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    lnmp 安装nagios

    技术随笔 果果 5305浏览 1评论

    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。

    nagios1

    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

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    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

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    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

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    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

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    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

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    vi /usr/local/nginx/perl-fcgi.pl
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    #!/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

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    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。

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    vi /usr/local/nginx/start_perl_cgi.sh
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    #!/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

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    chmod 755 /usr/local/nginx/start_perl_cgi.sh

    启动perl_cgi

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    /usr/local/nginx/start_perl_cgi.sh start

    5、Nagios安装(服务端)

    下载

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    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
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    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

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    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

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    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

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    include nagios.conf;
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    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/

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    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

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    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

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    #/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

    转载请注明：果果.IT » lnmp 安装nagios

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