Dad Joke Generator 🤣

This project is a Dad Joke Generator that uses the OpenAI GPT-3 API to generate the funniest dad jokes you've ever heard! The application is built using Go and is composed of a joke-server, joke-worker, Redis, MongoDB, and NATS.

Table of Contents 📚

• Architecture
• Prerequisites
• Deployment
• License

Architecture 🏗️

The application consists of the following components:

1. joke-server: A web server that listens for incoming HTTP requests and returns a dad joke.
2. joke-worker: A background worker that communicates with the OpenAI GPT-3 API, generates dad jokes, caches them in Redis, and stores them in MongoDB.
3. Redis: A caching layer that temporarily stores generated dad jokes.
4. MongoDB: A NoSQL database that permanently stores generated dad jokes.
5. NATS: A messaging system that facilitates communication between the joke-server and joke-worker.

Prerequisites ⚙️

Before you can deploy the Dad Joke Generator, you'll need the following:

• Docker and Docker Compose installed on your machine
• An OpenAI API key
• Access to a Kubernetes cluster, helm and kubectl installed if you want to deploy the application on Kubernetes
• gpg command-line available

Deployment 🚀

Docker Compose (Local) 🐳

To deploy the Dad Joke Generator, follow these steps:

1. Clone the repository:

git clone https://github.com/vfiftyfive/dadjokes.git
cd dadjokes/deploy/docker

2. Create a .env file in the dadjokes/deploy/docker directory, with your OpenAI API key:

echo "OPENAI_API_KEY=your_api_key_here" > .env

3. Run the deployment script:

cd ../..
make deploy

4. Generate a lot of jokes!

for i in {1..30}; do curl http://localhost:8080/joke; echo -e; done

The last 10 jokes should come a lot faster than the first 20, as the joke-worker will retrieve jokes from the Redis cache after that, for a time defined in constants.RedisTTL.

Kubernetes ☸

1. Clone the repository and change the directory to deploy/devspace:

git clone https://github.com/vfiftyfive/dadjokes.git
cd dadjokes/deploy/devspace

2. Install DevSpace:

# AMD64
curl -L -o devspace "https://github.com/loft-sh/devspace/releases/latest/download/devspace-linux-amd64" && sudo install -c -m 0755 devspace /usr/local/bin

# ARM64
curl -L -o devspace "https://github.com/loft-sh/devspace/releases/latest/download/devspace-linux-arm64" && sudo install -c -m 0755 devspace /usr/local/bin

3. Install SOPS:

ORG="mozilla"
REPO="sops"
latest_release=$(curl -Ls "https://github.com/repos/${ORG}/${REPO}/releases/latest" | grep '"tag_name":' | sed -E 's/.*"v([^"]+)".*/\1/')

# AMD64
curl -L https://github.com/mozilla/sops/releases/download/v${latest_release}/sops_${latest_release}_amd64.deb -o sops.deb && sudo apt-get install ./sops.deb && rm sops.deb

# ARM64
curl -L https://github.com/mozilla/sops/releases/download/v${latest_release}/sops_${latest_release}_arm64.deb -o sops.deb && sudo apt-get install ./sops.deb && rm sops.deb

4. Generate a GPG key:

gpg --gen-key
#answer the questions

5. Create a SOPS configuration file:

first_pgp_key=$(gpg --list-secret-keys --keyid-format LONG | grep -m1 '^sec' | awk '{print $2}' | cut -d '/' -f2)

cat <<EOF > .sops.yaml
creation_rules:
- encrypted_regex: "^(data|stringData)$"
  pgp: >-
    ${first_pgp_key}
EOF

6. Create an encrypted Kubernetes ConfigMap with your OpenAI API key:

First, create an OPENAI_API_KEY environment variable and configure it with your OpenAI API key.

devspace run encrypt-openai-secret

4. Specify a namespace to use with DevSpace

devspace use namespace dev

5. Run devspace in dev mode

devspace dev

6. Generate a lot of jokes:

First, expose the joke-server pod or service using port forwarding.

kubectl -n dev port-forward svc/joke-server 8080:80

Then, execute the following command:

for i in {1..10}; do curl http://localhost:8080/joke; echo -e; done

7. Modify the code

Your local repository is synchronized with the project files within the joke-worker pod. Modify the file internal/joke/joke.go and change the code so the joke generated is now a Chuck Norris joke. Replace the line:

Prompt: "Tell me a dad joke"

With the line:

Prompt: "Tell me a Chuck Norris joke"

Then save the file. The joke-worker pod will automatically recompile and restart the binary. Now, when you run the curl command again, you should see a Chuck Norris joke instead of a dad joke (provided you have generated less than 20 jokes, as the program will retrieve jokes from the Redis cache after that, for a time defined in constants.RedisTTL):

for i in {1..10}; do curl http://localhost:8080/joke; echo -e; done

License 📄

This project is licensed under the Apache 2.0 License - see the LICENSE file for details.