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#### General
##### Check the Repo content
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 is container orchestration and what are its benefits?
- What is Kubernetes and what is its main role?
- What are K3s and what is their main role?
###### Did the student reply correctly to the questions?
##### Check the Student Documentation
The Documentation must exist in the `README.md` file!
###### Did the README.md file contains all the required information about the solution (prerequisites, configuration, setup, usage, ...)?
##### Check the docker images in the Docker Hub:
###### Are the docker images used in the YAML manifest uploaded from the student's Docker Hub account?
##### Check the cluster:
By using K3s in Vagrant two 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
$>
```
###### Was the cluster created by a Vagrantfile?
###### Does the cluster contains two nodes (master and agent)?
###### Is kubectl installed and configured in the learner's machine?
###### Are the nodes connected and ready for usage?
##### Check the student infrastructure:
The student must implement this architecture:
![architecture](../pictures/Architecture.png)
##### Run the student infrastructure:
```console
user:~$ ./orchestrator.sh create
cluster created
user:~$
```
###### Did the student provide an `orchestrator.sh` script that runs and creates and manages 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 existing in the YAML manifests, except the secret manifests?
##### Ask the following questions to the group or student
- What is infrastructure as code and what are the advantages of it?
- Explain What is a K8s manifest.
- Explain the K8s manifests.
###### Did the student reply correctly to the questions?
##### Check the secrets
```console
$> kubectl get secrets -o json
<...>
$>
```
###### Are all the used credentials and passwords present in the secrets?
##### Check all deployed resources:
```console
user:~$ 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`.
###### Are all the required applications 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 trigger: 60%
2. `billing-app`:
max replication: 3
min replication: 1
cpu percent trigger: 60%
3. `inventory-app`:
max replication: 3
min replication: 1
cpu percent trigger: 60%
###### Do all apps deploy 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 the difference between deployment and StatefulSet in K8s?
- What is scaling and why do we use it?
- What is a load balancer and what is its role?
- 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?
#### K8s components
![suprise](../pictures/suprise.png)
![components-of-kubernetes](../pictures/components-of-kubernetes.svg)
In less than 15 minutes and with the help of Google the student must explain all Kubernetes components and their roles.
###### Can the learner explain the K8s components in less than 15 minutes?
#### Bonus
###### +Did the student add any optional bonus?
###### +Is this project an outstanding project?