Difference between revisions of "Cacti"

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A web frontend to RRDtool's[http://oss.oetiker.ch/rrdtool/doc/rrdtool.en.html] data storage and graphing functionality. Can be accessed at ''https://okra.unh.edu/cacti/''.
+
A web frontend to RRDtool's[http://oss.oetiker.ch/rrdtool/doc/rrdtool.en.html] data storage and graphing functionality. <br>
 +
'''Since Okra is no longer there, this has been moved to Roentgen''' <br>
 +
Can be accessed at ''http://roentgen.unh.edu/cacti/''.
 
== Graphing Servers ==
 
== Graphing Servers ==
−
= Client Configuration =
+
=== Client Configuration ===
 +
 
 +
== External Links ==
 +
* [http://docs.cacti.net/ New, official documentation site]
 +
* Official Manual: [http://www.cacti.net/documentation.php Documentation] [http://www.cacti.net/downloads/docs/html/ HTML Docs] Only useful for general setup and advanced topics -- not much about in-between or debugging
 +
* Documentation of the SensorHawk (which can be coupled with Cacti): [http://www.enviromon.net/resources/user_guides.html User Guides]
 +
* Our Cacti: [https://okra.unh.edu/cacti/]
 +
 
 +
= Setting up Cacti on Roentgen =
 +
 
 +
This is the setup for Cacti on Roentgen (Centos 5 webserver system, a virtual node under Xen on Pumpkin). I looked at [http://www.cacti.net/downloads/docs/contrib/Cacti-Linux-How-To.pdf Cacti Linux Howto] but used yum and packages instead of wget and make.
 +
 
 +
* Add the database to Mysql
 +
** Database: create database cactidb;
 +
** Users permissions: grant * on cactidb to root, cactiuser and maurik
 +
* Install rrdtool, net-snmp, cacti using "yum".
 +
** Note that the install of cacti automatically creates the "cactiuser" and "cacti" group.
 +
* Create link from /var/www/physics/cacti to /var/www/cacti (so you can get there with http://roentgen.unh.edu/cacti )
 +
* Execute: mysql --user=root --password=rootpw cactidb < cacti.sql
 +
* Check that the poller is running in crontab: */5 * * * * cacti php /var/www/cacti/poller.php &>/dev/null
 +
* Now go with the browser to http://roentgen.unh.edu/cacti
 +
* Follow directions. Set the log file to /var/log/cacti.log
 +
* Create new user, "npglinux" with the same password as the rhn.redhat.com site. This user is an admin.
 +
* Up and running. Next - create stuff to poll.
 +
 
 +
Quick one on testing if a system has any snmp capabilities:
 +
 
 +
Read temp 1 from SensorHawk:
 +
snmpget  -v 1  10.0.0.98  -c public .1.3.6.1.4.1.3854.1.2.2.1.16.1.3.0
 +
SNMPv2-SMI::enterprises.3854.1.2.2.1.16.1.3.0 = INTEGER: 22
 +
 
 +
Read stuff from pumpkin (logged in on pumpkin)
 +
snmpwalk -v 1 localhost -c public .1.3.6.1.2.1.1
 +
SNMPv2-MIB::sysDescr.0 = STRING: Linux pumpkin.unh.edu 2.6.18-92.1.22.el5xen #1 SMP Fri Dec 5 09:58:39 EST 2008 x86_64
 +
SNMPv2-MIB::sysObjectID.0 = OID: NET-SNMP-MIB::netSnmpAgentOIDs.10
 +
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (4296) 0:00:42.96
 +
SNMPv2-MIB::sysContact.0 = STRING: NPG Admins <npg-admins@einstein.unh.edu>
 +
SNMPv2-MIB::sysName.0 = STRING: pumpkin.unh.edu
 +
SNMPv2-MIB::sysLocation.0 = STRING: Durham, NH, USA, University of New Hampshire, DeMeritt Hall
 +
SNMPv2-MIB::sysORLastChange.0 = Timeticks: (15) 0:00:00.15
 +
SNMPv2-MIB::sysORID.1 = OID: SNMPv2-MIB::snmpMIB
 +
SNMPv2-MIB::sysORID.2 = OID: TCP-MIB::tcpMIB
 +
SNMPv2-MIB::sysORID.3 = OID: IP-MIB::ip
 +
SNMPv2-MIB::sysORID.4 = OID: UDP-MIB::udpMIB
 +
SNMPv2-MIB::sysORID.5 = OID: SNMP-VIEW-BASED-ACM-MIB::vacmBasicGroup
 +
SNMPv2-MIB::sysORID.6 = OID: SNMP-FRAMEWORK-MIB::snmpFrameworkMIBCompliance
 +
SNMPv2-MIB::sysORID.7 = OID: SNMP-MPD-MIB::snmpMPDCompliance
 +
SNMPv2-MIB::sysORID.8 = OID: SNMP-USER-BASED-SM-MIB::usmMIBCompliance
 +
SNMPv2-MIB::sysORDescr.1 = STRING: The MIB module for SNMPv2 entities
 +
SNMPv2-MIB::sysORDescr.2 = STRING: The MIB module for managing TCP implementations
 +
SNMPv2-MIB::sysORDescr.3 = STRING: The MIB module for managing IP and ICMP implementations
 +
SNMPv2-MIB::sysORDescr.4 = STRING: The MIB module for managing UDP implementations
 +
SNMPv2-MIB::sysORDescr.5 = STRING: View-based Access Control Model for SNMP.
 +
SNMPv2-MIB::sysORDescr.6 = STRING: The SNMP Management Architecture MIB.
 +
SNMPv2-MIB::sysORDescr.7 = STRING: The MIB for Message Processing and Dispatching.
 +
SNMPv2-MIB::sysORDescr.8 = STRING: The management information definitions for the SNMP User-based Security Model.
 +
SNMPv2-MIB::sysORUpTime.1 = Timeticks: (13) 0:00:00.13
 +
SNMPv2-MIB::sysORUpTime.2 = Timeticks: (13) 0:00:00.13
 +
SNMPv2-MIB::sysORUpTime.3 = Timeticks: (13) 0:00:00.13
 +
SNMPv2-MIB::sysORUpTime.4 = Timeticks: (13) 0:00:00.13
 +
SNMPv2-MIB::sysORUpTime.5 = Timeticks: (13) 0:00:00.13
 +
SNMPv2-MIB::sysORUpTime.6 = Timeticks: (15) 0:00:00.15
 +
SNMPv2-MIB::sysORUpTime.7 = Timeticks: (15) 0:00:00.15
 +
SNMPv2-MIB::sysORUpTime.8 = Timeticks: (15) 0:00:00.15
 +
 
 +
= Older problems =
 +
 
 +
Things to keep in mind.
 +
 
 
== Issue with log filling up ==
 
== Issue with log filling up ==
 
Since cacti polls frequently, if a machine or a machine's data source is unresponsive, the log file will fill up rapidly with a lot of this:
 
Since cacti polls frequently, if a machine or a machine's data source is unresponsive, the log file will fill up rapidly with a lot of this:
Line 34: Line 104:
  
 
Creating a fresh log file exposes some additional functionality in cacti. The big benefit of this is that now we can see which host numbers corespond to which machines, among other things, just by clicking the links.  This is mainly useful for finding out what data sources aren't working, so that they can be disabled.
 
Creating a fresh log file exposes some additional functionality in cacti. The big benefit of this is that now we can see which host numbers corespond to which machines, among other things, just by clicking the links.  This is mainly useful for finding out what data sources aren't working, so that they can be disabled.
−
 
−
== External Links ==
 
−
* [http://docs.cacti.net/ New, official documentation site]
 
−
* Official Manual: [http://www.cacti.net/downloads/docs/html/] Only useful for general setup and advanced topics -- not much about in-between or debugging
 
−
* Our Cacti: [https://okra.unh.edu/cacti/]
 

Latest revision as of 15:48, 21 May 2009

A web frontend to RRDtool's[1] data storage and graphing functionality.
Since Okra is no longer there, this has been moved to Roentgen
Can be accessed at http://roentgen.unh.edu/cacti/.

Graphing Servers

Client Configuration

External Links

Setting up Cacti on Roentgen

This is the setup for Cacti on Roentgen (Centos 5 webserver system, a virtual node under Xen on Pumpkin). I looked at Cacti Linux Howto but used yum and packages instead of wget and make.

  • Add the database to Mysql
    • Database: create database cactidb;
    • Users permissions: grant * on cactidb to root, cactiuser and maurik
  • Install rrdtool, net-snmp, cacti using "yum".
    • Note that the install of cacti automatically creates the "cactiuser" and "cacti" group.
  • Create link from /var/www/physics/cacti to /var/www/cacti (so you can get there with http://roentgen.unh.edu/cacti )
  • Execute: mysql --user=root --password=rootpw cactidb < cacti.sql
  • Check that the poller is running in crontab: */5 * * * * cacti php /var/www/cacti/poller.php &>/dev/null
  • Now go with the browser to http://roentgen.unh.edu/cacti
  • Follow directions. Set the log file to /var/log/cacti.log
  • Create new user, "npglinux" with the same password as the rhn.redhat.com site. This user is an admin.
  • Up and running. Next - create stuff to poll.

Quick one on testing if a system has any snmp capabilities:

Read temp 1 from SensorHawk: 

snmpget  -v 1  10.0.0.98  -c public .1.3.6.1.4.1.3854.1.2.2.1.16.1.3.0
SNMPv2-SMI::enterprises.3854.1.2.2.1.16.1.3.0 = INTEGER: 22

Read stuff from pumpkin (logged in on pumpkin) 

snmpwalk -v 1 localhost -c public .1.3.6.1.2.1.1
SNMPv2-MIB::sysDescr.0 = STRING: Linux pumpkin.unh.edu 2.6.18-92.1.22.el5xen #1 SMP Fri Dec 5 09:58:39 EST 2008 x86_64
SNMPv2-MIB::sysObjectID.0 = OID: NET-SNMP-MIB::netSnmpAgentOIDs.10
DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (4296) 0:00:42.96
SNMPv2-MIB::sysContact.0 = STRING: NPG Admins <npg-admins@einstein.unh.edu>
SNMPv2-MIB::sysName.0 = STRING: pumpkin.unh.edu
SNMPv2-MIB::sysLocation.0 = STRING: Durham, NH, USA, University of New Hampshire, DeMeritt Hall
SNMPv2-MIB::sysORLastChange.0 = Timeticks: (15) 0:00:00.15
SNMPv2-MIB::sysORID.1 = OID: SNMPv2-MIB::snmpMIB
SNMPv2-MIB::sysORID.2 = OID: TCP-MIB::tcpMIB
SNMPv2-MIB::sysORID.3 = OID: IP-MIB::ip
SNMPv2-MIB::sysORID.4 = OID: UDP-MIB::udpMIB
SNMPv2-MIB::sysORID.5 = OID: SNMP-VIEW-BASED-ACM-MIB::vacmBasicGroup
SNMPv2-MIB::sysORID.6 = OID: SNMP-FRAMEWORK-MIB::snmpFrameworkMIBCompliance
SNMPv2-MIB::sysORID.7 = OID: SNMP-MPD-MIB::snmpMPDCompliance
SNMPv2-MIB::sysORID.8 = OID: SNMP-USER-BASED-SM-MIB::usmMIBCompliance
SNMPv2-MIB::sysORDescr.1 = STRING: The MIB module for SNMPv2 entities
SNMPv2-MIB::sysORDescr.2 = STRING: The MIB module for managing TCP implementations
SNMPv2-MIB::sysORDescr.3 = STRING: The MIB module for managing IP and ICMP implementations
SNMPv2-MIB::sysORDescr.4 = STRING: The MIB module for managing UDP implementations
SNMPv2-MIB::sysORDescr.5 = STRING: View-based Access Control Model for SNMP.
SNMPv2-MIB::sysORDescr.6 = STRING: The SNMP Management Architecture MIB.
SNMPv2-MIB::sysORDescr.7 = STRING: The MIB for Message Processing and Dispatching.
SNMPv2-MIB::sysORDescr.8 = STRING: The management information definitions for the SNMP User-based Security Model.
SNMPv2-MIB::sysORUpTime.1 = Timeticks: (13) 0:00:00.13
SNMPv2-MIB::sysORUpTime.2 = Timeticks: (13) 0:00:00.13
SNMPv2-MIB::sysORUpTime.3 = Timeticks: (13) 0:00:00.13
SNMPv2-MIB::sysORUpTime.4 = Timeticks: (13) 0:00:00.13
SNMPv2-MIB::sysORUpTime.5 = Timeticks: (13) 0:00:00.13
SNMPv2-MIB::sysORUpTime.6 = Timeticks: (15) 0:00:00.15
SNMPv2-MIB::sysORUpTime.7 = Timeticks: (15) 0:00:00.15
SNMPv2-MIB::sysORUpTime.8 = Timeticks: (15) 0:00:00.15

Older problems

Things to keep in mind.

Issue with log filling up

Since cacti polls frequently, if a machine or a machine's data source is unresponsive, the log file will fill up rapidly with a lot of this: 

06/19/2007 03:10:04 PM - CMDPHP: Poller[0] Host[3] DS[303] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:04 PM - CMDPHP: Poller[0] Host[3] DS[303] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[310] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[311] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[321] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[322] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[323] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[324] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[324] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[348] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[322] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[321] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[323] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:05 PM - CMDPHP: Poller[0] Host[6] DS[348] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:07 PM - CMDPHP: Poller[0] Host[13] DS[195] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:07 PM - CMDPHP: Poller[0] Host[13] DS[196] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:08 PM - CMDPHP: Poller[0] Host[13] DS[349] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:09 PM - CMDPHP: Poller[0] Host[13] DS[350] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:09 PM - CMDPHP: Poller[0] Host[15] DS[362] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:09 PM - CMDPHP: Poller[0] Host[15] DS[363] WARNING: Result from SNMP not valid.  Partial Result: 
06/19/2007 03:10:10 PM - SYSTEM STATS: Time:8.3451 Method:cmd.php Processes:1 Threads:N/A Hosts:11 HostsPerProcess:11 DataSources:202 RRDsProcessed:106

If there's too much in the log file, the web interface won't load it. "Clear Cacti Log File" under "System Utilities" should take care of this, but it gives an error when I try: 

Clear Cacti Log File
Error: Unable to clear log, no write permissions.

It is necessary to log into okra as root and clear the log by running 

sudo -u cacti rm cacti.log
sudo -u cacti touch cacti.log

To reduce the noise, disable the non-functioning data sources (don't delete them).

Creating a fresh log file exposes some additional functionality in cacti. The big benefit of this is that now we can see which host numbers corespond to which machines, among other things, just by clicking the links. This is mainly useful for finding out what data sources aren't working, so that they can be disabled.

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