more up to date telegraf daemonset example (to InfluxDB 2.0)

telegraf.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: telegraf
  namespace: kube-system
  labels:
    k8s-app: telegraf
data:
  telegraf.conf: |+
    [agent]
      hostname = "$KUBELET_HOST"
    [[outputs.influxdb_v2]]
      urls = ["http://YOUR-INFLUXDB-INSTALL-HERE"]
      token = "$INFLUX_TOKEN"
      organization = "YOUR-ORGANIZATION-HERE"
      bucket = "YOUR-BUCKET-HERE"
    [[inputs.cpu]]
      percpu = true
      totalcpu = true
      collect_cpu_time = false
      report_active = false
    [[inputs.disk]]
      ignore_fs = ["tmpfs", "devtmpfs", "devfs"]
    [[inputs.diskio]]
    [[inputs.kernel]]
    [[inputs.mem]]
    [[inputs.processes]]
    [[inputs.swap]]
    [[inputs.system]]
    [[inputs.docker]]
      endpoint = "unix:///var/run/docker.sock"
    [[inputs.kubernetes]]
      url = "http://$KUBELET_HOST:10255"
---
# Section: Daemonset
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: telegraf
  namespace: kube-system
  labels:
    k8s-app: telegraf
spec:
  selector:
    matchLabels:
      name: telegraf
  template:
    metadata:
      labels:
        name: telegraf
    spec:
      containers:
      - name: telegraf
        image: docker.io/telegraf:1.10.4-alpine
        resources:
          limits:
            memory: 500Mi
          requests:
            cpu: 500m
            memory: 500Mi
        env:
        - name: HOSTNAME
          valueFrom:
            fieldRef:
              fieldPath: spec.nodeName
        - name: "HOST_PROC"
          value: "/rootfs/proc"
        - name: "HOST_SYS"
          value: "/rootfs/sys"
        - name: INFLUX_TOKEN
          valueFrom:
            secretKeyRef:
              name: telegraf
              key: INFLUX_TOKEN
        - name: KUBELET_HOST
          valueFrom:
            fieldRef:
              fieldPath: spec.nodeName
        volumeMounts:
        - name: sys
          mountPath: /rootfs/sys
          readOnly: true
        - name: proc
          mountPath: /rootfs/proc
          readOnly: true
        - name: docker-socket
          mountPath: /var/run/docker.sock
          readOnly: true
        - name: utmp
          mountPath: /var/run/utmp
          readOnly: true
        - name: config
          mountPath: /etc/telegraf
      terminationGracePeriodSeconds: 30
      volumes:
      - name: sys
        hostPath:
          path: /sys
      - name: docker-socket
        hostPath:
          path: /var/run/docker.sock
      - name: proc
        hostPath:
          path: /proc
      - name: utmp
        hostPath:
          path: /var/run/utmp
      - name: config
        configMap:
          name: telegraf

You'll also need to create the secret INFLUX_TOKEN, optionally with another YAML:

apiVersion: v1
kind: Secret
metadata:
  name: telegraf
  namespace: kube-system
data:
  # printf "somevar" | base64
  INFLUX_TOKEN: aGEgaGEsIG5pY2UgdHJ5LiBObyBzZWNyZXQgZm9yIHlvdS4=