问自定义Kubernetes HPA算法

EN

    let desiredToSet = 0;
    if (!readyMessages && !processingMessages) {
      //if we have nothing in queue and all workers completed their work - we can scale down to minimum
      //we like it better than reducing slowly as this way we are not risking killing a worker that's working
      desiredToSet = config.minDesired;
    }
    else {
      //messages ready in the queue, increase number of workers up to max allowed
      desiredToSet = Math.max(Math.min(readyMessages + processingMessages, config.maxDesired), currentDeploymentReplicas);
    }
    //no point in sending a request to change, if nothing changed
    if (desiredToSet !== currentDeploymentReplicas) {
      <api to set desiredToSet of deployment to come here>;
    }