发布日期： 2009 年 4 月 13 日 级别： 中级 其他语言版本： 英文 访问情况 3254 次浏览 建议: 2 (查看或添加评论) <!-- Rating_Area_Begin --><!-- Ensure that div id is based on input id and ends with -widget -->
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安装 Ganglia
Internet 中有许多介绍如何安装 Ganglia 的文章和参考资料。我们将重新查看我在 xCAT 维基中撰写的一篇文章。我假定出于本文的目的，操作系统是 Red Hat 5 Update 2（但是对于其他企业 Linux 操作系统，这些步骤不会有很大差别）。
先决条件
假定您已经设置了 yum 库，安装先决条件在很大程度上应当十分简单。类似于以下代码：
cd /tmp/
wget http://oss.oetiker.ch/rrdtool/pub/rrdtool.tar.gz
tar zxvf rrdtool*
cd rrdtool-*
./configure --prefix=/usr
make -j8
make install
which rrdtool
ldconfig # make sure you have the new rrdtool libraries linked.
cd /tmp/
tar zxvf ganglia*gz
cd ganglia-3.1.1/
./configure --with-gmetad
make -j8
make install
您应当会退出，而不会遇到任何错误。如果看到错误，则可能需要检查缺少哪些库。
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配置 Ganglia
现在基本安装已完成，需要设置几个配置项才能运行。执行以下步骤：
处理命令行文件。
修改 /etc/ganglia/gmond.conf。
注意多宿主（multi-homed）计算机。
在管理服务器中启动它。
步骤 1：处理命令行文件
如下所示：
cd /tmp/ganglia-3.1.1/ # you should already be in this directory
mkdir -p /var/www/html/ganglia/ # make sure you have apache installed
cp -a web/* /var/www/html/ganglia/ # this is the web interface
cp gmetad/gmetad.init /etc/rc.d/init.d/gmetad # startup script
cp gmond/gmond.init /etc/rc.d/init.d/gmond
mkdir /etc/ganglia # where config files go
gmond -t | tee /etc/ganglia/gmond.conf # generate initial gmond config
cp gmetad/gmetad.conf /etc/ganglia/ # initial gmetad configuration
mkdir -p /var/lib/ganglia/rrds # place where RRDTool graphs will be stored
chown nobody:nobody /var/lib/ganglia/rrds # make sure RRDTool can write here.
chkconfig --add gmetad # make sure gmetad starts up at boot time
chkconfig --add gmond # make sure gmond starts up at boot time
步骤 2：修改 /etc/ganglia/gmond.conf
现在可以修改 /etc/ganglia/gmond.conf 以命名集群。假定集群名称为 “matlock”；则可以将 name = "unspecified" 更改为 name = "matlock"。
步骤 3：注意多宿主计算机
在我的集群中，eth0 是我的系统的公共 IP 地址。但是，监视服务器将通过 eth1 与私有集群网络中的节点进行通信。我需要确保 Ganglia 使用的多点传送将与 eth1 绑定在一起。这可以通过创建 /etc/sysconfig/network-scripts/route-eth1 文件来完成。添加 239.2.11.71 dev eth1 内容。
然后您可以使用 service network restart 重新启动网络并确保路由器显示此 IP 通过 eth1。注：您应当使用 239.2.11.71，因为这是 ganglia 的默认多点传送通道。如果使用其他通道或者增加更多通道，请更改它。
步骤 4：在管理服务器中启动它
现在您可以在监视服务器中完全启动它：
service gmond start
service gmetad start
service httpd restart
停止 Web 浏览器并将其指向位于 http://localhost/ganglia 的管理服务器。您将看到管理服务器现在处于受监视状态。您还将看到若干度量数据正受到监视并绘制曲线图。最有用的曲线图之一是您可以监视这台计算机中的负载情况。下面是我的计算机的负载情况图：
import os
def temp_handler(name):
# our commands we're going to execute
sdrfile = "/tmp/sdr.dump"
ipmitool = "/usr/bin/ipmitool"
# Before you run this Load the IPMI drivers:
# modprobe ipmi_msghandler
# modprobe ipmi_si
# modprobe ipmi_devintf
# you'll also need to change permissions of /dev/ipmi0 for nobody
# chown nobody:nobody /dev/ipmi0
# put the above in /etc/rc.d/rc.local
foo = os.path.exists(sdrfile)
if os.path.exists(sdrfile) != True:
os.system(ipmitool + ' sdr dump ' + sdrfile)
if os.path.exists(sdrfile):
ipmicmd = ipmitool + " -S " + sdrfile + " -c sdr"
else:
print "file does not exist... oops!"
ipmicmd = ipmitool + " -c sdr"
cmd = ipmicmd + " type temperature | sed 's/ /_/g' "
cmd = cmd + " | awk -F, '/Ambient/ {print $2}' "
#print cmd
entries = os.popen(cmd)
for l in entries:
line = l.split()
# print line
return int(line[0])
def metric_init(params):
global descriptors
temp = {'name': 'Ambient Temp',
'call_back': temp_handler,
'time_max': 90,
'value_type': 'uint',
'units': 'C',
'slope': 'both',
'format': '%u',
'description': 'Ambient Temperature of host through IPMI',
'groups': 'IPMI In Band'}
descriptors = [temp]
return descriptors
def metric_cleanup():
'''Clean up the metric module.'''
pass
#This code is for debugging and unit testing
if __name__ == '__main__':
metric_init(None)
for d in descriptors:
v = d['call_back'](d['name'])
print 'value for %s is %u' % (d['name'], v)
#!/usr/bin/perl
# vallard@us.ibm.com
use strict; # to keep things clean... er cleaner
use Socket; # to resolve host names into IP addresses
# code to clean up after forks
use POSIX ":sys_wait_h";
# nodeFile: is just a plain text file with a list of nodes:
# e.g:
# node01
# node02
# ...
# nodexx
my $nodeFile = "/usr/local/bin/nodes";
# gmetric binary
my $gmetric = "/usr/bin/gmetric";
#ipmitool binary
my $ipmi = "/usr/bin/ipmitool";
# userid for BMCs
my $u = "xcat";
# password for BMCs
my $p = "f00bar";
# open the nodes file and iterate through each node
open(FH, "$nodeFile") or die "can't open $nodeFile";
while(my $node = <FH>){
# fork so each remote data call is done in parallel
if(my $pid = fork()){
# parent process
next;
}
# child process begins here
chomp($node); # get rid of new line
# resolve node's IP address for spoofing
my $ip;
my $pip = gethostbyname($node);
if(defined $pip){
$ip = inet_ntoa($pip);
}else{
print "Can't get IP for $node!\n";
exit 1;
}
# check if the SDR cache file exists.
my $ipmiCmd;
unless(-f "/tmp/$node.sdr"){
# no SDR cache, so try to create it...
$ipmiCmd = "$ipmi -I lan -H $node-bmc -U $u -P $p sdr dump /tmp/$node.sdr";
`$ipmiCmd`;
}
if(-f "/tmp/$node.sdr"){
# run the command against the cache so that its faster
$ipmiCmd = "$ipmi -I lan -H $node-bmc -U $u -P $p -S /tmp/$node.sdr sdr type
Temperature ";
# put all the output into the @out array
my @out = `$ipmiCmd`;
# iterate through each @out entry.
foreach(@out){
# each output line looks like this:
# Ambient Temp | 32h | ok | 12.1 | 25 degrees C
# so we parse it out
chomp(); # get rid of the new line
# grap the first and 5th fields. (Description and Temp)
my ($descr, undef, undef, undef,$temp) = split(/\|/);
# get rid of white space in description
$descr =~ s/ //g;
# grap just the temp, (We assume C anyway)
$temp = (split(' ', $temp))[0];
# make sure that temperature is a number:
if($temp =~ /^\d+/ ){
#print "$node: $descr $temp\n";
my $gcmd = "$gmetric -n '$descr' -v $temp -t int16 -u Celcius -S $ip:$node";
`$gcmd`;
}
}
}
# Child Thread done and exits.
exit;
}
# wait for all forks to end...
while(waitpid(-1,WNOHANG) != -1){
1;
}
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