Niklas Tech Blog

Wiremock is a great tool for many things and especially black box testing. I’m here going to show a small and simple way to setup a Wiremock implementation in Kubernetes

First we need a Deployment of the Wiremock application:

# Deploy wiremock to Kubernetes
apiVersion: apps/v1
kind: Deployment
metadata:
  name: wiremock
  labels:
    app: wiremock
spec:
  replicas: 1
  selector:
    matchLabels:
      app: wiremock
  template:
    metadata:
      labels:
        app: wiremock
    spec:
      containers:
        - name: wiremock
          image: rodolpheche/wiremock
          ports:
            - containerPort: 8080
          volumeMounts:
            - name: mappings
              mountPath: /home/wiremock/mappings
            - name: files
              mountPath: /home/wiremock/__files
      volumes:
        - name: mappings
          configMap:
            name: wiremock-mappings
        - name: files
          configMap:
            name: wiremock-files

Then we need a Service to expose Wiremock to the cluster

apiVersion: v1
kind: Service
metadata:
  name: wiremock
spec:
    selector:
        app: wiremock
    ports:
        - protocol: TCP
          port: 8080
          targetPort: 8080

Two ConfigMaps for configuration and files:

apiVersion: v1
kind: ConfigMap
metadata:
  name: wiremock-mappings
data:
    mappings.json: |
        {
            "request": {
                "method": "GET",
                "url": "/api/v1/hello"
            },
            "response": {
                "status": 200,
                "bodyFileName": "hello.json",
                "headers": {
                    "Content-Type": "application/json"
                }
            }
        }
        
---

apiVersion: v1
kind: ConfigMap
metadata:
  name: wiremock-files
data:
    hello.json: |
        {
        "Hello": "World"
        }
        

And finally a call to the mock to see that everything works as expected:

 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: check-wiremock
  labels:
    app: check-wiremock
spec:
    replicas: 1
    selector:
        matchLabels:
          app: check-wiremock
    template:
        metadata:
          labels:
            app: check-wiremock
        spec:
          containers:
            - name: check-wiremock
              image: cosmintitei/bash-curl
              imagePullPolicy: Always
              command: ["/bin/sh", "-c", "while true; do date; curl -sS wiremock:8080/api/v1/hello; sleep 10; done"]

You should now see the payload from the Wiremock application every ten second in the check-wiremock applications log

Tested in Minikube v1.29.0