How to deploy a node.js with redis on kubernetes?

Question

I have a very simple node.js application (HTTP service), which \"talks\" to redis. I want to create a deployment and run it with minikube.

From my understanding, I n

Answer 1

I would run redis in a separate pod (i.e.: so your web app doesn't take down the redis server if itself crashes).

Here is your redis deployment & service:

deployment.yaml:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: redis
spec:
  selector:
    matchLabels:
      app: redis
  replicas: 1
  template:
    metadata:
      labels:
        app: redis
    spec:
      volumes:
        - name: host-sys
          hostPath:
            path: /sys
      initContainers:
        - name: disable-thp
          image: redis:4.0-alpine
          volumeMounts:
            - name: host-sys
              mountPath: /host-sys
          command: ["sh", "-c", "echo never > /host-sys/kernel/mm/transparent_hugepage/enabled"]
      containers:
      - name: redis
        image: redis:4.0-alpine
        imagePullPolicy: IfNotPresent
        resources:
          requests:
            cpu: 350m
            memory: 1024Mi
        ports:
        - containerPort: 6379

service.yaml:

apiVersion: v1
kind: Service
metadata:
  name: redis
  labels:
    app: redis
spec:
  ports:
  - port: 6379
    name: redis
  selector:
    app: redis

Since we've exposed a kubernetes Service you can then access your redis instance by hostname, or it's "service name", which is redis.

You can check out my kubernetes redis repository at https://github.com/mateothegreat/k8-byexamples-redis. You can simply run make install if you want the easier route.

Good luck and if you're still stuck please reach out!