summer-camp

An application task for the summer-camp by kiwi.com. Made to be extended wth other microservices in the future. Assumes you have a kubectl context configured for a project that has kubernetees support activated.

Pre-requisites

Install:

google-cloud-sdk
kubectl
terraform (v0.11.14) - you can use tfswitch to manage those
install the dependancies - I suggest using docker-compose up from the root repository for local development of services.

On MacOs:

cat <<-"BREWFILE" > Brewfile
cask 'google-cloud-sdk'
brew 'kubectl'
brew 'terraform'
BREWFILE
brew bundle --verbose

Usage:

Specify the GCP app to be used for the

export TF_VAR_project="$(gcloud config get-value project -q)"
export TF_VAR_region="us-east1-b"
export TF_VAR_user="admin" 
export TF_VAR_password="" // put some random password in
export DOCKER_HUB_USER="" // provide your username

Provide default gcp authorizaton creds: just one of the ways

export GOOGLE_APPLICATION_CREDENTIALS="" -path to creds in json format

Deployment - won't work without the step above as make is making use of some of the variables

It will push to two image hosting repositories for now. Both gcp - requried for the terraform build on gcp and docker hub - to allow for public image sharing.

cd summer_app
make build

Initialize terraform & deploy the app to kubernetes onto the context provided in the cli context.

terraform init
terraform plan
terraform apply

Check service addresses - granted you have the same context configured.

kubectl get service

Development:

recommended: run the app with docker-compose up from the root of the project. Mind you it will take a while to build if there are more microservces present.

Available endpoints:

Locally:

curl -d '{"payload":"bazinga"}' -H "Content-Type: application/json" -X POST http://localhost:8800/create Should respond with approximately:

{
    "response": "Number of invocations for bazinga2, is exactly 1",
    "err": null
}

curl localhost:8800/health responds with:

{
    "ok": true
}

and status 200

Online: responds similarly to the above

curl -d '{"payload":"bazinga"}' -H "Content-Type: application/json" -X POST 35.227.104.181:80/create
curl 35.227.104.181:80/health

Get deployed instances & ip addresses

gcloud compute instances list
gcloud container clusters get-credentials ${cluster-name}
kubectl get services

Use the external ip provided in the output from the kubectl to connect to your newly created cluster.

Attributions:

Alex Pliutau @packagemain
go-kit creators
Joaquin Menchaca as their work many concepts use here much clearer to me.

jugglingjsons/summer-camp