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Kubernetes on GCE 1

2 min read

gcloud compute networks create example-k8s --subnet-mode custom
 
gcloud compute networks subnets create k8s-nodes \
  --network example-k8s \
  --range 10.240.0.0/24
 
gcloud compute firewall-rules create example-k8s-allow-internal \
  --allow tcp,udp,icmp,ipip \
  --network example-k8s \
  --source-ranges 10.240.0.0/24
 
gcloud compute firewall-rules create example-k8s-allow-external \
  --allow tcp:22,tcp:6443,icmp \
  --network example-k8s \
  --source-ranges 0.0.0.0/0
 
gcloud compute instances create controller \
    --async \
    --boot-disk-size 200GB \
    --can-ip-forward \
    --image-family ubuntu-1804-lts \
    --image-project ubuntu-os-cloud \
    --machine-type n1-standard-2 \
    --private-network-ip 10.240.0.11 \
    --scopes compute-rw,storage-ro,service-management,service-control,logging-write,monitoring \
    --subnet k8s-nodes \
    --zone us-east4-c \
    --tags example-k8s,controller
 
for i in 0; do
  gcloud compute instances create worker-${i} \
    --async \
    --boot-disk-size 200GB \
    --can-ip-forward \
    --image-family ubuntu-1804-lts \
    --image-project ubuntu-os-cloud \
    --machine-type n1-standard-2 \
    --private-network-ip 10.240.0.2${i} \
    --scopes compute-rw,storage-ro,service-management,service-control,logging-write,monitoring \
    --subnet k8s-nodes \
    --zone us-east4-c \
    --tags example-k8s,worker
done
 
# Install Docker on the controller VM and each worker VM. On each VM run:
 
sudo apt update
sudo apt install -y docker.io 
sudo systemctl enable docker.service
sudo apt install -y apt-transport-https curl
 
# Install kubeadm, kubelet, and kubectl on each node 
 
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
sudo apt-get update
sudo apt-get install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl
 
# Create the controller node of a new cluster. On the controller VM, execute:
 
sudo kubeadm init --pod-network-cidr 192.168.0.0/16
 
# The final line of the kubeadm init output contains the command for joining your workers to the controller. Run this on each worker, prepending sudo to run it as root. It will look something like this:
 
sudo kubeadm join 10.240.0.11:6443 --token <token> --discovery-token-ca-cert-hash sha256:<hash>
 
# Add some network addon (like flannel) from: https://kubernetes.io/docs/concepts/cluster-administration/addons/ 
 
wget https://raw.githubusercontent.com/flannel-io/flannel/master/Documentation/kube-flannel.yml
 
# EDIT THE "podCIDR" to match "10.240.0.0/24"
 
kubectl apply -f kube-flannel.yml

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