Setup Flux GitOps Operator in Azure

Flux is an open-source continuous delivery tool designed to automate Kubernetes application deployments using GitOps. It runs as a set of controllers inside Kubernetes cluster that continuously monitor connected Git repositories for changes.

Setup prerequisites:

• GitHub repo
• Azure Kubernetes cluster

Setup steps:

• Navigate to the cluster in Azure portal and then go to Settings -> GitOps
• Select Create

Enter GitOps details:

• Configuration name: ex. aks-gitops
• Namespace: ex. flux-namespace (namespace should match the namespace defined in Kubernetes deployment file)
• Scope: in this example let’s use Namespace
• Select Next

In the Source section:

• In Source type (Source kind), select Git Repository
• Repository URL: path to the repo
• Reference type: Branch
• Branch: Enter branch name (usually master but any test repo can be used as well)
• In this example let’s use Private repo
• HTTP User: enter your GitHub username
• HTTP Key: Generate private access token in GitHub and paste it here
• Set sync interval and timeout to desired minutes
• Click Next

In the Kustomization section:

• Create kustomization, let’s name it gitops-test
• Inside GitHub project repo, create folder git-ops folder and inside that folder create kustomization file (kustomization.yml). This file will list resource files (deployment, services).

apirVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
resources:
    - gitops-test.depoloyment.yml

• Set the path to the kustomization file, e.g. ./gitops-test (which is folder name created before with kustomization file in it)
• Click Create to create Flux configuration in Azure.

Once configuration is initiated, Azure might take some time to perform configuration (around 7-10 minutes).

Potential issues:

• Non-Compliant status message.
• Image pulling from Container registry.
• Auth to Azure services.