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Nagios Core Error
Posted: Tue Jun 23, 2015 7:01 am
by venkatklr
Hi Friends,
I have installed Nagios core on CentOS 7 and web page is opening with error "Nagios core not running"and also when I click on Hosts, getting "Error: Could not read object configuration data!" Can some one help me how to fix it.
Thanks,
Venkat
Re: Nagios Core Error
Posted: Tue Jun 23, 2015 9:21 am
by jdalrymple
When you installed, did you disable selinux as a first step?
Post the output of the following 2 commands:
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[jdalrymple@localhost ~]$ ls -l /usr/local/nagios/var
[jdalrymple@localhost ~]$ ls -l /usr/local/nagios/var/rw
Re: Nagios Core Error
Posted: Tue Jun 23, 2015 9:27 am
by venkatklr
I have installed it today.
Please refer the attachment.
Please reach me @ *** DO NOT POST PERSONAL EMAIL ADDRESSES *** for more information.
Thank you for support.
Re: Nagios Core Error
Posted: Tue Jun 23, 2015 9:42 am
by jolson
It looks like you're missing the 'rw' directory. Unless I'm missing something, this is likely an indication of an improper installation. You will need to disable SELinux and reinstall for a quick resolution.
Please ensure that SELinux is disabled on the target system:
Install all pre-requisite packages:
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yum install -y wget httpd php gcc glibc glibc-common gd gd-devel make net-snmp unzip automake
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cd /tmp
wget https://github.com/NagiosEnterprises/nagioscore/archive/master.tar.gz -O nagioscore.tar.gz
wget https://github.com/nagios-plugins/nagios-plugins/archive/master.tar.gz -O nagiosplugins.tar.gz
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useradd nagios
groupadd nagcmd
usermod -a -G nagcmd nagios
usermod -a -G nagcmd apache
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tar xzf nagioscore.tar.gz
tar xzf nagiosplugins.tar.gz
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./configure --with-command-group=nagcmd
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make all
make install
make install-init
make install-config
make install-commandmode
make install-webconf
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cp -R contrib/eventhandlers /usr/local/nagios/libexec
chown -R nagios:nagios /usr/local/nagios/libexec/eventhandlers
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/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
/etc/init.d/nagios start
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htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
systemctl start httpd
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cd /tmp/nagios-plugins-master/
./tools/setup
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install
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chkconfig --add nagios
chkconfig --level 35 nagios on
systemctl enable httpd
Re: Nagios Core Error
Posted: Tue Jun 23, 2015 9:46 am
by venkatklr
I don't have much knowledge on Linux, please tell me how to disable it and please send me installation steps in doc format Please.
Re: Nagios Core Error
Posted: Tue Jun 23, 2015 9:58 am
by jolson
To disable SELinux, type the following command as root on the CLI:
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sed -i s/SELINUX=enforcing/SELINUX=disabled/ /etc/sysconfig/selinux && sed -i s/SELINUX=permissive/SELINUX=disabled/ /etc/sysconfig/selinux
After the above command has been typed, reboot your server. Once the server has been rebooted, simply follow the above instructions line-by-line and that's all you will need to do to have a fully functional core install.
Re: Nagios Core Error
Posted: Tue Jun 23, 2015 10:52 am
by venkatklr
Thanks for the info. I will follow these steps and let you know if I face any issue.
Thanks,
Venkat
Re: Nagios Core Error
Posted: Tue Jun 23, 2015 10:56 am
by jolson
Let us know what you find out. Thanks Venkat.
Re: Nagios Core Error
Posted: Wed Jun 24, 2015 1:19 am
by venkatklr
It is working now. I really appreciate for your time and support to resolve this issue. Now I want to know how to add host in Nagios to monitor, kindly share if any documents available or steps to get this done.
Thanks,
Venkat
Re: Nagios Core Error
Posted: Wed Jun 24, 2015 1:41 am
by Box293