gcloud compute networks create my-vpc --subnet-mode=custom

gcloud compute networks subnets create my-subnet \
  --network=my-vpc \
  --region=us-central1 \
  --range=10.0.0.0/24

gcloud compute firewall-rules create allow-http \
  --network=my-vpc \
  --allow=tcp:80,tcp:443 \
  --source-ranges=0.0.0.0/0 \
  --target-tags=http-server

gcloud compute firewall-rules create allow-internal \
  --network=my-vpc \
  --allow=tcp,udp,icmp \
  --source-ranges=10.0.0.0/8

gcloud compute routers create my-router \
  --network=my-vpc \
  --region=us-central1

gcloud compute routers nats create my-nat \
  --router=my-router \
  --region=us-central1 \
  --nat-all-subnet-ip-ranges \
  --auto-allocate-nat-external-ips