In this project, we have considered a use case where we are implementing Kubernetes Ingress.
In this exercise, we are creating a simple Flask app, dockerizing it and deploying it on GKE. Also, deploying a NGINX pod and using that to route the traffic to the python application pod.
1. Install kubectl.
$ sudo apt-get update && sudo apt-get install -y apt-transport-https gnupg2 curl
$ curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
$ echo "deb https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee -a /etc/apt/sources.list.d/kubernetes.list
$ sudo apt-get update
$ sudo apt-get install -y kubectl
2. Install Minikube.
- Commands to install Minikube in Linux. For more, click here.
$ curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
$ sudo install minikube-linux-amd64 /usr/local/bin/minikube
- To run Minikube, run the command
minikube start. If minikube fails to start, see the drivers page for help setting up a compatible container or virtual-machine manager. To check the status of Minikube, executeminikube status.
3. Enable the ingress addon in Minikube.
$ minkube addons list // List all the addons available on Minikube
$ minikube addons enable ingress // Enable the ingress addon on Minikube
| Step | Task | Status |
|---|---|---|
| 1. | Created the k8s deployment with nginx pod for serving traffic. | ✔️ |
| 2. | Configure the default.conf inside the nginx pod. | ✔️ |
| 3. | Create a k8s configmap using the default.conf file. | ✔️ |
| 4. | Created the k8s deployment for the simple Flask app. | ✔️ |
| 5. | Created a k8s Ingress (nginx) and set up the hostname. | ✔️ |
- Command for port forwarding.
$ kubectl port-forward service/python-service 5000:5000
- Command to create configMap in GKE with a file.
$ kubectl create configmap nginx-config --from-file=default.conf