Golang-Microservice.

A simple microservice written in Go with sweetness of Docker Containers & Kubernetes Orchestration.

1. Creating a simple go microservice.

 $ go mod init Golang-Microservice
 $ go build

Output is binary file Golang-Microservice

2. Containerizing Go Microservice on Docker.

Building docker image with Dockerfile:

$ docker build -t ducnv95/golang-rest-api:1.0 .
$ docker run -it -p 8000:8000 ducnv95/golang-rest-api:1.0

Verify

$ curl localhost:8000/people

Pushing the docker image on docker-hub:

$ docker login
$ docker push ducnv95/golang-rest-api:1.0

3. Deploying & Scaling Go microservice on Kubernetes.

Create pod:

# kubectl create -f k8s-pods.yml

Create deployment:

# kubectl create -f k8s-deployment.yml

Create service:

# kubectl create -f k8s-service.yml

Verify

# curl $(minikube service golang-microservice --url)/people

Roll-up, roll-back a deployment

# kubectl set image deployment.extensions/golang-microservice golang-microservice=ducnv95/golang-rest-api:2.0
# kubectl get pod,deploy,svc,rs -o wide
# kubectl describe deployment
# kubectl rollout history deployment.extensions/golang-microservice
# kubectl rollout undo deployment.extensions/golang-microservice --to-revision=1

Scaling a deployment

# kubectl scale deployment golang-microservice --replicas=4

Delete all

# kubectl delete all -l app=golang-microservice

Happy Learning!