Auto Scaling Without Load Balancer in GCP

Can someone help me with GCP autoscaling. I want to achive Auto Scaling Without using Load Balancer in GCP because the service which is running on the VM does not need any endpoint its more likely a kafka consumer where its only fetch the data from cluster and send it to DB so there is no load balancing.

so far i have successfully created instaces template and have define the minimum and maximum state there but thats only maintaining the running state not perfroming autoscaling.

You can use instance groups which is a collection of virtual machine (VM) instances that you can manage as a single entity.

Autoscaling groups of instances have managed instance groups which will autoscale as per requirement by using the following policies.

1. CPU Usage: The size of the group is controlled to keep the average processor load of the virtual machines in the group at the required level
2. HTTP Load Balancing Usage: The size of the group is controlled to keep the load of the HTTP traffic balancer at the required level
3. Stackdriver Monitoring Metric: The size of the group is controlled to keep the selected metric from the Stackdriver Monitoring instrument at the required level .
4. Multiple Metrics: The decision to change the size of the group is made on the basis of multiple metrics.

Select your required policy and create a managed group of instances which will autoscale your VM.Here in this document you can find the steps to create scaling based on CPU usage, similarly you can create a required group.

For understanding attaching a Blog refer to it for more information.