Setup GitOps with ArgoCD

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GitOps is a set of practices for managing infrastructure and application configurations to expand upon existing processes and improve the application lifecycle.
ArgoCD is a declarative, GitOps continuous delivery tool for Kubernetes. It does this by comparing the config repo to desired state.

Benefit¶

Declarative GtOps Tool
Kubernetes Native Continous Deployment
Disaster Recovery
Control Multiple Clusters

Prerequisites¶

Kubernetes
Configuration Repository

Here is the common pipeline that companies to use with ArgoCD

Setup ArgoCD¶

Create namespace and apply the argocd manifest installation file¶

kubectl create namespace argocd
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml

Access ArgoCD GUI¶

kubectl port-forward service/argocd-server -n argocd 8080:443

then goto localhost:8080

username: admin

to get password, you need to go back to command line and type

kubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath="{.data.password}" | base64 -d

now you will see the dashboard

Example¶

Now, I will show you how to use ArgoCD in a small helm chart project.
Usually, there are at least 2 repos for application and deployment.
In this example, I have a nodejs repo and a k8s repo.