package Ubic::Manual::Intro;

# ABSTRACT: Initial introduction


__END__
=pod

=head1 NAME

Ubic::Manual::Intro - Initial introduction

=head1 VERSION

version 1.44

=head1 DESCRIPTION

Ubic is a polymorphic service manager.

It can run any program as a service and provides frontend script C<ubic> to manage services.

C<Polymorphic> means that ubic can use various pluggable backends for managing services, for configuring services and even for describing a list of all services.
Don't panic, it offers easy-to-use default solutions for the common tasks out-of-the-box too!

Ubic includes a centralized watchdog process which checks every service periodically and brings them back online if necessary.

=head1 INSTALLATION

Installing ubic is easy.

First, install the module using your favorite CPAN client:

    cpanm Ubic

Second, invoke ubic-admin script to perform initial configuration:

    ubic-admin setup

If you don't want to answer too many questions, you can invoke it with batch-mode option:

    ubic-admin setup --batch-mode

Alternatively, if you're using Debian or Ubuntu, you can install ubic .deb package from the official launchpad PPA repository:

    apt-add-repository ppa:berekuk/ubic
    apt-get update
    apt-get install ubic

=head1 WRITE YOUR FIRST SERVICE

Put this code in your service dir, i.e. in the file I</etc/ubic/service/example> (or if you opted for a home-dir installation, in the I<~/ubic/service/example>):

    use Ubic::Service::SimpleDaemon;
    Ubic::Service::SimpleDaemon->new(
        bin => 'sleep 1000',
    );

Start it:

    $ ubic start example
    Starting example... started (pid 41209)

Check its status:

    $ ubic status
    example running (pid 41209)
    ubic
        ubic.ping   off
        ubic.update off
        ubic.watchdog   running (pid 93226)

Or:

    $ ubic status example
    example running (pid 41209)

Now let's see how the watchdog works by killing the process (replace the pid value with the pid you got from the status command above):

    $ kill 41209

    $ ubic status example
    example not running

    $ ubic-watchdog
    [Thu May 26 20:20:54 2011]  example is broken, restarting

You don't have to run C<ubic-watchdog> manually; it will do its work in background in a minute.

=head1 SEE ALSO

L<Ubic::Service::SimpleDaemon> allows you to tune other service aspects other than I<bin>. Check it out.

L<< Series of blog posts written as tutorials|http://blogs.perl.org/mt/mt-search.fcgi?blog_id=310&tag=tutorial&limit=20 >>

Now go and read L<Ubic::Manual::Overview>, it explains everything else that ubic has to offer.

=head1 AUTHOR

Vyacheslav Matyukhin <mmcleric@yandex-team.ru>

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2012 by Yandex LLC.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.

=cut

