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#!/usr/bin/perl ## # Copyright (c) 2018 Red Hat, Inc. # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301, USA. # # monitor_check_vdostats_logicalSpace.pl [--warning <warn_pct>|-w <warn_pct>] # [--critical <crit_pct>|-c <crit_pct>] # <deviceName> # # This script parses the output of "vdostats --verbose" for a given VDO # volume, processes the "used percent" value, and returns a status code, # and a single-line output with status information. # # Options: # # -c <warn_pct>: critical threshold equal to or greater than # <warn_pct> percent. # # -w <crit_pct>: warning threshold equal to or greater than # <crit_pct> percent. # # The "vdostats" program must be in the path used by "sudo". # # $Id: //eng/vdo-releases/magnesium/src/tools/monitor/monitor_check_vdostats_logicalSpace.pl#1 $ # ## use strict; use warnings FATAL => qw(all); use Getopt::Long; # Constants for the service status return values. use constant { MONITOR_SERVICE_OK => 0, MONITOR_SERVICE_WARNING => 1, MONITOR_SERVICE_CRITICAL => 2, MONITOR_SERVICE_UNKNOWN => 3, }; my $inputWarnThreshold = -1; my $inputCritThreshold = -1; GetOptions("critical=i" => \$inputCritThreshold, "warning=i" => \$inputWarnThreshold); # Default warning and critical thresholds for "logical used percent". my $warnThreshold = 80; my $critThreshold = 95; if ($inputWarnThreshold >= 0 && $inputWarnThreshold <= 100) { $warnThreshold = $inputWarnThreshold; } if ($inputCritThreshold >= 0 && $inputCritThreshold <= 100) { $critThreshold = $inputCritThreshold; } # A hash to hold the statistics names and values gathered from input. my %stats = (); # Vital statistics for general VDO health. This array contains only the # names of the desired statistics to store in the %stats hash. my @statNames = ( 'operating mode', 'data blocks used', 'overhead blocks used', 'logical blocks used', 'physical blocks', 'logical blocks', 'used percent', 'saving percent', '1k-blocks available', ); ############################################################################# # Get the statistics output for the given VDO device name, and filter the # desired stats values. ## sub getStats { if (!$ARGV[0]) { return; } my $deviceName = $ARGV[0]; my @verboseStatsOutput = `sudo vdostats $deviceName --verbose`; foreach my $statLabel (@statNames) { foreach my $inpline (@verboseStatsOutput) { if ($inpline =~ $statLabel) { $inpline =~ /.*: (.*)$/; my $statValue = $1; $stats{$statLabel} = $statValue; } } } } ############################################################################# # main ## if (scalar(@ARGV) != 1) { print("Usage: monitor_check_vdostats_logicalSpace.pl\n"); print(" [--warning |-w VALUE]\n"); print(" [--critical|-c VALUE]\n"); print(" <deviceName>\n"); exit(MONITOR_SERVICE_UNKNOWN); } getStats(); # If the stats table is empty, nothing was found; return unknown status. # Otherwise, print the stats. if (!%stats) { printf("Unable to load vdostats verbose output.\n"); exit(MONITOR_SERVICE_UNKNOWN); } # Calculate logical percent used, and print the value. my $logicalUsedPercent = (100 * $stats{"logical blocks used"} / $stats{"logical blocks"}); printf("logical used: %.2f%%\n", $logicalUsedPercent); # Process the critical and warning thresholds. # If critThreshold is less than warnThreshold, the only used percentage # return codes will be "OK" or "CRITICAL". if ($logicalUsedPercent >= $warnThreshold && $logicalUsedPercent < $critThreshold) { exit(MONITOR_SERVICE_WARNING); } if ($logicalUsedPercent >= $critThreshold) { exit(MONITOR_SERVICE_CRITICAL); } if ($logicalUsedPercent >= 0 && $logicalUsedPercent < $warnThreshold) { exit(MONITOR_SERVICE_OK); } # Default exit condition. exit(MONITOR_SERVICE_UNKNOWN);
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