A `README.md` and `orchestrator.sh` and `Vagrantfile` files and all files used to create and delete and manage the student infrastructure must be submitted in the repo.
```console
.
├── Manifests
│ └── [...]
├── Scripts
│ └── [...]
├── Dockerfiles
│ └── [...]
└── Vagrantfile
```
###### Are all the required files present?
##### Ask the following questions to the group or student
- What are Container orchestration and what are their benefits of it?
- What are Kubernetes and what is its main role of it?
- What are K3s and what is its main role of it?
###### Did the student reply correctly to the questions?
##### Check the Student Documentation
The Documentation must exists in the `README.md` file!
###### Did the README.md file contains the all required information about the solution(Prerequisites, Configuration, Setup, Usage, ...)?
##### Check the docker images in dockerhub:
###### Does the used docker images in the YAML manifests must be uploaded in the student dockerhub account?
##### Check the cluster:
By using k3s in Vagrant 2 virtual machines must be created:
1. Master: the master in the k3s cluster.
2. Agent: an agent in the k3s cluster.
`kubectl` must be installed and configured in the learner machine to manage the cluster.
The nodes must be connected and available, try:
```console
$> kubectl get nodes -A
NAME STATUS ROLES AGE VERSION
<master-node> Ready <none> XdXh vX
<agent1-node> Ready <none> XdXh vX
$>
```
###### Does the cluster created by a Vagrantfile?
###### Does the cluster contains 2 nodes (master and agent)?
###### Does kubectl installed and configured in the learner machine
###### Does the nodes is connected and ready for usage?
###### did the student provide a `orchestrator.sh` script that run and create and manage the infrastructure
###### did the student respect the architecture?
###### did the infrastructure start correctly?
##### Verify the K8s Manifests:
###### Is there a YAML Manifest for each service?
###### Are credentials not exists in the YAML manifests, except the secret manifests?
##### Ask the following questions to the group or student
- Explain What is a K8s manifest
- Explain the K8s manifests
- Did the student reply correctly to the questions?
###### Did the student reply correctly to the questions?
##### Check the secrets
```console
$> kubectl get secrets -o json
<...>
$>
```
###### Is the all used credentials and passwords presented in the secrets?
##### Check all deployed resources:
```console
user:~$ kubectl get all
<...>
user:~$
```
-`inventory-database container` is a PostgreSQL database server that contains your inventory database, it must be accessible via port `5432`.
-`billing-database container` is a PostgreSQL database server that contains your billing database, it must be accessible via port `5432`.
-`inventory-app container` is a Node.Js server that contains your inventory-app code running and connected to the inventory database and accessible via port `8080`.
-`billing-app container` is a Node.Js server that contains your billing-app code running and connected to the billing database and consuming the messages from the RabbitMQ queue, and it can be accessed via port `8080`.
-`RabbitMQ container` is a RabbitMQ server that contains the queue.
-`api-gateway-app container` is a Node.Js server that contains your api-gateway-app code running and forwarding the requests to the other services and it's accessible via port `3000`.
###### Did the all required applications is deployed?
- databases must be deployed as Statefulset, and volumes that enable containers to move across infrastructure without losing the data must be created.
- Node.JS applications must be deployed as a deployment and they must be scaled horizontally automatically, depending on CPU consumption:
1.`api-gateway`:
max replication: 3
min replication: 1
cpu percent triger: 60%
2.`billing-app`:
max replication: 3
min replication: 1
cpu percent triger: 60%
3.`inventory-app`:
max replication: 3
min replication: 1
cpu percent triger: 60%
###### Do all apps deployed with the correct configuration?
##### Ask the following questions to the group or student
- What is statefulset in k8s?
- What is deployment in k8s?
- What is difference between deployment and statefulset in k8s?
- What is scaling and why we use it?
- What is a load balancer and what is the role of it?
- Why we don´t put the database as a deployment?
###### Did the student reply correctly to the questions?
##### Test The solution
#### Inventory API Endpoints
##### Open Postman and make a `POST` request to `http://[GATEWAY_IP]:[GATEWAY_PORT]/api/movies/` address with the following body as `Content-Type: application/json`:
```json
{
"title": "A new movie",
"description": "Very short description"
}
```
###### Can you confirm the response was the success code `200`?
##### In Postman make a `GET` request to `http://[GATEWAY_IP]:[GATEWAY_PORT]/api/movies/` address.
###### Can you confirm the response was success code `200` and the body of the response is in `json` with the information of the last added movie?
#### Billing API Endpoints
##### Open Postman and make a `POST` request to `http://[GATEWAY_IP]:[GATEWAY_PORT]/api/billing/` address with the following body as `Content-Type: application/json`:
```json
{
"user_id": "20",
"number_of_items": "99",
"total_amount": "250"
}
```
###### Can you confirm the response was success code `200`?
##### Stop the billing-app container
###### Can you confirm the `billing-app` container was correctly stopped?
##### Open Postman and make a `POST` request to `http://[GATEWAY_IP]:[GATEWAY_PORT]/api/billing/` address with the following body as `Content-Type: application/json`:
```json
{
"user_id": "22",
"number_of_items": "10",
"total_amount": "50"
}
```
###### Can you confirm the response was success code `200` even if the `billing_app` is not working?
