https://hub.docker.com/r/bufferapp/buffer-log-collector-tester/

Dockerfile

FROM alpine:3.3
ADD logger.sh /logger.sh
RUN chmod +x /logger.sh
CMD /bin/sh -c "/logger.sh"

log-collector-test.yaml

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  namespace: default
  name: log-collector-test
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: log-collector-test
    spec:
      containers:
      - image: bufferapp/buffer-log-collector-tester:1
        name: app
        volumeMounts:
        - name: log-storage
          mountPath: /var/log
      - name: log-collector
        image: bufferapp/buffer-log-collector:0.2
        volumeMounts:
        - name: log-storage
          readOnly: true
          mountPath: /var/log
        resources:
          limits:
            cpu: 100m
            memory: 200Mi
      imagePullSecrets:
        - name: dhbufferapp
      restartPolicy: Always
      volumes:
      - name: log-storage
        emptyDir: {}

logger.sh

#!/bin/sh

HOSTNAME=$(hostname)

while true
do
  TIMESTAMP=$(date "+%Y-%m-%dT%H:%M:%S.000Z")

  ENTRY="{\
  \"name\": \"Log-Tester\",\
  \"hostname\": \"$HOSTNAME\",\
  \"@timestamp\": \"$TIMESTAMP\"\
  \"msg\": \"ok\"\
  }"
  echo $ENTRY >> /var/log/application.log
  echo $ENTRY

  METRIC="{\
  \"name\": \"Log-Tester\",\
  \"date\": \"$TIMESTAMP\"\
  \"value\": { \"something\": 1234 }\
  }"
  echo $METRIC >> /var/log/metrics.log
  echo $METRIC

  sleep 30
done