For deploying influxdb and grafana together in kubernetes

influxdb-grafana-deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: ifg-deployment
  namespace: house-infra
  labels:
    app: ifg
spec:
  replicas: 1
  selector:
    matchLabels:
      app: ifg
  template:
    metadata:
      labels:
        name: ifg-pod
        namespace: house-infra
        app: ifg
    spec:
      containers:
      - name: grafana
        image: grafana/grafana
        ports:
        - containerPort: 3000

        volumeMounts:
        - mountPath: /var/lib/grafana
          name: grafana-volume

      - name: influxdb
        image: quay.io/influxdb/influxdb:v2.0.3
        ports:
        - containerPort: 8086

        volumeMounts:
        - mountPath: /root/.influxdbv2
          name: influxdb-volume

      volumes:
      - name: grafana-volume
        hostPath:
              path: /opt/grafana/
              type: DirectoryOrCreate
      - name: influxdb-volume
        hostPath:
          path: /opt/influxdb/db/influxdbv2
          type: DirectoryOrCreate

influxdb-grafana-service.yaml

kind: Service
apiVersion: v1
metadata:
    name: ifg-service
    namespace: house-infra
spec:
    type: NodePort
    selector:
        app: ifg
    ports:
    - protocol: TCP
      name: grafana-web-interface
      port: 3000
      nodePort: 40000
    - protocol: TCP
      name: influxdb-interface
      port: 8086
      nodePort: 8086

You will need to exec into your influxdb pod and follow the standard setup instructions for influxdb.

You will also need to configure grafana yourself: https://docs.influxdata.com/influxdb/v2.0/tools/grafana/?t=InfluxQL#configure-your-influxdb-connection