Right now im setting up a Kubernetes cluster with Azure Kubernetes Service (AKS).
Im using the feature "Bring your own Subnet" and Kubenet as a network mode. As you can see in the diagram, on the left side is an example vm. In the middle is a load balancer I set up in the cluster, who directs incoming traffic to all pods with the label "webserver", this works fine. On the right side is an example node of the cluster.
My problem is the outgoing traffic of nodes. As you would expect, if you try to ssh into a vm in subnet 1 from a node in subnet 2, it uses the nodes-ip for connecting, the .198. (Red Line)
I would like to route the traffic over the load balancer, so the incoming ssh connection at the vm in subnet 1 has a source address of .196. (Green Line)
Reason: We have got a central firewall. To open ports, I have to specify the ip-address, from which the package is coming from. For this case, I would like to route the traffic over on central load balancer so only one ip has to be allowed through in the firewall. Otherwise, every package would have the source ip of the node.
Is this possible?
I have tried to look this use case up in the azure docs, but most of the times it talks about the usage of public ips, which i am not using in this case.