custom diego health checi

health.sh

#!/bin/sh
TIMEOUT=${HEALTH_CHECK_TIMEOUT:-30}
URL=${HEALTH_CHECK_URL:-localhost:8091/health}
RESPONSE=$(curl --connect-time $TIMEOUT --max-time $TIMEOUT -qs "$URL")
OUTCOME=$?
set -e 
if [ ${OUTCOME} -eq 7 ]; then
    echo "Failed to connect to ${URL}, cURL returned status ${OUTCOME}. Cheetah may not be started fully yet."
    exit $OUTCOME
fi

if [ ${OUTCOME} -ne 0 ]; then
    echo "Health check on ${URL}, cURL returned ${OUTCOME}\n${RESPONSE}"
    exit $OUTCOME
fi

STATUS=$(echo "${RESPONSE}" | jq -r '.status')
if [ ${STATUS} = "UNHEALTHY" ]; then
    echo "One or more health checks failed\n${RESPONSE}"
    exit 0
elif [ ${STATUS} = "CRASHED" ]; then
    echo "Application crashed\n${RESPONSE}"
    exit 1
else
    # Either booting up or healthy
    exit 0
fi