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How to Install and Configure RANCID v2.3.8 on CentOS 6.x with CVSWeb

RANCID (Really Awesome New Cisco confIg Differ) is a software created by Shubbery Networks Inc. that monitors network device configs for changes and saves all information in a CVS or Subversion system for backups.
RANCID can be found at
http://www.shrubbery.net/rancid/
The reason why we use v2.3.8 is because some device types are not compatible with rancid v3.0+.

From the Rancid 3.0 Release Notes

Not all of the device types have been converted to libraries yet, just
the prominent ones or those prominent to us: Cisco, Juniper, Compass,
Arbor, MRV.  We also still have suggestions from users about this new
process to consider and/or implement.

Install Pre-requisites

Download specific version of RANCID from shrubbery.net – ftp://ftp.shrubbery.net/pub/rancid/rancid-2.3.8.tar.gz
expect >= 5.40, gcc, make, cvs, wget

1. Install and Configure

Download rancid-2.3.8.tar.gz to your home folder wget ftp://ftp.shrubbery.net/pub/rancid/rancid-2.3.8.tar.gz ~
Extract rancid-2.3.8.tar.gz with tar xvf ~/rancid-2.3.8.tar.gz
A folder called rancid-2.3.8 will be created in your home folder containing rancid
We will be installing rancid in the /opt folder
Go into rancid-2.3.8 folder
Preconfigure rancid with ./configure –prefix=/opt/rancid/
Compile rancid with make install
Copy sample cloginrc to rancid cp cloginrc.sample /opt/rancid/.cloginrc
Modify permissions on .cloginrc chmod 0640 /opt/rancid/.cloginrc
Change ownership chown -R rancid:netadm /opt/rancid/
Modify rancid folder permissions chmod 770 /opt/rancid/

2. Add rancid user and netadm group

Create group netadm with groupadd netadm
Create user with useradd -g netadm -c “Networking Backups” -d /opt/rancid rancid

3. Configure rancid group and email

edit /opt/rancid/etc/rancid.conf, uncomment and edit the following
- LIST_OF_GROUPS=”networking“
edit /etc/aliases and add/edit the following
- rancid-admin-networking: rancid-networking
  rancid-networking: noc
  noc: your@email.com
Run newaliases to commit the modified aliases file

4. Turn on CVS Versioning

Switch over to the rancid user for this step with su – rancid
Execute /opt/rancid/bin/rancid-cvs to initiate cvs repository

[rancid@rancid-server ~]$ /opt/rancid/bin/rancid-cvs
No conflicts created by this import
cvs checkout: Updating networking
Directory /opt/rancid/var/CVS/networking/configs added to the repository
cvs commit: Examining configs
cvs add: scheduling file `router.db’ for addition
cvs add: use ‘cvs commit’ to add this file permanently
RCS file: /opt/rancid/var/CVS/networking/router.db,v
done
Checking in router.db;
/opt/rancid/var/CVS/networking/router.db,v <– router.db
initial revision: 1.1
done

5. Create Crontab job to poll devices hourly and prune logs daily

Run crontab -e under rancid user
Add the following to the crontab

0 3 * * * /opt/rancid/bin/rancid-run # daily rancid run
0 1 * * * find /opt/rancid/var/logs -type f -mtime +30 -exec rm {} \; # Prune logs > 30 days at 1am daily

6. Add a network device to Rancid

Modify vi /opt/rancid/var/networking and enter in network device and type

#host:type:status
# make sure you use : instead of ;
192.168.0.100:arista:up
192.168.0.101:force10:up

Device types can be found at http://www.shrubbery.net/rancid/man/router.db.5.html

Modify /opt/rancid/.cloginrc and add the following for the device entry above

#Make method SSH only for 192.168.0.100 device
#Remove or comment out ALL other entries in default .cloginrc or it may fail
add method 192.168.0.100 ssh
add user 192.168.0.100 USERNAME
add password 192.168.0.100 PASSWORD ENABLEPASSWORD

Test login by running /opt/rancid/bin/clogin 192.168.0.100

7. Install CVSWeb and Dependencies

Do all commands under root
Install CVSWeb and Dependencies by running yum install perl-IPC-Run perl-URI rcs httpd -y
Download cvsweb by running wget http://people.freebsd.org/~scop/cvsweb/cvsweb-3.0.6.tar.gz ~
Extract cvsweb by running tar xvf ~/cvsweb-3.0.6.tar.gz
Make cvsweb folder and css folder mkdir -p /usr/local/etc/cvsweb /var/www/html/css/
Copy cvsweb files to needed locations and set permissions

cp -a ~/cvsweb-3.0.6/cvsweb.conf /usr/local/etc/cvsweb/
cp -a ~/cvsweb-3.0.6/cvsweb.cgi /var/www/cgi-bin/
cp -a ~/cvsweb-3.0.6/css/cvsweb.css /var/www/html/css/cvsweb.css
chmod 755 /var/www/cgi-bin/cvsweb.cgi

Modify cvsweb.conf in /usr/local/etc/cvsweb

[…] @CVSrepositories =
( ‘local’ => [‘Local Repository’, ‘/opt/rancid/var/CVS’], );
[…]

Restart apache service httpd restart
Add apache user to netadm group useradd -G netadm rancid
Add rancid user to netadm group useradd -G netadm rancid

Make sure you open up port 80 on iptables if iptables is on
Visit your webpage by going to: http://your-server-ip/cgi-bin/cvsweb.cgi/

(http://www.richardyau.com/?p=11)

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Auto restart server if virtual memory is too low

10:49 AMdatabom0 bình luận

Check how much memory is left on the VPS.
If 500M memory is left , reboot the VPS.

This could be done as follow

Write a script that checks how much memory is left and reboot the VPS
Add this script to crontab and for automatization

e.g

#!/bin/bash

mem=$(free -m | awk '/Mem:/{print $4}')

(( mem <= 500 )) && reboot

Make the script executable
chmod +x scriptname // note don't add an extension
Add the script to the cron
crontab -e

* * * * * user_to_run_the_script /path/to/the/script

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Setup SSMTP để Naigos sử dụng email ID gmail gửi mail alert

10:13 AMdatabom0 bình luận

Setup SSMTP để Naigos sử dụng email ID gmail gửi mail alert

- Stop dịch vụ smtp mặc định

service sendmail stop

chkconfig sendmail off

hoặc

service postfix stop

chkconfig postfix off

- Download và cập nhật database các phần mềm mới

wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

rpm -Uvh epel-release-6-8.noarch.rpm

- Cài đặt SSMTP

yum install ssmtp mailx

- Cấu hình ssmtp

+ Edit /etc/ssmtp/ssmtp.conf

FromLineOverride=YES

root=nagios

mailhub=smtp.gmail.com:587

UseTLS=YES

UseSTARTTLS=YES

AuthUser=abc@email.com

AuthPass=<pass plaintext>

- Thay đổi MTA mặc định

alternatives --config mta

*+ 1           /usr/sbin/sendmail.postfix

  2           /usr/sbin/sendmail.ssmtp

Enter to keep the current selection[+], or type selection number:

chọn 2

- Gửi mail test

echo "Testing outgoing email" | mailx -s "Testing" abc@domain.com

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Setup Nagios 4x trên Centos 6.5

10:10 AMdatabom0 bình luận

Setup Nagios 4x trên Centos 6.5

- Cài đặt các gói packages cần thiết trước khi cài đặt nagios.

#yum install httpd php gcc glibc glibc-common gd gd-devel openssl-devel wget perl make

- Tạo user nagios/password

#useradd -m nagios

#passwd nagios

- Tạo group nagcmd. Chuyển user nagios và apache vào groups nagcmd

#groupadd nagcmd

#usermod -a -G nagcmd nagios

#usermod -a -G nagcmd apache

- Taọ thư mục tạm để chứa gói cài đặt nagios

#mkdir nagiossource

#cd nagiossource

- Download gói cài đặt nagios và nagios plugins

#wget http://prdownloads.sourceforge.net/sourceforge/nagios/nagios-4.0.2.tar.gz

#wget https://www.nagios-plugins.org/download/nagios-plugins-1.5.tar.gz

- Giải nén gói cài đặt nagios

#tar zxvf nagios-4.0.2.tar.gz

#cd nagios-4.0.2

- Cài đặt nagios

#./configure --with-command-group=nagcmd

#make all

#make install

#make install-init

#make install-config

#make install-commandmode

#make install-webconf

- Tạo account nagiosadmin để login vào website

#htpasswd -c /usr/local/nagios/etc/htpasswd.users nagiosadmin

- Khởi động dịch vụ web

#service httpd start

- Cài đặt plugins nagios

#tar zxvf nagios-plugins-1.5.tar.gz

#cd nagios-plugins-1.5

#./configure --with-nagios-user=nagios --with-nagios-group=nagios
#make
#make install

- Cấu hình nagios autostart

#chkconfig --add nagios
#chkconfig nagios on

- Cấu hình Selinux cho nagios

#chcon -R -t httpd_sys_content_t /usr/local/nagios/sbin/
#chcon -R -t httpd_sys_content_t /usr/local/nagios/share/

- Cấu hình iptables cho phép truy xuất port 80

#vi /etc/sysconfig/iptables

-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT

Cấu hình Nagios

- Cấu hình file /usr/local/nagios/etc/nagios.cfg

+ comment các dòng sau:

cfg_file=/usr/local/nagios/etc/objects/commands.cfg

cfg_file=/usr/local/nagios/etc/objects/contacts.cfg

cfg_file=/usr/local/nagios/etc/objects/timeperiods.cfg

cfg_file=/usr/local/nagios/etc/objects/templates.cfg

cfg_file=/usr/local/nagios/etc/objects/localhost.cfg

+ Thêm vào các dòng cấu hình sau:

############# Hinh Duong Dan Den Cac File Define ######################

cfg_file=/usr/local/nagios/etc/contacts.cfg

cfg_file=/usr/local/nagios/etc/commands.cfg

cfg_file=/usr/local/nagios/etc/generic-host.cfg

cfg_file=/usr/local/nagios/etc/generic-service.cfg

cfg_file=/usr/local/nagios/etc/hostgroups.cfg

cfg_file=/usr/local/nagios/etc/services.cfg

cfg_file=/usr/local/nagios/etc/timeperiods.cfg

cfg_dir=/usr/local/nagios/etc/servers

- Tạo các file: contacts.cfg, commands.cfg, generic-host.cfg, generic-service.cfg, hostgroups.cfg, services.cfg, timeperiods.cfg (các file nay có file mẫu trong /usr/local/nagios/etc/objects/ )

- Cấu hình server cần giám sát

+ Tạo file /usr/local/nagios/etc/servers/hcm.cfg

############## Server nagios #############

define host{

              use                     generic-host

        host_name         Nagios-server

     alias                    Nagios Server

       address              IP server

        hostgroups         hcm-servers

}

define host{

              use                     generic-host

        host_name         Server1-hcm

     alias                    Server1 HCM

       address              IP server

        hostgroups         hcm-servers

}

+ Tạo file /usr/local/nagios/etc/servers/danang.cfg

############## Server nagios #############

define host{

              use                     generic-host

        host_name         server1-danang

     alias                    Server1 Da Nang

       address              IP server

        hostgroups         danang-servers

}

- Cấu hình file hostgroups.cfg

define hostgroup{

     hostgroup_name         hcm-servers

alias                    HCM Servers

       members                  Nagios-server, win-server

    }

- Cấu hình file servicegroups.cfg

define servicegroup{

     servicegroup_name    ping-services

   alias                    Ping Services

     members                  win-server,PING,Nagios-server,PING

        }

- Các service check trên windows được hỗ trợ bởi Nagios

define service{
use                  generic-service
host_name            remote-windows-host
service_description NSClient++ Version
check_command        check_nt!CLIENTVERSION
}
define service{
use                  generic-service
host_name            remote-windows-host
service_description Uptime
check_command        check_nt!UPTIME
}
define service{
use                  generic-service
host_name            remote-windows-host
service_description CPU Load
check_command        check_nt!CPULOAD!-l 5,80,90
}
define service{
use                  generic-service
host_name            remote-windows-host
service_description Memory Usage
check_command        check_nt!MEMUSE!-w 80 -c 90
}
define service{
use                  generic-service
host_name            remote-windows-host
service_description C:\ Drive Space
check_command        check_nt!USEDDISKSPACE!-l c -w 80 -c 90
}
define service{
use                  generic-service
host_name            remote-windows-host
service_description W3SVC
check_command        check_nt!SERVICESTATE!-d SHOWALL -l W3SVC # check The Internet Information Services (IIS) World Wide Web Publishing Service
}
define service{
use                  generic-service
host_name            remote-windows-host
service_description Explorer
check_command        check_nt!PROCSTATE!-d SHOWALL -l Explorer.exe # có thể check các dịch vụ khác, thay explorer.exe bằng tên dịch vụ được hiển thị trong task manager
}

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How to Install and Configure RANCID v2.3.8 on CentOS 6.x with CVSWeb

Install Pre-requisites

1. Install and Configure

2. Add rancid user and netadm group

3. Configure rancid group and email

4. Turn on CVS Versioning

5. Create Crontab job to poll devices hourly and prune logs daily

6. Add a network device to Rancid

7. Install CVSWeb and Dependencies

Auto restart server if virtual memory is too low

Setup SSMTP để Naigos sử dụng email ID gmail gửi mail alert

Setup Nagios 4x trên Centos 6.5

Danh mục

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