Hi I am working on Google Cloud platform where I am not using GKE. Rather I am creating k8s cluster manually. Following is my setup, Total 11 server 1. Out of these 5 servers would be static servers and don't need any scaling 2. remaining 5 server would need up scaling if CPU or RAM consumption goes beyond certain limit. i.e. I will spin only 3 servers initially and if CPU/RAM threshold is crossed then I will spin 2 more using Google Cloud Load balancer. 3. 1 k8s Master server
To implement this load balancer I have already created one Custom Image on which I have installed docker and kubernetes. Using this I have create one instance template and then instance group.
Now the problem statement is , Although I have created image with everything installed , When I am creating a instance group in which 3 VM are being created , these VMs does not automatically connect to my k8s master. Is there any way to automatically connect newly created VM as a node to k8s master so that I do not have run join command manually on each server ?
Thanks for the help in advance.
so that I do not have run join command manually on each server
I am assuming that you can successfully run the join command to join the newly created VMs to the Kubernetes master manually. <br>
If that is the case, you can use the startup-script feature in the Google Compute Engine. <br>
Here is the documentation: <br>
https://cloud.google.com/compute/docs/instances/startup-scripts <br>
https://cloud.google.com/compute/docs/instances/startup-scripts/linux#passing-directly <br> <br>
In short, startup-script is the feature from Google Compute Engine to automatically run our customized script during start-up.
And, the script could look something like this:
#! /bin/bash
kubeadm join .......