nagios installl

todayboy

yum install httpd
yum install gcc
yum install glibc glibc-common
yum install gd gd-devel
1) Create Account Information
Become the root user.
su -l
Create a new nagios user account and give it a password.
/usr/sbin/useradd -m nagios
passwd nagios
Create a new nagcmd group for allowing external commands to be submitted through the web interface. Add both the nagios user and the apache user to the group.
/usr/sbin/groupadd nagcmd
/usr/sbin/usermod -a -G nagcmd nagios
/usr/sbin/usermod -a -G nagcmd apache
2) Download Nagios and the Plugins
Create a directory for storing the downloads.
mkdir ~/downloads
cd ~/downloads
Download the source code tarballs of both Nagios and the Nagios plugins (visit
http://www.nagios.org/download/
for links to the latest versions). At the time of writing, the latest versions of Nagios and the Nagios plugins were 3.0.3 and 1.4.11, respectively.
wget http://osdn.dl.sourceforge.net/sourceforge/nagios/nagios-3.0.6.tar.gz
wget http://osdn.dl.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.11.tar.gz
3) Compile and Install Nagios
Extract the Nagios source code tarball.
cd ~/downloads
tar xzf nagios-3.0.6.tar.gz
cd nagios-3.0.6
Run the Nagios configure script, passing the name of the group you created earlier like so:
./configure --with-command-group=nagcmd
Compile the Nagios source code.
make all
Install binaries, init script, sample config files and set permissions on the external command directory.
make install
make install-init
make install-config
make install-commandmode
Don't start Nagios yet - there's still more that needs to be done...
4) Customize Configuration
Sample
configuration files
have now been installed in the /usr/local/nagios/etc directory. These sample files should work fine for getting started with Nagios. You'll need to make just one change before you proceed...
Edit the /usr/local/nagios/etc/objects/contacts.cfg config file with your favorite editor and change the email address associated with the nagiosadmin contact definition to the address you'd like to use for receiving alerts.
vi /usr/local/nagios/etc/objects/contacts.cfg
5) Configure the Web Interface
Install the Nagios web config file in the Apache conf.d directory.
make install-webconf
Create a nagiosadmin account for logging into the Nagios web interface. Remember the password you assign to this account - you'll need it later.
htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin
Restart Apache to make the new settings take effect.
service httpd restart

Note: Consider implementing the ehanced CGI security measures described
here
to ensure that your web authentication credentials are not compromised.
6) Compile and Install the Nagios Plugins
Extract the Nagios plugins source code tarball.
cd ~/downloads
tar xzf nagios-plugins-1.4.11.tar.gz
cd nagios-plugins-1.4.11
Compile and install the plugins.
./configure --with-nagios-user=nagios --with-nagios-group=nagios
make
make install
7) Start Nagios
Add Nagios to the list of system services and have it automatically start when the system boots.
chkconfig --add nagios
chkconfig nagios on
Verify the sample Nagios configuration files.
/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
If there are no errors, start Nagios.
service nagios start  
c) Remote Host Setup

i. Create Account Information
Create a new nagios user account and give it a password.
/usr/sbin/useradd nagios
passwd nagios
ii. Install the Nagios Plugins
wget
http://osdn.dl.sourceforge.net/sourceforge/nagiosplug/nagios-plugins-1.4.6.tar.gz
（最好下更新的，这个版本有一个bug）
tar xzf nagios-plugins-1.4.6.tar.gz
cd nagios-plugins-1.4.6
Compile and install the plugins.
./configure
make
make install
The permissions on the plugin directory and the plugins will need to be fixed at this point, so run the following
commands.
chown nagios.nagios /usr/local/nagios
chown -R nagios.nagios /usr/local/nagios/libexec
iii. Install xinetd
Fedora Core 6 doesn't ship with xinetd installed by default, so install it with the following command:
yum install xinetd

iv. Install the NRPE daemon
wget http://osdn.dl.sourceforge.net/sourceforge/nagios/nrpe-2.8.tar.gz
Extract the NRPE source code tarball.
tar xzf nrpe-2.8.tar.gz
cd nrpe-2.8
Compile the NRPE addon.
./configure
make all
(error: undefined reference to `dlerror'、、、
Install the NRPE plugin (for testing), daemon, and sample daemon config file.
make install-plugin
make install-daemon
make install-daemon-config
Install the NRPE daemon as a service under xinetd.
make install-xinetd
Edit the /etc/xinetd.d/nrpe file and add the IP address of the monitoring server to the only_from directive.
only_from = 127.0.0.1
Add the following entry for the NRPE daemon to the /etc/services file.
nrpe 5666/tcp # NRPE
Restart the xinetd service.
service xinetd restart

v. Test the NRPE daemon locally
Its time to see if things are working properly...
Make sure the nrpe daemon is running under xinetd.
netstat -at | grep nrpe
The output out this command should show something like this:
tcp 0 0 *:nrpe *:* LISTEN

the check_nrpe plugin that
was installed for testing purposes.
/usr/local/nagios/libexec/check_nrpe -H localhost

vi. Open firewall rules
iptables -I RH-Firewall-1-INPUT -p tcp -m tcp –dport 5666 -j ACCEPT

d) Monitoring Host Setup
On the monitoring host (the machine that runs Nagios), you'll need to do just a few things:
– Install the check_nrpe plugin
– Create a Nagios command definition for using the check_nrpe plugin
Create Nagios host and service definitions for monitoring the remote host

i. Install the check_nrpe plugin
wget
http://osdn.dl.sourceforge.net/sourceforge/nagios/nrpe-2.8.tar.gz
./configure
make all
Install the NRPE plugin.
make install-plugin
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ii. Test communication with the NRPE daemon



问题：dso_dlfcn.c:(.text+0x592): undefined reference to `dlopen'
dso_dlfcn.c:(.text+0x5fb): undefined reference to `dlclose'
dso_dlfcn.c:(.text+0x623): undefined reference to `dlerror'
source:http://gzmaster.blog.51cto.com/299556/60572
看过之后如此解决:
在安装插件的时候如果make报这个错误,则使用
make LDFLAGS+=-ldl
在安装nrpe的时候如果make报这个错误,则使用
export CFLAGS=-ldl
./configure
make all

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