apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: promtail
  namespace: loki
  labels:
    app.kubernetes.io/name: promtail
spec:
  selector:
    matchLabels:
      app.kubernetes.io/name: promtail
  updateStrategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 1
  template:
    metadata:
      labels:
        app.kubernetes.io/name: promtail
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "3101"
        prometheus.io/path: "/metrics"
    spec:
      serviceAccountName: promtail
      tolerations:
        - effect: NoSchedule
          key: node-role.kubernetes.io/master
          operator: Exists
        - effect: NoSchedule
          key: node-role.kubernetes.io/control-plane
          operator: Exists
      containers:
        - name: promtail
          image: grafana/promtail:3.3.2
          imagePullPolicy: IfNotPresent
          args:
            - -config.file=/etc/promtail/promtail.yaml
          ports:
            - name: http-metrics
              containerPort: 3101
              protocol: TCP
          env:
            - name: HOSTNAME
              valueFrom:
                fieldRef:
                  fieldPath: spec.nodeName
          readinessProbe:
            httpGet:
              path: /ready
              port: http-metrics
            initialDelaySeconds: 10
            periodSeconds: 10
            timeoutSeconds: 5
            failureThreshold: 5
          resources:
            requests:
              cpu: 50m
              memory: 64Mi
            limits:
              cpu: 200m
              memory: 128Mi
          securityContext:
            allowPrivilegeEscalation: false
            capabilities:
              drop:
                - ALL
            readOnlyRootFilesystem: true
          volumeMounts:
            - name: config
              mountPath: /etc/promtail
            - name: run
              mountPath: /run/promtail
            - name: containers
              mountPath: /var/lib/docker/containers
              readOnly: true
            - name: pods
              mountPath: /var/log/pods
              readOnly: true
            - name: journal
              mountPath: /var/log/journal
              readOnly: true
            - name: machine-id
              mountPath: /etc/machine-id
              readOnly: true
      volumes:
        - name: config
          configMap:
            name: promtail-config
        - name: run
          emptyDir: {}
        - name: containers
          hostPath:
            path: /var/lib/docker/containers
        - name: pods
          hostPath:
            path: /var/log/pods
        - name: journal
          hostPath:
            path: /var/log/journal
        - name: machine-id
          hostPath:
            path: /etc/machine-id