https://github.com/gdamjan/k8s-leader-election-demo

Demo Leader Election with a Kubernetes Lease Object
https://github.com/gdamjan/k8s-leader-election-demo

demo kubernetes python

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Demo Leader Election with a Kubernetes Lease Object

• Host: GitHub
• URL: https://github.com/gdamjan/k8s-leader-election-demo
• Owner: gdamjan
• Created: 2024-10-31T04:33:51.000Z (19 days ago)
• Default Branch: main
• Last Pushed: 2024-10-31T04:36:01.000Z (19 days ago)
• Last Synced: 2024-10-31T05:22:43.993Z (19 days ago)
• Topics: demo, kubernetes, python
• Language: Python
• Homepage:
• Size: 0 Bytes
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Leader Election with a K8s Lease

## Quickstart

Build docker image:

```

podman build -t leader-election .

podman run -it --rm -p 8000:8000 leader-election

# push to local k3s registry

podman push --tls-verify=false leader-election registry.localhost/leader-election

```

## Testing on a local k3s

Apply the deployment to your Kubernetes cluster:

```

k3s kubectl apply -k k8s/

```

Verify the Lease: You can verify that the lease is created and check which pod holds the lease:

```

k3s kubectl get lease leader-lease -o yaml

```

Follow logs of all pods:

```

k3s kubectl logs -l app=leader-election --all-containers=true -f --max-log-requests 10

```

Run a pod with curl to access the web page:

```

k3s kubectl run curl -it --rm --image=quay.io/curl/curl-base:latest --command -- /bin/sh

# curl -v http://leader-election

# curl -v http://leader-election/crash -d 'crash random pod'

```