Kubernetes GitOps with Flux

Source: Dev.to

Create a GitHub Personal Access Token

1. Open a new browser tab and go to github.com.
2. Sign in (or create a new account).
3. Click your avatar in the upper‑right corner → Settings.
4. In the left‑hand menu select Developer settings → Personal access tokens.
5. Click Generate a personal access token.
6. If prompted, re‑enter your password and confirm.
7. Under Note, enter a descriptive name (e.g., acg-flux-lab).
8. Under Select scopes, check the repo box.
9. Click Generate token and copy the generated token.

Bootstrap the Git Repository

On the lab server, run the following command, replacing “ with your GitHub username:

flux bootstrap github \
  --owner= \
  --repository=acg-flux-lab \
  --branch=main \
  --path=./clusters/my-cluster \
  --personal

• This creates a new GitHub repository named acg-flux-lab.
• When prompted, paste the personal access token you generated earlier.

Visit https://github.com//acg-flux-lab to verify that the repository was created.

YAML Manifest

Below is the example manifest that will be added to the repository:

Create a Deployment via the GitHub Repository Using Flux

1. In the acg-flux-lab repository on GitHub, click Add files → Create new file.
2. Set the path to clusters/my-cluster/turtle-deployment.yaml.
3. Paste the following YAML into the editor:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: turtle-deployment
  namespace: default
spec:
  replicas: 3
  selector:
    matchLabels:
      app: turtle
  template:
    metadata:
      labels:
        app: turtle
    spec:
      containers:
        - name: nginx
          image: nginx:stable

4. Commit the new file directly to the main branch.

After Flux reconciles the repository, verify the resources:

kubectl get pods
kubectl get deployments

Reference

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