Instalando Cacti no CentOS 5


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Instalando Cacti no CentOS 5

  1. 1. Installing Cacti on CentOS 5 | Linux Foundation Training Events Video More search Try our NEW BETA Search! Home News Linux Community Learn Linux Directory Jobs Store Video Home Linux Community Community Blogs Installing Cacti on CentOS 5 Home Tags Search Feed Blog Entries For the community by the community Installing Cacti on CentOS 5 Posted by: Ross Larson on August 14 2009 Tagged in: Untagged 0 tweet Like 4 people like this. Cacti is a GPL-licensed, scalable, RRDtool-based monitoring program with flexible graphing options. This article describes the process of installing and configuring Cacti on CentOS 5.2. Useful links to this installation were BXtra and TechDB. Per the Cacti documentation, Cacti requires: RRDTool 1.0.49 or 1.2.x or greater MySQL 4.1.x or 5.x or greater PHP 4.3.6 or greater, 5.x greater highly recommended for advanced features Latest Blog Posts A Web Server e.g. Apache or IIS A Unity-Inspired "Dock" dixiedancer Id also recommend installing vim, net-snmp, net-snmp-utils, php-snmp, initscripts, perl-rrdtool, and any dependencies. Man vs Machine: Virtuali ... by RSims To perform this install, I am logged into Gnome as a normal user, and opened a terminal that is switched to openSUSE Weekly New the root user using the su command. I had already installed apache, mysql, and PHP during the original saigkill install process of CentOS 5.2. Two Years on Linux: Les I added a new repository to facilitate this install. To do this, I created a file dixiedancer (/etc/yum.repos.d/dag.repo) containing Dag Wiers repository, which contains rrdtool, among other things. Convert ext2 to ext3 file s blueprintlinux1 de 7 22/7/2011 11:40
  2. 2. Installing Cacti on CentOS 5 | [dag] name=Dag RPM Repository for Red Hat Enterprise Linux baseurl= gpgcheck=1 gpgkey= enabled=1 You can create this file by typing vim /etc/yum.repos.d/dag.repo and copying and pasting the above information into the file. Be warned that the above text containing the repository is version and Find out more a architecture-specific. I then typed yum update to update CentOS and the repository list before installing additional software. Blog Categories I installed everything but cacti through yum. You can verify that you have the packages in question (or the Business (or Enter version numbers of installed packages) by attempting to install them, as yum will remind you that you already Desktops (87) have the latest version installed, as well as the version status of the packages, like shown here: Distributions (155) General Linux (125 # yum install php httpd mysql mysql-server php-mysql vim-enhanced net-snmp net-snmp-utils php-snmp Mobile (38) initscripts perl-rrdtool rrdtool initscripts Personal (131) Loaded plugins: fastestmirror, priorities Servers (59) Loading mirror speeds from cached hostfile * base: * updates: Blog Archive * addons: * extras: July 2011 Setting up Install Process June 2011 Parsing package install arguments May 2011 Package php-5.1.6-23.2.el5_3.i386 already installed and latest version April 2011 Package httpd-2.2.3-22.el5.centos.1.i386 already installed and latest version March 2011 Package mysql-5.0.45-7.el5.i386 already installed and latest version February 2011 Package mysql-server-5.0.45-7.el5.i386 already installed and latest version January 2011 Package php-mysql-5.1.6-23.2.el5_3.i386 already installed and latest version December 2010 Package 2:vim-enhanced-7.0.109-4.el5_2.4z.i386 already installed and latest version November 2010 Package 1:net-snmp- already installed and latest version October 2010 Package 1:net-snmp-utils- already installed and latest version September 2010 Package php-snmp-5.1.6-23.2.el5_3.i386 already installed and latest version August 2010 Package initscripts-8.45.25-1.el5.centos.i386 already installed and latest version July 2010 Package perl-rrdtool-1.3.7-1.el5.rf.i386 already installed and latest version June 2010 Package rrdtool-1.3.7-1.el5.rf.i386 already installed and latest version May 2010 Package initscripts-8.45.25-1.el5.centos.i386 already installed and latest version April 2010 Nothing to do March 2010 February 2010 January 2010 December 2009 Download the latest version of Cacti (0.8.7e, as of the writing of this article) from here. I downloaded it to my November 2009 desktop and unzipped it by right clicking it and selecting "Extract here". I also renamed the cacti-0.8.7e October 2009 directory by right clicking and selecting "Rename". You could do this in the command line, if you wanted to: September 2009 August 2009 [your root shell] # tar xzvf cacti-0.8.7e.tar.gz July 2009 [your root shell] # mv cacti-0.8.7e cacti June 2009 Move the entire cacti directory to /var/www/html/ : May 2009 April 2009 [your root shell] # mv cacti /var/www/html August 2008 I chose to create a cactiuser user (and cacti group) to run cacti commands and to have ownership of the June 2008 relavent cacti files. It was here that I noticed that my install did not have any of the /sbin directories in its $PATH , so I simply typed the absolute path: [your root shell] # /usr/sbin/groupadd cacti2 de 7 22/7/2011 11:40
  3. 3. Installing Cacti on CentOS 5 | [your root shell] # /usr/sbin/useradd -g cacti cactiuser Linux Jobs [your root shell] # passwd cactiuser Test Analyst - Java, L Change the ownership of the /var/www/html/cacti/rra/ and /var/www/html/cacti/log/ HiTech Personnel A d directories to the cactiuser we just created: Australia [your root shell] # cd /var/www/html/cacti Systems Engineer Lin [your root shell] # chown -R cactiuser rra/ log/ Vantage, Sydney, Syd Senior Systems Engin Create a mysql root password, if you havent already (password in this example is samplepass: Talent International, S [your root shell] # /usr/bin/mysqladmin -u root password samplepass QA/Test Engineer - Li iKas International, Sy Create a MySQL database for cacti: Systems Engineer Lin [your root shell] # mysqladmin --user=root --password=samplepass create cacti Vantage, Sydney, Syd More jobs | Post a job Change directories to the cacti directory, and use the cacti.sql file to create tables for your database: [your root shell] # cd /var/www/html/cacti [your root shell- cacti] # mysql --user=root --password=samplepass cacti < cacti.sql I also created a MySQL username and password for Cacti: [your root shell] # mysql --user=root --password=samplepass Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 28 Server version: 5.0.45 Source distribution Type help; or h for help. Type c to clear the buffer. mysql> GRANT ALL ON cacti.* TO cactiuser@localhost IDENTIFIED BY samplepass; Query OK, 0 rows affected (0.00 sec) mysql> flush privileges; Query OK, 0 rows affected (0.00 sec) mysql> exit Bye Edit /var/www/html/cacti/include/config.php with your favorite editor, and update the information to reflect our cacti configuration (you can leave the other text in the file alone): /* make sure these values refect your actual database/host/user/password */ $database_type = "mysql"; $database_default = "cacti"; $database_hostname = "localhost"; $database_username = "cactiuser"; $database_password = "samplepass"; $database_port = "3306"; Create a cron job that polls for information for Cacti (Im choosing to use /etc/crontab here):3 de 7 22/7/2011 11:40
  4. 4. Installing Cacti on CentOS 5 | [your root shell] # vim /etc/crontab Add this line to your crontab: */5 * * * * cactiuser /usr/bin/php /var/www/html/cacti/poller.php > /dev/null 2>&1 Edit your PHP config file at /etc/php.ini to allow more memory usage for Cacti. It is a relatively large text file- using vim, I search for "memory_limit" by typing /memory_limit in command mode. [your root shell] # vim /etc/php.ini I changed memory_limit = 8M to memory_limit = 128M Before I check to see if Cacti works, I want to check and see if mysqld and httpd are running using the service command. [your root shell] # /sbin/service mysqld status [your root shell] # /sbin/service httpd status If mysqld and httpd are running, great. If not, type: [your root shell] # /sbin/service mysqld start [your root shell] # /sbin/service httpd start If youre an "I need to see what the output looks like" type, here is an example of the previous command: [your root shell] # /sbin/service mysqld status mysqld is stopped [your root shell] # /sbin/service mysqld start Initializing MySQL database: Installing MySQL system tables... OK Filling help tables... OK To start mysqld at boot time you have to copy support-files/mysql.server to the right place for your system PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER ! To do so, start the server, then issue the following commands: /usr/bin/mysqladmin -u root password new-password /usr/bin/mysqladmin -u root -h localhost.localdomain password new-password See the manual for more instructions. You can start the MySQL daemon with: cd /usr ; /usr/bin/mysqld_safe & You can test the MySQL daemon with cd mysql-test ; perl Please report any problems with the /usr/bin/mysqlbug script! The latest information about MySQL is available on the web at Support MySQL by buying support/licenses at [ OK ] Starting MySQL: [ OK ]4 de 7 22/7/2011 11:40
  5. 5. Installing Cacti on CentOS 5 | You should now be able to access cacti at http://localhost/cacti from the local computer or from any computer within your LAN network at http://your.internal.IP.address/cacti . There should be a Cacti Installation Guide window that shows up, giving licensing info and the like. Click "Next". Select "New Installation", since this is a new installation. The next window to pop up should tell you whether Cacti could find the paths to all of the elements that Cacti needs to run, such as RRDtool, PHP, snmp stuff, etc. If everything but Cacti was installed via yum, you should be good here. Click "Finish" to save the settings and bring up the login window. Below is a screenshot of the login window. The default user name is admin. The default password is admin. It should prompt an automatic password change for the admin account when you log in the first time. If you successfully log in, Id recommend taking a break here. Depending on how fast you are, your cron job may not have had enough time to run the poller program and create data for your graphs. Id suggest taking a deep breath, or brewing a cup of tea (or coffee) for yourself. The localhost machine should have some graph templates that are already created, but you can click the "Create Additional Devices" link to add graphs for any other machines on your network. I added my FreeNAS box (tutorial for that to follow). After having consumed your beverage of choice, press the "Graphs" button. Cacti should have a graph showing you a couple minutes of data for the machines you have added. The longer your machine is on, the more informational the graphs will be. Also, if you click on a particular graph, Cacti will Congratulations! Youre now monitoring! View the Cacti documentation page for more information on how to take advantages of Cacti. Below are some graphs that were made using Cacti.5 de 7 22/7/2011 11:40
  6. 6. Installing Cacti on CentOS 5 | Visit for more blog posts! Report Spam Email this Share This Set as favorite Comments (3) Subscribe to this comments feed Show/hide comments Thanks - few corrections written by Steven Kenney, September 15, 2009 Thanks for this excellent article. I do have a few corrections for you to make though Following your instructions directly didnt work. To grant permission to the database we need to change this GRANT ALL ON cacti.* TO cactiuser@localhost IDENTIFIED BY cacti; to this GRANT ALL ON cacti.* TO cactiuser@localhost IDENTIFIED BY SAMPLEPASS; Meaning we put the wrong password in there as cacti was not the password recommended in the6 de 7 22/7/2011 11:40
  7. 7. Installing Cacti on CentOS 5 | include.php also you could do without one MV on this [your root shell] # mv mv cacti /var/www/html Also need to point out that mysqld needed to be started ahead of time before you could do some of these configuration changes. So it was already started. +1 ... written by Ross Larson, September 15, 2009 Good catch! You are correct that cacti should have been samplepass, and mv should have only appeared once, as such: [your root shell] # mv cacti /var/www/html I fell victim to some sloppy copying from my terminal there. Sorry about that! I have updated the article to reflect the correct information. Thank you for the reply! +0 ... written by Ross Larson, September 15, 2009 You are also correct that mysqld should be running when you call the service command. I stopped mysqld specifically to show what the output would look like if for some crazy reason it wasnt on. -1 Write comment Show/hide comment form You must be logged in to post a comment. Please register if you do not have an account yet. WHO WE ARE ? EXPLORE STAY CURRENT The Linux Foundation is a non-profit Answers Netbooks consortium dedicated to the growth of Blogs Cloud Computing Linux. Forums Enterprise More About the foundation... Directory Embedded & Mobile Frequent Questions Join / Linux Training / Board Copyright © 2011 All Rights Reserved. de 7 22/7/2011 11:40