node.yaml

#cloud-config

write_files:
# Setup containerd.
  - path: /etc/systemd/system/containerd-installation.service
    permissions: 0644
    owner: root
    content: |
      # installed by cloud-init
      [Unit]
      Description=Download and install containerd binaries and configurations.
      After=network-online.target

      [Service]
      Type=oneshot
      RemainAfterExit=yes
      ExecStartPre=/bin/mkdir -p /home/containerd
      ExecStartPre=/bin/mount --bind /home/containerd /home/containerd
      ExecStartPre=/bin/mount -o remount,exec /home/containerd
      ExecStartPre=/usr/bin/curl --fail --retry 5 --retry-delay 3 --silent --show-error -H "X-Google-Metadata-Request: True" -o /home/containerd/configure.sh http://metadata.google.internal/computeMetadata/v1/instance/attributes/containerd-configure-sh
      ExecStartPre=/bin/chmod 544 /home/containerd/configure.sh
      ExecStart=/home/containerd/configure.sh

      [Install]
      WantedBy=containerd.target

  - path: /etc/systemd/system/containerd.service
    permissions: 0644
    owner: root
    content: |
      # installed by cloud-init
      [Unit]
      Description=containerd container runtime
      Documentation=https://containerd.io
      After=containerd-installation.service

      [Service]
      Restart=always
      RestartSec=5
      Delegate=yes
      KillMode=process
      OOMScoreAdjust=-999
      LimitNOFILE=1048576
      # Having non-zero Limit*s causes performance problems due to accounting overhead
      # in the kernel. We recommend using cgroups to do container-local accounting.
      LimitNPROC=infinity
      LimitCORE=infinity
      TasksMax=infinity
      ExecStartPre=/sbin/modprobe overlay
      ExecStart=/home/containerd/usr/local/bin/containerd

      [Install]
      WantedBy=containerd.target

  - path: /etc/systemd/system/containerd.target
    permissions: 0644
    owner: root
    content: |
      [Unit]
      Description=Containerd

      [Install]
      WantedBy=kubernetes.target

# Setup kubernetes.
  - path: /etc/systemd/system/kube-node-installation.service
    permissions: 0644
    owner: root
    content: |
      [Unit]
      Description=Download and install k8s binaries and configurations
      After=network-online.target containerd.target
      Wants=network-online.target containerd.target

      [Service]
      Type=oneshot
      RemainAfterExit=yes
      ExecStartPre=/bin/mkdir -p /home/kubernetes/bin
      ExecStartPre=/bin/mount --bind /home/kubernetes/bin /home/kubernetes/bin
      ExecStartPre=/bin/mount -o remount,exec /home/kubernetes/bin
      ExecStartPre=/usr/bin/curl --fail --retry 5 --retry-delay 3 --silent --show-error	-H "X-Google-Metadata-Request: True" -o /home/kubernetes/bin/configure.sh http://metadata.google.internal/computeMetadata/v1/instance/attributes/configure-sh
      ExecStartPre=/bin/chmod 544 /home/kubernetes/bin/configure.sh
      ExecStart=/home/kubernetes/bin/configure.sh

      [Install]
      WantedBy=kubernetes.target

  - path: /etc/systemd/system/kube-node-configuration.service
    permissions: 0644
    owner: root
    content: |
      [Unit]
      Description=Configure kubernetes node
      After=kube-node-installation.service

      [Service]
      Type=oneshot
      RemainAfterExit=yes
      ExecStartPre=/bin/chmod 544 /home/kubernetes/bin/configure-helper.sh
      ExecStart=/home/kubernetes/bin/configure-helper.sh

      [Install]
      WantedBy=kubernetes.target

  - path: /etc/systemd/system/kube-container-runtime-monitor.service
    permissions: 0644
    owner: root
    content: |
      [Unit]
      Description=Kubernetes health monitoring for container runtime
      After=kube-node-configuration.service
      [Service]
      Restart=always
      RestartSec=10
      RemainAfterExit=yes
      RemainAfterExit=yes
      ExecStartPre=/bin/chmod 544 /home/kubernetes/bin/health-monitor.sh
      ExecStart=/home/kubernetes/bin/health-monitor.sh container-runtime
      [Install]
      WantedBy=kubernetes.target

  - path: /etc/systemd/system/kubelet-monitor.service
    permissions: 0644
    owner: root
    content: |
      [Unit]
      Description=Kubernetes health monitoring for kubelet
      After=kube-node-configuration.service

      [Service]
      Restart=always
      RestartSec=10
      RemainAfterExit=yes
      ExecStartPre=/bin/chmod 544 /home/kubernetes/bin/health-monitor.sh
      ExecStart=/home/kubernetes/bin/health-monitor.sh kubelet

      [Install]
      WantedBy=kubernetes.target

  - path: /etc/systemd/system/kube-logrotate.timer
    permissions: 0644
    owner: root
    content: |
      [Unit]
      Description=Hourly kube-logrotate invocation

      [Timer]
      OnCalendar=hourly

      [Install]
      WantedBy=kubernetes.target

  - path: /etc/systemd/system/kube-logrotate.service
    permissions: 0644
    owner: root
    content: |
      [Unit]
      Description=Kubernetes log rotation
      After=kube-node-configuration.service

      [Service]
      Type=oneshot
      ExecStart=-/usr/sbin/logrotate /etc/logrotate.conf

      [Install]
      WantedBy=kubernetes.target

  - path: /etc/systemd/system/kubernetes.target
    permissions: 0644
    owner: root
    content: |
      [Unit]
      Description=Kubernetes

      [Install]
      WantedBy=multi-user.target

runcmd:
  # Stop the existing containerd service if there is one. (for Docker 18.09+)
  - systemctl is-active containerd && systemctl stop containerd
  - systemctl daemon-reload
  - systemctl enable containerd-installation.service
  - systemctl enable containerd.service
  - systemctl enable containerd.target
  - systemctl enable kube-node-installation.service
  - systemctl enable kube-node-configuration.service
  - systemctl enable kubelet-monitor.service
  - systemctl enable kube-container-runtime-monitor.service
  - systemctl enable kube-logrotate.timer
  - systemctl enable kube-logrotate.service
  - systemctl enable kubernetes.target
  - systemctl start kubernetes.target
  # Start docker after containerd is running. (for Docker 18.09+)
  - systemctl is-enabled docker && (systemctl is-active docker || systemctl start docker)