Jenkins — алерт когда очередь сборок зависла

#!/usr/bin/env bash
# /etc/cron.d/jenkins-queue
# */5 * * * * root /opt/jenkins-queue.sh

JENKINS=${JENKINS_URL:-http://jenkins:8080}
USER=${JENKINS_USER}
TOKEN=${JENKINS_TOKEN}
THRESH=${THRESH:-5}                   # queued jobs > N
MAX_AGE_MIN=${MAX_AGE_MIN:-15}        # any job stuck > N min

QUEUE=$(curl -fsS -u "$USER:$TOKEN" "$JENKINS/queue/api/json" \
  | jq '.items')

COUNT=$(echo "$QUEUE" | jq 'length')
NOW=$(date -u +%s)

OLD=$(echo "$QUEUE" | jq --argjson now "$NOW" --argjson max "$MAX_AGE_MIN" '
  [.[] | select((($now * 1000 - .inQueueSince) / 60000) > $max)] | length')

if [ "$COUNT" -gt "$THRESH" ] || [ "$OLD" -gt 0 ]; then
  curl -fsS "$HEARTBEAT_URL" --data "queued=$COUNT,old=$OLD,window=${MAX_AGE_MIN}m"
  exit 2
fi
echo "OK (queued=$COUNT, none > ${MAX_AGE_MIN}m)"