Observium install and operation tips

Observium install and operation tips

 

Observium version : 0.13.xx
OS : CentOS 6.5, 4G RAM, 2 CPU
 

1. Installation

– Below link vendor provided for installation are really good.

http://www.observium.org/wiki/RHEL_Installation

– There are few steps required more info for beginner level.

1-1. Database section.

– When you got an issue with mysql access (error message " ERROR 1045 (28000): Access denied for user ‘root’@’localhost’ (using password: YES)")

See my other blog "MySQL error 1045 – Access denied for user root@localhost"

 

1-2.  "php includes/update/update.php" section.

– Edit config.php with your username and password

 

1-3. Update iptable (Firewall option on CentOS)

 

CentoOS 6.5 default setting of iptable is

 

> Firewall configuration written by system-config-firewall
> Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state –state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state –state NEW -m tcp -p tcp –dport 22 -j ACCEPT
-A INPUT -j REJECT –reject-with icmp-host-prohibited
-A FORWARD -j REJECT –reject-with icmp-host-prohibited
COMMIT

 

add below with below statements.

– A INPUT -p tcp -m tcp –dport 80 -j ACCEPT
– A INPUT -p tcp -m tcp –dport 443 -j ACCEPT

You could block icmp with below statement.
– A INPUT -j REJECT –reject-with icmp-host-prohibited
 

Dont’ forget restart service

[root@CentOS /]# service iptables restart

 

1-4. Hosts file

To add new device, Observium requires servername instead of IP. If you don’t have DNS server control, use hosts file in Observium server. 

 

[root@CentOS /]# nano /etc/hosts

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.100.1    sg300
192.168.100.5    QNAP
192.168.100.33   Observium-CentOS
192.168.100.254  zywall
:
:

 

 

1-5. HTTPD.conf

 

If Observium server is the only web server on the box, try below wihin the /etc/httpd/conf/httpd.conf file.

[root@CentOS /]# nano /etc/httpd/conf/httpd.conf

 

#Listen 12.34.56.78:80
Listen 80
:

:

#ServerName 127.0.0.1:80   <–Blocked with #

:

#

  DocumentRoot /opt/observium/html/
  ServerName  Observium-CentOS
  CustomLog /opt/observium/logs/access_log combined
  ErrorLog /opt/observium/logs/error_log
 
  AllowOverride All
  Options FollowSymLinks MultiViews
 

 

1-6. If you want to change regular port# 80/HTTP to 8080

 [root@CentOS /]# nano /etc/httpd/conf/httpd.conf

 

 

1-6. Change port# to 8080

1-6-1. Modify httpd.conf file and restart

[root@CentOS /]# nano /etc/httpd/conf/httpd.conf

 

Listen 8080

:

8080>
  DocumentRoot /opt/observium/html/
  ServerName  Observium-CentOS
  CustomLog /opt/observium/logs/access_log combined
  ErrorLog /opt/observium/logs/error_log
 
  AllowOverride All
  Options FollowSymLinks MultiViews
 

 

[root@CentOS /]# httpd -k restart

 

 

1-6-2. Modify iptables file and restart

-A INPUT -p tcp -m tcp –dport 80 -j ACCEPT
-A INPUT -p tcp -m tcp –dport 8080 -j ACCEPT ; add this line
-A INPUT -p tcp -m tcp –dport 443 -j ACCEPT
 

* Always make a backup file before modifying.

 [root@CentOS /]# service iptables restart

 

1-6-2. To verify your server is listening port 8080

 [root@CentOS /]# netstat -ano | grep 8080

tcp        0      0 :::8080                     :::*                        LISTEN      off (0.00/0/0)

 

 

2. Operation

 

being updated……………..

 

3. Troubleshooting and errors

 

3-1 Httpd error

"[root@Observium-CentOS observium]# service httpd restart
Stopping httpd:                                            [FAILED]
Starting httpd: httpd: apr_sockaddr_info_get() failed for Observium-CentOS
httpd: Could not reliably determine the server’s fully qualified domain name, using 127.0.0.1 for ServerName
                                                           [FAILED]"

 

Solution> Check httpd.conf (Above 1-5) also, use command httpd -k start instead of service httpd restart.