This repository contains a simple golang service which serves a single endpoint: /:id. For each call to this endpoint, the service increments a counter, and returns the number of times the endpoint has been called for the given ID. State for the application is stored in and retrieved from redis, where the data is stored simply with id as the key, and the count as the value.
In your solution, include a readme containing the necessary steps to set up the environment, as well as to build, package and deploy the application. Also detail and explain your chosen architecture, as well as what tools were used in the deployment process.
- Helm to package the kubernetes resources
- Kubernetes to host the microservices
- ingress to handle traffic into the cluster
- service to route the traffic through the cluster
- deployment to manage deployment of the pods
- HPA to handle autoscalling
- secrets to handle sensitive data (redis password)
- Minikube for local Kubernetes development
- Docker to build and publish the images
docker build . -t <name:tag>
docker push <name:tag>kubectl create namespace api --dry-run=client -o yaml | kubectl apply -f -
helm repo add bitnami https://charts.bitnami.com/bitnami
helm repo add metrics-server https://kubernetes-sigs.github.io/metrics-server
helm repo update metrics-server
helm install redis bitnami/redis -n api
helm upgrade --install api ./infra/api -n apiTested on minikube v1.27.1, Darwin 12.4, Kubernetes v1.25.2, Docker 20.10.18
minikube start
minikube addons enable ingress
minikube addons enable ingress-dns
minikube ip
kubectl create namespace api --dry-run=client -o yaml | kubectl apply -f -
helm repo add bitnami https://charts.bitnami.com/bitnami
helm repo add metrics-server https://kubernetes-sigs.github.io/metrics-server
helm repo update metrics-server
helm install redis bitnami/redis -n api
helm upgrade --install api ./infra/api -n apidocker run --rm -it --name dev-env \
-e PORT=9000 \
-e REDIS_PASSWORD=$REDIS_PASSWORD \
-e PORT=9000 \
-e REDIS_HOST=127.0.0.1 \
-e REDIS_PORT=6379 \
-e REDIS_DB=0 \
-e GO111MODULE=on \
-p 9000:9000 \
-v $PWD:/app/server \
--network=host \
-w /app/server \
golang:1.14
go mod download && \
go build
./devops-techtask Get the redis password:
export REDIS_PASSWORD=$(kubectl get secret --namespace redis my-release-redis -o jsonpath="{.data.redis-password}" | base64 -d)
kubectl port-forward --namespace default svc/my-release-redis-master 6379:6379 &
REDISCLI_AUTH="$REDIS_PASSWORD" redis-cli -h 127.0.0.1 -p 6379redis client:
apt update -y && \
apt install lsb-release -y && \
curl -fsSL https://packages.redis.io/gpg | gpg --dearmor -o /usr/share/keyrings/redis-archive-keyring.gpg && \
echo "deb [signed-by=/usr/share/keyrings/redis-archive-keyring.gpg] https://packages.redis.io/deb $(lsb_release -cs) main" | tee /etc/apt/sources.list.d/redis.list && \
apt-get update -y && \
apt-get install redis -y
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