#cloud-config
---
hostname: kubernetes-master
users:
  - name: core
    ssh-authorized-keys: 
      - "<SSH_PUBLIC_KEY>"
    groups: 
      - sudo
    shell: /bin/bash

write_files:
  - path: /opt/bin/kubernetes-install.sh
    owner: root
    permissions: 0755
    content: |
      #! /usr/bin/bash
      
      if [ ! -f /opt/bin/kubelet ]; then
        echo "Kubenetes not installed - installing."

        # Extract the Kubernetes binaries.
        sudo wget -N -P /opt/bin http://storage.googleapis.com/kubernetes-release/release/v1.1.3/bin/linux/amd64/kubectl
        sudo wget -N -P /opt/bin http://storage.googleapis.com/kubernetes-release/release/v1.1.3/bin/linux/amd64/kubelet
        sudo chmod +x /opt/bin/kubelet /opt/bin/kubectl
      fi

  - path: /opt/bin/calico-install.sh
    owner: root
    permissions: 0755
    content: |
      #! /usr/bin/bash
      
      if [ ! -f /opt/bin/calicoctl ]; then
        echo "Calico not installed - installing."
       
        # Install the `calicoctl` binary
        wget https://github.com/projectcalico/calico-containers/releases/download/v0.14.0/calicoctl
        chmod +x calicoctl
        sudo mv calicoctl /opt/bin

        # Fetch the calico/node container
        sudo docker pull calico/node:v0.14.0
      fi

  - path: /opt/bin/install-manifests.sh
    owner: root
    permissions: 0755
    content: |
      #! /usr/bin/bash
      
      # Ensure directories exists.
      sudo mkdir -p /etc/kubernetes/manifests/
      sudo mkdir -p /etc/kubernetes/ssl/
      sudo mkdir -p /etc/kubernetes/addons/
      
      if [ ! -f /etc/kubernetes/manifests/kubernetes-master.manifest -o ! -f /etc/kubernetes/manifests/calico-etcd.manifest ]; then
        echo "Manifests not installed - installing."

        # Download config.
        sudo wget -N -P /etc/kubernetes/manifests/ https://raw.githubusercontent.com/projectcalico/calico-cni/k8s-1.1-docs/samples/kubernetes/master/kubernetes-master.manifest
        sudo wget -N -P /etc/kubernetes/manifests/ https://raw.githubusercontent.com/projectcalico/calico-cni/k8s-1.1-docs/samples/kubernetes/master/calico-etcd.manifest
        sudo wget -N -P /etc/kubernetes/addons/ https://raw.githubusercontent.com/projectcalico/calico-cni/k8s-1.1-docs/samples/kubernetes/master/dns/skydns.yaml
      fi

      # Insert the master's IP address into the manifest.
      echo "DEFAULT_IPV4: $DEFAULT_IPV4"
      sudo sed -i -e "s/<MASTER_IPV4>/$DEFAULT_IPV4/g" /etc/kubernetes/manifests/calico-etcd.manifest

coreos:
  update:
    reboot-strategy: off
  units:
    - name: setup-network-environment.service
      runtime: true
      command: start
      content: |
        [Unit]
        Description=Setup Network Environment
        Documentation=https://github.com/kelseyhightower/setup-network-environment
        Requires=network-online.target
        After=network-online.target

        [Service]
        ExecStartPre=-/usr/bin/mkdir -p /opt/bin
        ExecStartPre=-/usr/bin/wget -N -P /opt/bin https://github.com/kelseyhightower/setup-network-environment/releases/download/1.0.1/setup-network-environment
        ExecStartPre=-/usr/bin/chmod +x /opt/bin/setup-network-environment
        ExecStart=/opt/bin/setup-network-environment
        RemainAfterExit=yes
        Type=oneshot

    - name: manifest-install.service
      runtime: true
      command: start
      content: |
        [Unit]
        Description=Installs Manifests 
        After=setup-network-environment.service
        Requires=setup-network-environment.service

        [Service]
        EnvironmentFile=/etc/network-environment
        ExecStart=/opt/bin/install-manifests.sh
        RemainAfterExit=yes
        Type=oneshot

    - name: kubernetes-install.service
      runtime: true
      command: start
      content: |
        [Unit]
        Description=Installs Kubernetes tools
        After=manifest-install.service
        Requires=manifest-install.service

        [Service]
        ExecStart=/opt/bin/kubernetes-install.sh
        RemainAfterExit=yes
        Type=oneshot

    - name: kubelet.service
      runtime: true
      command: start
      content: |
        [Unit]
        Description=Kubernetes Kubelet
        Documentation=https://github.com/kubernetes/kubernetes
        Requires=docker.service kubernetes-install.service
        After=kubernetes-install.service
  
        [Service]
        ExecStart=/opt/bin/kubelet \
        --register-node=false \
        --allow-privileged=true \
        --config=/etc/kubernetes/manifests \
        --cluster-dns=10.100.0.10 \
        --cluster_domain=cluster.local \
        --logtostderr=true
        Restart=always
        RestartSec=10
  
        [Install]
        WantedBy=multi-user.target

    - name: calico-install.service
      runtime: true
      command: start
      content: |
        [Unit]
        Description=Installs Calico tools
        After=kubelet.service
        Requires=kubelet.service

        [Service]
        ExecStart=/opt/bin/calico-install.sh
        RemainAfterExit=yes
        Type=oneshot

    - name: calico-node.service
      runtime: true
      command: start
      content: |
        [Unit]
        Description=Calico per-node agent
        Documentation=https://github.com/projectcalico/calico-docker
        After=docker.service
        Requires=docker.service
        
        [Service]
        User=root
        EnvironmentFile=/etc/network-environment
        Environment="ETCD_AUTHORITY=127.0.0.1:6666"
        PermissionsStartOnly=true
        ExecStart=/opt/bin/calicoctl node --ip=${DEFAULT_IPV4} --detach=false
        Restart=always
        RestartSec=10
    
        [Install]
        WantedBy=multi-user.target