#!/usr/bin/env bash
# The three custom indicators, and what happens when the upstream goes down.
set -uo pipefail
cd "$(dirname "$0")/.."
OUT=docs/output/07-custom-health-indicators.txt
B=http://localhost:8080
{
  echo "### profile: details    (show-details: always, show-components: always)"
  echo
  echo "--- upstream UP ---"
  curl -s -o /dev/null -u ops:ops-password -X POST "$B/stub/upstream/mode?value=up"
  sleep 1
  echo "\$ curl -s -o /dev/null -w '%{http_code}' $B/actuator/health"
  curl -s -o /dev/null -w '  HTTP %{http_code}\n' -u ops:ops-password "$B/actuator/health"
  curl -s -u ops:ops-password "$B/actuator/health" | python3 -m json.tool
  echo
  echo "--- flip the upstream to DOWN, change nothing else ---"
  echo "\$ curl -s -X POST '$B/stub/upstream/mode?value=down'"
  curl -s -u ops:ops-password -X POST "$B/stub/upstream/mode?value=down"; echo
  sleep 1
  curl -s -o /dev/null -w '  HTTP %{http_code}\n' -u ops:ops-password "$B/actuator/health"
  curl -s -u ops:ops-password "$B/actuator/health" | python3 -c '
import json,sys
d=json.load(sys.stdin)
print(json.dumps({"status":d["status"],"externalApi":d["components"]["externalApi"]},indent=2))'
  echo
  echo "  The aggregate went DOWN and /actuator/health now answers 503. If that URL is your"
  echo "  Kubernetes readiness probe, every pod in the deployment has just left the load"
  echo "  balancer because a third party had a bad minute."
  echo
  echo "--- a single component, addressed directly ---"
  echo "\$ curl -s $B/actuator/health/ordersDatabase"
  curl -s -u ops:ops-password "$B/actuator/health/ordersDatabase" | python3 -m json.tool
  echo "\$ curl -s $B/actuator/health/kafka"
  curl -s -u ops:ops-password "$B/actuator/health/kafka" | python3 -m json.tool
  echo
  echo "--- restore ---"
  curl -s -u ops:ops-password -X POST "$B/stub/upstream/mode?value=up"; echo
} > "$OUT" 2>&1
echo "wrote $OUT"