I've just installed Cacti 0.8.8a from EPEL repo of CentOS 6.4. Everything is fine except the graphs do not show up. I checked the log of httpd then I see:
ERROR: opening '/usr/share/cacti/rra/localhost_mem_buffers_3.rrd': No such file or directory
ERROR: opening '/usr/share/cacti/rra/localhost_proc_7.rrd': No such file or directory
ERROR: opening '/usr/share/cacti/rra/localhost_users_6.rrd': No such file or directory
ERROR: opening '/usr/share/cacti/rra/localhost_load_1min_5.rrd': No such file or directory
Seems like rrdtool did not generate those files.
This is in /usr/share/cacti
ls -ls /usr/share/cacti
total 872
8 -rw-r--r-- 1 root root 5945 Jun 28 2012 about.php
8 -rw-r--r-- 1 root root 5348 Jun 28 2012 auth_changepassword.php
16 -rw-r--r-- 1 root root 14288 Jun 28 2012 auth_login.php
24 -rw-r--r-- 1 root root 21658 Jun 28 2012 cdef.php
0 lrwxrwxrwx 1 root root 18 Jul 25 13:42 cli -> /var/lib/cacti/cli
28 -rwxr-xr-x 1 root root 26620 Jun 28 2012 cmd.php
8 -rw-r--r-- 1 root root 6974 Jun 28 2012 color.php
28 -rw-r--r-- 1 root root 25068 Jun 28 2012 data_input.php
36 -rw-r--r-- 1 root root 35505 Jun 28 2012 data_queries.php
60 -rw-r--r-- 1 root root 60117 Jun 28 2012 data_sources.php
36 -rw-r--r-- 1 root root 32920 Jun 28 2012 data_templates.php
8 -rw-r--r-- 1 root root 6107 Jun 28 2012 gprint_presets.php
4 -rw-r--r-- 1 root root 3657 Jun 28 2012 graph_image.php
16 -rw-r--r-- 1 root root 13469 Jun 28 2012 graph.php
12 -rw-r--r-- 1 root root 9208 Jun 28 2012 graph_settings.php
20 -rw-r--r-- 1 root root 17426 Jun 28 2012 graphs_items.php
40 -rw-r--r-- 1 root root 40166 Jun 28 2012 graphs_new.php
60 -rw-r--r-- 1 root root 60571 Jun 28 2012 graphs.php
12 -rw-r--r-- 1 root root 10006 Jun 28 2012 graph_templates_inputs.php
20 -rw-r--r-- 1 root root 18542 Jun 28 2012 graph_templates_items.php
28 -rw-r--r-- 1 root root 26703 Jun 28 2012 graph_templates.php
40 -rw-r--r-- 1 root root 40313 Jun 28 2012 graph_view.php
8 -rw-r--r-- 1 root root 6022 Jun 28 2012 graph_xport.php
60 -rw-r--r-- 1 root root 60031 Jun 28 2012 host.php
20 -rw-r--r-- 1 root root 20031 Jun 28 2012 host_templates.php
4 drwxr-xr-x 2 root root 4096 Jul 25 13:42 images
4 drwxr-xr-x 4 cacti root 4096 Jul 25 13:50 include
4 -rw-r--r-- 1 root root 2313 Jun 28 2012 index.php
4 drwxr-xr-x 2 root root 4096 Jul 25 13:42 install
4 drwxr-xr-x 3 root root 4096 Jul 25 13:42 lib
0 lrwxrwxrwx 1 root root 15 Jul 25 13:42 log -> /var/log/cacti/
4 -rw-r--r-- 1 root root 2838 Jun 28 2012 logout.php
4 drwxr-xr-x 2 root root 4096 Jul 25 13:42 plugins
28 -rw-r--r-- 1 root root 27362 Jun 28 2012 plugins.php
8 -rw-r--r-- 1 root root 4310 Jun 28 2012 poller_commands.php
4 -rw-r--r-- 1 root root 2243 Jun 28 2012 poller_export.php
20 -rwxr-xr-x 1 root root 18056 Jun 28 2012 poller.php
4 drwxr-xr-x 5 root root 4096 Jul 25 13:42 resource
**0 lrwxrwxrwx 1 cacti cacti 18 Jul 25 13:42 rra -> /var/lib/cacti/rra**
8 -rw-r--r-- 1 root root 7394 Jun 28 2012 rra.php
0 lrwxrwxrwx 1 root root 22 Jul 25 13:42 scripts -> /var/lib/cacti/scripts
12 -rw-r--r-- 1 root root 10820 Jun 28 2012 script_server.php
8 -rw-r--r-- 1 root root 5761 Jun 28 2012 settings.php
4 -rw-r--r-- 1 root root 1407 Jun 3 2012 snmpv3_priv_proto_none.patch
8 -rw-r--r-- 1 root root 6345 Jun 28 2012 templates_export.php
8 -rw-r--r-- 1 root root 5835 Jun 28 2012 templates_import.php
20 -rw-r--r-- 1 root root 19529 Jun 28 2012 tree.php
44 -rw-r--r-- 1 root root 44997 Jun 28 2012 user_admin.php
68 -rw-r--r-- 1 root root 65635 Jun 28 2012 utilities.php
I also changed the owner of rra folder to cacti user like this:
ls -ls /var/lib/cacti/
total 12
4 drwxr-xr-x 2 root root 4096 Jul 25 13:42 cli
0 lrwxrwxrwx 1 root root 24 Jul 25 13:42 include -> /usr/share/cacti/include
0 lrwxrwxrwx 1 cacti root 20 Jul 25 13:42 lib -> /usr/share/cacti/lib
**4 drwxr-xr-x 2 cacti cacti 4096 Jun 28 2012 rra**
4 drwxr-xr-x 2 root root 4096 Jul 25 13:42 scripts
What should I do next? Thanks a lot!
What worked for me was to go into System Utilities (bottom of console) and click on Rebuild Poller Cache.