node overheads and high concurrency. The implementation is robust, has been ported to an extensive set of operating systems and processor architectures, and is currently in use on over 500 clusters around the world. It has been used to link clusters across university campuses and around the world and can scale to handle clusters with 2000 nodes.
The ganglia system is comprised of two unique daemons, a PHP-based web frontend and a few other small utility programs.
Ganglia Monitoring Daemon (gmond)
Gmond is a multi-threaded daemon which runs on each cluster node you want to monitor. Installation is easy. You don't have to have a common NFS filesystem or a database backend, install special accounts, maintain configuration files or other annoying hassles.
Gmond has four main responsibilities: monitor changes in host state, announce relevant changes, listen to the state of all other ganglia nodes via a unicast or multicast channel and answer requests for an XML description of the cluster state.
Each gmond transmits in information in two different ways: unicasting/multicasting host state in external data representation (XDR) format using UDP messages or sending XML over a TCP connection.
Ganglia Meta Daemon (gmetad)
Federation in Ganglia is achieved using a tree of point-to-point connections amongst representative cluster nodes to aggregate the state of multiple clusters. At each node in the tree, a Ganglia Meta Daemon (gmetad) periodically polls a collection of child data sources, parses the collected XML, saves all numeric, volatile metrics to round-robin databases and exports the aggregated XML over a TCP sockets to clients. Data sources may be either gmond daemons, representing specific clusters, or other gmetad daemons, representing sets of clusters. Data sources use source IP addresses for access control and can be specified using multiple IP addresses for failover. The latter capability is natural for aggregating data from clusters since each gmond daemon contains the entire state of its cluster.
Ganglia PHP Web Frontend
The Ganglia web frontend provides a view of the gathered information via real-time dynamic web pages. Most importantly, it displays Ganglia data in a meaningful way for system administrators and computer users. Although the web frontend to ganglia started as a simple HTML view of the XML tree, it has evolved into a system that keeps a colorful history of all collected data.
The Ganglia web frontend caters to system administrators and users. For example, one can view the CPU utilization over the past hour, day, week, month, or year. The web frontend shows similar graphs for Memory usage, disk usage, network statistics, number of running processes, and all other Ganglia metrics.
The web frontend depends on the existence of the gmetad which provides it with data from several Ganglia sources. Specifically, the web frontend will open the local port 8651 (by default) and expects to receive a Ganglia XML tree. The web pages themselves are highly dynamic; any change to the Ganglia data appears immediately on the site. This behavior leads to a very responsive site, but requires that the full XML tree be parsed on every page access. Therefore, the Ganglia web frontend should run on a fairly powerful, dedicated machine if it presents a large amount of data.
The Ganglia web frontend is written in the PHP scripting language, and uses graphs generated by gmetad to display history information. It has been tested on many flavours of Unix (primarily Linux) with the Apache webserver and the PHP 4.1 module.
http://www.php.net
PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.
http://www.rrdtool.org
RRD is the Acronym for Round Robin Database. RRD is a system to store and display time-series data (i.e. network bandwidth, machine-room temperature, server load average). It stores the data in a very compact way that will not expand over time, and it can create beautiful graphs. It can be used via simple shell scripts or as a perl module.
具体安装步骤
安装环境 Redhat AS3 update4 with Apache
安装软件 rrdtool-1.0.49 Ganglia3.0.1 PHP4.4.0 Ganglia-web-3.0.0-1
安装RRDTool
gmetad需要先安装RRDTool，默认的安装路径：/usr/local/rrdtool-1.0.49
Your_prompt>tar rrdtool.tar.gz
Your_prompt>cd rrdtool-1.0.49
Your_prompt>./configure
Your_prompt>make
Your_prompt>make install
更改rrdtool-1.0.49名称为rrdtool
Your_prompt>mv rrdtool-1.0.49 rrdtool
rrd.h in /usr/local/rrdtool/include/rrd.h
librrd.a in /usr/local/rrdtool/lib/librrd.a
Server端的安装和配置
gmetad的安装
gmetad不是默认安装的，安装时需要加参数 --with-gmetad 。即rrdtool库及其头文件必须存在，默认的路径是/usr/include/rrd.h和 /usr/lib/librrd.a，如果在安装rrdtool时安在了不同的路径下，这里需要指明它们的路径。
./configure CFLAGS="-I/rrd/header/path" CPPFLAGS="-I/rrd/header/path" /
LDFLAGS="-L/rrd/library/path" --with-gmetad
Your_prompt>tar –zxvf ganglia-3.0.1.tar.gz
Your_prompt>cd ganglia-3.0.1
Your_prompt>./configure CFLAGS="-I/rrd/header/usr/local/rrdtool/include/rrd.h"
CPPFLAGS="-I/rrd/header/usr/local/rrdtool/include/rrd.h "
LDFLAGS="-L/rrd/library/usr/local/rrdtool/lib/librrd.a " --with-gmetad
Your_prompt>make
Your_prompt>make install
为了保证在开始时启动，需要将gmetad.init文件拷贝到 /etc/rc.d/init.d/
Your_prompt> cd ganglia-3.0.1/gmetad
Your_prompt> cp gmetad.init /etc/rc.d/init.d/gmetad
将配置文件拷贝到/etc目录下
Your_prompt> cp gmetad.conf /etc/gmetad.conf
Add GMETAD to the list of programs at startup
Your_prompt> chkconfig --add gmetad
Your_prompt> chkconfig --list gmetad
GMETAD 0:off 1:off 2:on 3:on 4:on 5:on 6:off
启动gmetad
Your_prompt>/etc/rc.d/init.d/gmetad start
Starting GANGLIA gmetad: [ OK ]
Your_prompt>telnet localhost 8651 | grep “hostname”
就可以得到监控的各个主机的状态。
gmetad.conf的配置
# data_source "another source" 1.3.4.7:8655 1.3.4.8
data_source "SERVER" 10 node1 node2
data_source是最重要的参量，在GMOND的Cluser name配置必须与data_source的相同，这个参量被设置为群的名字，被监测以便能监测那群状态。如果有二个或更多监测对象，当有一对象不能被监测，将读取data_source 配置的下一个对象
client端安装和配置
Your_prompt>tar –zxvf ganglia-3.0.1.tar.gz
Your_prompt>cd ganglia-3.0.1
Your_prompt>./configure
Your_prompt>make
Your_prompt>make install
Your_prompt>cd gmond
Your_prompt>gmond –t > /etc/gmond.conf
Your_prompt>cp gmond.init /etc/rc.d/init.d/gmond
Your_prompt> chkconfig --add gmond
Your_prompt> chkconfig --list gmond
gmond 0:off 1:off 2:on 3:on 4:on 5:on 6:off
Your_prompt>/etc/rc.d/init.d/gmond start
Starting GANGLIA gmond: [ OK ]
Your_prompt>telnet localhost 8649 就可以获取机群内运行gmond的主机的信息
配置gmond.conf
vi /etc/gmond.conf
globals {
setuid = no
user = nobody
cleanup_threshold = 300 /*secs */
}
修改为
setuid = yes
user = scett #本机用户名
cluster {
name = "unspecified" #Cluser name
}
修改监控组名称
name = “SERVER”
配置完成后重新启动gmond.
安装php4.40
tar zxvf php-4.4.0.tar.gz
cd php-4.4.0
./configure --prefix=/usr/local/php --with-config-filepath=/usr/local/php --with-apxs2=/usr/local/httpd/bin/apxs --with-openssl=/usr/local/ssl
--with-mysql=/usr/local/mysql
make
make install
修改apache配置文件
Vi /etc/httpd/conf/httpd.conf
LoadModule php4_module extramodules/libphp4.so
AddModule mod_php4.c
AddType application/x-httpd-php .php .php4 .php3 .phtml
AddType application/x-httpd-php-source .phps
安装 php web frontend
rpm -Uvh ganglia-web-3.0.0-1.i386.rpm
最终通过 http://server/ganglia 访问页面如下
Ganglia监控软件主要是用来监控系统性能的软件，如：cpu 、mem、硬盘利用率， I/O负载、网络流量情况等，通过曲线很容易见到每个节点的工作状态，对合理调整、分配系统资源，提高系统整体性能起到重要作用。
Ganglia的组成
ganglia 是分布式的监控系统，有两个Daemon, 分别是：客户端Ganglia Monitoring Daemon (gmond)和服务端Ganglia Meta Daemon (gmetad)
什么是PHP Web Frontend
Php Web Frontend 是Ganglia的一套基于php开发和运行的web统计浏览程序
什么是PHP
PHP是一个基于服务端来创建动态网站的脚本语言，您可以用PHP和HTML生成网站主页。当一个访问者打开主页时，服务端便执行PHP的命令并将执行结果发送至访问者的浏览器中，这类似于ASP和CoildFusion，然而PHP和他们不同之处在于PHP开放源码和跨越平台，PHP可以运行在WINDOWS NT和多种版本的UNIX上。它不需要任何预先处理而快速反馈结果，它也不需要mod_perl的调整来使您的服务器的内存映象减小。PHP消耗的资源较少，当PHP作为Apache Web服务器一部分时，运行代码不需要调用外部二进制程序，服务器不需要承担任何额外的负担。
什么是RRDtool
RRDtool是系统存放和显示time-series (即网络带宽、温度、人数、服务器负载等) ,并且它额可以绘出有用的图表用来显示处理的数据和数据密度。
相关资源
http://www.ganglia.info
Ganglia is a scalable distributed monitoring system for high-performance computing systems such as clusters and Grids. It is based on a hierarchical design targeted at federations of clusters. It relies on a multicast-based listen/announce protocol to monitor state within clusters and uses a tree of point-to-point connections amongst representative cluster nodes to federate clusters and aggregate their state. It leverages widely used technologies such as XML for data representation, XDR for compact, portable data transport, and RRDtool for data storage and visualization. It uses carefully engineered data structures and algorithms to achieve very low per-node overheads and high concurrency. The implementation is robust, has been ported to an extensive set of operating systems and processor architectures, and is currently in use on over 500 clusters around the world. It has been used to link clusters across university campuses and around the world and can scale to handle clusters with 2000 nodes.
The ganglia system is comprised of two unique daemons, a PHP-based web frontend and a few other small utility programs.
Ganglia Monitoring Daemon (gmond)
Gmond is a multi-threaded daemon which runs on each cluster node you want to monitor. Installation is easy. You don't have to have a common NFS filesystem or a database backend, install special accounts, maintain configuration files or other annoying hassles.
Gmond has four main responsibilities: monitor changes in host state, announce relevant changes, listen to the state of all other ganglia nodes via a unicast or multicast channel and answer requests for an XML description of the cluster state.
Each gmond transmits in information in two different ways: unicasting/multicasting host state in external data representation (XDR) format using UDP messages or sending XML over a TCP connection.
Ganglia Meta Daemon (gmetad)
Federation in Ganglia is achieved using a tree of point-to-point connections amongst representative cluster nodes to aggregate the state of multiple clusters. At each node in the tree, a Ganglia Meta Daemon (gmetad) periodically polls a collection of child data sources, parses the collected XML, saves all numeric, volatile metrics to round-robin databases and exports the aggregated XML over a TCP sockets to clients. Data sources may be either gmond daemons, representing specific clusters, or other gmetad daemons, representing sets of clusters. Data sources use source IP addresses for access control and can be specified using multiple IP addresses for failover. The latter capability is natural for aggregating data from clusters since each gmond daemon contains the entire state of its cluster.
Ganglia PHP Web Frontend
The Ganglia web frontend provides a view of the gathered information via real-time dynamic web pages. Most importantly, it displays Ganglia data in a meaningful way for system administrators and computer users. Although the web frontend to ganglia started as a simple HTML view of the XML tree, it has evolved into a system that keeps a colorful history of all collected data.
The Ganglia web frontend caters to system administrators and users. For example, one can view the CPU utilization over the past hour, day, week, month, or year. The web frontend shows similar graphs for Memory usage, disk usage, network statistics, number of running processes, and all other Ganglia metrics.
The web frontend depends on the existence of the gmetad which provides it with data from several Ganglia sources. Specifically, the web frontend will open the local port 8651 (by default) and expects to receive a Ganglia XML tree. The web pages themselves are highly dynamic; any change to the Ganglia data appears immediately on the site. This behavior leads to a very responsive site, but requires that the full XML tree be parsed on every page access. Therefore, the Ganglia web frontend should run on a fairly powerful, dedicated machine if it presents a large amount of data.
The Ganglia web frontend is written in the PHP scripting language, and uses graphs generated by gmetad to display history information. It has been tested on many flavours of Unix (primarily Linux) with the Apache webserver and the PHP 4.1 module.
http://www.php.net
PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML.
http://www.rrdtool.org
RRD is the Acronym for Round Robin Database. RRD is a system to store and display time-series data (i.e. network bandwidth, machine-room temperature, server load average). It stores the data in a very compact way that will not expand over time, and it can create beautiful graphs. It can be used via simple shell scripts or as a perl module.
具体安装步骤
安装环境 Redhat AS3 update4 with Apache
安装软件 rrdtool-1.0.49 Ganglia3.0.1 PHP4.4.0 Ganglia-web-3.0.0-1
安装RRDTool
gmetad需要先安装RRDTool，默认的安装路径：/usr/local/rrdtool-1.0.49
Your_prompt>tar rrdtool.tar.gz
Your_prompt>cd rrdtool-1.0.49
Your_prompt>./configure
Your_prompt>make
Your_prompt>make install
更改rrdtool-1.0.49名称为rrdtool
Your_prompt>mv rrdtool-1.0.49 rrdtool
rrd.h in /usr/local/rrdtool/include/rrd.h
librrd.a in /usr/local/rrdtool/lib/librrd.a
Server端的安装和配置
gmetad的安装
gmetad不是默认安装的，安装时需要加参数 --with-gmetad 。即rrdtool库及其头文件必须存在，默认的路径是/usr/include/rrd.h和 /usr/lib/librrd.a，如果在安装rrdtool时安在了不同的路径下，这里需要指明它们的路径。
./configure CFLAGS="-I/rrd/header/path" CPPFLAGS="-I/rrd/header/path" /
LDFLAGS="-L/rrd/library/path" --with-gmetad
Your_prompt>tar –zxvf ganglia-3.0.1.tar.gz
Your_prompt>cd ganglia-3.0.1
Your_prompt>./configure CFLAGS="-I/rrd/header/usr/local/rrdtool/include/rrd.h"
CPPFLAGS="-I/rrd/header/usr/local/rrdtool/include/rrd.h "
LDFLAGS="-L/rrd/library/usr/local/rrdtool/lib/librrd.a " --with-gmetad
Your_prompt>make
Your_prompt>make install
为了保证在开始时启动，需要将gmetad.init文件拷贝到 /etc/rc.d/init.d/
Your_prompt> cd ganglia-3.0.1/gmetad
Your_prompt> cp gmetad.init /etc/rc.d/init.d/gmetad
将配置文件拷贝到/etc目录下
Your_prompt> cp gmetad.conf /etc/gmetad.conf
Add GMETAD to the list of programs at startup
Your_prompt> chkconfig --add gmetad
Your_prompt> chkconfig --list gmetad
GMETAD 0:off 1:off 2:on 3:on 4:on 5:on 6:off
启动gmetad
Your_prompt>/etc/rc.d/init.d/gmetad start
Starting GANGLIA gmetad: [ OK ]
Your_prompt>telnet localhost 8651 | grep “hostname”
就可以得到监控的各个主机的状态。
gmetad.conf的配置
# data_source "another source" 1.3.4.7:8655 1.3.4.8
data_source "SERVER" 10 node1 node2
data_source是最重要的参量，在GMOND的Cluser name配置必须与data_source的相同，这个参量被设置为群的名字，被监测以便能监测那群状态。如果有二个或更多监测对象，当有一对象不能被监测，将读取data_source 配置的下一个对象
client端安装和配置
Your_prompt>tar –zxvf ganglia-3.0.1.tar.gz
Your_prompt>cd ganglia-3.0.1
Your_prompt>./configure
Your_prompt>make
Your_prompt>make install
Your_prompt>cd gmond
Your_prompt>gmond –t > /etc/gmond.conf
Your_prompt>cp gmond.init /etc/rc.d/init.d/gmond
Your_prompt> chkconfig --add gmond
Your_prompt> chkconfig --list gmond
gmond 0:off 1:off 2:on 3:on 4:on 5:on 6:off
Your_prompt>/etc/rc.d/init.d/gmond start
Starting GANGLIA gmond: [ OK ]
Your_prompt>telnet localhost 8649 就可以获取机群内运行gmond的主机的信息
配置gmond.conf
vi /etc/gmond.conf
globals {
setuid = no
user = nobody
cleanup_threshold = 300 /*secs */
}
修改为
setuid = yes
user = scett #本机用户名
cluster {
name = "unspecified" #Cluser name
}
修改监控组名称
name = “SERVER”
配置完成后重新启动gmond.
安装php4.40
tar zxvf php-4.4.0.tar.gz
cd php-4.4.0
./configure --prefix=/usr/local/php --with-config-filepath=/usr/local/php --with-apxs2=/usr/local/httpd/bin/apxs --with-openssl=/usr/local/ssl
--with-mysql=/usr/local/mysql
make
make install
修改apache配置文件
Vi /etc/httpd/conf/httpd.conf
LoadModule php4_module extramodules/libphp4.so
AddModule mod_php4.c
AddType application/x-httpd-php .php .php4 .php3 .phtml
AddType application/x-httpd-php-source .phps
安装 php web frontend
rpm -Uvh ganglia-web-3.0.0-1.i386.rpm
最终通过 http://server/ganglia 访问页面如下