Minikube host networking integration

README.md

Minikube host networking integration

Make it possible for your host to do dns lookups and reach internal pods and svcs in Minikube directly.

Networking

MacOS:

$ sudo route -n add 10.96.0.0/12 $(minikube ip) # svc
$ sudo route -n add 172.17.0.0/16 $(minikube ip) # pods

Linux:

$ sudo ip route add 10.96.0.0/12 via $(minikube ip) # svc
$ sudo ip route add 172.17.0.0/16 via $(minikube ip) # pods

Fix issues with Minikube loosing connectivity

There seems to be an issue with virtio.

# needs to be redone when recreating minikube
$ minikube stop
$ sed -i 's/virtio/Am79C973/g' ~/.minikube/machines/minikube/config.json
$ minikube start

DNS

MacOS:

# Create /etc/resolver dir
$ sudo mkdir /etc/resolver

# Setup resolver to use Kubernetes dns server for all *.cluster.local lookups
$ echo "nameserver 10.96.0.10" | sudo tee /etc/resolver/cluster.local

# Restart MacOS resolver
$ sudo killall -HUP mDNSResponder;sudo killall mDNSResponderHelper;sudo dscacheutil -flushcache

Linux:

Todo

Troubleshooting

# List all resolvers
$ scutil --dns

# Try to reach internal kubernetes dns server
$ dig @10.96.0.10 kubernetes-dashboard.kube-system.svc.cluster.local

References

• https://stackoverflow.com/questions/42652781/dev-machine-as-part-of-minikubes-network
• https://stackoverflow.com/questions/42268814/routing-an-internal-kubernetes-ip-address-to-the-host-system
• https://github.com/kubernetes/minikube/blob/master/pkg/util/constants.go#L32