simple bash script to loop, pinging spinnaker services' health endpoints, until all report healthy

waitForHealthySpinnaker.sh

#!/bin/bash

#####
## Helper script to use when we need to restart/redeploy spinnaker due to config changes or some other reason.
##
## This script has been written for a local debian install of spinnaker (all services running on the same box), but could be adapted fairly easily for a distributed install
##

## Steps:
## - ping health endpoints for all services every 2 seconds, reporting status of each each iteration, until all report healthy
#####

function jsonValue() {
	KEY=$1
	num=$2
	awk -F"[,:}]" '{for(i=1;i<=NF;i++){if($i~/'$KEY'\042/){print $(i+1)}}}' | tr -d '"' | sed -n ${num}p
}

main() {
	services=(
		'gate'
		'clouddriver'
		'fiat'
		'echo'
		'front50'
		'igor'
		'orca'
		'rosco'
	)
	health=(
		'https://localhost:8084/health'
		'http://localhost:7002/health'
		'http://localhost:7003/health'
		'http://localhost:8089/health'
		'http://localhost:8080/health'
		'http://localhost:8088/health'
		'http://localhost:8083/health'
		'http://localhost:8087/health'
	)
	
	unhealthyServices=1
	
	while [  $unhealthyServices -gt 0 ]; do
		unhealthyServices=0
		sleep 4s # wait 4 seconds before trying
		
		for (( i = 0; i < ${#services[@]}; ++i )); do
	    	status=`curl -k -s -X GET ${health[$i]} | jsonValue status 1`
	    	status=`[[ -z "$status" ]] && echo "DOWN" || echo "$status"`
	    	echo "service: ${services[$i]} status: $status"
	    	if [[ $status != *"UP"* ]];
	    	then
	    		unhealthyServices=$[unhealthyServices + 1]
	    	fi
		done
		
		echo "Unhealthy services: $unhealthyServices"
	done
	
	exit 0
}

main