How to deploy on Kubernetes

This example shows how to deploy to Kubernetes using the base opentopodata docker image. It includes a workload (ingress.yml) configuration and a service (service.yml) configuration which is used to access the opentopodata API by routing queries to the container.

Prerequisites

You need access to a K8s cluster and in this example we are using the command-line-interface kubectl to deploy. For instructions on how to do that visit the K8s website.

Example

Assuming you have a domain, subdomain.example.com where you want to make the opentopodata available on the endpoint subdomain.example.com/dem-api/, the files deployment.yml, ingress.yml and service.yml shows how to set that up. It works out of the box with the base opentopodata docker image.

Simply run these commands:

kubectl --namespace my-namespace apply -f service.yml
kubectl --namespace my-namespace apply -f ingress.yml
kubectl --namespace my-namespace apply -f deployment.yml

service.yml

apiVersion: v1
kind: Service
metadata:
  name: dem-api
  labels:
    service: dem-api
spec:
  selector:
    deploy: dem-api
  ports:
    - port: 5000
      targetPort: 5000

ingress.yml

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: dem-api
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /$1
    nginx.ingress.kubernetes.io/ssl-redirect: "false"
spec:
  rules:
  - host: subdomain.example.com
    http:
      paths:
      - path: /dem-api/(.*)
        backend:
          serviceName: dem-api
          servicePort: 5000

deployment.yml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: dem-api
spec:
  replicas: 1
  selector:
    matchLabels:
      deploy: dem-api
  template:
    metadata:
      labels:
        deploy: dem-api
    spec:
      containers:
        - image: opentopodata
          name: dem-api
          imagePullPolicy: Always
          ports:
            - containerPort: 5000

      restartPolicy: Always