typhoon/digital-ocean/fedora-coreos/kubernetes/butane/worker.yaml

---
variant: fcos
version: 1.5.0
systemd:
  units:
    - name: containerd.service
      enabled: true
    - name: docker.service
      mask: true
    - name: wait-for-dns.service
      enabled: true
      contents: |
        [Unit]
        Description=Wait for DNS entries
        Before=kubelet.service
        [Service]
        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
      enabled: true
      contents: |
        [Unit]
        Description=Kubelet (System Container)
        Requires=afterburn.service
        After=afterburn.service
        Wants=rpc-statd.service
        [Service]
        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.27.2
        EnvironmentFile=/run/metadata/afterburn
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
        ExecStartPre=/bin/mkdir -p /var/lib/calico
        ExecStartPre=/bin/mkdir -p /var/lib/kubelet/volumeplugins
        ExecStartPre=/usr/bin/bash -c "grep 'certificate-authority-data' /etc/kubernetes/kubeconfig | awk '{print $2}' | base64 -d > /etc/kubernetes/ca.crt"
        ExecStartPre=-/usr/bin/podman rm kubelet
        ExecStart=/usr/bin/podman run --name kubelet \
          --log-driver k8s-file \
          --privileged \
          --pid host \
          --network host \
          --volume /etc/cni/net.d:/etc/cni/net.d:ro,z \
          --volume /etc/kubernetes:/etc/kubernetes:ro,z \
          --volume /usr/lib/os-release:/etc/os-release:ro \
          --volume /etc/machine-id:/etc/machine-id:ro \
          --volume /lib/modules:/lib/modules:ro \
          --volume /run:/run \
          --volume /sys/fs/cgroup:/sys/fs/cgroup \
          --volume /etc/selinux:/etc/selinux \
          --volume /sys/fs/selinux:/sys/fs/selinux \
          --volume /var/lib/calico:/var/lib/calico:ro \
          --volume /var/lib/containerd:/var/lib/containerd \
          --volume /var/lib/kubelet:/var/lib/kubelet:rshared,z \
          --volume /var/log:/var/log \
          --volume /var/run/lock:/var/run/lock:z \
          --volume /opt/cni/bin:/opt/cni/bin:z \
          $${KUBELET_IMAGE} \
          --anonymous-auth=false \
          --authentication-token-webhook \
          --authorization-mode=Webhook \
          --bootstrap-kubeconfig=/etc/kubernetes/kubeconfig \
          --config=/etc/kubernetes/kubelet.yaml \
          --container-runtime-endpoint=unix:///run/containerd/containerd.sock \
          --hostname-override=$${AFTERBURN_DIGITALOCEAN_IPV4_PRIVATE_0} \
          --kubeconfig=/var/lib/kubelet/kubeconfig \
          --node-labels=node.kubernetes.io/node
        ExecStop=-/usr/bin/podman stop kubelet
        Delegate=yes
        Restart=always
        RestartSec=10
        [Install]
        WantedBy=multi-user.target        
    - name: kubelet.path
      enabled: true
      contents: |
        [Unit]
        Description=Watch for kubeconfig
        [Path]
        PathExists=/etc/kubernetes/kubeconfig
        [Install]
        WantedBy=multi-user.target        
storage:
  directories:
    - path: /etc/kubernetes
  files:
    - path: /etc/kubernetes/kubelet.yaml
      mode: 0644
      contents:
        inline: |
          apiVersion: kubelet.config.k8s.io/v1beta1
          kind: KubeletConfiguration
          authentication:
            anonymous:
              enabled: false
            webhook:
              enabled: true
            x509:
              clientCAFile: /etc/kubernetes/ca.crt
          authorization:
            mode: Webhook
          cgroupDriver: systemd
          clusterDNS:
            - ${cluster_dns_service_ip}
          clusterDomain: ${cluster_domain_suffix}
          healthzPort: 0
          rotateCertificates: true
          shutdownGracePeriod: 45s
          shutdownGracePeriodCriticalPods: 30s
          staticPodPath: /etc/kubernetes/manifests
          readOnlyPort: 0
          resolvConf: /run/systemd/resolve/resolv.conf
          volumePluginDir: /var/lib/kubelet/volumeplugins          
    - path: /etc/systemd/logind.conf.d/inhibitors.conf
      contents:
        inline: |
          [Login]
          InhibitDelayMaxSec=45s          
    - path: /etc/sysctl.d/max-user-watches.conf
      contents:
        inline: |
          fs.inotify.max_user_watches=16184          
    - path: /etc/sysctl.d/reverse-path-filter.conf
      contents:
        inline: |
          net.ipv4.conf.default.rp_filter=0
          net.ipv4.conf.*.rp_filter=0          
    - path: /etc/systemd/network/50-flannel.link
      contents:
        inline: |
          [Match]
          OriginalName=flannel*
          [Link]
          MACAddressPolicy=none          
    - path: /etc/systemd/system.conf.d/accounting.conf
      contents:
        inline: |
          [Manager]
          DefaultCPUAccounting=yes
          DefaultMemoryAccounting=yes
          DefaultBlockIOAccounting=yes          
    - path: /etc/containerd/config.toml
      overwrite: true
      contents:
        inline: |
          version = 2
          root = "/var/lib/containerd"
          state = "/run/containerd"
          subreaper = true
          oom_score = -999
          [grpc]
          address = "/run/containerd/containerd.sock"
          uid = 0
          gid = 0
          [plugins."io.containerd.grpc.v1.cri"]
          enable_selinux = true
          [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
          runtime_type = "io.containerd.runc.v2"
          [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
          SystemdCgroup = true