267 lines
9.8 KiB
Plaintext
267 lines
9.8 KiB
Plaintext
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#!/usr/bin/env perl
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=head1 DESCRIPTION
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This is a SNMP extend for ZFS and FreeBSD for use with LibreNMS.
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For more information, see L<https://docs.librenms.org/#Extensions/Applications/#zfs>.
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=head1 SWITCHES
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=head2 -p
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Pretty print the JSON.
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=head1 SNMPD SETUP EXAMPLES
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extend zfs /etc/snmp/zfs-freebsd
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=cut
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#Copyright (c) 2017, Zane C. Bowers-Hadley
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#All rights reserved.
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#
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#Redistribution and use in source and binary forms, with or without modification,
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#are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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#THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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#ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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#WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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#IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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#INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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#BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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#DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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#LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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#OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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#THE POSSIBILITY OF SUCH DAMAGE.
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# Many thanks to Ben Rockwood, Jason J. Hellenthal, and Martin Matuska
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# for zfs-stats and figuring out the math for all the stats
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use strict;
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use warnings;
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use JSON;
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use Getopt::Std;
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$Getopt::Std::STANDARD_HELP_VERSION = 1;
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sub main::VERSION_MESSAGE {
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print "FreeBSD ZFS stats extend 0.0.0\n";
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}
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sub main::HELP_MESSAGE {
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}
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#this will be dumped to json at the end
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my %tojson;
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#gets the options
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my %opts=();
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getopts('p', \%opts);
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my $sysctls;
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my @to_pull=(
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'kstat.zfs',
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'vfs.zfs',
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);
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my @sysctls_pull = `/sbin/sysctl -q @to_pull`;
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foreach my $stat (@sysctls_pull) {
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chomp( $stat );
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my ( $var, $val ) = split(/:/, $stat, 2);
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$val =~ s/^ //;
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$sysctls->{$var}=$val;
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}
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# does not seem to exist for me, but some of these don't seem to be created till needed
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if ( ! defined( $sysctls->{"kstat.zfs.misc.arcstats.recycle_miss"} ) ) {
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$sysctls->{"kstat.zfs.misc.arcstats.recycle_miss"}=0;
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}
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##
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## ARC misc
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##
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$tojson{deleted}=$sysctls->{"kstat.zfs.misc.arcstats.deleted"};
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$tojson{evict_skip}=$sysctls->{"kstat.zfs.misc.arcstats.evict_skip"};
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$tojson{mutex_skip}=$sysctls->{'kstat.zfs.misc.arcstats.mutex_miss'};
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$tojson{recycle_miss}=$sysctls->{"kstat.zfs.misc.arcstats.recycle_miss"};
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##
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## ARC size
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##
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my $target_size_percent = $sysctls->{"kstat.zfs.misc.arcstats.c"} / $sysctls->{"kstat.zfs.misc.arcstats.c_max"} * 100;
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my $arc_size_percent = $sysctls->{"kstat.zfs.misc.arcstats.size"} / $sysctls->{"kstat.zfs.misc.arcstats.c_max"} * 100;
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my $target_size_adaptive_ratio = $sysctls->{"kstat.zfs.misc.arcstats.c"} / $sysctls->{"kstat.zfs.misc.arcstats.c_max"};
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my $min_size_percent = $sysctls->{"kstat.zfs.misc.arcstats.c_min"} / $sysctls->{"kstat.zfs.misc.arcstats.c_max"} * 100;
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$tojson{arc_size}=$sysctls->{"kstat.zfs.misc.arcstats.size"};
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$tojson{target_size_max}=$sysctls->{"kstat.zfs.misc.arcstats.c_max"};
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$tojson{target_size_min}=$sysctls->{"kstat.zfs.misc.arcstats.c_min"};
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$tojson{target_size}=$sysctls->{"kstat.zfs.misc.arcstats.c"};
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$tojson{target_size_per}=$target_size_percent;
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$tojson{arc_size_per}=$arc_size_percent;
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$tojson{target_size_arat}=$target_size_adaptive_ratio;
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$tojson{min_size_per}=$min_size_percent;
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##
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## ARC size breakdown
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##
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my $mfu_size;
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my $recently_used_percent;
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my $frequently_used_percent;
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if ( $sysctls->{"kstat.zfs.misc.arcstats.size"} >= $sysctls->{"kstat.zfs.misc.arcstats.c"} ){
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$mfu_size = $sysctls->{"kstat.zfs.misc.arcstats.size"} - $sysctls->{"kstat.zfs.misc.arcstats.p"};
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$recently_used_percent = $sysctls->{"kstat.zfs.misc.arcstats.p"} / $sysctls->{"kstat.zfs.misc.arcstats.size"} * 100;
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$frequently_used_percent = $mfu_size / $sysctls->{"kstat.zfs.misc.arcstats.size"} * 100;
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}else{
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$mfu_size = $sysctls->{"kstat.zfs.misc.arcstats.c"} - $sysctls->{"kstat.zfs.misc.arcstats.p"};
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$recently_used_percent = $sysctls->{"kstat.zfs.misc.arcstats.p"} / $sysctls->{"kstat.zfs.misc.arcstats.c"} * 100;
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$frequently_used_percent = $mfu_size / $sysctls->{"kstat.zfs.misc.arcstats.c"} * 100;
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}
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$tojson{mfu_size}=$mfu_size;
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$tojson{p}=$sysctls->{"kstat.zfs.misc.arcstats.p"};
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$tojson{rec_used_per}=$recently_used_percent;
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$tojson{freq_used_per}=$frequently_used_percent;
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##
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## ARC efficiency
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##
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my $arc_hits = $sysctls->{"kstat.zfs.misc.arcstats.hits"};
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my $arc_misses = $sysctls->{"kstat.zfs.misc.arcstats.misses"};
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my $demand_data_hits = $sysctls->{"kstat.zfs.misc.arcstats.demand_data_hits"};
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my $demand_data_misses = $sysctls->{"kstat.zfs.misc.arcstats.demand_data_misses"};
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my $demand_metadata_hits = $sysctls->{"kstat.zfs.misc.arcstats.demand_metadata_hits"};
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my $demand_metadata_misses = $sysctls->{"kstat.zfs.misc.arcstats.demand_metadata_misses"};
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my $mfu_ghost_hits = $sysctls->{"kstat.zfs.misc.arcstats.mfu_ghost_hits"};
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my $mfu_hits = $sysctls->{"kstat.zfs.misc.arcstats.mfu_hits"};
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my $mru_ghost_hits = $sysctls->{"kstat.zfs.misc.arcstats.mru_ghost_hits"};
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my $mru_hits = $sysctls->{"kstat.zfs.misc.arcstats.mru_hits"};
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my $prefetch_data_hits = $sysctls->{"kstat.zfs.misc.arcstats.prefetch_data_hits"};
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my $prefetch_data_misses = $sysctls->{"kstat.zfs.misc.arcstats.prefetch_data_misses"};
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my $prefetch_metadata_hits = $sysctls->{"kstat.zfs.misc.arcstats.prefetch_metadata_hits"};
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my $prefetch_metadata_misses = $sysctls->{"kstat.zfs.misc.arcstats.prefetch_metadata_misses"};
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my $anon_hits = $arc_hits - ($mfu_hits + $mru_hits + $mfu_ghost_hits + $mru_ghost_hits);
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my $arc_accesses_total = $arc_hits + $arc_misses;
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my $demand_data_total = $demand_data_hits + $demand_data_misses;
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my $prefetch_data_total = $prefetch_data_hits + $prefetch_data_misses;
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my $real_hits = $mfu_hits + $mru_hits;
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my $cache_hit_percent = $arc_hits / $arc_accesses_total * 100;
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my $cache_miss_percent = $arc_misses / $arc_accesses_total * 100;
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my $actual_hit_percent = $real_hits / $arc_accesses_total * 100;
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my $data_demand_percent = $demand_data_hits / $demand_data_total * 100;
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my $data_prefetch_percent;
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if ( $prefetch_data_total != 0 ) {
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$data_prefetch_percent = $prefetch_data_hits / $prefetch_data_total * 100;
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}else{
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$data_prefetch_percent = 0;
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}
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my $anon_hits_percent;
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if ( $anon_hits != 0 ) {
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$anon_hits_percent = $anon_hits / $arc_hits * 100;
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}else{
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$anon_hits_percent=0;
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}
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my $mru_percent = $mru_hits / $arc_hits * 100;
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my $mfu_percent = $mfu_hits / $arc_hits * 100;
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my $mru_ghost_percent = $mru_ghost_hits / $arc_hits * 100;
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my $mfu_ghost_percent = $mfu_ghost_hits / $arc_hits * 100;
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my $demand_hits_percent = $demand_data_hits / $arc_hits * 100;
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my $prefetch_hits_percent = $prefetch_data_hits / $arc_hits * 100;
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my $metadata_hits_percent = $demand_metadata_hits / $arc_hits * 100;
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my $prefetch_metadata_hits_percent = $prefetch_metadata_hits / $arc_hits * 100;
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my $demand_misses_percent = $demand_data_misses / $arc_misses * 100;
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my $prefetch_misses_percent = $prefetch_data_misses / $arc_misses * 100;
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my $metadata_misses_percent = $demand_metadata_misses / $arc_misses * 100;
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my $prefetch_metadata_misses_percent = $prefetch_metadata_misses / $arc_misses * 100;
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# ARC misc. efficient stats
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$tojson{arc_hits}=$arc_hits;
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$tojson{arc_misses}=$arc_misses;
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$tojson{demand_data_hits}=$demand_data_hits;
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$tojson{demand_data_misses}=$demand_data_misses;
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$tojson{demand_meta_hits}=$demand_metadata_hits;
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$tojson{demand_meta_misses}=$demand_metadata_misses;
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$tojson{mfu_ghost_hits}=$mfu_ghost_hits;
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$tojson{mfu_hits}=$mfu_hits;
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$tojson{mru_ghost_hits}=$mru_ghost_hits;
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$tojson{mru_hits}=$mru_hits;
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$tojson{pre_data_hits}=$prefetch_data_hits;
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$tojson{pre_data_misses}=$prefetch_data_misses;
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$tojson{pre_meta_hits}=$prefetch_metadata_hits;
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$tojson{pre_meta_misses}=$prefetch_metadata_misses;
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$tojson{anon_hits}=$anon_hits;
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$tojson{arc_accesses_total}=$arc_accesses_total;
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$tojson{demand_data_total}=$demand_data_total;
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$tojson{pre_data_total}=$prefetch_data_total;
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$tojson{real_hits}=$real_hits;
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# ARC efficient percents
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$tojson{cache_hits_per}=$cache_hit_percent;
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$tojson{cache_miss_per}=$cache_miss_percent;
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$tojson{actual_hit_per}=$actual_hit_percent;
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$tojson{data_demand_per}=$data_demand_percent;
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$tojson{data_pre_per}=$data_prefetch_percent;
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$tojson{anon_hits_per}=$anon_hits_percent;
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$tojson{mru_per}=$mru_percent;
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$tojson{mfu_per}=$mfu_percent;
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$tojson{mru_ghost_per}=$mru_ghost_percent;
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$tojson{mfu_ghost_per}=$mfu_ghost_percent;
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$tojson{demand_hits_per}=$demand_hits_percent;
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$tojson{pre_hits_per}=$prefetch_hits_percent;
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$tojson{meta_hits_per}=$metadata_hits_percent;
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$tojson{pre_meta_hits_per}=$prefetch_metadata_hits_percent;
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$tojson{demand_misses_per}=$demand_misses_percent;
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$tojson{pre_misses_per}=$prefetch_misses_percent;
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$tojson{meta_misses_per}=$metadata_misses_percent;
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$tojson{pre_meta_misses_per}=$prefetch_metadata_misses_percent;
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#process each pool and shove them into JSON
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my $zpool_output=`/sbin/zpool list -pH`;
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my @pools=split( /\n/, $zpool_output );
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my $pools_int=0;
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my @toShoveIntoJSON;
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while ( defined( $pools[$pools_int] ) ) {
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my %newPool;
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my $pool=$pools[$pools_int];
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$pool =~ s/\t/,/g;
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$pool =~ s/\,\-\,/\,0\,/g;
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$pool =~ s/\%//g;
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$pool =~ s/\,([0-1\.]*)x\,/,$1,/;
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( $newPool{name}, $newPool{size}, $newPool{alloc}, $newPool{free}, $newPool{expandsz}, $newPool{frag}, $newPool{cap}, $newPool{dedup} )=split(/\,/, $pool);
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push(@toShoveIntoJSON, \%newPool);
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$pools_int++;
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}
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$tojson{pools}=\@toShoveIntoJSON;
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my $j=JSON->new;
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if ( $opts{p} ){
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$j->pretty(1);
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}
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print $j->encode( \%tojson );
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if (! $opts{p} ){
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print "\n";
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}
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exit 0;
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