A Practical Guide to Kubernetes/

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Merging Everything into the Same YAML Definition

Merging Everything into the Same YAML Definition

Merge all the definitions we’ve explored until now into a single YAML file and then create objects using that file.

We'll cover the following...

Looking into the merged file

Consider this lesson as a connective tissue. We’ll merge the definitions we used in this chapter into a single YAML file. We’ve already discussed a similar example before, so there’s no need for lengthy explanations.

Let’s look at the definition of go-demo-2.yml:

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apiVersion: apps/v1
kind: Deployment
metadata:
  name: go-demo-2-db
  labels:
    type: db
    service: go-demo-2
    vendor: MongoLabs
spec:
  selector:
    matchLabels:
      type: db
      service: go-demo-2
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        type: db
        service: go-demo-2
        vendor: MongoLabs
    spec:
      containers:
      - name: db
        image: mongo:3.3
---
apiVersion: v1
kind: Service
metadata:
  name: go-demo-2-db
spec:
  ports:
  - port: 27017
  selector:
    type: db
    service: go-demo-2
---
apiVersion: apps/v1beta2
kind: Deployment
metadata:
  name: go-demo-2-api
  labels:
    type: api
    service: go-demo-2
    language: go
spec:
  replicas: 3
  selector:
    matchLabels:
      type: api
      service: go-demo-2
  template:
    metadata:
      labels:
        type: api
        service: go-demo-2
        language: go
    spec:
      containers:
      - name: api
        image: vfarcic/go-demo-2
        env:
        - name: DB
          value: go-demo-2-db
        readinessProbe:
          httpGet:
            path: /demo/hello
            port: 8080
          periodSeconds: 1
        livenessProbe:
          httpGet:
            path: /demo/hello
            port: 8080
---
apiVersion: v1
kind: Service
metadata:
  name: go-demo-2-api
spec:
  type: NodePort
  ports:
  - port: 8080
  selector:
    type: api
    service: go-demo-2

Differences with previous definitions

If you start searching for differences with the ...