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Add multigraph plugin for http response codes and times
In contrast to using http_responsecode and http_loadtime with the same configuration, this plugin performs only one request per site and munin run to gather its statistics.
This commit is contained in:
Klaus Sperner
Lars Kruse
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7046ba801c
commit
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1 changed files with 198 additions and 0 deletions
198
plugins/http/http_response
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198
plugins/http/http_response
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#!/usr/bin/env bash
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# vim: expandtab:ts=4:sw=4
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: << =cut
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=head1 NAME
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http_response - Monitor HTTP response statistics
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=head1 CONFIGURATION
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The following environment variables are used
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sites - Sites to check
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- separated by spaces
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- can contain basic auth credentials
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- defaults to "http://localhost/"
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max_time - Timeout for each site check in seconds
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- defaults to 5 seconds
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short_label - Switch for shortening the label below the graph
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- defaults to false
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=head2 CONFIGURATION EXAMPLE
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[http_response]
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env.sites http://example.com/ https://user:secret@example2.de
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env.max_time 20
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env.short_label true
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=head1 PREREQUISITES
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This plugin needs at least bash version 4 to run
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=head1 NOTES
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This plugin unifies the functionalities of the following plugins into one
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multigraph plugin
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http_loadtime - https://gallery.munin-monitoring.org/plugins/munin/http_loadtime/
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http_responsecode - https://gallery.munin-monitoring.org/plugins/munin-contrib/http_responsecode/
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In contrast to using these two plugins with the same configuration, this plugin
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performs only one request per site and munin run to gather its statistics.
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=head1 AUTHOR
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Copyright (C) 2020 Klaus Sperner
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=head1 LICENSE
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 dated June,
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1991.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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=head1 MAGIC MARKERS
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#%# family=manual
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=cut
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. "$MUNIN_LIBDIR/plugins/plugin.sh"
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readonly uri_regex='^(https?://)([^:]*):(.*)@(.*)$'
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strip_credentials_from_url() {
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if [[ "$1" =~ $uri_regex ]]; then
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echo "${BASH_REMATCH[1]}${BASH_REMATCH[4]}"
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else
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echo "$1"
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fi
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}
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extract_username_from_url() {
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if [[ "$1" =~ $uri_regex ]]; then
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echo "${BASH_REMATCH[2]}"
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else
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echo ""
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fi
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}
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extract_password_from_url() {
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if [[ "$1" =~ $uri_regex ]]; then
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echo "${BASH_REMATCH[3]}"
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else
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echo ""
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fi
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}
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compute_label() {
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if [[ "${short_label,,}" == "true" || "${short_label,,}" == "yes" ]]; then
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if [[ ${#1} -gt 33 ]]; then
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echo "${1:0:30}..."
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else
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echo "$1"
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fi
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else
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echo "$1"
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fi
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}
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if [[ "${BASH_VERSINFO:-0}" -lt 4 ]]; then
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>&2 echo "The plugin http_response needs at least bash version 4"
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exit 1
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fi
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sites=${sites:-"http://localhost/"}
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max_time=${max_time:-5}
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short_label=${short_label:-"false"}
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if [[ "$1" == "config" ]]; then
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echo 'multigraph http_response_code'
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echo 'graph_args --base 1000 -l 0 -u 511'
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echo 'graph_title HTTP Response Codes'
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echo 'graph_vlabel Repsonse Code'
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echo 'graph_category network'
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echo 'graph_info This graph shows HTTP response code statistics'
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echo 'graph_printf %3.0lf'
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for site in $sites; do
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site_without_credentials=$( strip_credentials_from_url "$site" )
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siteid="$( clean_fieldname "$site_without_credentials" )"
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echo "$siteid.label $( compute_label "$site_without_credentials" )"
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echo "$siteid.info HTTP response code statistics for $site_without_credentials"
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echo "$siteid.critical 99:399";
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done
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echo 'multigraph http_response_time'
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echo 'graph_args --base 1000 -l 0'
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echo 'graph_title HTTP Response Times'
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echo 'graph_vlabel Response Time in seconds'
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echo 'graph_category network'
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echo 'graph_info This graph shows HTTP response time statistics'
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for site in $sites; do
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site_without_credentials=$( strip_credentials_from_url "$site" )
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siteid="$( clean_fieldname "$site_without_credentials" )"
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echo "$siteid.label $( compute_label "$site_without_credentials" )"
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echo "$siteid.info HTTP response time statistics for $site_without_credentials"
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done
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exit 0
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fi
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declare -A response_codes
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declare -A response_times
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for site in $sites; do
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site_without_credentials=$( strip_credentials_from_url "$site" )
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username=$( extract_username_from_url "$site" )
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password=$( extract_password_from_url "$site" )
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curl_config_file=""
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curl_auth_opt=()
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if [ -n "$username" ]; then
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if [ -z "$password" ]; then
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>&2 echo "Invalid configuration: username specified without password"
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exit 1
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fi
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curl_config_file=$(mktemp) || exit 1
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trap 'rm -f "$curl_config_file"' EXIT
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echo "user=${username}:${password}" >> "$curl_config_file"
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curl_auth_opt=(--config "$curl_config_file")
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fi
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siteid="$( clean_fieldname "$site_without_credentials" )"
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statuscode=
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loadtime=
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start=$(date +%s.%N)
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statuscode=$( curl "${curl_auth_opt[@]}" --write-out '%{http_code}' --max-time "$max_time" --silent --output /dev/null "$site_without_credentials" )
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returncode=$?
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loadtime=$( echo "$start" "$(date +%s.%N)" | awk '{ print($2 - $1); }' )
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if [[ $returncode -ne 0 ]]; then
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loadtime=0
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fi
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response_codes+=(["$siteid"]="$statuscode")
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response_times+=(["$siteid"]="$loadtime")
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if [ -n "$curl_config_file" ]; then
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rm -f "$curl_config_file"
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fi
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done
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echo 'multigraph http_response_code'
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for siteid in "${!response_codes[@]}"; do
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echo "${siteid}.value ${response_codes[${siteid}]}"
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done
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echo 'multigraph http_response_time'
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for siteid in "${!response_times[@]}"; do
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echo "${siteid}.value ${response_times[${siteid}]}"
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done
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