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Adds multipathd_metrics.sh
Signed-off-by: Nick Galtry <nick.galtry@mobilise.cloud>
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‎multipathd_metrics.sh‎

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#!/bin/bash
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# Author: Nick Galtry
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# Usage: Script that jq queries against JSON output of multipathd show multipaths command, formats results for Promtheus textfile collector
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# Requires: jq
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set -e
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# Function for handling errors, "scrubs the multipathd.prom file"
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error_trap() {
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local error_msg="$1"
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echo "$error_msg"
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exit 1
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}
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if ! command -v jq &> /dev/null; then
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error_trap "Error: jq is not installed."
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fi
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# Variable set for command to run with jq
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if ! command_output=$(multipathd show multipaths json)
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then
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error_trap "Error: Failed to run multipathd show multipaths"
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fi
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if echo "$command_output" | jq -e '.maps | length == 0' >/dev/null 2>/dev/null; then
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exit 0
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fi
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node_multipath_paths_dm_st=$(echo "$command_output" |
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jq -c -r '.maps[] |
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{
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name: .name,
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uuid: .uuid,
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vend: (.vend | sub("^[[:space:]]+"; "") | sub("[[:space:]]+$"; "")),
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prod: .prod,
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count: [.path_groups[].paths[] | select(.dm_st == "active")] | length
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}' |
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sed -E 's/^/node_multipath_paths_dm_st/;
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s/"name"/name/;
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s/"uuid"/uuid/;
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s/"vend"/vend/;
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s/"prod":"([^"]*)"/prod:"\1",state="active"/;
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s/,"count":([0-9]+)}/\}\1/g;
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s/:/=/g'
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)
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if [ -z "$node_multipath_paths_dm_st" ]; then
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error_trap "Error processing node_multipath_paths_dm_st metric"
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else
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echo "# HELP node_multipath_paths_dm_st A count of paths with active state in path_groups"
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echo "# TYPE node_multipath_paths_dm_st gauge"
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echo "${node_multipath_paths_dm_st}"
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fi
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node_multipath_paths_chk_st=$(echo "$command_output" |
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jq -c -r '.maps[] |
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{
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name: .name,
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uuid: .uuid,
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vend: (.vend | sub("^[[:space:]]+"; "") | sub("[[:space:]]+$"; "")),
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prod: .prod,
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count: [.path_groups[].paths[] | select(.chk_st == "ready")] | length
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}' |
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sed -E 's/^/node_multipath_paths_chk_st/;
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s/"name"/name/;
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s/"uuid"/uuid/;
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s/"vend"/vend/;
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s/"prod":"([^"]*)"/prod:"\1",state="ready"/;
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s/,"count":([0-9]+)}/\}\1/g;
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s/:/=/g'
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)
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if [ -z "$node_multipath_paths_chk_st" ]; then
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error_trap "Error processing node_multipath_paths_chk_st metric"
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else
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echo "# HELP node_multipath_paths_chk_st A count of paths with chk_st ready in path_groups"
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echo "# TYPE node_multipath_paths_chk_st gauge"
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echo "${node_multipath_paths_chk_st}"
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fi
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node_multipath_paths_dev_st=$(echo "$command_output" |
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jq -c -r '.maps[] |
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{
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name: .name,
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uuid: .uuid,
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vend: (.vend | sub("^[[:space:]]+"; "") | sub("[[:space:]]+$"; "")),
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prod: .prod,
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count: [.path_groups[].paths[] | select(.dev_st == "running")] | length
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}' |
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sed -E 's/^/node_multipath_paths_dev_st/;
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s/"name"/name/;
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s/"uuid"/uuid/;
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s/"vend"/vend/;
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s/"prod":"([^"]*)"/prod:"\1",state="running"/;
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s/,"count":([0-9]+)}/\}\1/g;
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s/:/=/g'
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)
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if [ -z "$node_multipath_paths_dev_st" ]; then
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error_trap "Error processing node_multipath_paths_dev_st metric"
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else
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echo "# HELP node_multipath_paths_dev_st A count of paths with dev_st running in path_groups"
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echo "# TYPE node_multipath_paths_dev_st gauge"
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echo "${node_multipath_paths_dev_st}"
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fi
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node_multipath_dm_st=$(echo "$command_output" |
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jq -c -r '.maps[] |
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{
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name: .name,
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uuid: .uuid,
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vend: (.vend | sub("^[[:space:]]+"; "") | sub("[[:space:]]+$"; "")),
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prod: .prod,
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count: [select(.dm_st == "active")] | length
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}' |
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sed -E 's/^/node_multipath_dm_st/;
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s/"name"/name/;
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s/"uuid"/uuid/;
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s/"vend"/vend/;
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s/"prod":"([^"]*)"/prod:"\1",state="active"/;
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s/,"count":([0-9]+)}/\}\1/g;
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s/:/=/g'
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)
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if [ -z "$node_multipath_dm_st" ]; then
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error_trap "Error processing node_multipath_dm_st metric"
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else
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echo "# HELP node_multipath_dm_st A count of active dm_st per multipath device"
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echo "# TYPE node_multipath_dm_st gauge"
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echo "${node_multipath_dm_st}"
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fi
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node_multipath_path_nr=$(echo "$command_output" |
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jq -c -r '.maps[] |
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{
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name: .name,
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uuid: .uuid,
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vend: (.vend | sub("^[[:space:]]+"; "") | sub("[[:space:]]+$"; "")),
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prod: .prod,
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count: .paths
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}' |
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sed -E 's/^/node_multipath_path_nr/;
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s/"name"/name/;
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s/"uuid"/uuid/;
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s/"vend"/vend/;
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s/"prod"/prod/;
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s/,"count":([0-9]+)}/\}\1/g;
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s/:/=/g' |
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sed 's/ "count"://'
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)
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if [ -z "$node_multipath_path_nr" ]; then
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error_trap "Error processing node_multipath_path_nr metric"
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else
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echo "# HELP node_multipath_path_nr A count of paths per multipath device"
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echo "# TYPE node_multipath_path_nr gauge"
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echo "${node_multipath_path_nr}"
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fi
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node_multipath_path_faults=$(echo "$command_output" |
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jq -c -r '.maps[] |
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{
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name: .name,
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uuid: .uuid,
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vend: (.vend | sub("^[[:space:]]+"; "") | sub("[[:space:]]+$"; "")),
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prod: .prod,
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count: .path_faults
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}' |
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sed -E 's/^/node_multipath_path_faults/;
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s/"name"/name/;
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s/"uuid"/uuid/;
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s/"vend"/vend/;
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s/"prod"/prod/;
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s/,"count":([0-9]+)}/\}\1/g;
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s/:/=/g' |
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sed 's/ "count"://'
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)
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if [ -z "$node_multipath_path_faults" ]; then
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error_trap "Error processing node_multipath_path_faults metric"
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else
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echo "# HELP node_multipath_path_faults A count of faults reported per multipath device"
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echo "# TYPE node_multipath_path_faults gauge"
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echo "${node_multipath_path_faults}"
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fi

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