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Connect From GKE Kubernetes Pod To GCE VM Instance
If you want to access any Compute Engine VM instance from a POD within a K8S cluster on Google Cloud Platform, you will need to modify the firewall settings.
You can do this in two ways:
1- Add the network tag of the VM instance you are trying to reach to the target tags section of the “gke-[cluster-name + suffix]-all” rule that GKE creates by default. In my case, the tag I added was “elasticsearch-dev”.
2- Alternatively, you can create a rule similar to the default rule and add your own network tag. It's important to note that the "Priority" should be lower than the default rule.
Stay healthy…