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Flux

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FluxCD is deployed on my Talos Kubernetes node to adopt a GitOps approach to deploying applications on Kubernetes. My GitHub repository is the source of truth for Kubernetes applications I have deployed.

What is GitOps?

GitOps is a way of managing your infrastructure and applications so that whole system is described declaratively and version controlled (most likely in a Git repository), and having an automated process that ensures that the deployed environment matches the state specified in a repository.

Source.

Prerequisite

Install the flux CLI:

brew install fluxcd/tap/flux

Deploying the Flux Controllers

Abstract

  1. Export the GitHub PAT:

    export GITHUB_TOKEN=<Insert token here>

  2. Deploy the Flux controllers:

    flux bootstrap github \
    --token-auth \
    --cluster-domain=cluster.net.dbren.uk \
    --owner=dbrennand \
    --repository=home-ops \
    --branch=main \
    --path=kubernetes/flux \
    --personal

  3. Verify that the Flux controllers are reconciled and deployed successfully:

    flux check

Upgrading Flux

  1. Upgrade the flux CLI:

    brew install fluxcd/tap/flux

  2. Update the Flux manifest:

    flux install --export > ./kubernetes/flux/flux-system/gotk-components.yaml

  3. Commit and push the changes:

    git add ./kubernetes/flux/flux-system/gotk-components.yaml
git push

  4. Force flux to upgrade immediately:

    flux reconcile ks flux-system --with-source