Getting started with Gefyra and kind

This guide will show you how to use Gefyra for the local development of a Kubernetes application running in kind.

Prerequisites

Follow the installation for your preferred platform.
Create a local Kubernetes cluster with kind like this: Create a file kind-config.yaml:

kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
- role: control-plane
  extraPortMappings:
  - containerPort: 31820
    hostPort: 31820
    protocol: udp

Run:

kind create cluster --config kind-config.yaml

Running Gefyra

Set up Gefyra with
```
gefyra up
```
Run a local Docker image with Gefyra in order to make it part of the cluster.
1. Build your Docker image with a local tag, for example from the testing directory: cd testing/images/ && docker build -f Dockerfile.local . -t pyserver
2. Execute Gefyra’s run command:
```
gefyra run -i pyserver -N mypyserver -n default
```
3. Exec into the running container and look around. You will find the container to run within your Kubernetes cluster.
```
docker exec -it mypyserver bash
```
```
wget -O- hello-nginx
```
  will print out the website of the cluster service hello-nginx from within the cluster.
Create a bridge in order to intercept the traffic to the cluster application with the one running locally:
```
gefyra bridge -N mypyserver -n default --port 8000:80 --target deploy/hello-nginxdemo/hello-nginx
```
Check out the locally running server comes up under: http://hello.127.0.0.1.nip.io:8080/
List all running bridges:
```
gefyra list --bridges
```
Unbridge the local container and reset the cluster to its original state:
```
gefyra unbridge -N mypybridge
```
Check out the initial response from: http://hello.127.0.0.1.nip.io:8080/

Cleaning up

Remove Gefyra’s components from the cluster with
```
gefyra down
```
Remove the locally running Kubernetes cluster with kind delete cluster