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https://github.com/ananya2001-an/kubernetes-demo
Learn how to deploy a MERN app to K8s☸️
https://github.com/ananya2001-an/kubernetes-demo
devops docker express kubernetes minikube mongodb mongoose react
Last synced: about 2 months ago
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Learn how to deploy a MERN app to K8s☸️
- Host: GitHub
- URL: https://github.com/ananya2001-an/kubernetes-demo
- Owner: Ananya2001-an
- Created: 2023-09-22T19:13:10.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2024-01-28T06:49:51.000Z (11 months ago)
- Last Synced: 2024-11-01T21:51:23.318Z (about 2 months ago)
- Topics: devops, docker, express, kubernetes, minikube, mongodb, mongoose, react
- Homepage:
- Size: 6.84 KB
- Stars: 5
- Watchers: 1
- Forks: 4
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
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README
## Deploy MERN App To K8s (Minikube)
The [kubernetes](kubernetes) folder consists of all the config files needed to deploy a MERN app on a simple K8s cluster like Minikube (1 node).
- Source code for the frontend app (react app) could be found [here](https://github.com/Ananya2001-an/note).
- Source code for the server (express app) could be found [here](https://github.com/Ananya2001-an/note-server).
### Steps
1. Clone repo on your local machine. Change directory to `kubernetes`.
2. Make sure you have Minikube installed and running properly.
3. You can use a Kubernetes IDE like "Lens" to connect to your Minikube cluster. Makes it easier for monitoring changes.
4. Now first create the secret. (Holds mongodb admin username and password)
```bash
kubectl apply -f secrets/mongodb-secret.yml
```
5. Later create the mongodb stateful set. It will create 2 replicas.
```bash
kubectl apply -f stateful-sets/mongodb-stateful-set.yml
```
6. Now create the mongodb internal service so that our server can later access the mongodb pods using it.
```bash
kubectl apply -f services/mongodb-service.yml
```
7. Now deploy the server app by running:
```bash
kubectl apply -f deployments/note-server-depl.yml
```
If everything is working properly you would able to see the message **connected to DB** in the server pod logs.
8. Now create the server internal service for communication between the frontend and the backend.
```bash
kubectl apply -f services/note-server-service.yml
```
9. Deploy frontend:
```bash
kubectl apply -f deployments/note-depl.yml
```
10. Create external service for the frontend app (Load Balancer) by running:
```bash
kubectl apply -f services/note-service.yml
```
11. To get an external IP assigned to the frontend deployment you can run:
```bash
minikube service note-service
```
12. Open the IP adddress in browser and you will be able to see the app running!
13. If you want to run a database GUI like `mongo-express`, you can simply run:
```bash
kubectl apply -f deployments/mongo-express-depl.yml
```
14. Later create mongo-express external service for acccessing the GUI in browser:
```bash
kubectl apply -f services/mongo-express-service.yml
minikube service mongo-express-service
```
### Resources needed
- Docker
- Minikube
- Kubectl
- Lens: K8s IDE (Recommended)