Revert "Revert "Add a quick little script to check a file's age""
This reverts commit 822c5193b8.
This commit is contained in:
parent
822c5193b8
commit
c7f1097948
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@ -0,0 +1,170 @@
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#! /bin/bash
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#
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# check_file_age
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# Alerts if a file's age is beyond a specific threshold
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# Copyright (C) 2021 Vintage Salt <rehashedsalt@cock.li>
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#
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# Distributed under terms of the MIT license.
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#
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set -e
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# Read-only set-once variables
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declare -r _name="$(basename -- "$0")"
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# Options
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declare -i _optcritthresh
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declare -i _optwarnthresh
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declare -i _opthelp
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declare -i _optverbose
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# Working variables
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declare -a _args
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declare _return
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# Helper functions
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log() {
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# Print a line to the terminal if _optverbose is greater than $2
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# $2 defaults to 0
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# loglevel 0: Daily-use messages
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# loglevel 1: Detailed but not quite debugging
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# loglevel 2: Definitely debugging
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[ -z "$1" ] && return 1
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if (( _optverbose >= ${2:-0} )); then
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printf "%s\\n" "$1"
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fi
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}
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warn() {
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# Print a yellow line to the terminal, respecting _optverbose
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[ -z "$1" ] && return 1
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if (( _optverbose >= ${2:-0} )); then
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if [ -t 1 ]; then
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printf "\\e[33m%s\\e[0m\\n" "$1"
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else
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printf "WARN: %s\\n" "$1"
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fi
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fi
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}
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error() {
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# Print a red line to the terminal, exit if $2 is specified
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[ -z "$1" ] && return 1
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if [ -t 2 ]; then
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printf "\\e[31m%s\\e[0m\\n" "$1" 1>&2
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else
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printf "ERROR: %s\\n" "$1" 1>&2
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fi
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[ -z "$2" ] && return
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exit "${2:-1}"
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}
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has() {
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# Parse out all arguments and try to find them in path
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# If an argument cannot be found, set _return and fail
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for prog in "$@"; do
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if ! command -v "$prog" > /dev/null 2>&1; then
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_return="$prog"
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return 1
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fi
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done
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return 0
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}
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# Core program functions
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checkage() {
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# Check a file's age against the values of _optwarnthres and _optcritthresh
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file="${_args[0]}"
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log "Checking file $file" 1
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# Get some times
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filetimestamp="$(stat -c %Y -- "$file")"
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now="$(date +%s)"
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# Get our age
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age="$(( now - filetimestamp ))"
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log "File is $age seconds old" 1
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# Throw out warns and crits as necessary
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if (( age >= _optcritthresh )); then
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echo "CRITICAL: $file is $age seconds old (max $_optcritthresh)"
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exit 2
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elif (( age >= _optwarnthresh)); then
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echo "WARNING: $file is $age seconds old (max $_optwarnthresh)"
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exit 1
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else
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echo "OK: $file"
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exit 0
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fi
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}
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printhelp() {
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cat << EOF
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Usage: $_name <FILE> [OPTION]...
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A Nagios monitoring plugin for checking a file's age
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Arguments:
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FILE The file to monitor
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Flags:
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-c The maximum age of the file in seconds before a CRITICAL status is
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returned
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-h Print this help text
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-v Print more status messages. Stacks
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-w The maximum age of the file in seconds before a WARNING status is
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returned
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Copyright (c) 2021 rehashedsalt@cock.li
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Licensed under the MIT license
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EOF
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}
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# Main
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main() {
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# Parse out arguments
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while [ -n "$1" ]; do
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# Parse out flags
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while getopts ":c:hvw:" opt; do
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case $opt in
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c)
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_optcritthresh="$OPTARG"
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;;
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h)
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_opthelp=1
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;;
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v)
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_optverbose+=1
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;;
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w)
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_optwarnthresh="$OPTARG"
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;;
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:)
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error "Option requires argument: -$OPTARG" 2
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;;
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*)
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error "Invalid option: -$OPTARG" 2
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;;
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esac
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done
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# Store arguments
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shift $((OPTIND - 1))
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if [ -n "$1" ]; then
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_args+=("$1")
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shift
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fi
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unset OPTIND
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done
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# Early hook for help
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[ -n "$_opthelp" ] && printhelp && exit 0
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# Validate critical options
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if [ -z "${_args[0]}" ]; then
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error "Must specify a file" 50
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fi
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if ! (( _optcritthresh > 0 )) 2>/dev/null; then
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error "Critical threshold must be an integer greater than 0" 50
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fi
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if ! (( _optwarnthresh > 0 )) 2>/dev/null; then
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error "Warning threshold must be an integer greater than 0" 50
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fi
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# Validate core program dependencies
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log "Validating dependencies" 2
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if ! has basename; then
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error "Failed to find program: $_return" 50
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fi
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# Do the do
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checkage
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}
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main "$@"
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@ -0,0 +1,409 @@
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#!/usr/bin/perl -w
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# Heavily based on the script from:
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# check_mem.pl Copyright (C) 2000 Dan Larsson <dl@tyfon.net>
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# heavily modified by
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# Justin Ellison <justin@techadvise.com>
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#
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# The MIT License (MIT)
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# Copyright (c) 2011 justin@techadvise.com
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# Permission is hereby granted, free of charge, to any person obtaining a copy of this
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# software and associated documentation files (the "Software"), to deal in the Software
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# without restriction, including without limitation the rights to use, copy, modify,
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# merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in all copies
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# or substantial portions of the Software.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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# INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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# PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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# FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
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# OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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# Tell Perl what we need to use
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use strict;
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use Getopt::Std;
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#TODO - Convert to Nagios::Plugin
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#TODO - Use an alarm
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# Predefined exit codes for Nagios
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use vars qw($opt_c $opt_f $opt_u $opt_w $opt_C $opt_v $opt_h %exit_codes);
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%exit_codes = ('UNKNOWN' , 3,
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'OK' , 0,
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'WARNING' , 1,
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'CRITICAL', 2,
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);
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# Get our variables, do our checking:
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init();
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# Get the numbers:
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my ($free_memory_kb,$used_memory_kb,$caches_kb,$hugepages_kb) = get_memory_info();
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print "$free_memory_kb Free\n$used_memory_kb Used\n$caches_kb Cache\n" if ($opt_v);
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print "$hugepages_kb Hugepages\n" if ($opt_v and $opt_h);
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if ($opt_C) { #Do we count caches as free?
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$used_memory_kb -= $caches_kb;
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$free_memory_kb += $caches_kb;
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}
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if ($opt_h) {
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$used_memory_kb -= $hugepages_kb;
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}
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print "$used_memory_kb Used (after Hugepages)\n" if ($opt_v);
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# Round to the nearest KB
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$free_memory_kb = sprintf('%.0f',$free_memory_kb);
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$used_memory_kb = sprintf('%.0f',$used_memory_kb);
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$caches_kb = sprintf('%.0f',$caches_kb);
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# Tell Nagios what we came up with
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tell_nagios($used_memory_kb,$free_memory_kb,$caches_kb,$hugepages_kb);
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sub tell_nagios {
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my ($used,$free,$caches,$hugepages) = @_;
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# Calculate Total Memory
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my $total = $free + $used;
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print "$total Total\n" if ($opt_v);
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my $perf_warn;
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my $perf_crit;
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if ( $opt_u ) {
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$perf_warn = int(${total} * $opt_w / 100);
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$perf_crit = int(${total} * $opt_c / 100);
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} else {
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$perf_warn = int(${total} * ( 100 - $opt_w ) / 100);
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$perf_crit = int(${total} * ( 100 - $opt_c ) / 100);
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}
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my $perfdata = "|TOTAL=${total}KB;;;; USED=${used}KB;${perf_warn};${perf_crit};; FREE=${free}KB;;;; CACHES=${caches}KB;;;;";
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$perfdata .= " HUGEPAGES=${hugepages}KB;;;;" if ($opt_h);
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if ($opt_f) {
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my $percent = sprintf "%.1f", ($free / $total * 100);
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if ($percent <= $opt_c) {
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finish("CRITICAL - $percent% ($free kB) free!$perfdata",$exit_codes{'CRITICAL'});
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}
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elsif ($percent <= $opt_w) {
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finish("WARNING - $percent% ($free kB) free!$perfdata",$exit_codes{'WARNING'});
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}
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else {
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finish("OK - $percent% ($free kB) free.$perfdata",$exit_codes{'OK'});
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}
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}
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elsif ($opt_u) {
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my $percent = sprintf "%.1f", ($used / $total * 100);
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if ($percent >= $opt_c) {
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finish("CRITICAL - $percent% ($used kB) used!$perfdata",$exit_codes{'CRITICAL'});
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}
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elsif ($percent >= $opt_w) {
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finish("WARNING - $percent% ($used kB) used!$perfdata",$exit_codes{'WARNING'});
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}
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else {
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finish("OK - $percent% ($used kB) used.$perfdata",$exit_codes{'OK'});
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}
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}
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}
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# Show usage
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sub usage() {
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print "\ncheck_mem.pl v1.0 - Nagios Plugin\n\n";
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print "usage:\n";
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print " check_mem.pl -<f|u> -w <warnlevel> -c <critlevel>\n\n";
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print "options:\n";
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print " -f Check FREE memory\n";
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print " -u Check USED memory\n";
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print " -C Count OS caches as FREE memory\n";
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print " -h Remove hugepages from the total memory count\n";
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print " -w PERCENT Percent free/used when to warn\n";
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print " -c PERCENT Percent free/used when critical\n";
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print "\nCopyright (C) 2000 Dan Larsson <dl\@tyfon.net>\n";
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print "check_mem.pl comes with absolutely NO WARRANTY either implied or explicit\n";
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print "This program is licensed under the terms of the\n";
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print "MIT License (check source code for details)\n";
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exit $exit_codes{'UNKNOWN'};
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}
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sub get_memory_info {
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my $used_memory_kb = 0;
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my $free_memory_kb = 0;
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my $total_memory_kb = 0;
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my $caches_kb = 0;
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my $hugepages_nr = 0;
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my $hugepages_size = 0;
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my $hugepages_kb = 0;
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my $uname;
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if ( -e '/usr/bin/uname') {
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$uname = `/usr/bin/uname -a`;
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}
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elsif ( -e '/bin/uname') {
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$uname = `/bin/uname -a`;
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}
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else {
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die "Unable to find uname in /usr/bin or /bin!\n";
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}
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print "uname returns $uname" if ($opt_v);
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if ( $uname =~ /Linux/ ) {
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my @meminfo = `/bin/cat /proc/meminfo`;
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foreach (@meminfo) {
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chomp;
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if (/^Mem(Total|Free):\s+(\d+) kB/) {
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my $counter_name = $1;
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if ($counter_name eq 'Free') {
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$free_memory_kb = $2;
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}
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elsif ($counter_name eq 'Total') {
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$total_memory_kb = $2;
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}
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}
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elsif (/^(Buffers|Cached|SReclaimable):\s+(\d+) kB/) {
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$caches_kb += $2;
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}
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elsif (/^Shmem:\s+(\d+) kB/) {
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$caches_kb -= $1;
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}
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# These variables will most likely be overwritten once we look into
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# /sys/kernel/mm/hugepages, unless we are running on linux <2.6.27
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# and have to rely on them
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elsif (/^HugePages_Total:\s+(\d+)/) {
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$hugepages_nr = $1;
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}
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elsif (/^Hugepagesize:\s+(\d+) kB/) {
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$hugepages_size = $1;
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}
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}
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$hugepages_kb = $hugepages_nr * $hugepages_size;
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$used_memory_kb = $total_memory_kb - $free_memory_kb;
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# Read hugepages info from the newer sysfs interface if available
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my $hugepages_sysfs_dir = '/sys/kernel/mm/hugepages';
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if ( -d $hugepages_sysfs_dir ) {
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# Reset what we read from /proc/meminfo
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$hugepages_kb = 0;
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opendir(my $dh, $hugepages_sysfs_dir)
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|| die "Can't open $hugepages_sysfs_dir: $!";
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while (my $entry = readdir $dh) {
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if ($entry =~ /^hugepages-(\d+)kB/) {
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$hugepages_size = $1;
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my $hugepages_nr_file = "$hugepages_sysfs_dir/$entry/nr_hugepages";
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open(my $fh, '<', $hugepages_nr_file)
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|| die "Can't open $hugepages_nr_file for reading: $!";
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$hugepages_nr = <$fh>;
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close($fh);
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$hugepages_kb += $hugepages_nr * $hugepages_size;
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}
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}
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closedir($dh);
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}
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}
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elsif ( $uname =~ /HP-UX/ ) {
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# HP-UX, thanks to Christoph Fürstaller
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my @meminfo = `/usr/bin/sudo /usr/local/bin/kmeminfo`;
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foreach (@meminfo) {
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chomp;
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if (/^Physical memory\s\s+=\s+(\d+)\s+(\d+.\d)g/) {
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$total_memory_kb = ($2 * 1024 * 1024);
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}
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elsif (/^Free memory\s\s+=\s+(\d+)\s+(\d+.\d)g/) {
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$free_memory_kb = ($2 * 1024 * 1024);
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}
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}
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$used_memory_kb = $total_memory_kb - $free_memory_kb;
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}
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elsif ( $uname =~ /FreeBSD/ ) {
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# The FreeBSD case. 2013-03-19 www.claudiokuenzler.com
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# free mem = Inactive*Page Size + Cache*Page Size + Free*Page Size
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my $pagesize = `sysctl vm.stats.vm.v_page_size`;
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$pagesize =~ s/[^0-9]//g;
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my $mem_inactive = 0;
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my $mem_cache = 0;
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my $mem_free = 0;
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my $mem_total = 0;
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my $free_memory = 0;
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my @meminfo = `/sbin/sysctl vm.stats.vm`;
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foreach (@meminfo) {
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chomp;
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if (/^vm.stats.vm.v_inactive_count:\s+(\d+)/) {
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$mem_inactive = ($1 * $pagesize);
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}
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elsif (/^vm.stats.vm.v_cache_count:\s+(\d+)/) {
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$mem_cache = ($1 * $pagesize);
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}
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elsif (/^vm.stats.vm.v_free_count:\s+(\d+)/) {
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$mem_free = ($1 * $pagesize);
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}
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elsif (/^vm.stats.vm.v_page_count:\s+(\d+)/) {
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$mem_total = ($1 * $pagesize);
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}
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}
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$free_memory = $mem_inactive + $mem_cache + $mem_free;
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$free_memory_kb = ( $free_memory / 1024);
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$total_memory_kb = ( $mem_total / 1024);
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$used_memory_kb = $total_memory_kb - $free_memory_kb;
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$caches_kb = ($mem_cache / 1024);
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}
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elsif ( $uname =~ /joyent/ ) {
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# The SmartOS case. 2014-01-10 www.claudiokuenzler.com
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# free mem = pagesfree * pagesize
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my $pagesize = `pagesize`;
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my $phys_pages = `kstat -p unix:0:system_pages:pagestotal | awk '{print \$NF}'`;
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my $free_pages = `kstat -p unix:0:system_pages:pagesfree | awk '{print \$NF}'`;
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my $arc_size = `kstat -p zfs:0:arcstats:size | awk '{print \$NF}'`;
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my $arc_size_kb = $arc_size / 1024;
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print "Pagesize is $pagesize" if ($opt_v);
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print "Total pages is $phys_pages" if ($opt_v);
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print "Free pages is $free_pages" if ($opt_v);
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print "Arc size is $arc_size" if ($opt_v);
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$caches_kb += $arc_size_kb;
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$total_memory_kb = $phys_pages * $pagesize / 1024;
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$free_memory_kb = $free_pages * $pagesize / 1024;
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$used_memory_kb = $total_memory_kb - $free_memory_kb;
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}
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elsif ( $uname =~ /SunOS/ ) {
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eval "use Sun::Solaris::Kstat";
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if ($@) { #Kstat not available
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if ($opt_C) {
|
||||
print "You can't report on Solaris caches without Sun::Solaris::Kstat available!\n";
|
||||
exit $exit_codes{UNKNOWN};
|
||||
}
|
||||
my @vmstat = `/usr/bin/vmstat 1 2`;
|
||||
my $line;
|
||||
foreach (@vmstat) {
|
||||
chomp;
|
||||
$line = $_;
|
||||
}
|
||||
$free_memory_kb = (split(/ /,$line))[5] / 1024;
|
||||
my @prtconf = `/usr/sbin/prtconf`;
|
||||
foreach (@prtconf) {
|
||||
if (/^Memory size: (\d+) Megabytes/) {
|
||||
$total_memory_kb = $1 * 1024;
|
||||
}
|
||||
}
|
||||
$used_memory_kb = $total_memory_kb - $free_memory_kb;
|
||||
|
||||
}
|
||||
else { # We have kstat
|
||||
my $kstat = Sun::Solaris::Kstat->new();
|
||||
my $phys_pages = ${kstat}->{unix}->{0}->{system_pages}->{physmem};
|
||||
my $free_pages = ${kstat}->{unix}->{0}->{system_pages}->{freemem};
|
||||
# We probably should account for UFS caching here, but it's unclear
|
||||
# to me how to determine UFS's cache size. There's inode_cache,
|
||||
# and maybe the physmem variable in the system_pages module??
|
||||
# In the real world, it looks to be so small as not to really matter,
|
||||
# so we don't grab it. If someone can give me code that does this,
|
||||
# I'd be glad to put it in.
|
||||
my $arc_size = (exists ${kstat}->{zfs} && ${kstat}->{zfs}->{0}->{arcstats}->{size}) ?
|
||||
${kstat}->{zfs}->{0}->{arcstats}->{size} / 1024
|
||||
: 0;
|
||||
$caches_kb += $arc_size;
|
||||
my $pagesize = `pagesize`;
|
||||
|
||||
$total_memory_kb = $phys_pages * $pagesize / 1024;
|
||||
$free_memory_kb = $free_pages * $pagesize / 1024;
|
||||
$used_memory_kb = $total_memory_kb - $free_memory_kb;
|
||||
}
|
||||
}
|
||||
elsif ( $uname =~ /Darwin/ ) {
|
||||
$total_memory_kb = (split(/ /,`/usr/sbin/sysctl hw.memsize`))[1]/1024;
|
||||
my $pagesize = (split(/ /,`/usr/sbin/sysctl hw.pagesize`))[1];
|
||||
$caches_kb = 0;
|
||||
my @vm_stat = `/usr/bin/vm_stat`;
|
||||
foreach (@vm_stat) {
|
||||
chomp;
|
||||
if (/^(Pages free):\s+(\d+)\.$/) {
|
||||
$free_memory_kb = $2*$pagesize/1024;
|
||||
}
|
||||
# 'caching' concept works different on MACH
|
||||
# this should be a reasonable approximation
|
||||
elsif (/^Pages (inactive|purgable):\s+(\d+).$/) {
|
||||
$caches_kb += $2*$pagesize/1024;
|
||||
}
|
||||
}
|
||||
$used_memory_kb = $total_memory_kb - $free_memory_kb;
|
||||
}
|
||||
elsif ( $uname =~ /AIX/ ) {
|
||||
my @meminfo = `/usr/bin/vmstat -vh`;
|
||||
foreach (@meminfo) {
|
||||
chomp;
|
||||
if (/^\s*([0-9.]+)\s+(.*)/) {
|
||||
my $counter_name = $2;
|
||||
if ($counter_name eq 'memory pages') {
|
||||
$total_memory_kb = $1*4;
|
||||
}
|
||||
if ($counter_name eq 'free pages') {
|
||||
$free_memory_kb = $1*4;
|
||||
}
|
||||
if ($counter_name eq 'file pages') {
|
||||
$caches_kb = $1*4;
|
||||
}
|
||||
if ($counter_name eq 'Number of 4k page frames loaned') {
|
||||
$free_memory_kb += $1*4;
|
||||
}
|
||||
}
|
||||
}
|
||||
$used_memory_kb = $total_memory_kb - $free_memory_kb;
|
||||
}
|
||||
else {
|
||||
if ($opt_C) {
|
||||
print "You can't report on $uname caches!\n";
|
||||
exit $exit_codes{UNKNOWN};
|
||||
}
|
||||
my $command_line = `vmstat | tail -1 | awk '{print \$4,\$5}'`;
|
||||
chomp $command_line;
|
||||
my @memlist = split(/ /, $command_line);
|
||||
|
||||
# Define the calculating scalars
|
||||
$used_memory_kb = $memlist[0]/1024;
|
||||
$free_memory_kb = $memlist[1]/1024;
|
||||
$total_memory_kb = $used_memory_kb + $free_memory_kb;
|
||||
}
|
||||
return ($free_memory_kb,$used_memory_kb,$caches_kb,$hugepages_kb);
|
||||
}
|
||||
|
||||
sub init {
|
||||
# Get the options
|
||||
if ($#ARGV le 0) {
|
||||
&usage;
|
||||
}
|
||||
else {
|
||||
getopts('c:fuChvw:');
|
||||
}
|
||||
|
||||
# Shortcircuit the switches
|
||||
if (!$opt_w or $opt_w == 0 or !$opt_c or $opt_c == 0) {
|
||||
print "*** You must define WARN and CRITICAL levels!\n";
|
||||
&usage;
|
||||
}
|
||||
elsif (!$opt_f and !$opt_u) {
|
||||
print "*** You must select to monitor either USED or FREE memory!\n";
|
||||
&usage;
|
||||
}
|
||||
|
||||
# Check if levels are sane
|
||||
if ($opt_w <= $opt_c and $opt_f) {
|
||||
print "*** WARN level must not be less than CRITICAL when checking FREE memory!\n";
|
||||
&usage;
|
||||
}
|
||||
elsif ($opt_w >= $opt_c and $opt_u) {
|
||||
print "*** WARN level must not be greater than CRITICAL when checking USED memory!\n";
|
||||
&usage;
|
||||
}
|
||||
}
|
||||
|
||||
sub finish {
|
||||
my ($msg,$state) = @_;
|
||||
print "$msg\n";
|
||||
exit $state;
|
||||
}
|
||||
Loading…
Reference in New Issue