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

1. Specify the deployment.yaml file. Example:
   

   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/<project-id>/<repository-name>/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:
                   key: GATEWAY_HTTP_ADDR
                   name: app-config
             - name: JAEGER_ENDPOINT
               valueFrom:
                 configMapKeyRef:
                   key: JAEGER_ENDPOINT
                   name: app-config
   

---

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

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

2. Execute the following command:
   gcloud container clusters get-credentials <cluster-id> --region us-central-1 --project <project-id>

3. Upload the manifests. Example:
   

   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
   

If you want to check the status of the deployments try the following commands:

kubectl get deployments
kubectl get pods