/ 
Unicorn-Manager-v0.4.1
River stage zero No dependents
/ Unicorn::Manager

NAME

Unicorn::Manager - A Perl interface to the Unicorn webserver

WARNING

This is an unstable development release not ready for production!

VERSION

Version 0.04.01

SYNOPSIS

The Unicorn::Manager module aimes to provide methods to start, stop and gracefully restart the server. You can add and remove workers on the fly.

TODO: Unicorn::Manager::Config should provide methods to create config files and offer an OO interface to the config object.

Until now basically only unicorn_rails is supported. This Lib is a quick hack to integrate management of rails apps with rvm and unicorn into perl scripts.

Also some assumption are made about your environment: you use Linux (the module relies on /proc) you use the bash shell your unicorn config is located in your apps root directory every user is running one single application

I will add and improve what is needed though. Requests and patches are welcome.

ATTRIBUTES/CONSTRUCTION

Unicorn::Manager has following attributes:

username

Username of the user that owns the Unicorn process that will be operated on.

The username is a required attribute.

group

Groupname of the Unicorn process. Defaults to the users primary group.

config

A HashRef containing the information to create a Unicorn::Config object. See perldoc Unicon::Config for more information.

DEBUG

Is a Bool type attribute. Defaults to 'false' and prints additional information if set 'true'.

TODO: Needs to be improved.

Contruction

my $unicorn = Unicorn->new(
    username => 'myuser',
    group    => 'mygroup',
);

METHODS

start

$unicorn->start(
    config => '/path/to/my/config',
    args => ['-D', '--host 127.0.0.1'],
);

Parameters are the path to the config file and an optional ArrayRef with additional arguments. These will override the arguments defined in the config file.

This method needs more love and will be rethought and rewritten. Now it assumes the config file is located in the rails apps root directory. It changes into this directory and drops rights to start unicorn.

stop

$unicorn->stop;

Sends SIGQUIT to the unicorn master. This will gracefully shut down the workers and then quit the master.

If graceful stop will not work SIGKILL will be send.

If no master is running nothing will be happening.

restart

my $result = $unicorn->restart( mode => 'hard');

Mode defaults to 'graceful'.

If mode is set 'hard' graceful restart will be tried first and $unicorn->stop plus $unicorn->start if that fails.

returns true on success, false on error.

reload

my $result = $unicorn->reload;

Reloads the users unicorn. Reloads the config file. Code changes are reloaded unless app_preload is set.

Basically a SIGHUP will be send to the unicorn master.

read_config

NOT YET IMPLEMENTED

$unicorn->read_config('/path/to/config');

Reads the configuration from a unicorn config file.

write_config

NOT YET IMPLEMENTED

$unicorn->make_config('/path/to/config');

Writes the configuration into a unicorn config file.

add_worker

my $result = $unicorn->add_worker( num => 3 );

Adds num workers to the users unicorn. num defaults to 1.

remove_worker

my $result = $unicorn->remove_worker( num => 3 );

Removes num workers but maximum of workers count -1. num defaults to 1.

AUTHOR

Mugen Kenichi, <mugen.kenichi at uninets.eu>

BUGS

Report bugs at:

SUPPORT

  • Technical support

    <mugen.kenichi at uninets.eu>