"Vamo Dale" Slack slash command

Little project for Magrathea Labs Slack workspace that works like the following:

A person types /dale slash command
The app returns a gif of a person doing a "Dale" hand movement.

It is being hosted on AWS and using the EC2 resource. All the infra configuration is done with Terraform; the file data.ft contains the needed data, in specific the default VPC and default subnet where the instance will be launched; main.tf has the configuration for the EC2 instance and the security group attached to it. Only connections via ssh, port 22, and http, port 80, are allowed with the instance.

Dependencies
Setup
Development
Deploy
Kubernetes

Dependencies

Python 3.x
Terraform (for deploy)

Setup

After cloning it, install the dependencies with pip3 install -r requirements.txt

Development

Start the server with python3 app.py

Get a gif

To get a dale gif, make the following request

curl -X POST localhost:5000/dale_gif

It should return something similar to the snippet below

{
  "response_type": "in_channel",
  "attachments": [{
    "title": "Vamo dale",
    "image_url": "https://media.giphy.com/media/8FGM7VT9bre1TqKRds/giphy.gif"
  }]
}

Register a gif

First upload your dale gif to Giphy and get its id. For example, the following gif url, ´https://media.giphy.com/media/8FGM7VT9bre1TqKRds/giphy.gif`, has the id as 8FGM7VT9bre1TqKRds

With the id, make the following request:

curl -X POST localhost:5000/register_dale_gif -d '{"gif_id": "8FGM7VT9bre1TqKRds"}' -H "content-type: application/json"

Deploy

Make sure you've got /.aws/credentials setup with your AWS secret access key and access key, then, execute the following

terraform init
terraform plan (not necessary but nice to double check the changes)
terraform apply

Kubernetes

This application is my pet project for Kubernetes. There are the following structures (inside /kubernetes folder):

web-deployment.yml creates a deployment with 3 replicas, each with a single container running the python application and exposing port 5000.
web-svc.yml creates a NodePort service for the pods created above, allowing them to be accessed externally via the node IP and the pod port defined in this service.
db-statefulset.yml creates a statefulset for Redis in order to maintain state if its pods are restarted.
db-svc.yml creates a service for the redis pod created above.

To test it locally:

Install minikube and kubectl
Start minikube with minikube start
Check the cluster if alright with kubectl cluster-info
If yes, then create the following objects

kubectl create -f web-deployment.yml -f web-svc.yml -f db-statefulset.yml -f db-svc.yml

Check that they were created with kubectl get pods. kubectl get svc and kubectl get deployments
Now make a POST request to this service, first get the node's IP (Kubernetes master) with kubectl cluster-info and the service's port with kubectl get svc (search for the web service and for the exposed port between 30000-32767). For example: curl -X POST 192.168.99.100:31321/dale_gif

danielSbastos/dale-slack-tf