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START_SERVER(1) User Contributed Perl Documentation START_SERVER(1)

start_server - a superdaemon for hot-deploying server programs

  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

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

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.

path at where to listen using unix socket (optional)

working directory, start_server do chdir to before exec (optional)

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

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.

name of the signal to be sent to the server process when start_server receives a SIGTERM (default: SIGTERM)

if set, writes the process id of the start_server process to the file

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

directory that contains environment variables to the server processes. It is intended for use with "envdir" in "daemontools". This can be overwritten by environment variable "ENVDIR".

if set, redirects STDOUT and STDERR to given file or command

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

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

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

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".

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.

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

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

prints this help

prints the version number

Kazuho Oku

Server::Starter

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
2022-04-07 perl v5.32.1

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