/AKS_KVS_ETCD

Install an Scalable ETCD database in Azure Kubernetes Service

Primary LanguagePython

How did I created the kubernetes cluster

  • Created a Kubernetes cluster in Azure 
    az aks create --resource-group <resource_group_name> --name <cluster_name> --location "Central India" --node-count <node_count> --node-vm-size <vm_size> --enable-addons monitoring
  • Configured my localmachine with az cmd using 
    az aks get-credentials --resource-group <resource-group-name> --name <cluster-name>
  • Connected it with my cluster (Verified it using kubectl get nodes)
  • Installed helm to deploy the etcd database in my cluster 
    helm install my-etcd oci://registry-1.docker.io/bitnamicharts/etcd
  • Created an Azure Container Registry and pushed the image 
    cd src
docker build -t my-fastapi-app:<version-no> .
docker tag my-fastapi-app:<version-no> <acr-name>.azurecr.io/my-fastapi-app:<version-name>
docker push <acr-name>.azurecr.io/my-fastapi-app:<version-name>
  • Connect to the ACR 
    az acr login --name <acr-name>
  • Connect the cluster with the ACR 
    az aks update -n <cluster-name> -g <resource-group-name> --attach-acr <acr-name>

The cluster is setup now we need to deploy the deployments and the service (so it can be accessed outside the cluster)

Note : We need to have kubectl installed in the local-machine

cd manifests
kubectl apply -f create_pvc.yaml (using azure file managed service for faster processing we can use the premium services too)
kubectl apply -f create_deployment.yaml
kubectl get deployments

Now we need to create the service

kubectl apply -f create_service.yaml
kubectl get svc

Please note the external IP

Now in a browser put http://xx.xx.xx.xx:80/docs

We will be able to see the documentation image

How to test in post

Setup of the local development environment

```
docker pull quay.io/coreos/etcd

docker run -d --name my-etcd -p 2379:2379 -p 2380:2380 quay.io/coreos/etcd:latest /usr/local/bin/etcd --advertise-client-urls http://0.0.0.0:2379 --listen-client-urls http://0.0.0.0:2379 --initial-advertise-peer-urls http://0.0.0.0:2380 --listen-peer-urls http://0.0.0.0:2380 --initial-cluster-token etcd-cluster-1 --initial-cluster my-etcd=http://0.0.0.0:2380 --initial-cluster-state new

docker run -d --name my-etcd -p 2379:2379 -p 2380:2380 -e ETCD_ADVERTISE_CLIENT_URLS=http://localhost:2379 -e ETCD_ROOT_PASSWORD=<your_password> bitnami/etcd:latest
```

Locally check if the setup is successfull

etcdctl --endpoints=localhost:2379 --user root --password <your_password> endpoint health

In the main.py file replace this

username = os.getenv('ETCD_USERNAME')
password = os.getenv('ETCD_PASSWORD')
etcd_client = Etcd3Client(host='my-etcd.default.svc.cluster.local', port=2379, user=username, password=password)

with

etcd_client = Etcd3Client(host='127.0.0.1', port=2379, user='root', password=<your-password>)