373 lines
15 KiB
Perl
373 lines
15 KiB
Perl
#
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# Copyright 2020 Centreon (http://www.centreon.com/)
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#
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# Centreon is a full-fledged industry-strength solution that meets
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# the needs in IT infrastructure and application monitoring for
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# service performance.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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package snmp_standard::mode::memory;
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use base qw(centreon::plugins::templates::counter);
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use strict;
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use warnings;
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sub custom_usage_output {
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my ($self, %options) = @_;
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my $msg = sprintf("Ram Total: %s %s Used (-buffers/cache): %s %s (%.2f%%) Free: %s %s (%.2f%%)",
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$self->{perfdata}->change_bytes(value => $self->{result_values}->{total_absolute}),
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$self->{perfdata}->change_bytes(value => $self->{result_values}->{used_absolute}),
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$self->{result_values}->{prct_used_absolute},
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$self->{perfdata}->change_bytes(value => $self->{result_values}->{free_absolute}),
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$self->{result_values}->{prct_free_absolute});
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return $msg;
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}
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sub custom_swap_output {
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my ($self, %options) = @_;
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my $msg = sprintf("Swap Total: %s %s Used: %s %s (%.2f%%) Free: %s %s (%.2f%%)",
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$self->{perfdata}->change_bytes(value => $self->{result_values}->{total_absolute}),
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$self->{perfdata}->change_bytes(value => $self->{result_values}->{used_absolute}),
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$self->{result_values}->{prct_used_absolute},
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$self->{perfdata}->change_bytes(value => $self->{result_values}->{free_absolute}),
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$self->{result_values}->{prct_free_absolute}
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);
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return $msg;
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}
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sub set_counters {
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my ($self, %options) = @_;
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$self->{maps_counters_type} = [
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{ name => 'ram', type => 0, skipped_code => { -10 => 1 } },
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{ name => 'swap', type => 0, message_separator => ' - ', skipped_code => { -10 => 1 } },
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];
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$self->{maps_counters}->{ram} = [
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{ label => 'usage', nlabel => 'memory.usage.bytes', set => {
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key_values => [ { name => 'used' }, { name => 'free' }, { name => 'prct_used' }, { name => 'prct_free' }, { name => 'total' } ],
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closure_custom_output => $self->can('custom_usage_output'),
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perfdatas => [
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{ label => 'used', value => 'used_absolute', template => '%d', min => 0, max => 'total_absolute',
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unit => 'B', cast_int => 1 },
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],
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}
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},
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{ label => 'usage-free', display_ok => 0, nlabel => 'memory.free.bytes', set => {
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key_values => [ { name => 'free' }, { name => 'used' }, { name => 'prct_used' }, { name => 'prct_free' }, { name => 'total' } ],
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closure_custom_output => $self->can('custom_usage_output'),
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perfdatas => [
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{ label => 'free', value => 'free_absolute', template => '%d', min => 0, max => 'total_absolute',
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unit => 'B', cast_int => 1 },
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],
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}
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},
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{ label => 'usage-prct', display_ok => 0, nlabel => 'memory.usage.percentage', set => {
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key_values => [ { name => 'prct_used' } ],
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output_template => 'Ram Used : %.2f %%',
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perfdatas => [
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{ label => 'used_prct', value => 'prct_used_absolute', template => '%.2f', min => 0, max => 100,
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unit => '%' },
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],
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}
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},
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{ label => 'buffer', nlabel => 'memory.buffer.bytes', set => {
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key_values => [ { name => 'memBuffer' } ],
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output_template => 'Buffer: %s %s',
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output_change_bytes => 1,
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perfdatas => [
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{ label => 'buffer', value => 'memBuffer_absolute', template => '%d',
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min => 0, unit => 'B' },
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],
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}
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},
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{ label => 'cached', nlabel => 'memory.cached.bytes', set => {
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key_values => [ { name => 'memCached' } ],
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output_template => 'Cached: %s %s',
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output_change_bytes => 1,
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perfdatas => [
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{ label => 'cached', value => 'memCached_absolute', template => '%d',
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min => 0, unit => 'B' },
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],
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}
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},
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{ label => 'shared', nlabel => 'memory.shared.bytes', set => {
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key_values => [ { name => 'memShared' } ],
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output_template => 'Shared: %s %s',
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output_change_bytes => 1,
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perfdatas => [
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{ label => 'shared', value => 'memShared_absolute', template => '%d',
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min => 0, unit => 'B' },
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],
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}
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},
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];
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$self->{maps_counters}->{swap} = [
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{ label => 'swap', nlabel => 'swap.usage.bytes', set => {
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key_values => [ { name => 'used' }, { name => 'free' }, { name => 'prct_used' }, { name => 'prct_free' }, { name => 'total' } ],
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closure_custom_output => $self->can('custom_swap_output'),
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perfdatas => [
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{ label => 'swap', value => 'used_absolute', template => '%d', min => 0, max => 'total_absolute',
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unit => 'B', cast_int => 1 },
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],
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}
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},
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{ label => 'swap-free', display_ok => 0, nlabel => 'swap.free.bytes', set => {
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key_values => [ { name => 'free' }, { name => 'used' }, { name => 'prct_used' }, { name => 'prct_free' }, { name => 'total' } ],
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closure_custom_output => $self->can('custom_swap_output'),
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perfdatas => [
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{ label => 'swap_free', value => 'free_absolute', template => '%d', min => 0, max => 'total_absolute',
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unit => 'B', cast_int => 1 },
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],
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}
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},
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{ label => 'swap-prct', display_ok => 0, nlabel => 'swap.usage.percentage', set => {
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key_values => [ { name => 'prct_used' } ],
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output_template => 'Swap Used : %.2f %%',
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perfdatas => [
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{ label => 'swap_prct', value => 'prct_used_absolute', template => '%.2f', min => 0, max => 100,
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unit => '%' },
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],
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}
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},
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];
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}
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sub new {
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my ($class, %options) = @_;
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my $self = $class->SUPER::new(package => __PACKAGE__, %options);
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bless $self, $class;
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$options{options}->add_options(arguments => {
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'units:s' => { name => 'units', default => '%' },
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'free' => { name => 'free' },
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'swap' => { name => 'check_swap' },
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'redhat' => { name => 'redhat' },
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'autodetect-redhat' => { name => 'autodetect_redhat' },
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});
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return $self;
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}
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sub check_options {
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my ($self, %options) = @_;
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# Compatibility
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$self->compat_threshold_counter(%options,
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compat => {
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th => [ ['usage', { free => 'usage-free', prct => 'usage-prct'} ], [ 'memory-usage-bytes', { free => 'memory-free-bytes', prct => 'memory-usage-percentage' } ] ],
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units => $options{option_results}->{units}, free => $options{option_results}->{free}
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}
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);
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$self->compat_threshold_counter(%options,
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compat => {
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th => [ ['swap', { free => 'swap-free', prct => 'swap-prct' } ], [ 'swap-usage-bytes', { free => 'swap-free-bytes', prct => 'swap-usage-percentage' } ] ],
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units => $options{option_results}->{units}, free => $options{option_results}->{free}
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}
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);
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$self->SUPER::check_options(%options);
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}
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my $mapping = {
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sysDescr => { oid => '.1.3.6.1.2.1.1.1' },
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memTotalSwap => { oid => '.1.3.6.1.4.1.2021.4.3' },
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memAvailSwap => { oid => '.1.3.6.1.4.1.2021.4.4' },
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memTotalReal => { oid => '.1.3.6.1.4.1.2021.4.5' },
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memAvailReal => { oid => '.1.3.6.1.4.1.2021.4.6' },
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memTotalFree => { oid => '.1.3.6.1.4.1.2021.4.11' },
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memShared => { oid => '.1.3.6.1.4.1.2021.4.13' },
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memBuffer => { oid => '.1.3.6.1.4.1.2021.4.14' },
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memCached => { oid => '.1.3.6.1.4.1.2021.4.15' },
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};
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sub autodetect_rhel7 {
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my ($self, %options) = @_;
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# https://access.redhat.com/articles/3078#RHEL7
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# rhel 7.6: "Linux dev 3.10.0-957.10.1.el7.x86_64 #1 SMP Mon Mar 18 15:06:45 UTC 2019 x86_64"
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# rhel 7.7: "Linux dev 3.10.0-1062.1.1.el7.x86_64 #1 SMP Fri Sep 13 22:55:44 UTC 2019 x86_64"
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# oracle 7.6: "Linux dev 4.14.35-1844.3.2.el7uek.x86_64 #2 SMP Mon Feb 25 17:43:37 PST 2019 x86_64"
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# oracle 7.7: "Linux dev 4.14.35-1902.6.6.el7uek.x86_64 #2 SMP Tue Oct 8 07:32:21 PDT 2019 x86_64 x86_64 x86_64"
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return if (!defined($options{result}->{sysDescr}));
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if ($options{result}->{sysDescr} =~ /3\.10\.0-(\d+)\..*?el7\./) {
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my $build = $1;
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$self->{option_results}->{redhat} = 1 if ($build >= 1062);
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} elsif ($options{result}->{sysDescr} =~ /4\.14\.35-(\d+)\..*?\.el7uek\./) {
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my $build = $1;
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$self->{option_results}->{redhat} = 1 if ($build >= 1902);
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}
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}
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sub memory_calc {
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my ($self, %options) = @_;
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my $available = ($options{result}->{memAvailReal}) ? $options{result}->{memAvailReal} * 1024 : 0;
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my $total = ($options{result}->{memTotalReal}) ? $options{result}->{memTotalReal} * 1024 : 0;
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my $buffer = ($options{result}->{memBuffer}) ? $options{result}->{memBuffer} * 1024 : 0;
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my $cached = ($options{result}->{memCached}) ? $options{result}->{memCached} * 1024 : 0;
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my ($used, $free, $prct_used, $prct_free) = (0, 0, 0, 0);
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if ($total != 0) {
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#### procps-ng-3.3.10-23
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## Mem:
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## total = MemTotal in /proc/meminfo
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## used = total - free - buffer - cache
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## free = MemFree in /proc/meminfo
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## shared = Shmem in /proc/meminfo
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## buffers = Buffers in /proc/meminfo
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## cache = Cached and Slab in /proc/meminfo
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## available = MemAvailable in /proc/meminfo
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## Swap:
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## total = SwapTotal in /proc/meminfo
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## used = total - free
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## free = SwapFree in /proc/meminfo
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#### net-snmp-5.7.2-38
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## memTotalSwap = SwapTotal in /proc/meminfo
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## memAvailSwap = SwapFree in /proc/meminfo
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## memTotalReal = MemTotal in /proc/meminfo
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## memAvailReal = MemFree in /proc/meminfo
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## memTotalFree = memAvailSwap + memAvailReal
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## memShared = MemShared in /proc/meminfo
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## memBuffer = Buffers in /proc/meminfo
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## memCached = Cached in /proc/meminfo (missing Slab)
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#### procps-ng-3.3.10-26
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## Mem:
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## total = MemTotal in /proc/meminfo
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## used = total - free - buffer - cache
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## free = MemFree in /proc/meminfo
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## shared = Shmem in /proc/meminfo
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## buffers = Buffers in /proc/meminfo
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## cache = Cached and SReclaimable in /proc/meminfo (https://gitlab.com/procps-ng/procps/commit/05d751c4f076a2f0118b914c5e51cfbb4762ad8e)
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## available = MemAvailable in /proc/meminfo
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## Swap:
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## total = SwapTotal in /proc/meminfo
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## used = total - free
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## free = SwapFree in /proc/meminfo
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#### net-snmp-5.7.2-43
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## memTotalSwap = SwapTotal in /proc/meminfo
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## memAvailSwap = SwapFree in /proc/meminfo
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## memTotalReal = MemTotal in /proc/meminfo
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## memAvailReal = MemFree + Buffers + Cached + SReclaimable in /proc/meminfo (https://bugzilla.redhat.com/attachment.cgi?id=1554747&action=diff)
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## memTotalFree = memAvailSwap + memAvailReal
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## memShared = MemShared in /proc/meminfo
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## memBuffer = Buffers in /proc/meminfo
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## memCached = Cached + SReclaimable in /proc/meminfo (https://bugzilla.redhat.com/attachment.cgi?id=1554747&action=diff)
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$used = (defined($self->{option_results}->{redhat})) ? $total - $available : $total - $available - $buffer - $cached;
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$free = (defined($self->{option_results}->{redhat})) ? $available : $total - $used;
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$prct_used = $used * 100 / $total;
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$prct_free = 100 - $prct_used;
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}
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$self->{ram} = {
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total => $total,
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used => $used,
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free => $free,
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prct_used => $prct_used,
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prct_free => $prct_free,
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memShared => ($options{result}->{memShared}) ? $options{result}->{memShared} * 1024 : 0,
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memBuffer => $buffer,
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memCached => $cached,
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};
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}
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sub swap_calc {
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my ($self, %options) = @_;
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my $free = ($options{result}->{memAvailSwap}) ? $options{result}->{memAvailSwap} * 1024 : 0;
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my $total = ($options{result}->{memTotalSwap}) ? $options{result}->{memTotalSwap} * 1024 : 0;
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my ($used, $prct_used, $prct_free) = (0, 0, 0, 0);
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if ($total != 0) {
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$used = $total - $free;
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$prct_used = $used * 100 / $total;
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$prct_free = 100 - $prct_used;
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}
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$self->{swap} = {
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total => $total,
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used => $used,
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free => $free,
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prct_used => $prct_used,
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prct_free => $prct_free,
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};
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}
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sub manage_selection {
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my ($self, %options) = @_;
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my $results = $options{snmp}->get_leef(
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oids => [ map($_->{oid} . '.0', values(%$mapping)) ]
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);
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my $result = $options{snmp}->map_instance(mapping => $mapping, results => $results, instance => 0);
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$self->autodetect_rhel7(result => $result) if (defined($self->{option_results}->{autodetect_redhat}));
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$self->memory_calc(result => $result);
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if (defined($self->{option_results}->{check_swap})) {
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$self->swap_calc(result => $result);
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}
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}
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1;
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__END__
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=head1 MODE
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Check memory usage (UCD-SNMP-MIB).
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=over 8
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=item B<--units>
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Units of thresholds (Default: '%') ('%', 'absolute') (Deprecated. Please use new counters directly)
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=item B<--free>
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Thresholds are on free space left (Deprecated. Please use new counters directly)
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=item B<--swap>
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Check swap also.
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=item B<--warning-*> B<--critical-*>
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Thresholds.
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Can be: 'usage' (B), 'usage-free' (B), 'usage-prct' (%),
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'swap' (B), 'swap-free' (B), 'swap-prct' (%),
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'buffer' (B), 'cached' (B), 'shared' (B).
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=item B<--autodetect-redhat>
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Try to detect autodetect rhel 7.7 version and higher.
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=item B<--redhat>
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If using RedHat distribution with net-snmp >= 5.7.2-43.
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This version: used = memTotalReal - memAvailReal // free = memAvailReal
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Others versions: used = memTotalReal - memAvailReal - memBuffer - memCached // free = total - used
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(grep for '##' in this mode for more informations)
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=back
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=cut
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