86 lines
2.3 KiB
Perl
86 lines
2.3 KiB
Perl
package Travelynx::Command::munin;
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# Copyright (C) 2020 Daniel Friesel
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#
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# SPDX-License-Identifier: AGPL-3.0-or-later
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use Mojo::Base 'Mojolicious::Command';
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use DateTime;
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has description => 'Generate statistics for munin-node';
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has usage => sub { shift->extract_usage };
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sub query_to_munin {
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my ( $label, $value ) = @_;
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if ( defined $value ) {
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printf( "%s.value %f\n", $label, $value );
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}
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}
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sub run {
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my ( $self, $filename ) = @_;
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my $db = $self->app->pg->db;
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my $now = DateTime->now( time_zone => 'Europe/Berlin' );
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my $active = $now->clone->subtract( months => 1 );
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my $checkin_window_query
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= qq{select count(*) as count from journeys where checkin_time > to_timestamp(?);};
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# DateTime's math does not like time zones: When subtracting 7 days from
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# sun 2am and the previous sunday was the switch from CET to CEST (i.e.,
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# the switch to daylight saving time), the resulting datetime is invalid.
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# This is a fatal error. We avoid this edge case by performing date math
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# on the epoch timestamp, which does not know or care about time zones and
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# daylight saving time.
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my $one_day = 24 * 60 * 60;
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my $one_week = 7 * $one_day;
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my $one_month = 30 * $one_day;
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query_to_munin( 'reg_user_count',
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$db->select( 'users', 'count(*) as count', { status => 1 } )
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->hash->{count} );
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query_to_munin(
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'active_user_count',
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$db->select(
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'users',
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'count(*) as count',
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{
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status => 1,
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last_seen => { '>', $active }
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}
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)->hash->{count}
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);
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query_to_munin( 'checked_in',
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$db->select( 'in_transit', 'count(*) as count' )->hash->{count} );
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query_to_munin( 'checkins_24h',
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$db->query( $checkin_window_query, $now->epoch - $one_day )
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->hash->{count} );
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query_to_munin( 'checkins_7d',
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$db->query( $checkin_window_query, $now->epoch - $one_week )
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->hash->{count} );
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query_to_munin( 'checkins_30d',
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$db->query( $checkin_window_query, $now->epoch - $one_month )
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->hash->{count} );
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query_to_munin( 'polylines',
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$db->select( 'polylines', 'count(*) as count' )->hash->{count} );
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query_to_munin(
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'polyline_ratio',
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$db->query(
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'select (select count(polyline_id) from journeys)::float / (select count(*) from polylines) as ratio'
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)->hash->{ratio}
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);
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}
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1;
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__END__
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=head1 SYNOPSIS
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Usage: index.pl munin
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Write statistics for munin-node to stdout
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