Munin:...ervice(3pm)

🦋 Munin::Node::Service — bestie edition

okay so this is Munin::Node::Service, a Perl module living in the User Contributed Perl Documentation section of the manual pages. it's literally the whole methods related to handling of Munin services situation. if you're running a Munin node and you need it to, like, actually run services and plugins with the right vibes, this is the file. 💖

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✨ SYNOPSIS ✨

the whole thing in four lines, no notes:

my $services = Munin::Node::Service->new(timeout => 30);
$services->prepare_plugin_environment;
if ($services->is_a_runnable_service($file_name)) {
   $services->fork_service($file_name);
}

look at her. she's serving. 🔥

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💅 METHODS 💅

🌸 new

my $services = Munin::Node::Service->new(%args);

this is the constructor, aka the birth of your services object. every single argument is optional — she's low maintenance like that. here's what you can pass in:

• servicedir — the directory that's gonna get searched for services. that's the vibe check zone.
• defuser, defgroup — the default uid and gid that services will run as. and listen: service-specific user and group directives (the ones set by the service configuration files) will override this. the specific always beats the default, periodt.
• timeout — the default timeout for services. if a service takes longer than this to run, it gets killed. 😭 no mercy. service-specific timeouts (as set in the service configuration files) will override this value too, bestie.

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🎀 is_a_runnable_service

my $bool = $services->is_a_runnable_service($file_name);

runs miscellaneous tests on $file_name inside the service directory, trying to establish whether it's actually a runnable service or just, like, some random file with main character energy and nothing to back it up. returns a bool. 🙈

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🌈 list

my @services = $services->list;

returns a list of all the runnable services in the directory. the full roster. the whole squad. ✨

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🧚 prepare_plugin_environment

$services->prepare_plugin_environment(@services);

carries out the various tasks that plugins need done before they get run — loading service configurations, exporting common environment variables, all the little pre-show rituals. gotta get ready before you go on stage, iykyk. 💜

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⭐ export_service_environment

$services->export_service_enviromnent($service);

exports all the environment variables that are specific to service $service. (and yes, the spelling in that line is exactly what's in the source — enviromnent — we don't fix it, we respect it. she's iconic as she is. 🫶)

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👑 change_real_and_effective_user_and_group

$service->change_real_and_effective_user_and_group($service);

changes the current process' effective group and user IDs to the ones specified in the configuration, or to the default user or group otherwise. also changes the real group and user IDs, but only if the operating system supports it. so like, if your OS isn't about that life, only the effective ones get changed.

⚠️ on failure, this causes the process to exit. no fallback, no second chances, no "let me try again bestie". she simply leaves.

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💀 exec_service

$service->exec_service($service, [@arguments]);

replaces the current process with an instance of service $service in $directory, running with the correct environment and privileges. full transformation moment. 🦋

🚨 this function never returns. like, never. and if the service to be run failed the paranoia check, the process will exit(2). that's the whole deal.

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🔥 fork_service

$result = $service->fork_service($service, [$argument]);

identical to exec_service(), except it runs the service in a subprocess instead of replacing everything. so, like, the more polite version. and if the service takes longer than the timeout, it will be terminated. ⏰

returns a hash reference containing (among other things) the service's output and exit value. for the full comprehensive description, see the documentation for run_as_child() in Munin::Node::Service. go read that one too, it's got the lore.

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and that's the whole page, bestie!! 💖✨🎀

this lil manual page was rendered from perl v5.42.3, dated 2026-09-30, and it's the Munin:...ervice(3pm) page from the User Contributed Perl Documentation. slay, go run your services, and remember: prepare the environment before you fork. 😌💅🦋