worker.yaml.tmpl

---
systemd:
  units:
    - name: docker.service
      enable: true
    - name: locksmithd.service
      mask: true
    - name: iscsid.service
      enabled: true
      dropins:
      - name: 00-iscsid.conf
        contents: |
          [Service]
          ExecStartPre=/bin/bash -c 'echo "InitiatorName=$(/sbin/iscsi-iname -p iqn.2020-01.io.kinvolk:01)" > /etc/iscsi/initiatorname.iscsi'
    - name: kubelet.path
      enable: true
      contents: |
        [Unit]
        Description=Watch for kubeconfig
        [Path]
        PathExists=/etc/kubernetes/kubeconfig
        [Install]
        WantedBy=multi-user.target
    - name: wait-for-dns.service
      enable: true
      contents: |
        [Unit]
        Description=Wait for DNS entries
        Wants=systemd-resolved.service
        Before=kubelet.service
        [Service]
        Restart=on-failure
        RestartSec=5s
        Type=oneshot
        RemainAfterExit=true
        ExecStart=/bin/sh -c 'while ! /usr/bin/grep '^[^#[:space:]]' /etc/resolv.conf > /dev/null; do sleep 1; done'
        [Install]
        RequiredBy=kubelet.service
    - name: kubelet.service
      contents: |
        [Unit]
        Description=Kubelet
        Wants=rpc-statd.service
        [Service]
        EnvironmentFile=/etc/kubernetes/kubelet.env
        ExecStartPre=/bin/mkdir -p /var/lib/kubelet/volumeplugins
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/usr/bin/bash -c "grep 'certificate-authority-data' /etc/kubernetes/kubeconfig | awk '{print $2}' | base64 -d > /etc/kubernetes/ca.crt"
        ExecStartPre=/etc/kubernetes/configure-kubelet-cgroup-driver
        ExecStartPre=-docker rm -f kubelet
        ExecStartPre=docker run -d \
          --name=kubelet \
          --restart=unless-stopped \
          --log-driver=journald \
          --network=host \
          --pid=host \
          --privileged \
          -v /dev:/dev:rw \
          -v /etc/cni/net.d:/etc/cni/net.d:ro \
          -v /etc/kubernetes:/etc/kubernetes:ro \
          -v /etc/machine-id:/etc/machine-id:ro \
          -v /lib/modules:/lib/modules:ro \
          -v /run:/run:rw \
          -v /sys:/sys:rw \
          -v /opt/cni/bin:/opt/cni/bin:ro \
          -v /usr/lib/os-release:/etc/os-release:ro \
          -v /var/lib/calico:/var/lib/calico:ro \
          -v /var/lib/cni:/var/lib/cni:rw \
          -v /var/lib/docker:/var/lib/docker:rw \
          -v /var/log/pods:/var/log/pods:rw \
          --mount type=bind,source=/mnt,target=/mnt,bind-propagation=rshared \
          --mount type=bind,source=/var/lib/kubelet,target=/var/lib/kubelet,bind-propagation=rshared \
          $${KUBELET_IMAGE_URL}:$${KUBELET_IMAGE_TAG} \
          --anonymous-auth=false \
          --authentication-token-webhook \
          --authorization-mode=Webhook \
          --client-ca-file=/etc/kubernetes/ca.crt \
          --cluster_dns=${cluster_dns_service_ip} \
          --cluster_domain=${cluster_domain_suffix} \
          --cni-conf-dir=/etc/cni/net.d \
          --config=/etc/kubernetes/kubelet.config \
          --exit-on-lock-contention \
          --hostname-override=${domain_name} \
          --kubeconfig=/var/lib/kubelet/kubeconfig \
          --bootstrap-kubeconfig=/etc/kubernetes/kubeconfig \
          --rotate-certificates \
          --lock-file=/var/run/lock/kubelet.lock \
          --network-plugin=cni \
          --node-labels=$${NODE_LABELS} \
          --pod-manifest-path=/etc/kubernetes/manifests \
          --read-only-port=0 \
          --volume-plugin-dir=/var/lib/kubelet/volumeplugins
        ExecStart=docker logs -f kubelet
        ExecStop=docker stop kubelet
        ExecStopPost=docker rm kubelet
        Restart=always
        RestartSec=5
        [Install]
        WantedBy=multi-user.target
storage:
  files:
    - path: /etc/kubernetes/kubelet.env
      filesystem: root
      mode: 0644
      contents:
        inline: |
          KUBELET_IMAGE_URL=quay.io/kinvolk/kubelet
          KUBELET_IMAGE_TAG=v1.19.4
          NODE_LABELS="${join(",", [for k, v in kubelet_labels : "${k}=${v}"])}"
    - path: /etc/hostname
      filesystem: root
      mode: 0644
      contents:
        inline:
          ${domain_name}
    - path: /etc/sysctl.d/max-user-watches.conf
      filesystem: root
      contents:
        inline: |
          fs.inotify.max_user_watches=16184
    - path: /etc/kubernetes/configure-kubelet-cgroup-driver
      filesystem: root
      mode: 0744
      contents:
        inline: |
          #!/bin/bash
          set -e
          readonly docker_cgroup_driver="$(docker info -f '{{.CgroupDriver}}')"
          cat <<EOF >/etc/kubernetes/kubelet.config
          apiVersion: kubelet.config.k8s.io/v1beta1
          kind: KubeletConfiguration
          cgroupDriver: "$${docker_cgroup_driver}"
          EOF
    - path: /etc/docker/daemon.json
      filesystem: root
      mode: 0500
      contents:
        inline: |
          {
            "live-restore": true,
            "log-opts": {
              "max-size": "100m",
              "max-file": "3"
            }
          }
passwd:
  users:
    - name: core
      ssh_authorized_keys: ${ssh_keys}