Merge branch 'feature/gatewaymon' into 'master'

feat(add): gateway monitoring - ostack controlplane networks are reachable

See merge request !4

CHANGELOG.md

@@ -6,13 +6,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.1.0] - 2022-04-26
+### Added
+- Reachability of controlplane gateways
+
 ## [1.0.5] - 2021-10-14
 ### Changed
 - none, simple rebuild
 
 ## [1.0.4] - 2021-07-13
 ### Fixed
-- dockermon id assert corrected, now expects `/docker/` prefix 
+- dockermon id assert corrected, now expects `/docker/` prefix
 
 ## [1.0.3] - 2021-07-12
 ### Fixed

entrypoint.sh

@@ -11,7 +11,7 @@ CMG_MAX_JITTER_DELAY="${CMG_MAX_JITTER_DELAY:-"3"}"
 CMG_OUT_METRICS_DIR="${CMG_OUT_METRICS_DIR:-"${CMG_BASE_DIR}/out-metrics-dir"}"
 CMG_STDOUT_LOG="${CMG_STDOUT_LOG:-"${CMG_BASE_DIR}/custom-metrics-generator.stdout.log"}"
 CMG_STDERR_LOG="${CMG_STDERR_LOG:-"${CMG_BASE_DIR}/custom-metrics-generator.stderr.log"}"
-CMG_EXEC_MODULES="${CMG_EXEC_MODULES:-"smartmon dockermon puppetmon noderolemon"}"
+CMG_EXEC_MODULES="${CMG_EXEC_MODULES:-"smartmon dockermon puppetmon noderolemon gatewaypingmon"}"
 CMG_NODEROLEMON_METRICS_TEXTFILE=${CMG_NODEROLEMON_METRICS_TEXTFILE:-"/etc/node-exporter/node-role.prom"}
 
 # load the library

src/metric-generators/gatewaypingmon.sh

+#!/usr/bin/env bash
+
+# prometheus textfile metrics generator for node-exporter textfile collector
+# Monitors: gateway reachability from host
+# Usage: gatewaypingmon.sh <gw1> <gw2> ...
+
+set -eo pipefail
+
+METRIC_NAME="gatewaypingmon_prefix_gateway_accessible"
+if [ -z "${GATEWAYPINGMON_GATEWAYS}" ] ; then
+  if hostname | grep -qF .stage.; then
+    GATEWAYPINGMON_GATEWAYS=("10.16.113.1" "10.16.104.1" "10.16.127.129" "147.251.62.129")
+  else
+    GATEWAYPINGMON_GATEWAYS=("10.16.100.1" "10.16.108.1" "10.16.61.1" "147.251.62.129")
+  fi
+else
+  if ! declare -p GATEWAYPINGMON_GATEWAYS | grep -qE "declare[ \t]+-a[ \t]+"; then
+    GATEWAYPINGMON_GATEWAYS=(${GATEWAYPINGMON_GATEWAYS})
+  fi
+fi
+GATEWAYPINGMON_PING_ARGS=${GATEWAYPINGMON_PING_ARGS:-"-c 4 -i 0.2"}
+ACCESS_RATIO=()
+CMG_SRC_DIR=$(dirname $(dirname $(readlink -f $0)))
+
+STAGE_NAME="configuration loaded"
+source "${CMG_SRC_DIR}/../custom-metrics-generator.conf.env"
+
+STAGE_NAME="library loaded"
+source "${CMG_SRC_DIR}/lib.sh"
+
+STAGE_NAME="accessibility of mandatory gateways from host tested"
+for gateway in ${GATEWAYPINGMON_GATEWAYS[@]}; do
+  ping_result=$(ping ${GATEWAYPINGMON_PING_ARGS} ${gateway} || echo "0 received, 100% packet loss")
+  packet_loss_percent=$(echo $ping_result | sed -n -e 's/^.*, \(.*\)% packet.*/\1/p')
+  ACCESS_RATIO+=($(echo "scale=2 ; 1 - ${packet_loss_percent} / 100" | bc))
+done
+
+STAGE_NAME="accessibility of gateways is generated"
+printf '# HELP %s: Current network gateway ping access ratio. (1 ~ no loss, 0 ~ complete loss)\n' "${METRIC_NAME}"
+for ((i=0; i<${#GATEWAYPINGMON_GATEWAYS[*]}; i++)); do
+  printf '%s{gateway="%s"} %.2f\n' \
+    "${METRIC_NAME}" "${GATEWAYPINGMON_GATEWAYS[${i}]}" "${ACCESS_RATIO[${i}]}"
+done