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rainbows(1)                                                rainbows(1)

NAME

       rainbows - rackup-like command to launch Rainbows!

SYNOPSIS

       rainbows [-c CONFIG_FILE] [-E RACK_ENV] [-D] [RACKUP_FILE]

DESCRIPTION

       A rackup(1)-like command to launch Rack applications using
       Rainbows!.  It is expected to be started in your application
       root (APP_ROOT), but the "working_directory" directive may be
       used in the CONFIG_FILE.

       While Rainbows! takes a myriad of command-line options for
       compatibility with ruby(1) and rackup(1), it is recommended to
       stick to the few command-line options specified in the SYNOPSIS
       and use the CONFIG_FILE as much as possible.

RACKUP FILE

       This defaults to "config.ru" in APP_ROOT.  It should be the
       same file used by rackup(1) and other Rack launchers, it uses
       the Rack::Builder DSL.

       Embedded command-line options are mostly parsed for
       compatibility with rackup(1) but strongly discouraged.

UNICORN OPTIONS

       -c, --config-file CONFIG_FILE
              Path to the Unicorn-specific config file.  The config
              file is implemented as a Ruby DSL, so Ruby code may
              executed.  See the RDoc/ri for the Unicorn::Configurator
              class for the full list of directives available from the
              DSL.

       -D, --daemonize
              Run daemonized in the background.  The process is
              detached from the controlling terminal and stdin is
              redirected to "/dev/null".  Unlike many common UNIX
              daemons, we do not chdir to "/" upon daemonization to
              allow more control over the startup/upgrade process.
              Unless specified in the CONFIG_FILE, stderr and stdout
              will also be redirected to "/dev/null".

       -E, --env RACK_ENV
              Run under the given RACK_ENV.  See the RACK ENVIRONMENT
              section for more details.

       -l, --listen ADDRESS
              Listens on a given ADDRESS.  ADDRESS may be in the form
              of HOST:PORT or PATH, HOST:PORT is taken to mean a TCP
              socket and PATH is meant to be a path to a UNIX domain
              socket.  Defaults to "0.0.0.0:8080" (all addresses on
              TCP port 8080) For production deployments, specifying
              the "listen" directive in CONFIG_FILE is recommended as
              it allows fine-tuning of socket options.

       -N, --no-default-middleware
              Disables loading middleware implied by RACK_ENV.  This
              bypasses the configuration documented in the RACK
              ENVIRONMENT section, but still allows RACK_ENV to be
              used for application/framework-specific purposes.

RACKUP COMPATIBILITY OPTIONS

       -o, --host HOST
              Listen on a TCP socket belonging to HOST, default is
              "0.0.0.0" (all addresses).  If specified multiple times
              on the command-line, only the last-specified value takes
              effect.  This option only exists for compatibility with
              the rackup(1) command, use of "-l"/"--listen" switch is
              recommended instead.

       -p, --port PORT
              Listen on the specified TCP PORT, default is 8080.  If
              specified multiple times on the command-line, only the
              last-specified value takes effect.  This option only
              exists for compatibility with the rackup(1) command, use
              of "-l"/"--listen" switch is recommended instead.

       -s, --server SERVER
              No-op, this exists only for compatibility with
              rackup(1).

RUBY OPTIONS

       -e, --eval LINE
              Evaluate a LINE of Ruby code.  This evaluation happens
              immediately as the command-line is being parsed.

       -d, --debug
              Turn on debug mode, the $DEBUG variable is set to true.

       -w, --warn
              Turn on verbose warnings, the $VERBOSE variable is set
              to true.

       -I, --include PATH
              specify LOAD~P~ATH.PATHwillbeprependedtoLOAD_PATH.  The
              ':' character may be used to delimit multiple
              directories.  This directive may be used more than once.
              Modifications to $LOAD_PATH take place immediately and
              in the order they were specified on the command-line.

       -r, --require LIBRARY
              require a specified LIBRARY before executing the
              application.  The "require" statement will be executed
              immediately and in the order they were specified on the
              command-line.

SIGNALS

       The following UNIX signals may be sent to the master process:

       • HUP - reload config file, app, and gracefully restart all
         workers

       • INT/TERM - quick shutdown, kills all workers immediately

       • QUIT - graceful shutdown, waits for workers to finish their
         current request before finishing.

       • USR1 - reopen all logs owned by the master and all workers
         See Unicorn::Util.reopen_logs for what is considered a log.

       • USR2 - reexecute the running binary.  A separate QUIT should
         be sent to the original process once the child is verified to
         be up and running.

       • WINCH - gracefully stops workers but keep the master running.
         This will only work for daemonized processes.

       • TTIN - increment the number of worker processes by one

       • TTOU - decrement the number of worker processes by one

       See the SIGNALS (https://yhbt.net/rainbows/SIGNALS.html)
       document for full description of all signals used by Rainbows!.

RACK ENVIRONMENT

       Accepted values of RACK_ENV and the middleware they
       automatically load (outside of RACKUP_FILE) are exactly as
       those in rackup(1):

       • development - loads Rack::CommonLogger, Rack::ShowExceptions,
         and Rack::Lint middleware

       • deployment - loads Rack::CommonLogger middleware

       • none - loads no middleware at all, relying entirely on
         RACKUP_FILE

       All unrecognized values for RACK_ENV are assumed to be "none".
       Production deployments are strongly encouraged to use
       "deployment" or "none" for maximum performance.

       Note the Rack::ContentLength and Rack::Chunked middlewares are
       also loaded by "deployment" and "development", but no other
       values of RACK_ENV.  If needed, they must be individually
       specified in the RACKUP_FILE, some frameworks do not require
       them.

SEE ALSO

       • unicorn(1)

       • Rack::Builder ri/RDoc

       • Unicorn::Configurator ri/RDoc

       • Rainbows! RDoc (https://yhbt.net/rainbows/)

       • Rack RDoc (http://rdoc.info/gems/r#/gems/rack/frames)

       • Rackup HowTo (http://wiki.github.com/rack/rack/tutorial-
         rackup-howto)

AUTHORS

       Rainbows! Hackers <rainbows-public@yhbt.net>.

Rainbows! User Manual      December 3, 2009                rainbows(1)

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