GEPP - Developer's Helper to K8s

GEPP takes your app and Dockerize it, sets up a Kubernetes cluster and runs your app in it, configure K8s resources and produce Terraform file for Azure deployments, and more! All are happening in seconds!

How and Why

Requirements:

• Running Docker
• main.py file
• app variable for WYSGI

Run:

docker run -it --rm -v /var/run/docker.sock:/var/run/docker.sock -v $PWD:/project -e PROJECT_NAME=${PWD##*/} guray/gepp:0.1-alpha3

GEPP provides developers to easily run their apps as containerized apps in Kubernetes. Here is what it is aiming:

• You run the tool in a directory with Python/Go/NodeJS code
• It will generate a Dockerfile depending on the framework your code uses
• It will generate YAMLs for Kubernetes deployment, pod autoscaling, service definitions (it will ask some questions like service type) + ingress
• (optional) It can generate a plan for Terraform for your cloud provider for a K8s cluster and deploying your app (in JSON, using tfcdk)
• (optional) It will insert environment variable, secretmap, configmaps to the generated YAML (interactively asks) - WIP
• (optional) It can get storageclasses from your cluster and define some storage and insert it to your YAML - WIP
• (optional) It can generate servicemonitor and podmonitor YAML files for Prometheus operator - WIP
• (optional) It can generate network policies for some of the network providers - WIP

It is mostly a repetitive task to Dockerize your project and generating YAMLs that look like ones in other projects/microservices. In addition to replaying the same steps, it may easily consume a lot of time to set up to Dockerize your app, write YAMLs for Kubernetes deployment(and define resources), configure autoscheduler, write Ingress manifests for L7 routing/LB, create Kubernetes services etc. After all of these, you should deploy a Kubernetes cluster, either locally or on a remote target; than connect to it, upload & deploy your app.

GEPP is being developed to shorten these procedures to a fully(or mostly) automatic, yet useful process. Just run gepp inside a directory and wait for your localhost-port pair to connect your app.

For interactively using GEPP run gepp -i or gepp --interactive. (Currently works for only additional ports)

You will find Dockerfile, .dockerignore, Kubernetes YAMLS, AKS definition for deploying it with Terraform in your directory.

Status

Currently, it is in 0.1-alpha stage. It should work without any problems but has not tested in wild, nor all the intended features has been implemented yet. If you are encountering a problem, please open an issue.

PR's are more than welcome!

The proposal of this project consists of these steps:

• Auto detect Flask or other frameworks
• Generate Dockerfile if not exists
• Create Deployment YAML
• Create autoscaler YAML
• Create service (type optional, clusterip default)
• Create ingress definition (optional)
• Deploy to K8s (optional)
• Test with port-forward
• Generate Terraform file for K8s integration + GKE/AWS/Azure/...
• Ask secret usage, getting names from K8s (optional)
• Ask disk type, size, mountpoint (optional)
• Create local cluster with kind/minikube/k3d and deploy the app onto it
• Use skaffold/telepresence to provide a complete dev environment
• Get status, logs, metrics
• Ask metric exports
• Re-running should be possible, and it should check the YAMLs and other files to be idempotent