The Hot Potatoe Challenge - A swarm of microservices to Kubernetes, in an hour.
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.

The Hot Potato Challenge - A Go and Kubernetes Hacknight

You're invited to come hack together a network of micro-services. We will:

  • Build a micro-service from scratch, however you want.
    • Push it to Docker hub (create an account if needed)
  • You'll be given keys to a Kubernetes cluster (install kubectl from here).
    • Deploy to Kubernetes (using the sample service.yaml and deployment.yaml in this repo).
      • Use kubectl create -f service.yaml -f deployment.yaml
  • We'll network all our micro-services:
    • Your service will call other folks's services (implementing the API below) creating a ginormous pipeline of text processing.
      • Ex: my process upper-cases its inputs, your process maps each word to a Tweet, etc..
  • We'll see what gets created by calling each service.

API to implement

POST /process

{"text": "text",
 "history": [
    {"node": "user1", "text": "hello-world", "desc": "We upper-cased the hell out of it"},

Should output:

{"text": "new_text",
 "history": [
    {"node": "user1", "text": "hello-world"},
    {"node": "latest-call", "text": "new_text"},

Always add your "text" reply to the history before returning, along with your hostname (or some other debug messages, for tracing).

Golang base code

type Potato struct {
    Text    string  `json:"text"`
    History []Entry `json:"history"`

type Entry struct {
    Node string `json:"node"`
    Text string `json:"text"`
    Desc string `json:"desc"`

Kubernetes configuration

Download the kube-potato file from the organizer. Place it somewhere safe. Run:

curl -O http://[organizer's-ip]:8000/kube-potato
export KUBECONFIG=`pwd`/kube-potato

You're all set.

To the organizer

Start a GCP Kubernetes cluster, the size you want.


KUBECONFIG=/tmp/kube-potato gcloud container clusters get-credentials [NAME OF YOUR CLUSTER] --zone [ZONE] --project [PROJECT NAME]

(just prefix KUBECONFIG=/tmp/kube-potato to the command GCP gives you).

Share the /tmp/kube-potato file with participants.

You can share your local directory with:

python3 -m http.server

Find your IP and ask people to:

curl -O http://[your-ip]:8000/kube-potato