kubernetes.yaml

---
apiVersion: v1
kind: Namespace
metadata:
  name: oled
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
  labels:
    app: oled
  name: oled
  namespace: oled
spec:
  selector:
    matchLabels:
      app: oled
  updateStrategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 0
      maxUnavailable: "100%" # replace all of them at once
  template:
    metadata:
      labels:
        app: oled
    spec:
      automountServiceAccountToken: false
      containers:
      - name: oled
        command: ["oled"]
        args:
          - --mounts=/host/data/chunks
          - --load
          - --memory
          - --brightness=dim
          - --device=/host/dev/i2c-0
        image: m3t0r/oled:latest
        imagePullPolicy: Always
        env:
          - name: OLED_HOSTNAME
            valueFrom:
              fieldRef: 
                fieldPath: spec.nodeName
        securityContext:
          privileged: true # for access to i2c device
          capabilities:
            drop:
            - ALL
          readOnlyRootFilesystem: true
        resources:
          requests:
            cpu: 10m
            memory: 1Mi
          limits:
            cpu: 20m
            memory: 5Mi
        volumeMounts:
        - mountPath: /host
          mountPropagation: HostToContainer
          name: root
          readOnly: true
      restartPolicy: Always
      securityContext: # write access to i2c device
        runAsNonRoot: false
        runAsUser: 0
        runAsGroup: 0
      volumes:
      - hostPath:
          path: /
        name: root