google_compute_k8s_ubuntu_16.04_master.sh

# ------------------------------------------------------------------------------------------------------------------------
# We are explicitly not using a templating language to inject the values as to encourage the user to limit their
# use of templating logic in these files. By design all injected values should be able to be set at runtime,
# and the shell script real work. If you need conditional logic, write it in bash or make another shell script.
# ------------------------------------------------------------------------------------------------------------------------

# Specify the Kubernetes version to use.
KUBERNETES_VERSION="1.10.11"
KUBERNETES_CNI="0.6.0"

# Obtain metadata.
PRIVATEIP=`curl --retry 5 -sfH "Metadata-Flavor: Google" "http://metadata/computeMetadata/v1/instance/network-interfaces/0/ip"`
PUBLICIP=`curl --retry 5 -sfH "Metadata-Flavor: Google" "http://metadata/computeMetadata/v1/instance/network-interfaces/0/access-configs/0/external-ip"`
HOSTNAME=`curl --retry 5 -sfH "Metadata-Flavor: Google" "http://metadata/computeMetadata/v1/instance/name"`
echo $PRIVATEIP > /tmp/.ip

# Add APT repository and GPG key.
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
touch /etc/apt/sources.list.d/kubernetes.list
sh -c 'echo "deb http://apt.kubernetes.io/ kubernetes-xenial main" > /etc/apt/sources.list.d/kubernetes.list'

# Install packages.
apt-get update -y
apt-get install -y \
    socat \
    ebtables \
    docker.io \
    apt-transport-https \
    kubelet=${KUBERNETES_VERSION}-00 \
    kubeadm=${KUBERNETES_VERSION}-00 \
    kubernetes-cni=${KUBERNETES_CNI}-00 \
    cloud-utils \
    jq

# Enable and start Docker.
systemctl enable docker
systemctl start docker

# Parse kubicorn configuration file.
TOKEN=$(cat /etc/kubicorn/cluster.json | jq -r '.clusterAPI.spec.providerConfig' | jq -r '.values.itemMap.INJECTEDTOKEN')
PORT=$(cat /etc/kubicorn/cluster.json | jq -r '.clusterAPI.spec.providerConfig' | jq -r '.values.itemMap.INJECTEDPORT | tonumber')

# Create kubeadm configuration file.
touch /etc/kubicorn/kubeadm-config.yaml
cat << EOF  > "/etc/kubicorn/kubeadm-config.yaml"
apiVersion: kubeadm.k8s.io/v1alpha1
kind: MasterConfiguration
token: ${TOKEN}
kubernetesVersion: ${KUBERNETES_VERSION}
nodeName: ${HOSTNAME}
api:
  advertiseAddress: ${PUBLICIP}
  bindPort: ${PORT}
apiServerCertSANs:
- ${PRIVATEIP}
- ${PUBLICIP}
- ${HOSTNAME}
authorizationModes:
- Node
- RBAC
EOF

# Initialize cluster.
kubeadm reset
kubeadm init --config /etc/kubicorn/kubeadm-config.yaml --ignore-preflight-errors=SystemVerification

# Weave CNI plugin.
curl -SL "https://cloud.weave.works/k8s/net?k8s-version=$(kubectl version | base64 | tr -d '\n')&env.IPALLOC_RANGE=172.16.6.64/27" \
| kubectl apply --kubeconfig /etc/kubernetes/admin.conf -f -

# Prepare kubeconfig file.
mkdir -p /home/ubuntu/.kube
cp /etc/kubernetes/admin.conf /home/ubuntu/.kube/config
chown -R ubuntu:ubuntu /home/ubuntu/.kube