[Centos 8] Nagios Core - 서버 편

 

Nagios

 

yum update && upgrade

 

-----------------------기본 패키지 설치--------------------

yum –y install httpd php php-mysql mysql mysql-server

 

----------------------------selinux 해제---------------------------------

# vu /etc/selinux/config

SELINUX=disabled

 

----------------------------필수 설치 패키지 -----------------------

yum –y install gcc glibc glibc-common wget unzip gd gd-devel xinetd make gettext automake wget openssl-devel epel-release autoconf sendmail perl perl-CGI

 

yum group install “development tools”

 

---------------------------계정 생성-----------------------------------

# useradd –m Nagios

# passwd Nagios

 

 

# groupadd nagomd

# usermod –a –G nagomd Nagios

# usermod –a –G nagomd apache

 

-----------------------Nagios core 설치-------------------------

# wget -O nagioscore.tar.gz https://github.com/NagiosEnterprises/nagioscore/releases/download/nagios-4.4.6/nagios-4.4.6.tar.gz

 

# tar xvfz nagioscore.tar.gz

# cd nagioscore-nagios-4.3.4/

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

# make all

# make install

 

# make install-init

# make install-config

# make intall-commandmode

 

-----------------------------Nagios 설정---------------------------------\

# vi /usr/local/nagios/etc/objects/contacts.cfg

email 부분 수정 Alert mail 수신을 위함

 

---------------------------------Web Interface 설정--------------------

# make install-webconf

>> 웹 접속자 용 계정 만들기

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

 

service httpd start

systemctl status httpd

 

--------------------------Nagios plugin 설치(Nagios 서버)---------

cd /tmp

wget http://nagios-plugins.org/download/nagios-plugins-2.3.3.tar.gz

# tar -zxvf /tmp/nagios-plugins-2.3.3.tar.gz

# cd /tmp/nagios-plugins-*/

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

 

# make && make install

# make install

 

// nagios 서비스 실행

# chkconfig nagios on

 

>> nagios 이상유무를 위한 테스트

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

 

>> 서비스 시작

# service nagios start

# systemctl enable nagios.service

# systemctl status nagios

 

# http://서버IP/nagios/ 접속

 

※ 업그레이드 할경우 Nagios 실행파일 재실행

systemctl daemon-reload

service nagios checkconfig

service nagios restart

 

사진 삭제

사진 설명을 입력하세요.

 

-----------------------------Nagios NRPE 설치------------------------

# wget https://github.com/NagiosEnterprises/nrpe/releases/download/nrpe-4.0.3/nrpe-4.0.3.tar.gz

# tar nrpe-4.0.3.tar.gz

 

# cd nrpe-nrpe-4.0.3

# ./configure

# make all

# make && make install

 

# cp -arp sample-config/nrpe.cfg /usr/local/nagios/etc

 

# make install-xinetd

 

--------------------------------------포트 개방----------------------------

# vi /etc/services

nrpe 5666/tcp # NRPE

amqps 5671/tcp # amqp protocol over TLS/SSL

 

# firewall-cmd --add-port=80/tcp

# firewall-cmd --add-port=5666/tcp

# firewall-cmd --add-port=5671/tcp

# firewall-cmd --runtime-to-permanent

 

>> 포트 확인

# firewall-cmd --list-ports

 

 

# vi /usr/local/nagios/etc/objects/commands.cfg

 

 

>> 맨 아래에 내용추가

# 'check_nrpe' command definition

define command{

command_name check_nrpe

command_line /usr/local/nagios/libexec/check_nrpe -H $HOSTADDRESS$ -c $ARG1$

}

 

# service xinetd restart

 

※ 이벤트 로그 확인을 위한 OS 시간 변경

timedatectl set-timezone Asia/Seoul

 

vi /etc/chrony.conf

 

# Use public servers from the pool.ntp.org project.

# Please consider joining the pool (http://www.pool.ntp.org/join.html).

​

server 0.kr.pool.ntp.org

server 1.asia.pool.ntp.org

server 2.asia.pool.ntp.org

server 3.asia.pool.ntp.org

server 4.asia.pool.ntp.org

 

systemctl restart chronyd

timedatectl >>변경 시간 확인