# NAME Plack::Middleware::ServerStatus::Lite - show server status like Apache's mod\_status # SYNOPSIS use Plack::Builder; builder { enable "Plack::Middleware::ServerStatus::Lite", path => '/server-status', allow => [ '127.0.0.1', '192.168.0.0/16' ], counter_file => '/tmp/counter_file', scoreboard => '/var/run/server'; $app; }; % curl http://server:port/server-status Uptime: 1234567789 Total Accesses: 123 BusyWorkers: 2 IdleWorkers: 3 -- pid status remote_addr host method uri protocol ss 20060 A 127.0.0.1 localhost:10001 GET / HTTP/1.1 1 20061 . 20062 A 127.0.0.1 localhost:10001 GET /server-status HTTP/1.1 0 20063 . 20064 . # JSON format % curl http://server:port/server-status?json {"Uptime":"1332476669","BusyWorkers":"2", "stats":[ {"protocol":null,"remote_addr":null,"pid":"78639", "status":".","method":null,"uri":null,"host":null,"ss":null}, {"protocol":"HTTP/1.1","remote_addr":"127.0.0.1","pid":"78640", "status":"A","method":"GET","uri":"/","host":"localhost:10226","ss":0}, ... ],"IdleWorkers":"3"} # DESCRIPTION Plack::Middleware::ServerStatus::Lite is a middleware that display server status in multiprocess Plack servers such as Starman and Starlet. This middleware changes status only before and after executing the application. so cannot monitor keepalive session and network i/o wait. # CONFIGURATIONS - path path => '/server-status', location that displays server status - allow allow => '127.0.0.1' allow => ['192.168.0.0/16', '10.0.0.0/8'] host based access control of a page of server status. supports IPv6 address. - scoreboard scoreboard => '/path/to/dir' Scoreboard directory, Middleware::ServerStatus::Lite stores processes activity information in - counter\_file counter_file => '/path/to/counter_file' Enable Total Access counter - skip\_ps\_command skip_ps_command => 1 or 0 ServerStatus::Lite executes \`ps command\` to find all worker processes. But in some systems that does not mount "/proc" can not find any processes. IF 'skip\_ps\_command' is true, ServerStatus::Lite does not \`ps\`, and checks only processes that already did process requests. # TOTAL BYTES The largest integer that 32-bit Perl can store without loss of precision is 2\*\*53. So rather than getting all fancy with Math::BigInt, we're just going to be conservative and wrap that around to 0. That's enough to count 1 GB per second for a hundred days. # WHAT DOES "SS" MEAN IN STATUS Seconds since beginning of most recent request # AUTHOR Masahiro Nagano # SEE ALSO Original ServerStatus by cho45 # LICENSE This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.