Mrtg + Snmp远程监控配置

1. Install SNMP

   yum install net-snmp-utils net-snmp

2. SNMP Configuration

   vi /etc/snmp/snmpd.conf

   Find the following Line:

   com2sec notConfigUser  default       public

   Replace with the following lines:

   com2sec local     localhost           public
   com2sec mynetwork 192.168.0.0/24      public

   Find Lines:

   group   notConfigGroup v1           notConfigUser
   group   notConfigGroup v2c           notConfigUser

   Replace with:

   group MyRWGroup v1         local
   group MyRWGroup v2c        local
   group MyRWGroup usm        local
   group MyROGroup v1         mynetwork
   group MyROGroup v2c        mynetwork
   group MyROGroup usm        mynetwork

   Find line:

   view    systemview     included      system

   Replace with:

   view all    included  .1

   Find line:

   access  notConfigGroup ""      any       noauth    exact  systemview none none

   Replace with:

   access MyROGroup ""      any       noauth    exact  all    none   none
   access MyRWGroup ""      any       noauth    exact  all    all    none

   Find lines:

   syslocation Unknown (edit /etc/snmp/snmpd.conf)
   syscontact Root  (configure /etc/snmp/snmp.local.conf)

   Replace with:

   syslocation Linux (CentOs6.5)
   syscontact YourNameHere <[email protected]>

3. Start up SNMP

   service snmpd start
   chkconfig snmpd on

   Test your snmp server with following line:

   snmpwalk -v 1 -c public localhost IP-MIB::ipAdEntIfIndex

4. Install MRTG

   yum install mrtg
   mkdir -p /var/www/html/mymrtg/
   cfgmaker --global 'WorkDir: /var/www/html/mymrtg' --output /etc/mrtg/mymrtg.cfg public@localhost
   cp -av /var/www/mrtg/*.png /var/www/html/mymrtg/

5. Configure MRTG

   vi /etc/mrtg/mymrtg.cfg

   Make sure the following content are in the file

   EnableIPv6: no
   WorkDir:/var/www/html/mymrtg
   # Reload page every 5 minute 
   Refresh:300   
   # Call mrtg every 5 minute
   Interval:5
   
   ### Monitoring CPU Load[use+free]
   
   Target[cpuload]: .1.3.6.1.4.1.2021.11.50.0&.1.3.6.1.4.1.2021.11.53.0:public@localhost:
   Directory[cpuload]: cpu
   Options[cpuload]: nopercent,growright
   MaxBytes[cpuload]: 100
   Unscaled[cpuload]: dwym
   YLegend[cpuload]: CPU Utilization
   ShortLegend[cpuload]: %
   Legend1[cpuload]: CPU Usage(%)
   Legend2[cpuload]: CPU Free(%)
   LegendI[cpuload]: Used:
   LegendO[cpuload]: Free:
   Title[cpuload]: CPU Load(Use+Free)
   PageTop[cpuload]:<h1>CPU Load(Use+Free)</h1>
   
   ### Monitoring server load(1/5 minute average)
   
   Target[load]: .1.3.6.1.4.1.2021.10.1.3.1&.1.3.6.1.4.1.2021.10.1.3.2:public@localhost:
   Options[load]: growright
   Directory[load]: dev_load
   MaxBytes[load]: 10
   Unscaled[load]: dwym
   YLegend[load]: Server Load
   ShortLegend[load]: 
   Legend1[load]: 1 min Average
   Legend2[load]: 5 mins Average
   LegendI[load]: 1 min Average
   LegendO[load]: 5 mins Average
   Title[load]: Developer Server Load(1/5 minute average)
   PageTop[Load]:<h1>Developer Server Load(1/5 minute average)</h1>
   
   ### Monitoring Used Memory and Swap [Mem+Swap] free -k
   
   Target[memory]: .1.3.6.1.2.1.25.2.3.1.6.3&.1.3.6.1.2.1.25.2.3.1.6.10:public@localhost:
   Directory[memory]: memory
   Options[memory]: gauge,growright
   MaxBytes1[memory]: 8003360
   MaxBytes2[memory]: 1048572
   Kmg[memory]: K,M,G
   Kilo[memory]: 1024
   Unscaled[memory]: dwym
   YLegend[memory]: Mem Bytes
   ShortLegend[memory]: B
   Legend1[memory]: Used Mem(Bytes)
   Legend2[memory]: Used Swap(Bytes)
   LegendI[memory]: Used Mem
   LegendO[memory]: Used Swap
   Title[memory]: Memory Usage(Mem+Swap)
   PageTop[memory]:<h1>Memory Usage(Mem+Swap)</h1>
   
   ### Moniting disk size [/+/var]   df -k
   
   Target[disk]: .1.3.6.1.4.1.2021.9.1.9.1&.1.3.6.1.4.1.2021.9.1.9.2:public@localhost:
   # +.1.3.6.1.4.1.2021.9.1.9.3&.1.3.6.1.4.1.2021.9.1.9.4:public@localhost:
   Options[disk]: gauge,growright,nopercent
   Directory[disk]: disk
   MaxBytes[disk]: 100
   Unscaled[disk]: dwym
   YLegend[disk]: Utilization
   ShortLegend[disk]: %
   Legend1[disk]: / Usage
   Legend2[disk]: /var Usage
   #Legend3[disk]: /boot Usage
   #Legend4[disk]: /usr Usage
   LegendI[disk]: / Usage
   LegendO[disk]: /var Usage
   Title[disk]: Disk Space(/+/var)
   PageTop[disk]:<h1>Disk Space(/+/var)</h1>
   
   ### Monitoring TCP connections (per minute)
   
   Target[connection]: .1.3.6.1.2.1.6.6.0&.1.3.6.1.2.1.6.5.0:public@localhost:
   Options[connection]: growright,perminute,nopercent
   Directory[connection]: connection
   MaxBytes[connection]: 1000000
   ShortLegend[connection]: c/s
   YLegend[connection]: Conns / Min
   Legend1[connection]: New inbound connections
   Legend2[connection]: New outbound connections
   LegendI[connection]: In
   LegendO[connection]: Out
   Title[connection]: New TCP Connections
   PageTop[connection]:<h1>New TCP Connections</h1> 
   
   ### Established TCP connections
   
   Target[Econnection]: .1.3.6.1.2.1.6.9.0&.1.3.6.1.2.1.6.9.0:public@localhost:
   Options[Econnection]: growright,nopercent,gauge
   Directory[Econnection]: EstablishedConnections
   MaxBytes[Econnection]: 1000000
   ShortLegend[Econnection]:
   YLegend[Econnection]: Connections
   Legend1[Econnection]: Established connections
   Legend2[Econnection]:
   LegendI[Econnection]: In
   LegendO[Econnection]:
   Title[Econnection]: Currently Established TCP Connections
   PageTop[Econnection]:<h1>Established TCP Connections</h1>
   
   

6. Cron

   vim /etc/cron.d/mrtg

   Edit it like below:

   0-59/5 * * * * root env LANG=C /usr/bin/mrtg /etc/mrtg/mymrtg.cfg

7. Remote Server

   Install and configure SNMP as step1 and step2 on the remote servers .Add content in the snmpd.conf like below:

   ......
   com2sec server          [---IP address of server here---]    public
   ......
   group   RWGroup         v1              server
   group   RWGroup         v2c             server
   group   RWGroup         usm             server
   ......

8. On main server side, make a new directory for remote server configure files, for example:

   mkdir /etc/mrtg/servers
   vi /etc/mrtg/servers/servername1.cfg

   add a new line in mrtg configure file:

   Include:servers/*.cfg

   configure mrtg for server1 like below:

   ### Monitoring CPU Load[use+free]
   
   Target[dev_cpuload]: .1.3.6.1.4.1.2021.11.50.0&.1.3.6.1.4.1.2021.11.53.0:public@(ip address of remote server):
   Directory[dev_cpuload]: dev_cpu 
   Options[dev_cpuload]: nopercent,growright
   MaxBytes[dev_cpuload]: 100
   Unscaled[dev_cpuload]: dwym
   YLegend[dev_cpuload]: CPU Utilization
   ShortLegend[dev_cpuload]: %
   Legend1[dev_cpuload]: CPU Usage(%)
   Legend2[dev_cpuload]: CPU Free(%)
   LegendI[dev_cpuload]: Used:
   LegendO[dev_cpuload]: Free:
   Title[dev_cpuload]: Developer Server CPU Load(Use+Free)
   PageTop[dev_cpuload]: <h1>Developer Server CPU Load(Use+Free)</h1>
   

9. After all, start mrtg service

   env Lang=C mrtg /etc/mrtg/mymrtg.cfg
   indexmaker --output=/var/www/html/mymrtg/index.html /etc/mrtg/mymrtg.cfg

10. Apache configure

    vim /etc/httpd/conf.d/mrtg.conf

    Add below content and restart the httpd service.

    Alias  /mymrtg  /var/www/html/mymrtg
    
    <Location /mymrtg>
        Order allow,deny
        Allow from all
        Deny from 192.168.1.1
    </Location>
    
    

11. Visit /mymrtg on browser, and check the result