Saved from https://github.com/kelseyhightower/kubernetes-the-hard-way/blob/master/docs/03-compute-resources.md

create_network.sh

gcloud compute networks create kubernetes-the-hard-way --subnet-mode custom

create_subnet.sh

gcloud compute networks subnets create kubernetes \
  --network kubernetes-the-hard-way \
  --range 10.240.0.0/24

firewall.sh

gcloud compute firewall-rules create kubernetes-the-hard-way-allow-internal \
  --allow tcp,udp,icmp \
  --network kubernetes-the-hard-way \
  --source-ranges 10.240.0.0/24,10.200.0.0/16
  
  gcloud compute firewall-rules create kubernetes-the-hard-way-allow-external \
  --allow tcp:22,tcp:6443,icmp \
  --network kubernetes-the-hard-way \
  --source-ranges 0.0.0.0/0