CentOS6.8安装nagios

Security-Enhanced Linux
　　This guide is based on SELinux being disabled or in permissive mode. Steps to do this are as follows.  
sed -i 's/SELINUX=.*/SELINUX=disabled/g' /etc/selinux/config setenforce 0
Prerequisites
　　Perform these steps to install the pre-requisite packages
yum install -y gcc glibc glibc-common wget unzip httpd php gd gd-devel perl postfix.
Downloading the Source
　　cd /tmp
wget -O nagioscore.tar.gz
https://github.com/NagiosEnterprises/nagioscore/archive/nagios-4.4.1.tar.gz
tar xzf nagioscore.tar.gz
Compile
　　cd /tmp/nagioscore-nagios-4.4.1/
./configure
make all
Create User And Group
　　This creates the nagios user and group. The apache user is also added to the nagios group.
make install-groups-users
usermod -a -G nagios apache
Install Binaries
　　This step installs the binary files, CGIs, and HTML files.
make install
Install Service / Daemon
　　This installs the service or daemon files and also configures them to start on boot. The Apache httpd service is also configured at this point.
make install-daemoninit
chkconfig --level 2345 httpd on
Install Command Mode
　　This installs and configures the external command file.
make install-commandmode
Install Configuration Files
　　This installs the SAMPLE configuration files. These are required as Nagios needs some configuration files to allow it to start.
make install-config
Install Apache Config Files
　　This installs the Apache web server configuration files. Also configure Apache settings if required.
make install-webconf
Configure Firewall
　　You need to allow port 80 inbound traffic on the local firewall so you can reach the Nagios Core web interface.
iptables -I INPUT -p tcp --destination-port 80 -j ACCEPT service iptables save
ip6tables -I INPUT -p tcp --destination-port 80 -j ACCEPT service ip6tables save
Create nagiosadmin User Account
　　You'll need to create an Apache user account to be able to log into Nagios.
The following command will create a user account called nagiosadmin and you will be prompted to provide a password for the account.
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
Start Apache Web Server
　　service httpd start
Start Service / Daemon
　　service nagios start
Test Nagios
　　Nagios is now running, to confirm this you need to log into the Nagios Web Interface.
Point your web browser to the ip address or FQDN of your Nagios Core server, for example:
http://10.25.5.143/nagios  
http://core-013.domain.local/nagios
You will be prompted for a username and password. The username is nagiosadmin (you created it in a previous step) and the password is what you provided earlier.  Once you have logged in you are presented with the Nagios interface. Congratulations you have installed Nagios Core.
BUT WAIT ...
　　Currently you have only installed the Nagios Core engine. You'll notice some errors under the hosts and services along the lines of:  
(No output on stdout) stderr: execvp(/usr/local/nagios/libexec/check_load, ...) failed. errno is 2: No such file or directory
These errors will be resolved once you install the Nagios Plugins, which is covered in the next step.
Installing The Nagios Plugins
　　Nagios Core needs plugins to operate properly. The following steps will walk you through installing Nagios Plugins.
These steps install nagios-plugins 2.2.1. Newer versions will become available in the future and you can use those in the following installation steps. Please see the releases page on GitHub for all available versions.
Please note that the following steps install most of the plugins that come in the Nagios Plugins package. However there are some plugins that require other libraries which are not included in those instructions. Please refer to the following KB article for detailed installation instructions:
Documentation - Installing Nagios Plugins From Source.
Prerequisites
　　Make sure that you have the following packages installed.
yum install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils epel-release
yum install -y perl-Net-SNMP
　　cd /tmp
wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-6.noarch.rpm
rpm -ihv epel-release-latest-6.noarch.rpm
yum install -y gcc glibc glibc-common make gettext automake autoconf wget openssl-devel net-snmp net-snmp-utils
yum install -y perl-Net-SNMP
Downloading The Source
　　cd /tmp
wget --no-check-certificate -O
nagios-plugins.tar.gz https://github.com/nagios-plugins/nagios-plugins/archive/release-2.2.1.tar.gz
tar zxf nagios-plugins.tar.gz
Compile + Install
　　cd /tmp/nagios-plugins-release-2.2.1/
./tools/setup ./configure
make make install
Test Plugins
　　Point your web browser to the ip address or FQDN of your Nagios Core server, for example:
http://10.25.5.143/nagios  
http://core-013.domain.local/nagios
Go to a host or service object and "Re-schedule the next check" under the Commands menu. The error you previously saw should now disappear and the correct output will be shown on the screen.
Service / Daemon Commands
　　service nagios start
service nagios stop
service nagios restart
service nagios status
　　详细信息请参考
https://support.nagios.com/kb/article/nagios-plugins-installing-nagios-plugins-from-source-569.html#CentOS