Conductor

Conductor is an API responsible of directing the deployments with k8s

Is in charge of:

• Receive a .tar.gz with the project to deploy
• Building & publishing the dockerfile image in the project
• Deploy a Pod exposing the project ports
• Manage DNS of each project

PoC

This is a PoC for a deployment systeme similar to now. It was a 1day lab in order to get ideas on how to improve the nodejs deployment.

Main goal

The main goal of this project is to beat the deployment time of our current deploy system

Second class goals

• Able to be used in some simple use cases like demos
• Simple deployment, 0 configuration
• App auto scaling

Final goal

The final goal of this project, when it's not a PoC anymore, will be to be able to handle the requests of the NodeJS SSR server

Dev

Deps

Since we are on a PoC just install everything from master:

go get \
k8s.io/client-go/kubernetes \
k8s.io/client-go/rest \
k8s.io/client-go/kubernetes/typed/apps/v1beta2 \
k8s.io/api/apps/v1beta2 \
k8s.io/api/core/v1 \
k8s.io/client-go/kubernetes/typed/core/v1 \
k8s.io/apimachinery/pkg/apis/meta/v1 \
github.com/docker/docker/client \
github.com/docker/docker/api/types \
github.com/gin-gonic/gin \
k8s.io/apimachinery/pkg/util/intstr

Build

We use the in-cluster client. So in order to test this you should have minikube.

to build & deploy in k8s

./dev/start.sh

Usage:

curl $(minikube service conductor --url)/ping

When done

./dev/stop.sh

Testing deployment

The example folder is a simple nodejs app. You can use it to test the deployment

cd example/ && tar -zcvf ../example.tar.gz . && cd ..

Create a deployment

curl -X POST $(minikube service conductor --url)/deploy \
  -F "file=@example.tar.gz" \
  -H "Content-Type: multipart/form-data"

And test your app

curl $(minikube service example --url)/

TODO

• Improve port detection, now you can only bound to :8080
• Expose the service, now you must do it manually kubectl expose deployment example --type=LoadBalancer
• Use random project names instead of the file name, avoid clash
• Allow registering custom domain names to a specific deployment
• Maybe K8s Jobs is a better way to coordinate build - deploy