ArgoCD follows the GitOps pattern of using Git repositories as the source of truth for defining the desired application state. In other words, the ArgoCD automatically synchronize the cluster to the desired state defined in a Git repository.
Each workload is defined declarative through a resource manifest in a YAML file. Argo CD checks if the state defined in the Git repository matches what is running on the cluster and synchronizes it if changes were detected.
kubectl apply -f argocd-01-namespace.yaml
Next step is to change the namespace to the newly created namespace named argo cd.
kubectl config set-context --current --namespace=argocd
kubectl apply -f argocd-02-deployment.yaml
Alternative you can run the file published here (the above command is just using a copy of the official one):
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/master/manifests/install.yaml
Before we jump in to the next step we need to check that the pods are up and running, it could take a while before they are, run this command to check this.
kubectl get pods
This is how the result should look like:
NAME READY STATUS RESTARTS AGE
argocd-application-controller-0 1/1 Running 0 24s
argocd-applicationset-controller-5c7cfb9c5f-kps8d 1/1 Running 0 24s
argocd-dex-server-74cc9c9f78-5lhl2 1/1 Running 0 24s
argocd-notifications-controller-56bd7f7f9d-bzvbl 1/1 Running 0 24s
argocd-redis-79c755c747-7582l 1/1 Running 0 24s
argocd-repo-server-65c5b7899b-lhmw6 1/1 Running 0 24s
argocd-server-7db799b589-s8x5g 0/1 Running 0 24s
kubectl port-forward svc/argocd-server -n argocd 8080:443
kubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath="{.data.password}"
This will give you the password base64 encoded, you need do decode it with Linux command or C# or whatever you prefer. You could use the PowerCommandsClient command:
base64 --decode <encoded-password>
Login with username admin and the decoded password.
Navigate to settings -> Repositories and choose +Connect Repo
Easiest is to connect to a public Github repo, why not use this repo https://github.com/PowerCommands/KubernetesTutorials KubernetesTutorials using Via https method (you point out a directory later)
Use the +New App button, fill in the necessary info, witch is the path to the directory you want to sync, project name could be default sync policy manual cluster URL https://kubernetes.default.svc (it is a predefined value). If you have connected tho this repo the path to the SQL database manifest files is manifests/persistent-storage.
And then you will have your first ArgoCD application, as in this example, using the configuration files for the Persistent storage tutorial tutorial.
Special thanks to BogoToBogo
I have used this tutorial when writing this.