start_server - a superdaemon for hot-deploying server programs

       Kazuho Oku

       This script is a frontend of Server::Starter.  For more information please refer to the documentation of
       the module.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl
       itself.

perl v5.36.0                                       2022-12-12                                   START_SERVER(1p)

       start_server - a superdaemon for hot-deploying server programs

--port=(port|host:port|port=fd|host:port=fd)
       TCP port to listen to (if omitted, will not bind to any ports)

       If host is not specified, then the program will bind to the default address of IPv4 ("0.0.0.0").  Square
       brackets should be used to specify an IPv6 address (e.g. --port=[::1]:8080)

       If fd is specified, then start_server allocates the socket at the given number.

       The command binds to UDP ports if the port numbers are prefixed by "u" (e.g., --port=u443).

   --path=path
       path at where to listen using unix socket (optional)

   --dir=path
       working directory, start_server do chdir to before exec (optional)

   --interval=seconds
       minimum interval to respawn the server program (default: 1)

   --signal-on-hup=SIGNAL
       name of the signal to be sent to the server process when start_server receives a SIGHUP (default:
       SIGTERM). If you use this option, be sure to also use "--signal-on-term" below.

   --signal-on-term=SIGNAL
       name of the signal to be sent to the server process when start_server receives a SIGTERM (default:
       SIGTERM)

   --pid-file=filename
       if set, writes the process id of the start_server process to the file

   --status-file=filename
       if set, writes the status of the server process(es) to the file

   --envdir=ENVDIR
       directory that contains environment variables to the server processes and superdaemon.  It is inspired by
       "envdir" in "daemontools".  This can be overwritten by environment variable "ENVDIR".

   --log-file=file--log-file="|cmdargs..."
       if set, redirects STDOUT and STDERR to given file or command

   --daemonize
       deamonizes the server (by doing fork,setsid,fork).  Must be used together with "--log-file".

   --enable-auto-restart
       enables automatic restart by time.  This can be overwritten by environment variable
       "ENABLE_AUTO_RESTART".

   --auto-restart-interval=seconds
       automatic restart interval (default 360). It is used with "--enable-auto-restart" option.  This can be
       overwritten by environment variable "AUTO_RESTART_INTERVAL".

   --kill-old-delay=seconds
       time to suspend to send a signal to the old worker. The default value is 5 when "--enable-auto-restart"
       is set, 0 otherwise.  This can be overwritten by environment variable "KILL_OLD_DELAY".

   --backlog=size
       specifies a listen backlog parameter, whose default is SOMAXCONN (usually 128 on Linux). While SOMAXCONN
       is enough for most loads, large backlog is required for heavy loads.

   --restart
       this is a wrapper command that reads the pid of the start_server process from --pid-file, sends SIGHUP to
       the process and waits until the server(s) of the older generation(s) die by monitoring the contents of
       the --status-file

   --stop
       this is a wrapper command that reads the pid of the start_server process from --pid-file, sends SIGTERM
       to the process.

   --help
       prints this help

   --version
       prints the version number

       Server::Starter

         start_server [options] -- server-prog server-arg1 server-arg2 ...

         # start Plack using Starlet listening at TCP port 8000
         start_server --port=8000 -- plackup -s Starlet --max-workers=100 index.psgi