app.check.sh

  ## Check all response codes for Docker containers. 
  ##
  ## 
  ##  source <(curl -s https://gist.githubusercontent.com/andypotanin/e1876800b56acc63c462/raw)

function app.check {

  for app in $( docker ps -q -f=status=running ); do
    _hostname=$(docker inspect -f '{{ .Config.Hostname }}' $app);
    _domainname=$(docker inspect -f '{{ .Config.Domainname }}' $app);
    _name=$(docker inspect -f '{{ .Name }}' $app);
    #_code=$(curl --max-time 10 --silent --output /dev/null  -H "X-Forwarded-Proto:https" -H 'host:${_hostname}.${_domainname}' -w "%{http_code}" $(docker port $app 80));
    #echo "curl -X HEAD --max-time 10 --silent --output /dev/null  -H "X-Forwarded-Proto:https" -H 'host:${_hostname}' -w "%{http_code}" $(docker port $app 80)"

    _code=$(curl -X HEAD --max-time 10 --silent --output /dev/null -L  \
      -H "Connection: close" \
      -H "X-Request-Type: varnish-probe" \
      -H "X-Forwarded-Proto:https" \
      -H "host:${_hostname}" \
      -w "%{http_code}" $(docker port ${_name} 80));
    
    #echo "Code: [${_code}]."
    
    ## No response, e.g. Nginx down.
    if [ "${_code}" == "000" ]; then
      echo -e " * \e[1;31m [$_code] \e[0m - ${_name} (TCP Failure)"
    fi

    if [ "${_code}" == "500" ] || [ "${_code}" == "502" ]; then
      echo -e " * \e[1;34m [$_code] \e[0m - ${_name} "
    fi
    
    if [ "${_code}" == "200" ]; then
      echo -e " * \e[1;32m [$_code] \e[0m - ${_name} "
    fi
    
    if [ "${_code}" == "302" ]; then
      echo -e " * \e[1;32m [$_code] \e[0m - ${_name} "
      # echo -e " * \e[1;34m [$_code] \e[0m - ${_name} "
    fi;

    if [ "${_code}" == "301" ]; then
      echo -e " * \e[1;32m [$_code] \e[0m - ${_name} "
      # echo -e " * \e[1;34m [$_code] \e[0m - ${_name} "
    fi;

  done

}

#app.check