bash-logsearch-tool/log-search

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#!/bin/bash
##################################################################################################
# log_search #
##################################################################################################
# This utility was made to make searching for logs much quicker on both a redbox (journal) & on #
# the logserver (via messages files). #
# #
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##################################################################################################
# Author # #
########## #
# Email: tristan.ancelet@acumera.com #
# Work #: +1 (337) 965-1855 #
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# #
##################################################################################################
# BEGIN: Variables
declare -A CONFIG
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CONFIG[source]="journal"
CONFIG[mode]="all"
CONFIG[regex]="."
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CONFIG[service_search]=0
CONFIG[last_nth_days]=1
CONFIG[hostname]="N/A"
CONFIG[service_filter]="N/A"
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CONFIG[output_file]="N/A"
CONFIG[debug]=0
CONFIG[day_filter]=0
CONFIG[hour_filter]=0
CONFIG[remote_host]="N/A"
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declare -A SEARCH_MODES=(
['CLUSTER']='(crmd|stonith|pengine|lrmd|pacemakerd|corosync|drbd)\['
['ISSUES']='warn|crit|fail|err'
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['ALL']='.'
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)
# END: Variables
# BEGIN: Helper Functions
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log () {
if [[ ${CONFIG[debug]} -eq 1 ]]; then
local MESSAGE=${1:?"$FUNCNAME: No message provided"}
local LEVEL_NUM=${2:-0}
case $LEVEL_NUM in
0) LEVEL=INFO;;
1) LEVEL=WARN;;
2) LEVEL=CRIT;;
*) LEVEL=UNDEF;;
esac
echo "$(date) : $LEVEL : ${FUNCNAME[1]} : $MESSAGE"
fi
}
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usage () {
cat <<EOF
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$( basename $0 ) [-s|--source <source>] [-m|--mode <mode>] [--services] [-l|--last-nth-days <int>] [-H|--hostname <hostname>] [-d|--debug] [-o|--output-file <filename>]
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Sources:
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log : When used on the log-server for a customer environment (references the hosts messages file /var/log/hosts/<hostname>/YYYY/MM/DD/messages*)
journal (default) : When used on a node (referenced a nodes journal for finding errors)
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Search Modes
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cluster : Searching for errors that are cluster related (matches regex: ${SEARCH_MODES[CLUSTER]})
issues : General issues that report a warning, failure, error, critical, etc (matches regex: ${SEARCH_MODES[ISSUES]})
custom [custom-regex] : Requires you to provide your own regex as the next argument (make sure to escape your string carefully)
all (default) : Just output all logs provided by your source
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Flags:
Universal:
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--services : Get all the service names that return from the search
-f|--filter-regex <regex> : Will be used to filter only the services you want to
-d|--debug : Turns on debugging
-o|--output-file <filename> : Filename to output to
--remote <hostname> : This will run the gathering code remotely
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Log Source:
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-l|--last-nth-days <int> : (only used with log source) Search for logs in the last nth days.
-H|--hostname <hostname> : Hostname to search against
Journal Source:
--hours : This will narrow down to within the last X hours
--days : This will narrow down to within the last X days
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EOF
}
# END: Helper Functions
# BEGIN: Handle CLI Args
if [[ $# -eq 0 ]]; then
usage
exit
fi
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if grep -E ' (-d|--debug) ' <<< "$@" ; then
CONFIG[debug]=1
log "user set debug mode"
fi
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while [[ $# -ne 0 ]]; do
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log "\$1 is $1"
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case $1 in
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--hours)
if [[ "$2" != "" ]] & [[ $2 -gt 0 ]]; then
if [[ ${CONFIG[day_filter]} -eq 0 ]]; then
CONFIG[hour_filter]=$2
else
echo "$1 cannot be used with --days"
usage
exit
fi
fi
;;
--days)
if [[ "$2" != "" ]] & [[ $2 -gt 0 ]]; then
if [[ ${CONFIG[hour_filter]} -eq 0 ]]; then
CONFIG[day_filter]=$2
else
echo "$1 cannot be used with --hours"
usage
exit
fi
fi
;;
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-s | --source )
if [[ "$2" != "" ]] && [[ "${2,,}" =~ ^(log|journal)$ ]]; then
case ${2,,} in
log) CONFIG[source]="log";;
journal) CONFIG[source]='journal';;
esac
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log "user set the source to ${CONFIG[source]}"
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shift
continue
else
echo "$2 is not a valid option for $1"
usage
exit
fi
;;
-m | --mode)
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if [[ "$2" != "" ]] && [[ "${2,,}" =~ ^(issues|cluster|custom)$ ]]; then
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case ${2,,} in
issues)
CONFIG[mode]="issues"
CONFIG[regex]=${SEARCH_MODES[ISSUES]}
;;
cluster)
CONFIG[mode]='cluster'
CONFIG[regex]=${SEARCH_MODES[CLUSTER]}
;;
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custom )
CONFIG[mode]='custom'
CONFIG[regex]="$3"
;;
all )
CONFIG[mode]='all'
CONFIG[regex]="${SEARCH_MODES[ALL]}"
;;
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esac
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log "user set search mode and regex to ${CONFIG[mode]}, ${CONFIG[regex]}"
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shift
continue
else
echo "$2 is not a valid option for $1"
usage
exit
fi
;;
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-o | --output-file)
if [[ $2 != "" ]]; then
log "user set output file to be ${CONFIG[output_file]}"
CONFIG[output_file]=$2
fi
;;
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--services)
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log "user is searching for service names"
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CONFIG[service_search]=1
;;
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-f | --filter-regex)
if [[ "$2" != "" ]]; then
CONFIG[service_filter]=$2
log "user provided a search term/regex ${CONFIG[service_filter]}"
shift
continue
fi
;;
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-H | --hostname )
if [[ "$2" != "" ]] ; then
LOG_PATH=/var/log/hosts/$2
if [[ -d $LOG_PATH ]]; then
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log "user set hostname to $2"
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CONFIG[hostname]=$2
else
echo "$LOG_PATH does not exist. Either the host doesn't exist or hasn't logged to this server"
usage
exit
fi
fi
;;
esac
shift
done
# END: Handle CLI Args
# BEGIN: Pre-Work Checks
for KEY in ${!CONFIG[@]}; do
if [[ "${CONFIG[$KEY]}" == "" ]]; then
echo "$KEY was not set"
exit
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elif [[ "${CONFIG[$KEY]}" == "N/A" ]]; then
CONFIG[$KEY]=""
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fi
done
case ${CONFIG[mode]} in
log)
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if [[ ${CONFIG[hostname]} == "" ]]; then
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echo "A hostname was not provieded (via -H|--hostname), and it is required to do a log search"
usage
exit
fi
;;
esac
# END: Pre-Work Checks
# BEGIN: Work Functions
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import () {
declare -f gather_logs_from_journal gather_logs_from_files log
CONFIG[remote_host]=""
declare -p CONFIG
}
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gather_logs_from_journal () {
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if [[ ${CONFIG[day_filter]} -gt 0 ]]; then
sudo journalctl --since "${CONFIG[day_filter]} days ago" --no-pager | grep -E ${CONFIG[regex]}
elif [[ ${CONFIG[hour_filter]} -gt 0 ]]; then
sudo journalctl --since "${CONFIG[hour_filter]} hours ago" --no-pager | grep -E ${CONFIG[regex]}
else
sudo journalctl --no-pager | grep -E ${CONFIG[regex]}
fi
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}
gather_logs_from_files () {
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log "User is getting logs from the last ${CONFIG[last_nth_days]} files"
local -a FILES=( $( ls -1r /var/log/hosts/${CONFIG[hostname]}/*/*/*/messages* ) )
log " Files Found:
$(
for FILE in ${FILES[@]}; do
echo "- $FILE"
done
)"
local OUTPUT BUFFER EXT
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local FILE
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for FILE in ${FILES[@]::${CONFIG[last_nth_days]}}; do
log "$FILE being checked"
EXT=$( basename $FILE | cut -d '.' -f 2 )
log "EXT was found to be $EXT"
case $EXT in
bz* ) GREP="bzgrep";;
gz* | zip ) GREP="zgrep";;
* ) GREP="grep";;
esac
log "GREP was set to $GREP"
sudo $GREP -E "${CONFIG[regex]}" $FILE
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done
}
# END: Work Functions
# BEGIN: Work
case ${CONFIG[source]} in
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log) COMMAND=gather_logs_from_files;;
journal) COMMAND=gather_logs_from_journal;;
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esac
if [[ ${CONFIG[service_search]} -eq 1 ]]; then
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$COMMAND | awk '{ print $5 }' | cut -d '[' -f 1 | sort -u | tr -d ':'
elif [[ "${CONFIG[service_filter]}" ]]; then
$COMMAND | grep -E "${CONFIG[service_filter]}"
elif [[ "${CONFIG[output_file]}" ]]; then
log "outputting all searches from user to ${CONFIG[output_file]}"
$COMMAND >${CONFIG[output_file]}
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else
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$COMMAND
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fi
# END: Work