Currently experimenting with services interconnection inside kubernetes
- Prepare kubernetes cluster(docker desktop for mac already has on, you should only go to setting and turn in on)
- Build the api container image(but change repository in justfile before, so you won't use mine)
just build-http-api
- Publish image to docker hub(i wasn't been able to make k8s work with locally stored images)
docker push whatever/http-api
- Edit image name in container spec in deployment/api.yaml
- Apply manifests to the cluster
kubectl apply -f deployment/redis.yaml
kubectl apply -f deployment/api.yaml
Note that http-api connects to redis via redis.default.svc.cluster.local - this is the examples of dns service discovery enabled by default in recent kubernetes versions
- Check http-api externals
kubectl get svc http-api-service
You will see something like that:
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
http-api-service LoadBalancer 10.109.226.134 localhost 8080:31763/TCP 12s
You can navigate to http://localhost:8080/docs and try api yourself and see it working(use /set with key hello and value world, then verify it with /get and key hello)
- Optionally - expose Redis(by adding
type: LoadBalancerinto redis.yaml service definition) and connect to redis with some gui client to see that http-api indeed places keys with values