Shulou(Shulou.com)05/31 Report--

This article mainly explains the "Nginx dynamic example analysis", the content of the article is simple and clear, easy to learn and understand, the following please follow the editor's ideas slowly in depth, together to study and learn "Nginx dynamic example analysis" bar!

Environment:

CentOS 6.4.The ip:192.168.1.113 domain name: www.sunsky.com (both server and client are parsed through hosts files) nginx-1.2.9 is compiled and installed, path / usr/local/nginx. The log record format of the service enabled status is nginx default. Do not change it, otherwise awstats will not be able to analyze the log. Log_format main'$remote_addr-$remote_user [$time_local] "$request"'$status $body_bytes_sent "$http_referer"'"$http_user_agent"$http_x_forwarded_for"; awstats-7.2.tar.gz CPAN-2.00.tar.gz FCGI-0.74.tar.gz FCGI-ProcManager-0.24.tar.gz must have perl-devel, otherwise FCGI cannot be compiled.

I. automatic log cutting

For nginx log cutting, because we do not use the cronolog tool like apache, here we write a script that can be executed automatically at 00:01 every day to cut yesterday's log (to be analyzed by awstats), and compress the log the day before yesterday (compress the log can reduce the storage space, in order to prevent awstats from being compressed without finishing the analysis, so only compress the log the day before yesterday).

Vim / server/scripts/cut_nginx_log.sh

Enter the following:

#! / bin/sh yesterday= `date-d "yesterday" + "% Y%m%d" `date-d "- 2 day" + "% Y%m%d" `Nginx_Dir= "/ usr/local/nginx" Nginx_logs= "/ app/logs" Log_Name= "www_access" cd / tmp [- d $Nginx_Logs] & & cd $Nginx_logs | exit 1 [- f $Log_Name.log] & & / bin/mv $Log_Name.log ${Log_Name} _ ${yesterday} .log | | exit 1 if [$?-eq 0-a-f $Nginx_Dir/logs/nginx.pid] then kill-USR1 `cat $Nginx_Dir/logs/ nginx.pid`fi [- f ${Log_Name} _ ${before_yesterday} .log] & / usr/bin/gzip ${Log_Name} _ ${before_yesterday} .log | exit 1

Execute crontab-e to add the script to the scheduled task

1 0 * / bin/sh / server/scripts/cut_nginx_log.sh > / dev/null 2 > & 1

In this way, you can automatically achieve log cutting, compression and other functions at 00:01 every morning.

Because the nginx under this experiment already has a log at this time, and in order to analyze the cut log later on, we need to run this script to cut the existing log to generate yesterday's log to facilitate later operation.

/ bin/sh / server/scripts/cut_nginx_log.sh > / dev/null 2 > & 1

2. Configure FCGI

1. Install CPAN

Wget http://search.cpan.org/CPAN/authors/id/A/AN/ANDK/CPAN-2.00.tar.gz tar zxf CPAN-2.00.tar.gz cd CPAN-2.00 perl Makefile.PL make & & make install

2. Install FCGI and FCGI::ProcManager

The first installation method of wget http://search.cpan.org/CPAN/authors/id/F/FL/FLORA/FCGI-0.74.tar.gz tar zxf FCGI-0.74.tar.gz cd FCGI-0.74: perl-MCPAN-e'install FCGI' the second installation method: perl Makefile.PL make&&make install wget http://search.cpan.org/CPAN/authors/id/B/BO/BOBTFISH/FCGI-ProcManager-0. The first installation method of 24.tar.gz tar zxf FCGI-ProcManager-0.24.tar.gz cd FCGI-ProcManager-0.24: perl-MCPAN-e 'install FCGI::ProcManager' the second installation method: perl Makefile.PL make&&make install

When you execute the first installation method, you must automatically scroll down to prompt OK. If you are prompted to enter yes or the like, you need to follow the prompt and run it a second time until the full automatic scrolling down prompts OK to complete the installation. Or you can use the second method to perform the installation.

3. Create FCGI startup file

Vi / usr/local/nginx/sbin/fcgi # name here #! / usr/bin/perl use FCGI; # perl-MCPAN-e 'install FCGI' use Socket; use POSIX qw (setsid); # use Fcntl; require' syscall.ph'; & daemonize; # this keeps the program alive or something after exec'ing perl scripts END () {} BEGIN () {} * CORE::GLOBAL::exit = sub {die "fakeexit\ nrc=" .shift (). "\ n" }; eval Q {exit}; if ($@) {exit unless $@ = ~ / ^ fakeexit/;}; & main; sub daemonize () {chdir'/'or die "Can't chdir to /: $!"; defined (my $pid = fork) or die "Can't fork: $!"; exit if $pid; setsid or die "Can't start a new session: $!"; umask 0 } sub main {# $socket = FCGI::OpenSocket ("127.0.0.1 socket 8999", 10); $socket = FCGI::OpenSocket ("/ usr/local/nginx/fastcgi_temp/perl_cgi-dispatch.sock", 10); # use UNIX sockets-user running this script must have w access to the 'nginx' folderboat! $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)) {my $bytes_read = 0; while ($bytes_read

< $req_len) { my $data = ''; my $bytes = read(STDIN, $data, ($req_len - $bytes_read)); last if ($bytes == 0 || !defined($bytes)); $stdin_passthrough .= $data; $bytes_read += $bytes; } } #running the cgi app if ( (-x $req_params{SCRIPT_FILENAME}) && #can I execute this? (-s $req_params{SCRIPT_FILENAME}) && #Is this file empty? (-r $req_params{SCRIPT_FILENAME}) #can I read this file? ){ pipe(CHILD_RD, PARENT_WR); my $pid = open(KID_TO_READ, "-|"); unless(defined($pid)) { print("Content-type: text/plain\r\n\r\n"); print "Error: CGI app returned no output - Executing $req_params {SCRIPT_FILENAME} failed !\n"; next; } if ($pid >

0) {close (CHILD_RD); print PARENT_WR $stdin_passthrough; close (PARENT_WR); while (my $s =) {print $s;} close KID_TO_READ; waitpid ($pid, 0);} else {foreach $key (keys% req_params) {$ENV {$key} = $req_params {$key};} # cd to the script's local directory if ($req_params {SCRIPT_FILENAME} = ~ / ^ (. *)\ / [^\ /] + $/) {chdir $1;} close (PARENT_WR) Close (STDIN); # fcntl (CHILD_RD, F_DUPFD, 0); syscall (& SYS_dup2, fileno (CHILD_RD), 0); # open (STDIN, "

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