Pre-Flight
----------
I'm using CentOS-Testing to install PHP 5.2.10.
yum install \
mysql-server \
mysql \
php-mysql \
php-pear \
php-common \
php-gd \
php-devel \
php \
php-mbstring \
php-cli \
php-snmp \
php-pear-Net-SMTP \
php-mysql \
httpd \
net-snmp-utils \
php-snmp \
net-snmp-libs \
rrdtool \
--enablerepo=c5-testing
Here's what I have in `/etc/snmp/snmp/conf`:
rocommunity HOME
syslocation "The University of Iowa"
syscontact mail@nikhil.io
I also made sure that the SNMP daemon was running by running:
snmpwalk -v 1 -c CLCG localhost IP-MIB::ipAdEntIfIndex
Set up the MySQL database:
```sql
grant all on cacti.* to 'cactiuser'@'localhost' identified by 'Lua77hQhdnB';
```
Install Cacti
-------------
Make sure that [the EPEL
repository](http://download.fedora.redhat.com/pub/epel/5/i386/epel-release-5-4.noarch.rpm)
is installed.
yum -y install cacti --enablerepo=epel
Look for an SQL install file and install it:
rpm -ql cacti | grep cacti.sql
/usr/share/doc/cacti-0.8.7f/cacti.sql
mysql -ucactiuser -p cacti < /usr/share/doc/cacti-0.8.7f/cacti.sql
Now edit the config file (`/etc/cacti/db.php`) to add database
information.
* The Cacti RPM also installs a configuration directive,
`/etc/httpd/conf.d/cacti.conf`. Change it to `Allow from all`
* You'll also find stuff in `/etc/cron.d/cacti`. Add that to your crontab.
* The installer should create a `cacti` user and `cacti` group.
Change some permissions:
chmod -R 755 /usr/share/cacti
chown -R cacti:cacti /usr/share/cacti
Make sure that the `rra/` and `log/` are owned by `cacti`.
Now restart the `httpd` service and navigate to `http://site/*cacti*` (or
whatever you edited to be the `Alias` directive.) The username/password config
for the first time login is `admin/admin`.
Problems
--------
* **The most important thing**: The poller must run as the `cacti` user!
### You get a "Forbidden" when loading the page for the first time
* Make sure that you have `Allow from all` in `/etc/httpd/conf.d/cacti.conf`
* Make sure that the user:group permissions are good for `/usr/share/cacti`
### No freakin' graphs
Tailing the `httpd` error log produces something like:
ERROR: opening '/usr/share/cacti/rra/localhost_mem_buffers_3.rrd': No such file or directory
There's also nothing in `/var/log/cacti/cacti.log`. In this case, do
this:
chown cacti:apache /var/lib/cacti/rra
chmod 775 cacti:apache /var/lib/cacti/rra
This is [a bug](https://bugzilla.redhat.com/show_bug.cgi?id=250348) that
others have encountered. I changed the permissions like above, ran the
poller and the graphs were displayed. I'm fine with this.