maxkoshel/kubernetes-scripts

☸️ Useful scripts for Kubernetes

Useful script for Kubernetes

Making pods and services IPs reachable from localhost

Original: kubernetes/minikube#38 (comment)

This will make your minikube pod and service IPs routable from your host. If you only want service IPs, you can edit this accordingly.

Environment

OS: macOS ( should work for linux as well, but instead of sudo route -n you would use sudo ip route in the script)

Steps

1. Stop the minikube VM in case it's started

$ minikube stop

2. Go to the virtualbox GUI (steps 2. and 3. are needed because of #1710)

• Right click on the minikube VM -> Settings -> Network for Adapter 1 and Adapter 2 select Advanced and change the adapter type to something other that Intel. For example, PCne-FAST III (Am79C973).
• Open the minikube config file which should be here: ~/.minikube/machines/minikube/config.json and change the value for the fields: NatNicType and HostOnlyNicType to match the ones that you set in virtualbox in the previous step. In this case, for example: Am79C973.

3. Stop docker on your machine as the ip ranges that you're adding routes for might overlap with the docker ones.

4. Start minikube and wait for it to start

$ minikube start

5. Make the script setup_minikube_routing.sh executable:

$ chmod +x ./scripts/setup_minikube_routing.sh

6. Run the script to set up the routes

$ ./scripts/setup_minikube_routing.sh

Caveats and improvements

• The IP ranges are hardcoded in the script. We should get those dinamically.
• Minikube needs to be running for the script to run successfully.
• Make sure that the routes you're adding don't overlap with some local routing that you have.
• If you have problems with a pod unable to reach itself through a service, you can run:

$ minikube ssh
$ sudo ip link set docker0 promisc on