搭建ganglia集群而且监视hadoop CDH4.6

前言

近期在研究云监控的相关工具,感觉ganglia颇有亮点,能从一个集群总体的角度来展现数据. 但是安装过程稍过复杂,相关依赖稍多,故写此文章与大家分享下.

本文不解说相关原理,若想了解请參考其它资料.

本文目的: 即使之前未触过ganglia,也能依照文中步骤搭建自己的ganglia监控集群.

@Author duangr

@Website http://my.oschina.net/duangr/blog/181585

1.相关环境

Host Name	IP	OS	Arch
master	192.168.1.201	CentOS 6.4	x86_64
slave1	192.168.1.202	CentOS 6.4	x86_64
slave2	192.168.1.203	CentOS 6.4	x86_64

所有主机确认:

• iptables关闭

• SELinux disabled

2.部署规划

项	值
监控服务主节点	master
被监控从节点	slave1 slave2

Ganglia监控服务的主节点须要安装:

• ganglia

• ganglia-web

• php

• apache

Ganglia被监控从节点须要安装:

• ganglia

安装路径规划

项	值
ganglia安装路径	/usr/local/ganglia
php安装路径	/usr/local/php
apache安装路径	/usr/local/apache2
ganglia-web安装路径	/export/home/ganglia/ganglia-web-3.5.10
rrds数据路径	/var/lib/ganglia/rrdtool

3.代码获取

• ganglia-3.6.0.tar.gz

• ganglia-web-3.5.12.tar.gz

• httpd-2.2.23.tar.gz

• php-5.4.10.tar.gz

4.前提依赖

4.1 主机环境检查(所有主机节点)

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1. # rpm -q gcc glibc glibc-common rrdtool rrdtool-devel apr  apr-devel expat expat-devel  pcre pcre-devel dejavu-lgc-sans-mono-fonts dejavu-sans-mono-fonts
2. gcc-4.4.7-3.el6.x86_64
3. glibc-2.14.1-6.x86_64
4. glibc-common-2.14.1-6.x86_64
5. rrdtool-1.3.8-6.el6.x86_64
6. rrdtool-devel-1.3.8-6.el6.x86_64
7. apr-1.3.9-5.el6_2.x86_64
8. apr-devel-1.3.9-5.el6_2.x86_64
9. expat-2.0.1-11.el6_2.x86_64
10. expat-devel-2.0.1-11.el6_2.x86_64
11. pcre-7.8-6.el6.x86_64
12. pcre-devel-7.8-6.el6.x86_64
13. dejavu-lgc-sans-mono-fonts-2.30-2.el6.noarch.rpm
14. dejavu-sans-mono-fonts-2.30-2.el6.noarch.rpm

若有缺失,请先安装. 可通过例如以下几个镜像站点下载相关安装包:

• http://rpm.pbone.net/

• http://mirrors.163.com/centos/6.4/os/x86_64/Packages/

• http://mirrors.sohu.com/centos/6.4/os/x86_64/Packages/

4.2 dejavu

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1. rpm -ivh dejavu-lgc-sans-mono-fonts-2.30-2.el6.noarch.rpm
2. rpm -ivh dejavu-sans-mono-fonts-2.30-2.el6.noarch.rpm

4.3 rrdtool

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1. rpm -ivh rrdtool-1.3.8-6.el6.x86_64.rpm
2. rpm -ivh rrdtool-devel-1.3.8-6.el6.x86_64.rpm

4.4 apr

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1. rpm -ivh apr-1.3.9-5.el6_2.x86_64.rpm
2. rpm -ivh apr-devel-1.3.9-5.el6_2.x86_64.rpm

4.5 libexpat

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1. rpm -ivh expat-2.0.1-11.el6_2.x86_64.rpm
2. rpm -ivh expat-devel-2.0.1-11.el6_2.x86_64.rpm

4.6 libpcre

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1. rpm -ivh pcre-7.8-6.el6.x86_64.rpm
2. rpm -ivh pcre-devel-7.8-6.el6.x86_64.rpm

4.7 confuse

confuse-2.7  http://www.nongnu.org/confuse/

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1. tar -zxf confuse-2.7.tar.gz
2. cd confuse-2.7
3. ./configure CFLAGS=-fPIC --disable-nls
4. make && make install

4.8 python

Python-2.7.3.tar.bz2   http://www.python.org/

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1. tar -jxf Python-2.7.3.tar.bz2
2. ./configure  --prefix=/usr/local  --enable-shared
3. make && make install

配置共享库

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1. vi /etc/ld.so.conf
2. -- 添加例如以下内容
3. /usr/local/lib

启用配置

ldconfig

检查是否生效

ldconfig -v |grep "libpython2.7.so"

5.编译安装

5.1 安装ganglia (所有节点都要安装)

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1. # tar -zxf ganglia-3.6.0.tar.gz
2. # cd ganglia-3.6.0
3. # ./configure --prefix=/usr/local/ganglia --with-gmetad --enable-gexec --with-python=/usr/local
4. Welcome to..
5. ______                  ___
6. / ____/___ _____  ____ _/ (_)___ _
7. / / __/ __ `/ __ \/ __ `/ / / __ `/
8. / /_/ / /_/ / / / / /_/ / / / /_/ /
9. \____/\__,_/_/ /_/\__, /_/_/\__,_/
10. /____/
11. Copyright (c) 2005 University of California, Berkeley
12. Version: 3.6.0
13. Library: Release 3.6.0 0:0:0
14. Type "make" to compile.
15. # make && make install

5.2 安装ganglia-web (主节点安装)

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1. # tar -zxf ganglia-web-3.5.12.tar.gz -C /export/home/ganglia/
2. # cd /export/home/ganglia/ganglia-web-3.5.12
3. # cp conf_default.php conf.php

vi conf.php    调整为例如以下内容

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1. $conf['gweb_confdir'] = "/var/www/html/ganglia";
2. $conf['gmetad_root'] = "/var/www/html";

vi header.php

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1. <?php
2. session_start();
3. ini_set('date.timezone','PRC');      --改动时区为本地时区
4. if (isset($_GET['date_only'])) {
5. $d = date("r");
6. echo $d;
7. exit(0);
8. }

配置暂时文件夹

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1. cd /var/www/html/ganglia-web-3.5.12/dwoo
2. mkdir cache
3. chmod 777 cache
4. mkdir compiled
5. chmod 777 compiled

5.3 安装apache (主节点安装)

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1. tar -zxf httpd-2.2.23.tar.gz
2. cd httpd-2.2.23
3. ./configure --prefix=/usr/local/apache2
4. make && make install

5.4 安装php (主节点安装)

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1. tar -zxf php-5.4.10.tar.gz
2. cd php-5.4.10
3. ./configure --prefix=/usr/local/php  --with-apxs2=/usr/local/apache2/bin/apxs  --with-mysql=/usr
4. make  && make install

注：在实际安装过程中，我採用的是

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1. yum -y install httpd php

通过一条命令，就可以安装成功apache httpd 和 php支持，简单方便。

依照以上的安装方式, 配置出来的默认网站文件夹为/var/www/html/。新建一个php脚本info.php：

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1. <?php
2. phpinfo();
3. ?>

訪问http://localhost/info.php成功的话，即说明成功安装。

5.5 使用apache公布ganglia-web (主节点安装)

vi /usr/local/apache2/conf/httpd.conf

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1. ....
2. Listen 80
3. ....
4. <IfModule dir_module>
5. DirectoryIndex index.html index.php
6. AddType application/x-httpd-php .php
7. </IfModule>
8. ....
9. # 在文件最后添加例如以下内容
10. # ganglia
11. Alias /ganglia "/var/www/html/ganglia"
12. <Directory "/var/www/html/ganglia">
13. AuthType Basic
14. Options None
15. AllowOverride None
16. Order allow,deny
17. Allow from all
18. </Directory>

启动httpd服务

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1. /usr/local/apache2/bin/apachectl restart

6.配置Ganglia

6.1 配置gmetad (主节点配置)

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1. cd ganglia-3.6.0
2. cp ./gmetad/gmetad.init /etc/init.d/gmetad
3. cp ./gmetad/gmetad.conf /usr/local/ganglia/etc/

vi /etc/init.d/gmetad  --改动例如以下内容

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1. GMETAD=/usr/local/ganglia/sbin/gmetad

vi /usr/local/ganglia/etc/gmetad.conf     -- 改动例如以下内容

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1. data_source "hadoop-cluster" 10 master  slave1  slave2
2. xml_port 8651
3. interactive_port 8652
4. rrd_rootdir "/var/lib/ganglia/rrds"
5. case_sensitive_hostnames 0

改动rrds数据文件夹全部者

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1. chown -R nobody:nobody /var/lib/ganglia/rrds

启动gmetad服务,并设为开机自己主动执行

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1. service gmetad restart
2. chkconfig --add gmetad

6.2 配置gmond (所有节点配置)

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1. cd ganglia-3.6.0
2. cp ./gmond/gmond.init /etc/init.d/gmond
3. ./gmond/gmond -t > /usr/local/ganglia/etc/gmond.conf

vi /etc/init.d/gmond  --改动例如以下内容

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1. GMOND=/usr/local/ganglia/sbin/gmond

vi /usr/local/ganglia/etc/gmond.conf      -- 改动例如以下内容

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1. cluster {
2. name = "hadoop-cluster"
3. owner = "nobody"
4. latlong = "unspecified"
5. url = "unspecified"
6. }

复制python module到ganglia部署文件夹

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1. mkdir /usr/local/ganglia/lib64/ganglia/python_modules
2. cp ./gmond/python_modules/*/*.py  /usr/local/ganglia/lib64/ganglia/python_modules

安装程序ganglia-3.6.0默认提供了一些python module的配置文件,仅仅须要部署到 /usr/local/ganglia/etc/conf.d 文件夹以下就可以生效

若对默认提供的这些监控脚本不太关心,能够跳过以下这步:

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1. cp ./gmond/python_modules/conf.d/*.pyconf  /usr/local/ganglia/etc/conf.d

启动gmond服务,并设为开机自己主动执行

service gmond restart

chkconfig --add gmond

6.3 将ganglia_web放到/var/www/html/文件夹以下

      运行cp /export/home/ganglia/ganglia-web-3.5.12/* /var/www/html/ganglia

7.监控页面

http://192.168.1.201/ganglia/

8.与CDH4.6的整合

CDH中hadoop配置文件不少。为了整合ganglia，须要编辑文件hadoop-metrics2.properties。从/etc/hadoop/conf.dist复制相关文件到

$hadoop_conf文件夹下。

cp /etc/hadoop/conf.dist/hadoop-metrics2.properties /etc/hadoop/conf

在hadoop-metrics2.properties中加入

#

# Below are for sending metrics to Ganglia

#

# for Ganglia 3.0 support

# *.sink.ganglia.class=org.apache.hadoop.metrics2.sink.ganglia.GangliaSink30

#

# for Ganglia 3.1 support

*.sink.ganglia.class=org.apache.hadoop.metrics2.sink.ganglia.GangliaSink31

*.sink.ganglia.period=10



# default for supportsparse is false

*.sink.ganglia.supportsparse=true

*.sink.ganglia.slope=jvm.metrics.gcCount=zero,jvm.metrics.memHeapUsedM=both

*.sink.ganglia.dmax=jvm.metrics.threadsBlocked=70,jvm.metrics.memHeapUsedM=40

namenode.sink.ganglia.servers=239.2.11.71:8649

datanode.sink.ganglia.servers=239.2.11.71:8649

#jobtracker.sink.ganglia.servers=239.2.11.71:8649

#tasktracker.sink.ganglia.servers=239.2.11.71:8649

resourcemanager.sink.ganglia.servers=239.2.11.71:8649

nodemanager.sink.ganglia.servers=239.2.11.71:8649

maptask.sink.ganglia.servers=239.2.11.71:8649

reducetask.sink.ganglia.servers=239.2.11.71:8649

#dfs.class=org.apache.hadoop.metrics.spi.NullContextWithUpdateThread

# add

dfs.class=org.apache.hadoop.metrics.ganglia.GangliaContext31

dfs.period=10

dfs.servers=239.2.11.71:8649



mapred.class=org.apache.hadoop.metrics.ganglia.GangliaContext31

mapred.period=10

mapred.servers=239.2.11.71:8649



#jvm.class=org.apache.hadoop.metrics.spi.NullContextWithUpdateThread

#jvm.period=300



jvm.class=org.apache.hadoop.metrics.ganglia.GangliaContext31

jvm.period=10

jvm.servers=239.2.11.71:8649

当中server和port的确定从/usr/local/ganglia/etc/gmond.conf得到

/* 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

}

mcast_join = 239.2.11.71则确定了server地址，是一个ganglia 用来发送xml格式文件信息的组播地址，是固定的，哪一点节点配置都是这个地址。port=8649这里能够看到。如此。我们重新启动hadoop服务。就可从ganglia界面看到监控画面。

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如今就配置好了ganglia监控cdh4.6了。