NAME

Janus - A maintenance platform

SYNOPSIS

 use Janus;

 my $janus = Janus->new
 (
     name => 'foobar',
     conf => '/conf/file',
     path => '/path/file',
 );

 $janus->run();

SEQUENCES

The following sequences may be defined. See Janus::Sequence.

alpha

BEGIN sequence.

delta

sequence for each batch of targets.

omega

End sequence.

CONFIGURATION

name

Name of the maintenance event.

conf

See Janus::Conf.

path

See Janus::Path.

METHODS

run()

Launch maintenance. Return 1 on failure, 0 on success.

OBJECTS and BEHAVIORS

lock

Janus creates/obtains an advisory lock under the run directory. See Vulcan::ProcLock.

log

Janus logs to a file under the log directory. A symbolic link to the log file is created under the run directory. See Janus::Log.

ctrl

Subroutines stuck and exclude are created from ctrl. See Janus::Ctrl.

cache

Janus loads cache (HASH) from a YAML file, if any, under the run directory, then unlinks said file. When INT or TERM signal is caught, Janus dumps cache to said file, clears ctrl, and exits.

cpanm pantheon

perl -MCPAN -e shell
install pantheon