Nagios installation and deployment

Contents

1. Install nagios server... 2

1. Install nagios... 2

2. Install the nagios plug-in... 3

3. Install the nrpe plug-in... 3

2. Run nagios. 3

3. Add a monitoring host... 4

1. windows host... 4

2. linux host... 6

4. Use plug-ins... 10

5. Custom notification alert... 10

1. nagios Server Installation 1. nagios Installation

1. Create a user nagios

/Usr/sbin/useradd nagios

2. Download nagios4.0.4

Http://jaist.dl.sourceforge.net/project/nagios/nagios-4.x/nagios-4.0.4/nagios-4.0.4.tar.gz

3. Extract

Tar -zxfnagios-4.0.4.tar.gz

4. Enter the nagios-4.0.4 directory for sequential execution.

./Configure

Make all # compile the main program and CGIs

Make install # this INSTALLThe main program CGIs, and HTML files

Make install-init # this INSTALLThe initscript in/etc/rc. d/init. d

Make install-commandmode # this installand configures permissions onthe directory for holding the external command file

Make install-config # this installsample config files in/usr/local/nagios/etc/

You'll have to modify these sample files before you can usenagios,

The configuration file is installed in/usr/local/nagios/etc by default.

To configure Nagios for normal operation, you only need to make a simple modification...

Use the editor software you are good at to edit this

/Usr/local/nagios/etc/objects/contacts. cfg configuration file, change the email address

The e-mail information in the contact definition information of nagiosadmin is your EMail information to receive the alarm

.

Vi/usr/local/nagios/etc/objects/contacts. cfg

# Configure web interfaces

Make install-webconf # this INSTALLThe Apache configfile for the Nagios web interface

Create the following command to create a nagiosadmin user for logging on to Nagios web interface.

Htpasswd-c/usr/local/nagios/etc/htpasswd. usersnagiosadmin

Restart apache to make the service take effect.

Service httpd restart

Make install-exfoliation # this INSTALLThe exfoliation theme for the Nagios webinterface

Make install-classicui # this INSTALLThe classictheme for the Nagios web interface

2. Install the nagios plugin

Compile and install the plug-in

./Configure -- with-nagios-user = nagios -- with-nagios-group = nagios

Make

Makeinstall

3. Install the nrpe plug-in

The following is a detailed description of linux host monitoring.

After nrpe is installed, You need to configure

Add the NRPE command to the objects/command. cfg command definition file.
[Root @ KCentOS5C ~] # Vi/usr/local/nagios/etc/commands. cfg
-------------------------------------------------------
# NRPE Command
Add the nrpe function command.

Define command (
Command_name nrpe
Command_line $ USER1 $/check_nrpe-H $ HOSTADDRESS $-c $ ARG1 $
}

2. Run nagios

Add Nagios to the service list to enable it automatically when the system starts.

Chkconfig -- add nagios

Chkconfig nagios on

Verify the configuration file of Nagios. If no error is reported, you can start Nagios

/Usr/local/nagios/bin/nagios-v/usr/local/nagios/etc/nagios. cfg

1. Initialization Script: the simplest way to start the nagios daemon is to use the initialization script,

/Etc/rc. d/init. d/nagios start

2. manually, you can receive and start the Nagios daemon, and use the command parameter-d

/Usr/local/nagios/bin/nagios-d/usr/local/nagios/etc/nagios. cfg

3. Use service

Service nagios start

3. Add monitoring HOST 1. windows Host

Install NSClient ++

During installation, you only need to modify the address of the nagios server. Do not enter the password.

Other steps,

2. Open the windows. cfg file in editing mode.

Vi/usr/local/nagios/etc/objects/windows. cfg (this is configured on the nagios server host)

You can modify the object definition in the windows. cfg file. Modify host_name,

The alias and address domains match the added Windows machine.

Define host

Define host {

Use windows-server; Inherit default valuesfrom

Windows server template (make sure you keep this line !)

Host_name winserver

Alias My Windows Server

Address 192.168.1.2 # windows Host address.

}

Define Service

Define service {

Use generic-service

Host_name 192.168.120.152

Service_description NSClient ++ Version

Check_command check_nt! CLIENTVERSION

}

# Create a service for monitoring theuptime of the server

# Change the host_name to match the name ofthe host you defined abve

Define service {

Use generic-service

Host_name 192.168.120.152

Service_description Uptime

Check_command check_nt! UPTIME

}

# Create a service for monitoring CPU load

# Change the host_name to match the name ofthe host you defined abve

Define service {

Use generic-service

Host_name 192.168.120.152

Service_description CPU Load

Check_command check_nt! CPULOAD! -L 5, 80, 90

}

# Create a service for monitoring memoryusage

# Change the host_name to match the name ofthe host you defined abve

Define service {

Use generic-service

Host_name 192.168.120.152

Service_description MemoryUsage

Check_command check_nt! MEMUSE! -W 80-c 90

}

# Create a service for monitoring C: \ diskusage

# Change the host_name to match the name ofthe host you defined abve

Define service {

Use generic-service

Host_name 192.168.120.152

Service_description C: \ DriveSpace

Check_command check_nt! USEDDISKSPACE! -L c-w 80-c 90

}

# Create a service for monitoring the W3SVCservice

# Change the host_name to match the name ofthe host you defined abve

Define service {

Use generic-service

Host_name 192.168.120.152

Service_description W3SVC

Check_command check_nt! SERVICESTATE! -DSHOWALL-l W3SVC

}

# Create a service for monitoring thepolicer.exe process

# Change the host_name to match the name ofthe host you defined abve

Define service {

Use generic-service

Host_name 192.168.120.152

Service_description Explorer

Check_command check_nt! PROCSTATE! -D SHOWALL-l assumer.exe

}

After modification, add windows. cfg to nagios. cfg.

Export _file =/usr/local/nagios/etc/objects/windows. cfg

2. linux host

Install the nagios plug-in and nrpe on the monitored host

1. Add a Nagio user

[Root @ KCentOS5A ~] # Useradd nagios

2. decompress the Nagios-plugins package

[Root @ KCentOS5A ~] # Tar-zxvf nagios-plugins-1.4.10.tar.gz 4. Go to the Nagios-plugins plug-in package directory

[Root @ KCentOS5A ~] # Cd nagios-plugins-1.4.10

5. Pre-configure the Nagios-plugins installation path

[Root@KCentOS5Anagios-plugins-1.4.10] #./configure -- prefix =/usr/local/nagios

6. After the pre-configuration is complete, information is fed back and Makefile is generated.

-------------------------------------------------------

Config. status: creating po/Makefile

-- With-apt-get-command:

-- With-ping6-command:/bin/ping6-n-U-w % d-c % d % s

-- With-ping-command:/bin/ping-n-U-w % d-c % d % s

With-ipv6: yes

-- With-mysql: no

-- With-openssl: yes

-- With-gnutls: no

-- With-perl:/usr/bin/perl

-- Enable-perl-modules: no

-- With-cgiurl:/nagios/cgi-bin

-- With-trusted-path:/bin:/sbin:/usr/bin:/usr/sbin

-------------------------------------------------------

7. Compile the Nagios-plugins plug-in program

# Make

8. Install the Nagios-plugins plug-in program

[Root@KCentOS5Anagios-plugins-1.4.10] # make install

9. Check the Nagios-plugins plug-in installation.

[Root@KCentOS5Anagios-plugins-1.4.10] # ll/usr/local/nagios/

Total 8

Drwxr-xr-x2 root 4096 Oct 7 0libexec

Drwxr-xr-x3 root 4096 Oct 7 share

10. recursively change the owner of the Nagios main path

[Root @ KCentOS5A ~] # Chown-R nagios. nagios/usr/local/nagios/

11. Check attributes of the main path of Nagios

[Root @ KCentOS5A ~] # Ll/usr/local/| grep nagios

Drwxr-xr-x4 nagios 4096 Oct 7 nagios

[Root @ KCentOS5A ~] # Ll/usr/local/nagios/

Total 8

Drwxr-xr-x2 nagios 4096 Oct 7 libexec

Drwxr-xr-x3 nagios 4096 Oct 7 share

4. Install the NRPE extension program on the monitored Host:

1. decompress the NRPE compressed package

[Root @ KCentOS5A ~] # Tar-zxvf nrpe-2.9.tar.gz

2. Go to the NRPE package directory

[Root @ KCentOS5A ~] # Cd nrpe-2.9

3. Pre-configure the NRPE Installer

[Root@KCentOS5Anrpe-2.9] #./configure

4. After the pre-configuration is complete, a prompt message and a Makefile are displayed.

-------------------------------------------------------

Configure: creating./config. status

Config. status: creating Makefile

Config. status: creating src/Makefile

Config. status: creating subst

Config. status: creating include/config. h

* ** Configuration summary for nrpe 2.9 08-13-2007 ***:

GeneralOptions:

-------------------------

NRPEport: 5666

NRPEuser: nagios

NRPEgroup: nagios

Nagiosuser: nagios

Nagiosgroup: nagios

Reviewthe options abve for accuracy. If they look okay,

Type 'make all' to compile the NRPE daemon and client.

Finally, the system prompts you to continue using the "make all" command to compile the NRPE daemon and client programs.

-------------------------------------------------------

5. Compile the NRPE Program

[Root@KCentOS5Anrpe-2.9] # make all

6. After compilation is successful, a prompt will be reported.

-------------------------------------------------------

* ** Compile finished ***

If thenali daemon and client compiled without any errors, you

Cancontinue with the installation or upgrade process.

Read thePDF documentation (nrpeation) for information on the next

Steps youshocould take to complete the installation or upgrade.

There is a nrpe.pdf manual in the nrpe package. Next, you can refer to the Manual for subsequent operations.

-------------------------------------------------------

Install the NRPE plug-in, daemon, and template daemon configuration files.

Installthe NRPE plugin (for testing), daemon, and sample daemon config file.

7. Install the NRPE plug-in program

[Root@KCentOS5Anrpe-2.9] # make install-plugin

8. Install the NRPE daemon

[Root@KCentOS5Anrpe-2.9] # make install-daemon

9. Install the NRPE Daemon Configuration File

[Root@KCentOS5Anrpe-2.9] # make install-daemon-config

10. Check the installation of the NRPE Program

[Root@KCentOS5Anrpe-2.9] # ll/usr/local/nagios/

-------------------------------------------------------

Total 16

Drwxrwxr-x2 nagios 4096 Oct 7 bin

Drwxrwxr-x2 nagios 4096 Oct 7 etc

Drwxr-xr-x2 nagios 4096 Oct 7 libexec

Drwxr-xr-x 3 nagios 4096 Oct 7 share

Configure and run NRPE on the monitored Host:

1. Configure the main configuration file for NRPE

[Root @ KCentOS5A ~] # Vi/usr/local/nagios/etc/nrpe. cfg

Here are some key settings.

-------------------------------------------------------

Pid_file =/var/run/nrpe. pid

Set the PID file that NRPE runs, which is set by default and does not need to be changed.

Server_port = 5666

This is the system Port occupied by the NRPE daemon.

# Server_address = 0.0.0.0

Server_address = 192.168.1.9 # This is the IP address of the controlled end.

Sets the network interface for the system to listen to NRPE. Generally, a specific IP address is set. If you want multiple NICs, use commas (,) to separate multiple IP addresses. To listen to all network interfaces of the system, you can use "0.0.0.0" to indicate the special addresses of all network interfaces, but you cannot use the wildcard "*".

Nrpe_user = nagios

Nrpe_group = nagios

Set the host user of the NRPE.

Allowed_hosts = 192.168.1.12 # This is the IP address of the monitoring server.

Here is the IP address of the host that allows NRPE interaction with the local machine, that is, the address of the Nagios monitoring server. If you want to specify multiple Nagios servers, use a comma ", to separate multiple IP addresses.

Add the command to be monitored in nrpe. cfg:

Command [check_users] =/usr/local/nagios/libexec/check_users-w 5-c 10

Command [check_load] =/usr/local/nagios/libexec/check_load-w 15, 10, 5-c 30, 25, 20

Command [check_hda1] =/usr/local/nagios/libexec/check_disk-w 20%-c 10%-p/dev/hda1

Command [check_zombie_procs] =/usr/local/nagios/libexec/check_procs-w 5-c 10-s Z

Command [check_total_procs] =/usr/local/nagios/libexec/check_procs-w 150-c 200

Start the daemon nrpe Process

/Usr/local/nagios/bin/nrpe-c/usr/local/nagios/etc/nrpe. cfg-d

Add NRPE run to system startup script

[Root @ KCentOS5A ~] # Echo "/usr/local/nagios/bin/nrpe-c/usr/local/nagios/etc/nrpe. cfg-d ">/etc/rc. d/rc. local

Add host information on the nagios server. Add the host to nagios. cfg.

Export _file =/usr/local/nagios/etc/objects/host160.cfg

Iv. Use plug-ins

Write the plug-in the directory/usr/local/nagios/libexec,

For example:

1. Put the check_cpu.sh file in the libexec directory.

Modify the execution permission.

2. Add the following command to the monitored Host:

Define service {

Host_name 153

Use generic-service

Check_command check_nrpe! Check_cpu_233

Service_description check_cpu_233

Notifications_enabled 1

Event_handler_enabled 1

Max_check_attempts 3

Check_interval 5

Retry_check_interval 2

Notification_options w, u, c

}

Add the following in nrpe. cfg:

Command [check_cpu_233] =/usr/local/nagios/libexec/check_cpu.sh-w 60-c 80

The check_cpu.sh file must be placed in each directory for inspection.

5. Custom notification alert

Specify the service, contacts, and notification methods.

To implement notification methods for specified contacts for a specified service,

Add the notification sending time to timeperiods. cfg.

Define timeperiod {

Timeperiod_name notify_at_8

Alias once_a_day

Sunday-

Monday-

Tuesday-

Wednesday-

Thursday-

Friday-

Saturday-

}

Define the contacts to be notified:

Define contact {

Contact_name policyadmin

Alias wu

Use generic-contact

Service_icationication_commands notify-service-by-qqemail # notification command

Email XXXX@163.com

}

We add services to the specified host.

Define service {

Host_name localhost

Use local-service

Service_descriptionpolicy_at_800

Contacts policyadmin # specify a contact

Check_command yy_at_800 # defines a service check command to trigger notification sending.

Check_period yy_at_8 # defines the detection time.

Icationication_period yy_at_8 # detection Interval

}

Restart the service to send messages within a specified period of time.