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245 lines
9.0 KiB
Bash
Executable File
245 lines
9.0 KiB
Bash
Executable File
#!/bin/bash
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#
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# Plugin to graph response times of the specified websites/URLs.
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#
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# Parameters:
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#
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# config (required)
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# autoconf (optional - used by lrrd-config)
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#
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# Configuration example:
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#
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# [wget_page]
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# timeout 30
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# env.names url1 url2
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# env.timeout 20
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# env.error_value 60
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# env.max 120
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#
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# env.url_url1 http://www1.example.com/path1/page1
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# env.label_url1 Example URL#1
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# env.timeout_url1 10
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# env.warning_url1 5
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# env.critical_url1 8
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#
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# env.url_url2 https://www2.example.com/path2/page2
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# env.label_url2 Example URL#2
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# env.timeout_url2 30
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# env.warning_url2 15
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# env.critical_url2 20
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# env.wget_opts_url2 --no-cache --tries=1 --no-check-certificate
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#
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# URL options:
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#
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# You can define the following options for each specified URL
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# as seen in the above example.
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#
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# - url: the URL to be downloaded with Wget
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# - label: the label assigned to the line of the given in URL in the graph
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# - timeout: the value passed to Wget through the "--timeout" option.
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# - warning: the value for the given URL that stands for the warning level
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# - critical: the value for the given URL that stands for the critical level
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# - max: the maximum value for the given URL (values above this will be
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# discarded)
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# - error_value: the value for the given URL that will be used to mark when
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# Wget returned an error. A zero error_value causes the plugin to ignore
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# Wget's return value.
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# - regex_error_value: the value for the given URL that will be used to mark
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# when a regular expression match failed (either for the HTTP response
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# headers or the body).
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# - regex_header_<n>: a regular expression that the HTTP response header must
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# match or the plugin will return regex_error_value for the given URL.
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# By default the plugin uses egrep, thus extended regexps are expected.
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# You can define any number of regexps, but you've to start the index at
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# "1" and increase it sequentially.
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# I.e. regex_header_1, regex_header_2, ...
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# - regex_body_<n>: same as regex_header_<n>, but matches the HTTP response
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# body.
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# - grep_opts: various options supplied to grep for regexp matches for the
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# given URL. By default these are: -E (use of extended regexps)
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# and -i (case insensitive regexp matching)
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# - wget_opts: various options supplied to the Wget command for the given URL.
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# - join_lines: if "true" and regexp matching is applied, the HTTP response body
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# is stripped of newline ("\n") characters. This helps with complex regexps
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# since grep can match only in a single line at a time and it would not be
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# possible to match on complex HTML/XML structures otherwise.
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# This is enabled by default.
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#
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# $Log$
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#
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# Revision 1.0 2006/07/11 08:49:43 cipixul@gmail.com
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# Initial version
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#
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# Revision 2.0 2010/03/25 13:46:13 muzso@muzso.hu
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# Rewrote most of the code. Added multips-like options.
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#
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# Revision 2.1 2010/04/22 11:43:53 muzso@muzso.hu
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# Added regular expression matching against the contents of the checked URL.
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#
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# Revision 2.2 2010/04/23 15:21:12 muzso@muzso.hu
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# Bugfix. Regexp matching on HTTP response bodies with a trailing newline
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# was flawed.
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#
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#%# family=auto
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#%# capabilities=autoconf
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[ -n "${wget_bin}" ] || wget_bin=$(which wget)
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[ -n "${time_bin}" ] || time_bin=$(which time)
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[ -n "${mktemp_bin}" ] || mktemp_bin=$(which mktemp)
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[ -n "${grep_bin}" ] || grep_bin=$(which grep)
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[ -n "${tail_bin}" ] || tail_bin=$(which tail)
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default_error_value=30
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default_regex_error_value=40
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default_grep_opts="-E -i"
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default_wget_opts="--no-cache --tries=1"
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default_timeout=20
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default_join_lines=true
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if [ "${1}" = "autoconf" ]; then
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if [ -z "$wget_bin" ] || [ ! -f "$wget_bin" ] || [ ! -x "$wget_bin" ]; then
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echo "no (missing 'wget' executable)"
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elif [ -z "$time_bin" ] || [ ! -f "$time_bin" ] || [ ! -x "$time_bin" ]; then
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echo "no (missing 'time' executable)"
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elif [ -z "$mktemp_bin" ] || [ ! -f "$mktemp_bin" ] || [ ! -x "$mktemp_bin" ]; then
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echo "no (missing 'mktemp' executable)"
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elif [ -z "$grep_bin" ] || [ ! -f "$grep_bin" ] || [ ! -x "$grep_bin" ]; then
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echo "no (missing 'grep' executable)"
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elif [ -z "$tail_bin" ] || [ ! -f "$tail_bin" ] || [ ! -x "$tail_bin" ]; then
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echo "no (missing 'tail' executable)"
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else
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echo "yes"
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fi
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exit 0
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fi
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if [ -z "${names}" ]; then
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echo "Configuration required"
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exit 1
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fi
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[ -n "${error_value}" ] || error_value=${default_error_value}
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[ -n "${regex_error_value}" ] || regex_error_value=${default_regex_error_value}
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[ -n "${grep_opts}" ] || grep_opts=${default_grep_opts}
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[ -n "${wget_opts}" ] || wget_opts=${default_wget_opts}
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[ -n "${timeout}" ] || timeout=${default_timeout}
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[ -n "${join_lines}" ] || join_lines=${default_join_lines}
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[ -n "${warning}" ] || warning=$((timeout/2))
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[ -n "${critical}" ] || critical=${timeout}
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[ -n "${max}" ] || max=$((timeout*2))
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if [ "${1}" = "config" ]; then
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echo "graph_title wget loadtime of webpages"
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echo "graph_args --base 1000 -l 0"
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echo "graph_scale no"
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echo "graph_vlabel Load time in seconds"
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echo "graph_category webserver"
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echo "graph_info This graph shows load time in seconds of one or more urls"
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I=1
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for name in ${names}; do
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eval iurl='${url_'${name}'}'
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if [ -n "${iurl}" ]; then
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eval ilabel='${label_'${name}':-url${I}}'
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eval iwarning='${warning_'${name}':-${warning}}'
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eval icritical='${critical_'${name}':-${critical}}'
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eval imax='${max_'${name}':-${max}}'
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cat << EOH
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loadtime${I}.label ${ilabel}
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loadtime${I}.info Load time for ${iurl}
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loadtime${I}.min 0
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loadtime${I}.max ${imax}
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EOH
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[ ${iwarning} -gt 0 ] && echo "loadtime${I}.warning ${iwarning}"
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[ ${icritical} -gt 0 ] && echo "loadtime${I}.critical ${icritical}"
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I=$((I+1))
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fi
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done
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exit 0
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fi
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I=1
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for name in ${names}; do
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eval iurl='${url_'${name}'}'
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if [ -n "${iurl}" ]; then
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eval ierror_value='${error_value_'${name}':-${error_value}}'
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eval iregex_error_value='${regex_error_value_'${name}':-${regex_error_value}}'
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eval igrep_opts='${grep_opts_'${name}':-${grep_opts}}'
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eval iwget_opts='${wget_opts_'${name}':-${wget_opts}}'
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eval iwget_post_data='${wget_post_data_'${name}':-${wget_post_data}}'
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eval ijoin_lines='${join_lines_'${name}':-${join_lines}}'
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eval itimeout='${timeout_'${name}':-${timeout}}'
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loadtime=""
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tempfile=$(mktemp)
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if [ -z "${iwget_post_data}" ]; then
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timing=$(${time_bin} -p ${wget_bin} --save-headers --no-directories --output-document "${tempfile}" --timeout ${itimeout} ${iwget_opts} "${iurl}" 2>&1)
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else
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timing=$(${time_bin} -p ${wget_bin} --post-data "${iwget_post_data}" --save-headers --no-directories --output-document "${tempfile}" --timeout ${itimeout} ${iwget_opts} "${iurl}" 2>&1)
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fi
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wget_result=$?
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if [ -f "${tempfile}" ]; then
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if [ ${wget_result} -ne 0 -a ${ierror_value} -gt 0 ]; then
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loadtime=${ierror_value}
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else
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tempheader=""
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tempbody=""
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K=0
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while [ -z "${loadtime}" ]; do
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K=$((K+1))
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eval iregex_header='${regex_header_'${K}'_'${name}':-${regex_header_'${K}'}}'
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eval iregex_body='${regex_body_'${K}'_'${name}':-${regex_body_'${K}'}}'
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[ -z "${iregex_header}" -a -z "${iregex_body}" ] && break
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if [ ${K} -eq 1 ]; then
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OIFS="${IFS}"
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# we skip carrige return characters from the end of header lines
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IFS=$(echo -en "\r")
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inheader=0
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# The "read" command reads only lines terminated by a specific
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# character (which by default the newline char).
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# To read the end of the file (the bytes after the last newline) too
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# we append a newline.
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echo "" >> "${tempfile}"
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while read -r line; do
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if [ -z "${line}" ]; then
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inheader=1
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# We reached the border of the header and the body.
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# Setting IFS to an empty string puts the entire read lines from
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# the body into our "line" variable.
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IFS=""
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else
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if [ ${inheader} -eq 0 ]; then
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tempheader="${tempheader}${line}
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"
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else
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if [ "${ijoin_lines}" = "true" ]; then
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tempbody="${tempbody}${line}"
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else
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tempbody="${tempbody}${line}
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"
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fi
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fi
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fi
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done < "${tempfile}"
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IFS="${OIFS}"
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fi
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if [ -n "${iregex_header}" ] && ! echo "${tempheader}" | ${grep_bin} -qs ${igrep_opts} "${iregex_header}" 2> /dev/null; then
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loadtime=${iregex_error_value}
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else
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if [ -n "${iregex_body}" ] && ! echo "${tempbody}" | ${grep_bin} -qs ${igrep_opts} "${iregex_body}" 2> /dev/null; then
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loadtime=${iregex_error_value}
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fi
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fi
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done
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if [ -z "${loadtime}" ]; then
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loadtime=$(echo "${timing}" | grep "^real *[0-9]" | cut -d ' ' -f 2)
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fi
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fi
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rm -f "${tempfile}" > /dev/null 2>&1
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else
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loadtime=$((ierror_value*2))
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fi
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echo "loadtime${I}.value ${loadtime}"
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I=$((I+1))
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fi
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done
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