• NAME
• DESCRIPTION
• SYNOPSIS
• EXPORTED FUNCTIONS
  • service($service, $action, [$option])
  • service_provider_for $os => $type;

NAME

Rex::Commands::Service - Manage System Services

DESCRIPTION

With this module you can manage Linux services.

SYNOPSIS

 use Rex::Commands::Service

 service apache2 => "start";

 service apache2 => "stop";

 service apache2 => "restart";

 service apache2 => "status";

 service apache2 => "reload";

 service apache2 => "ensure", "started";

 service apache2 => "ensure", "stopped";

EXPORTED FUNCTIONS

service($service, $action, [$option])

The service function accepts 2 parameters. The first is the service name and the second the action you want to perform.

starting a service

 task "start-service", "server01", sub {
   service apache2 => "start";
 };

stopping a service

 task "stop-service", "server01", sub {
   service apache2 => "stop";
 };

restarting a service

 task "restart-service", "server01", sub {
   service apache2 => "restart";
 };

checking status of a service

 task "status-service", "server01", sub {
   if( service apache2 => "status" ) {
     say "Apache2 is running";
   }
   else {
     say "Apache2 is not running";
   }
 };

reloading a service

 task "reload-service", "server01", sub {
   service apache2 => "reload";
 };

ensure that a service will started at boot time

 task "prepare", sub {
   service "apache2",
     ensure => "started";
 };

ensure that a service will NOT be started.

 task "prepare", sub {
   service "apache2",
     ensure => "stopped";
 };

If you need to define a custom command for start, stop, restart, reload or status you can do this with the corresponding options.

 task "prepare", sub {
   service "apache2",
     ensure  => "started",
     start   => "/usr/local/bin/httpd -f /etc/my/httpd.conf",
     stop    => "killall httpd",
     status  => "ps -efww | grep httpd",
     restart => "killall httpd && /usr/local/bin/httpd -f /etc/my/httpd.conf",
     reload  => "killall httpd && /usr/local/bin/httpd -f /etc/my/httpd.conf";
 };

This function supports the following hooks:

before_${action}

For example: before_start, before_stop, before_restart

This gets executed right before the given service action. All original parameters are passed to it.

after_${action}

For example: after_start, after_stop, after_restart

This gets executed right after the given service action. All original parameters, and any returned results are passed to it.

service_provider_for $os => $type;

To set another service provider as the default, use this function.

 user "root";

 group "db" => "db[01..10]";
 service_provider_for SunOS => "svcadm";

 task "start", group => "db", sub {
    service ssh => "restart";
 };

This example will restart the ssh service via svcadm (but only on SunOS, on other operating systems it will use the default).

                    cpanm Rex
                

                    perl -MCPAN -e shell
                    install Rex