Zabbix admin page turned to blank after the server reboot

[fujikura]

we installed Zabbix 2.4.1 in CentOS 6.5(VM), it was working for a while but once we restarted the server, we can not open the http://serverIP/zabbix page again.
Anyone have good ideas about this? thank you.

[ingus.vilnis]

Hello and welcome to Zabbix forum!

The reason for this may be because you have not yet configured zabbix server and it's related processes to start upon system boot.

Use CentOS command "chkconfig" to check it.

I usually use the following configs for my CentOS installs.

chkconfig --levels 3456 httpd on
chkconfig --levels 3456 iptables on
chkconfig --levels 3456 mysqld on
chkconfig --levels 3456 zabbix-server on
chkconfig --levels 3456 zabbix-agent on

Best Regards,
Ingus

[fujikura]

Hello and welcome to Zabbix forum!

The reason for this may be because you have not yet configured zabbix server and it's related processes to start upon system boot.

Use CentOS command "chkconfig" to check it.

I usually use the following configs for my CentOS installs.

chkconfig --levels 3456 httpd on
chkconfig --levels 3456 iptables on
chkconfig --levels 3456 mysqld on
chkconfig --levels 3456 zabbix-server on
chkconfig --levels 3456 zabbix-agent on

Best Regards,
Ingus

Hi, many thanks for the reply!
I have checked all above services and they are on.
I always use following command:
service httpd status
service mysql status
service zabbix_server status
service zabbix_agentd status

The first time when we configued zabbix it was working but once we reboot the server, then the page of "http://serverIP/zabbix" can not be open.

Regards

[ingus.vilnis]

Hi,

Maybe SELinux is in your way?

# setsebool -P httpd_can_network_connect=true
# getsebool -a | grep zabbix
# setsebool -P zabbix_can_network=true

Best Regards,
Ingus

[fujikura]

Hi,

Maybe SELinux is in your way?

# setsebool -P httpd_can_network_connect=true
# getsebool -a | grep zabbix
# setsebool -P zabbix_can_network=true

Best Regards,
Ingus

Hi, thank you for your reply.
I have tried what you mentioned but seems still not working.. mabye we should try another ver of Zabbix but not the latest(2.4)?
BTW, i attached the steps when we doing the setup for your reference.

[ingus.vilnis]

Hi,

This is not a problem related to Zabbix version itself. 2.4.1 is the latest stable and you should keep it. I quickly reviewed the attached installation steps and did not see any big problems there.

The problem may be in the environment used.

Can you confirm that the mysql database and Apache web services are running properly on your server?

/etc/init.d/mysqld start
/etc/init.d/httpd start

Best Regards,
Ingus

[fujikura]

Hi,

This is not a problem related to Zabbix version itself. 2.4.1 is the latest stable and you should keep it. I quickly reviewed the attached installation steps and did not see any big problems there.

The problem may be in the environment used.

Can you confirm that the mysql database and Apache web services are running properly on your server?

/etc/init.d/mysqld start
/etc/init.d/httpd start

Best Regards,
Ingus

Thank you, here is the result after running the command:
-------------------------------------------------------------------------------
[root@localhost etc]# init.d/mysqld start
mysqld を起動中(running): [ OK ]
[root@localhost etc]# init.d/httpd start
httpd を起動中(running):


[root@localhost etc]# service httpd status
httpd (pid 1861) を実行中(running)...
[root@localhost etc]# service mysqld status
mysqld (pid 1733) を実行中(running)...
[root@localhost etc]#
-------------------------------------------------------------------------------

something wrong with the apache service? it says "running" but i can't see the [ OK ] behind.

[ingus.vilnis]

[root@localhost etc]# service httpd status
httpd (pid 1861) を実行中(running)...

You see, it is running.
Try restarting it. You should see OK then.

But the main issue is the connectivity to your webserver. Try troubleshooting that direction.

Are httpd settings correct? Is it pointing to the correct path of www folder?

Best Regards,
Ingus

[fujikura]

[root@localhost etc]# service httpd status
httpd (pid 1861) を実行中(running)...

You see, it is running.
Try restarting it. You should see OK then.

But the main issue is the connectivity to your webserver. Try troubleshooting that direction.

Are httpd settings correct? Is it pointing to the correct path of www folder?

Best Regards,
Ingus

Hi, i think we have found the root cause:
vi /etc/selinux/config
modify the status of SELINUX=enforcing to SELINUX=disabled (need reboot)

Hope this can help others who have the same problem as us.

[ingus.vilnis]

Hi,

Glad you got that working.

Just keep in mind that even though SELinux was the root cause, disabling it completely is not considered safe. For now you got Zabbix running but for the future please try to get it working with SELinux enabled.

Good luck!

Ingus