1. 请参考如下网址进行基本安装与配置
http://tecadmin.net/install-cacti-on-centos-rhel-systems/
You can do yum install cacti –nogpgcheck to install the packages
Then yum install snmpd
2. Add a readonly community to snmpd.conf.
Then you can use snmpget/snmpwalk to get interface statistics
Add a line below com2sec line
rocommunity 123
3. Use snmpget/snmpwalk to try to get some info
snmpwalk -v2c -c123 localhost
4. visit http://YOURIP/cacti to see the result
If not accesable, please google the log error
The log is under /var/log/httpd/
5. After the configuration described on the website and you can visit cacti web console, you need to do several other things
1) set the timezone to Asia/Shanghai at several places. This is because cacti default use UTC which is not the same with your system’s timezone setting
2) Edit php’s timezone
/etc/php.ini:
timezone=Asia/Shanghai
3) set system’s timezone
systemctl list-timezones,
systemctl set-timezone Asia/Shanghai
4) set cacti’s timezone
In cmd.php, global.php, global_arrays.php etc, add following line
date_default_timezone_set('Asia/shanghai');
###############
6. Add a device and draw some statistics on “graph” tab
1) Management | devices | Add | fill it and save it | Add associated data query ->snmp iterface statitiscts | Ad
2) Create graph for this host | select the host, select which interface you want to draw | Create
3）management | data sources | select the data source you just created | Edit data template | Change the maximum value of traffic_in/traffic_out to 1000000000
4) management | graph tree | select default tree | Add | select host, select the newly created host | create
5) You should see the graph under graph tab now.
7. Debug cact web console
1） 查看rrd文件是否取到数据
rrdtool info /usr/share/cacti/rra/<your rra file> --->查看这个rra文件的创建参数, rrdtool create的参数
rrdtool fetch /usr/share/cacti/rra/<your rra file> AVERAGE/MAX --->这个命令就是查看是否能够画出图来的，如果能够读到数，就应该能画出图
rrdtool dump /usr/share/cacti/rra/<your rra file> ---->这个命令可以查看RRA里面的原始值，但是画图并不用这个原始值，要用CF函数聚合一下再画
2） 在web页面设置cacti的loglevel， 使能data source debugging， graph debugging
loglevel在configuration | settings | general | Poller specific logging | Poller Logging Level
data source debuging在 management | data sources | 随便点击一个data source进入datasource页面 | Turn on data source debug mode
graph debugging 在management | graph management | 随便点击一个graph进入graph页面 | Turn on graph debug mode
3) 设置Poller的log
在centos 7上更改/etc/cron.d/cacti如下：
将>dev/null 改成 > your_log_file即可
然后service crond restart
4) 查看各种Log
/var/log/cacti/cacti.log
/var/log/httpd/*.log
your_log_file set in /etc/cron.d/cacti