I have used munin in several servers and this is the first time is taking me so much time to set it up.

When I telnet munin directly, I can list the services, there is no error at the logs and munin its being updated every 5 minutes. However no html files are created. I'm using the default location (/var/cache/munin/www) and I can confirm the permissions of that directory are set to munin.munin

(IP and domain has been changed)

munin.conf:

dbdir   /var/lib/munin
htmldir /var/cache/munin/www
logdir  /var/log/munin
rundir  /var/run/munin
[example.com;]
    address 100.100.50.200

munin-node.conf:

log_level 4
log_file /var/log/munin/munin-node.log
pid_file /var/run/munin/munin-node.pid
background 1
setsid 1
user root
group root
host_name example.com
allow ^127\.0\.0\.1$
allow ^100\.100\.50\.200$
allow ^::1$

/etc/hosts :

100.100.50.200 example.com
127.0.0.1   localhost

$ telnet example.com 4949

Trying 100.100.50.200...
Connected to example.com.
Escape character is '^]'.
# munin node at example.com

list

apache_accesses apache_processes apache_volume cpu cpuspeed df df_inode entropy fail2ban forks fw_packets if_err_eth0 if_err_eth1 if_eth0 if_eth1 interrupts ipmi_fans ipmi_power ipmi_temp irqstats load memory munin_stats mysql_bin_relay_log mysql_commands mysql_connections mysql_files_tables mysql_innodb_bpool mysql_innodb_bpool_act mysql_innodb_insert_buf mysql_innodb_io mysql_innodb_io_pend mysql_innodb_log mysql_innodb_rows mysql_innodb_semaphores mysql_innodb_tnx mysql_myisam_indexes mysql_network_traffic mysql_qcache mysql_qcache_mem mysql_replication mysql_select_types mysql_slow mysql_sorts mysql_table_locks mysql_tmp_tables ntp_2001:e40:100:208::123 ntp_91.189.94.4 ntp_kernel_err ntp_kernel_pll_freq ntp_kernel_pll_off ntp_offset ntp_states open_files open_inodes postfix_mailqueue postfix_mailvolume proc_pri processes swap threads uptime users vmstat

fetch df

_dev_sda3.value 2.1762874086869
_sys_fs_cgroup.value 0
_run.value 0.0503536980635825
_run_lock.value 0
_run_shm.value 0
_run_user.value 0
_dev_sda5.value 0.0176986285727571
_dev_sda8.value 1.08464646179852
_dev_sda7.value 0.0346633563514803
_dev_sda9.value 6.81031810822797
_dev_sda6.value 9.0932802215469
.

/var/log/munin/munin-node.log

Process Backgrounded
2014/08/16-14:13:36 Munin::Node::Server (type Net::Server::Fork) starting! pid(19610)
Binding to TCP port 4949 on host 100.100.50.200 with IPv4
2014/08/16-14:23:11 CONNECT TCP Peer: "[100.100.50.200]:55949" Local: "[100.100.50.200]:4949"
2014/08/16-14:36:16 CONNECT TCP Peer: "[100.100.50.200]:56209" Local: "[100.100.50.200]:4949"

/var/log/munin/munin-update.log

...
2014/08/16 14:30:01 [INFO]: Starting munin-update
2014/08/16 14:30:01 [INFO]: Munin-update finished (0.00 sec)
2014/08/16 14:35:02 [INFO]: Starting munin-update
2014/08/16 14:35:02 [INFO]: Munin-update finished (0.00 sec)
2014/08/16 14:40:01 [INFO]: Starting munin-update
2014/08/16 14:40:01 [INFO]: Munin-update finished (0.00 sec)

$ ls -la /var/cache/munin/www/

drwxr-xr-x 3 munin munin   19 Aug 16 13:55 .
drwxr-xr-x 3 root  root    16 Aug 16 13:54 ..
drwxr-xr-x 2 munin munin 4096 Aug 16 13:55 static

Any ideas on why it is not working?

EDIT

This is how /var/log/munin/ log looks like after some days:

-rw-r----- 1 www-data    0 Aug 16 13:54 munin-cgi-graph.log
-rw-r----- 1 www-data    0 Aug 16 13:54 munin-cgi-html.log
-rw-rw-r-- 1 munin       0 Aug 16 13:55 munin-html.log
-rw-r----- 1 munin       0 Aug 19 06:18 munin-limits.log
-rw-r----- 1 munin     15K Aug 18 14:10 munin-limits.log.1
-rw-r----- 1 munin    1.8K Aug 18 06:15 munin-limits.log.2.gz
-rw-rw-r-- 1 munin    1.3K Aug 17 06:15 munin-limits.log.3.gz
-rw-r--r-- 1 root     6.5K Aug 16 13:55 munin-node-configure.log
-rw-r--r-- 1 root        0 Aug 17 06:18 munin-node.log
-rw-r--r-- 1 root      420 Aug 16 14:52 munin-node.log.1.gz
-rw-r----- 1 munin       0 Aug 19 06:18 munin-update.log
-rw-r----- 1 munin     11K Aug 18 14:10 munin-update.log.1
-rw-r----- 1 munin    1.6K Aug 18 06:15 munin-update.log.2.gz
-rw-rw-r-- 1 munin    1.5K Aug 17 06:15 munin-update.log.3.gz