DevPill #3: How to deploy a container to your Kubernetes cluster (GKE)

Source: Dev.to

Deployment Manifest

apiVersion: apps/v1
kind: Deployment
metadata:
  name: api-gateway
spec:
  replicas: 1
  selector:
    matchLabels:
      app: api-gateway
  template:
    metadata:
      labels:
        app: api-gateway
    spec:
      containers:
        - name: api-gateway
          image: us-central1-docker.pkg.dev///api-gateway
          ports:
            - containerPort: 8081
          resources:
            requests:
              memory: "128Mi"
              cpu: "125m"
            limits:
              memory: "128Mi"
              cpu: "125m"
          env:
            # Accessing an env variable from the app-config config map
            - name: GATEWAY_HTTP_ADDR
              valueFrom:
                configMapKeyRef:
                  name: app-config
                  key: GATEWAY_HTTP_ADDR
            - name: JAEGER_ENDPOINT
              valueFrom:
                configMapKeyRef:
                  name: app-config
                  key: JAEGER_ENDPOINT

Service Manifest

apiVersion: v1
kind: Service
metadata:
  name: api-gateway
spec:
  type: LoadBalancer
  ports:
    - port: 8081
      targetPort: 8081
  selector:
    app: api-gateway

Deploy to GKE

• Access Google Cloud Console and create your GKE cluster (this might take a while).

• Retrieve cluster credentials:

  gcloud container clusters get-credentials  --region us-central-1 --project 

• Upload the manifests:

  kubectl apply -f infra/production/k8s/app-config.yaml
  kubectl apply -f infra/production/k8s/secrets.yaml
  kubectl apply -f infra/production/k8s/api-gateway-deployment.yaml

• Check the status of the deployments:

  kubectl get deployments
  kubectl get pods