healthcheck.sh

#!/bin/sh
GLOBIGNORE="*" # to prevent schedule from becoming wacky

if [ "$1" = "-h" ]; then
  echo "Usage: $(basename "$0") check_name \"schedule\" \"command\" alert_channel1,alert_channel2 \"tag1 tag2\" \"description\" grace"
  echo "Everything after \"command\" is optional. Grace is a number, if specified"
  echo "Example: $(basename "$0") influxdb_is_running \"*  *  *  *  *\" \"influx -execute 'SHOW DATABASES'\" VictorOps \"devops\""
  echo "Please make sure VPC_NAME and HEALTHCHECKS_API_KEY are set before running the script"
  exit 0
fi

check_name="($VPC_NAME) $1"
schedule=$2
command=$3
alert_channels=$4
tags=$5
desc=$6
# grace is optional so we only set json if user specifies it
# in hindsight would've been simpler to use ${1-3600} substitution
# and always pass grace in (3600 is default)
grace=${7+',"grace":'$7}

# we set manual_resume to true to avoid spam if a frequent job we paused keeps on failing
PAYLOAD='{"name": "'$check_name'", "tags": "'$tags'", "desc": "'$desc'"'$grace', "schedule": "'$schedule'", "channels": "'$alert_channels'", "unique": ["name"], "manual_resume": true}'

# Create the check if it does not exist or return existing.
CHECK_DATA=$(curl -s https://healthchecks.io/api/v1/checks/ -H "X-Api-Key: $HEALTHCHECKS_API_KEY" -d "$PAYLOAD" --max-time 10)
ERROR=$(echo "$CHECK_DATA" | jq -r .error)
if [ "$ERROR" != "null" ]; then
  echo "Error: $ERROR" >&2;
fi

URL=$(echo "$CHECK_DATA" | jq -r .ping_url)

# Finally, send a ping:
curl -sSf "$URL"/start --max-time 10 1>/dev/null

eval "$command"
status_code=$?

if [ $status_code -ne 0 ]; then URL=$URL/fail; fi

curl -sSf --retry 3 "$URL" --max-time 10 1>/dev/null

exit $status_code

Approved for open source. This can be considered under MIT license.