Munin contributed plugins

#!/usr/bin/env perl

=head1 NAME

hhvm_ - Munin plugin to monitor HHVM.

=head1 LICENCE

This source file is subject to the Open Software License (OSL 3.0)

Which is available through the world-wide-web at this URL:

http://opensource.org/licenses/osl-3.0.php

Copyright (c) 2014 Jeroen Vermeulen - http://www.jeroenvermeulen.eu

=head1 USAGE

- You need HHVM 3.0 or greater.

- The HHVM AdminServer needs to be locally accessible via HTTP.

- Since version 3.0 HHVM has no longer a built-in webserver. Not even for the AdminServer.

- You will need to configure a special HHVM Admin webserver like Apache or Nginx, and connect it via FastCGI to the HHVM AdminServer Port. More info below.

- You can use the HHVM Config setting "AdminServer.Port" or ini variable "hhvm.admin_server.port" to choose that port. For example 8080.

- Copy this file to "/usr/share/munin/plugins/hhvm_".

- Create a symlink in "/etc/munin/plugins"

- By default this script will try to connect to a webserver on 127.0.0.1 port 8081.

- You can make it connect to another IP and port by naming the symlink "hhvm_[IP]_[PORT]", for example hhvm_11.22.33.44_8081

- You can also use the plugin config to set "env.host" and "env.port"

=head1 ADMIN WEBSERVER CONFIG

=head2 NGINX CONFIG

server {

    listen              127.0.0.1:8081 default;

    location ~ {

        fastcgi_pass    127.0.0.1:8080;

        include         fastcgi_params;

    }

}

=head2 APACHE 2.2 CONFIG

FastCgiExternalServer /var/run/hhvm_admin.fcgi -host 127.0.0.1:8080

Listen 127.0.0.1:8081               

<VirtualHost 127.0.0.1:8081>

    Alias  /check-health  /var/run/hhvm_admin.fcgi

    Alias  /status.json   /var/run/hhvm_admin.fcgi

    Alias  /              /var/run/hhvm_admin.fcgi

</VirtualHost>

=head2 APACHE 2.4 CONFIG

Listen 127.0.0.1:8081

<VirtualHost 127.0.0.1:8081>

    ProxyPass  /  fcgi://127.0.0.1:8080/

</VirtualHost>

=cut

use warnings;

use strict;

# use lib $ENV{'MUNIN_LIBDIR'};

use Munin::Plugin;

use LWP::Simple;

use JSON::PP;

sub getJson( $ );

my $script = $0;

my $host = '127.0.0.1';

my $port = 8081;

if ( $script =~ /\bhhvm_([a-z0-9\-\.]+)(?:_(\d+))?$/ ) {

    $host = $1;

    if ( $2 ) {

        $port = int( $2 );

    }

}

$host = defined $ENV{'host'} ? $ENV{'host'} : $host;

$port = defined $ENV{'port'} ? $ENV{'port'} : $port;

if ( exists $ARGV[0] && 'config' eq $ARGV[0] ) {

    print <<EOF;

multigraph hhvm_threads

graph_title HHVM Threads ${host}:${port}

graph_args --base 1000

graph_category hhvm

threads.label Threads

load.label Active Workers

queued.label Queued Jobs

multigraph hhvm_sizes

graph_title HHVM Sizes ${host}:${port}

graph_args --base 1024

graph_category hhvm

hhbc-roarena-capac.label HHBC Arena Capacity

tc-hotsize.label TC Hot Size

tc-hotsize.info Translation Cache Hot Size

tc-size.label TC Size

tc-size.info Translation Cache Main Size

tc-profsize.label TC Profiling Size

tc-profsize.info Translation Cache Profiling Size

tc-coldsize.label TC Cold Size

tc-coldsize.info Translation Cache Cold Size

tc-trampolinessize.label TC Trampoline Size

tc-trampolinessize.info Translation Cache Trampoline Size

tc-frozensize.label TC Frozen Size

tc-frozensize.info Translation Cache Frozen Size

rds.label RDS Used Bytes

units.label Loaded Units

funcs.label Functions

EOF

} else {

    my $url = sprintf( 'http://%s:%d', $host, $port );

    my $health = getJson( sprintf( '%s/check-health', $url ) );

    my $status = getJson( sprintf( '%s/status.json', $url ) );

    print "multigraph hhvm_threads\n";

    printf( "threads.value %d\n", int( @{ $status->{'status'}->{'threads'} } ) ); 

    printf( "load.value %d\n", $health->{'load'} );

    printf( "queued.value %d\n", $health->{'queued'} );

    print "\n";

    print "multigraph hhvm_sizes\n";

    printf( "hhbc-roarena-capac.value %d\n", $health->{'hhbc-roarena-capac'} );

    printf( "tc-hotsize.value %d\n", $health->{'tc-hotsize'} );

    printf( "tc-size.value %d\n", $health->{'tc-size'} );

    printf( "tc-profsize.value %d\n", $health->{'tc-profsize'} );

    printf( "tc-coldsize.value %d\n", $health->{'tc-coldsize'} );

    printf( "tc-trampolinessize.value %d\n", $health->{'tc-trampolinessize'} );

    printf( "tc-frozensize.value %d\n", $health->{'tc-frozensize'} );

    printf( "rds.value %d\n", $health->{'rds'} );

    printf( "units.value %d\n", $health->{'units'} );

    printf( "funcs.value %d\n", $health->{'funcs'} );

}

exit 0;

sub getJson( $ ) {

    my ( $url ) = @_;

    my $json = get( $url );

    if ( ! $json ) {

        die( sprintf( "Could not get json from '%s'.", $url ) );

    }

    my $data = decode_json( $json );

    if ( ! $data || 'HASH' ne ref($data) ) {

        die( sprintf( "Could not decode json from '%s'.", $url ) );

    }

    return $data;

}