Wait until a web service is up and accepts connections

wait-for-service.sh

#!/bin/sh

### not needed
echo "$(tput setaf 3)waiting for api service to accept connections$(tput sgr0)"
printf '%*s\n' "${COLUMNS:-$(tput cols)}" '' | tr ' ' -
###

api_service_url="http://localhost:8080" # FIXME enter correct url
attempt_counter=0
max_attempts=20

until [ $(curl -s -o /dev/null -w "%{http_code}" $api_service_url) -ne 000 ]; do
    if [ ${attempt_counter} -eq ${max_attempts} ];then
      echo "Unable to ping api service, aborting"
      exit 1
    fi

    printf '.'
    attempt_counter=$(($attempt_counter+1))
    sleep 3
done