之前果果介绍了 lnmp下面安装cacti，一台服务器只放一个cacit有一些浪费，这次果果继续在上面安装nagios。
lnmp的安装就不介绍了。
nagios是cgi方式运行，nginx是不支持的，所以我们要以FastCGI运行。
1、安装FCGI
wget http://search.cpan.org/CPAN/authors/id/F/FL/FLORA/FCGI-0.73.tar.gz tar xvzf FCGI-0.73.tar.gz cd FCGI-0.73 perl Makefile.PL make make install
2、安装FCGI-ProcManager
wget http://search.cpan.org/CPAN/authors/id/G/GB/GBJK/FCGI-ProcManager-0.19.tar.gz tar xvzf FCGI-ProcManager-0.19.tar.gz cd FCGI-ProcManager-0.19 perl Makefile.PL make make install
安装IO模块
wget http://search.cpan.org/CPAN/authors/id/G/GB/GBARR/IO-1.25.tar.gz tar zxvf IO-1.25.tar.gz cd IO-1.25 perl Makefile.PL make make install cd ..
安装IO::ALL 模块
wget http://search.cpan.org/CPAN/authors/id/I/IN/INGY/IO-All-0.81.tar.gz tar zxvf IO-All-0.41.tar.gz cd IO-All-0.41 perl Makefile.PL make make install cd ..
3、安装Perl脚本
这个脚本是执行Perl关键，果果修改过，解决在nagios 提交的时候502错误。
这个可以直接放在nginx目录
vi /usr/local/nginx/perl-fcgi.pl
#!/usr/bin/perl
#
# author Daniel Dominik Rudnicki
# thanks to: Piotr Romanczuk
# email daniel@sardzent.org
# version 0.4.3
# webpage http://www.nginx.eu/
#
# BASED @ http://wiki.codemongers.com/NginxSimpleCGI
#
#
# use strict;
use FCGI;
use Getopt::Long;
use IO::All;
use Socket;
sub init {
GetOptions( "h" => \$help,
"verbose!"=>\$verbose,
"pid=s" => \$filepid,
"l=s" => \$logfile,
"S:s" => \$unixsocket,
"P:i" => \$unixport) or usage();
usage() if $help;
print " Starting Nginx-fcgi\n" if $verbose;
print " Running with $> UID" if $verbose;
print " Perl $]" if $verbose;
if ( $> == "0" ) {
print "\n\tERROR\tRunning as a root!\n";
print "\tSuggested not to do so !!!\n\n";
exit 1;
}
if ( ! $logfile ) {
print "\n\tERROR\t log file must declared\n"
. "\tuse $0 with option -l filename\n\n";
exit 1;
}
print " Using log file $logfile\n" if $verbose;
"\n\n" >> io($logfile);
addlog($logfile, "Starting Nginx-cfgi");
addlog($logfile, "Running with $> UID");
addlog($logfile, "Perl $]");
addlog($logfile, "Testing socket options");
if ( ($unixsocket && $unixport) || (!($unixsocket) && !($unixport)) ) {
print "\n\tERROR\tOnly one option can be used!\n";
print "\tSuggested (beacuse of speed) is usage UNIX socket -S \n\n";
exit 1;
}
if ($unixsocket) {
print " Daemon listening at UNIX socket $unixsocket\n" if $versbose;
addlog($logfile, "Deamon listening at UNIX socket $unixsocket");
} else {
print " Daemon listening at TCP/IP socket *:$unixport\n" if $verbose;
#
addlog($logfile, "Daemon listening at TCP/IP socket *:$unixport");
}
if ( -e $filepid ) {
print "\n\tERROR\t PID file $filepid already exists\n\n";
addlog($logfile, "Can not use PID file $filepid, already exists.");
exit 1;
}
if ( $unixsocket ) {
print " Creating UNIX socket\n" if $verbose;
$socket = FCGI::OpenSocket( $unixsocket, 10 );
if ( !$socket) {
print " Couldn't create socket\n";
addlog($logfile, "Couldn't create socket");
exit 1;
}
print " Using UNIX socket $unixsocket\n" if $verbose;
} else {
print " Creating TCP/IP socket\n" if $verbose;
$portnumber = ":".$unixport;
$socket = FCGI::OpenSocket( $unixport, 10 );
if ( !$socket ) {
print " Couldn't create socket\n";
addlog($logfile, "Couldn't create socket");
exit 1;
}
print " Using port $unixport\n" if $verbose;
}
addlog($logfile, "Socket created");
if ( ! $filepid ) {
print "\n\tERROR\t PID file must declared\n"
. "\tuse $0 with option -pid filename\n\n";
exit 1;
}
print " Using PID file $filepid\n" if $verbose;
addlog($logfile, "Using PID file $filepid");
my $pidnumber = $$;
$pidnumber > io($filepid);
print " PID number $$\n" if $verbose;
addlog($logfile, "PID number $pidnumber");
}
sub addzero {
my ($date) = shift;
if ($date < 10) {
return "0$date";
}
return $date;
}
sub logformat {
my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$iddst) = localtime(time);
my $datestring;
$year += 1900;
$mon++;
$mon = addzero($mon);
$mday = addzero($mday);
$min = addzero($min);
$datestring = "$year-$mon-$mday $hour:$min";
return($datestring);
}
sub addlog {
my ($log_file, $log_message) = @_;
my $curr_time = logformat();
my $write_message = "[$curr_time] $log_message";
$write_message >> io($log_file);
"\n" >> io($log_file);
}
sub printerror {
my $message = @_;
print "\n Nginx FastCGI\tERROR\n"
. "\t $message\n\n";
exit 1;
}
sub usage {
print "\n Nginx FastCGI \n"
. "\n\tusage: $0 [-h] -S string -P int\n"
. "\n\t-h\t\t: this (help) message"
. "\n\t-S path\t\t: path for UNIX socket"
. "\n\t-P port\t\t: port number"
. "\n\t-p file\t\t: path for pid file"
. "\n\t-l file\t\t: path for logfile"
. "\n\n\texample: $0 -S /var/run/nginx-perl_cgi.sock -l /var/log/nginx/nginx-cfgi.log -pid /var/run/nginx-fcgi.pid\n\n";
exit 1;
}
init;
#
END() { } BEGIN() { }
*CORE::GLOBAL::exit = sub { die "fakeexit\nrc=".shift()."\n"; }; eval q{exit};
if ($@) {
exit unless $@ =~ /^fakeexit/;
} ;
# fork part
my $pid = fork();
if( $pid == 0 ) {
&main;
exit 0;
}
print " Forking worker process with PID $pid\n" if $verbose;
addlog($logfile, "Forking worker process with PID $pid");
print " Update PID file $filepid\n" if $verbose;
addlog($logfile, "Update PID file $filepid");
$pid > io($filepid);
print " Worker process running.\n" if $verbose;
addlog ($logfile, "Parent process $$ is exiting");
exit 0;
sub main {
$request = FCGI::Request( \*STDIN, \*STDOUT, \*STDERR, \%req_params, $socket );
if ($request) { request_loop()};
FCGI::CloseSocket( $socket );
}
sub request_loop {
while( $request->Accept() >= 0 ) {
# processing any STDIN input from WebServer (for CGI-POST actions)
$stdin_passthrough = '';
$req_len = 0 + $req_params{'CONTENT_LENGTH'};
if (($req_params{'REQUEST_METHOD'} eq 'POST') && ($req_len != 0) ){
while ($req_len) {
$stdin_passthrough .= getc(STDIN);
$req_len--;
}
}
# running the cgi app
if ( (-x $req_params{SCRIPT_FILENAME}) &&
(-s $req_params{SCRIPT_FILENAME}) &&
(-r $req_params{SCRIPT_FILENAME})
){
foreach $key ( keys %req_params){
$ENV{$key} = $req_params{$key};
}
if ( $verbose ) {
addlog($logfile, "running $req_params{SCRIPT_FILENAME}");
}
# http://perldoc.perl.org/perlipc.html#Safe-Pipe-Opens
#
###20160120 liaoxg
#open $cgi_app, '-|', $req_params{SCRIPT_FILENAME}, $stdin_passthrough or print("Content-type: text/plain\r\n\r\n"); print "Error: CGI app returned no output - Executing $req_params{SCRIPT_FILENAME} failed !\n"; # addlog($logfile, "Error: CGI app returned no output - Executing $req_params{SCRIPT_FILENAME} failed !");
open $cgi_app, '-|', "echo '$stdin_passthrough' | '$req_params{SCRIPT_FILENAME}'" or print("Content-type: text/plain\r\n\r\n"); print "Error: CGI app returned no output - Executing $req_params{SCRIPT_FILENAME} failed !\n"; # addlog($logfile, "Error: CGI app returned no output - Executing $req_params{SCRIPT_FILENAME} failed !");
if ($cgi_app) {
print <$cgi_app>;
close $cgi_app;
}
} else {
print("Content-type: text/plain\r\n\r\n");
print "Error: No such CGI app - $req_params{SCRIPT_FILENAME} may not exist or is not executable by this process.\n";
addlog($logfile, "Error: No such CGI app - $req_params{SCRIPT_FILENAME} may not exist or is not executable by this process.");
}
}
}
修改权限
chmod 755 /usr/local/nginx/perl-fcgi.pl
4、建立一个CGI启动/停止脚本
这个SHELL脚本只是为了方便管理上面的Perl脚本。脚本中的www为nginx的运行用户，请据自己的实际情况调整。
注意事项：不能用root用户执行(会提示). 要用与Nginx相同身份的用户执行。否则可能会在Nginx Log中提示 Permision Denied。
vi /usr/local/nginx/start_perl_cgi.sh
#!/bin/bash
#set -x
dir=/usr/local/nginx/
stop ()
{
#pkill -f $dir/perl-fcgi.pl
kill $(cat $dir/logs/perl-fcgi.pid)
rm $dir/logs/perl-fcgi.pid 2>/dev/null
rm $dir/logs/perl-fcgi.sock 2>/dev/null
echo "stop perl-fcgi done"
}
start ()
{
rm $dir/now_start_perl_fcgi.sh 2>/dev/null
chown www.www $dir/logs
echo "$dir/perl-fcgi.pl -l $dir/logs/perl-fcgi.log -pid $dir/logs/perl-fcgi.pid -S $dir/logs/perl-fcgi.sock" >>$dir/now_start_perl_fcgi.sh
chown www.www $dir/now_start_perl_fcgi.sh
chmod u+x $dir/now_start_perl_fcgi.sh
sudo -u www $dir/now_start_perl_fcgi.sh
echo "start perl-fcgi done"
}
case $1 in
stop)
stop
;;
start)
start
;;
restart)
stop
start
;;
esac
修改脚本权限，使之可以执行
chmod 755 /usr/local/nginx/start_perl_cgi.sh
启动perl_cgi
/usr/local/nginx/start_perl_cgi.sh start
5、Nagios安装(服务端)
下载
wget https://assets.nagios.com/downloads/nagioscore/releases/nagios-4.1.1.tar.gz wget http://nagios-plugins.org/download/nagios-plugins-2.1.1.tar.gz
useradd -s /sbin/nologin nagios groupadd nagcmd usermod -a -G nagcmd nagios usermod -a -G nagcmd www tar xzf nagios-4.1.1.tar.gz cd nagios yum -y install gd-devel ./configure --prefix=/usr/local/nagios --with-command-group=nagcmd make all make install #用于安装主要的程序、CGI及HTML文件 make install-init #用于生成init启动脚本 make install-config #用于安装示例配置文件 make install-commandmode #用于设置相应的目录权限 chkconfig --add nagios chkconfig nagios on cd ../
安装插件
tar xzf nagios-plugins-2.1.1.tar.gz cd nagios-plugins-1.4.16 ./configure --prefix=/usr/local/nagios --with-nagios-user=nagios --with-nagios-group=nagios make make install cd ../
6、Nagios客户端安装
wget http://nchc.dl.sourceforge.net/project/nagios/nrpe-2.x/nrpe-2.14/nrpe-2.14.tar.gz tar xzf nrpe-2.14.tar.gz cd nrpe-2.14 ./configure make make install cp sample-config/nrpe.cfg /usr/local/nagios/etc/ chown nagios.nagios /usr/local/nagios/etc/nrpe.cfg cd ../
7、nginx站点配置
新建一个站点，在nginx.conf 最后加入
include nagios.conf;
vi nagios.conf
里面加入这些内容，果果用的是8899端口，注意修改路径，果果是安装在 /usr/local/nagios/
server {
listen 8899;
server_name 192.168.1.238;
access_log logs/nagios_access.log combined;
auth_basic "Nagios Access";
auth_basic_user_file /usr/local/nagios/etc/htpasswd.users;
location / {
root /usr/local/nagios/share;
index index.html index.htm index.php;
}
location ~ .*\.(php|php5)?$ {
root /usr/local/nagios/share;
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include fastcgi.conf;
}
location /nagios {
alias /usr/local/nagios/share;
}
location /cgi-bin/images {
alias /usr/local/nagios/share/images;
}
location /cgi-bin/stylesheets {
alias /usr/local/nagios/share/stylesheets;
}
location /cgi-bin {
alias /usr/local/nagios/sbin;
}
location ~ .*\.(cgi|pl)?$ {
gzip off;
root /usr/local/nagios/sbin;
rewrite ^/nagios/cgi-bin/(.*)\.cgi /$1.cgi break;
fastcgi_pass unix:/usr/local/nginx/logs/perl-fcgi.sock;
fastcgi_param SCRIPT_FILENAME /usr/local/nagios/sbin$fastcgi_script_name;
fastcgi_index index.cgi;
fastcgi_param REMOTE_USER $remote_user;
fastcgi_param HTTP_ACCEPT_LANGUAGE en_US;
include fastcgi_params;
fastcgi_read_timeout 60;
}
修改nagios的登陆用户密码，这里需要用到apache的 htpasswd，
htpasswd.users记录了密码，下面是 admin用户 密码 123456
htpasswd -nb admin 123456 > /usr/local/nagios/etc/htpasswd.users chown nagios.nagios /usr/local/nagios/etc/htpasswd.users
如果没有apache，我们可以利用在线生成工具
http://tool.oschina.net/htpasswd
最后用 命令测试nginx有没有错误
#/usr/local/nginx/sbin/nginx -t nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
没有错误，重启nginx，用网页就可以看到nagios的页面。
好了，安装完成了，下一篇果果再来介绍nagios的配置，果果把能想到的都说到了，但难免有错误，欢迎大家指出，果果参考了很多教程
http://www.open-open.com/lib/view/1328680567780
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