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About

Simple example - How to install and configure Argocd in kubernetes cluster and deploy sample nodejs app.

requirements

  1. Docker Installed.
  2. Rancher Desktop - https://rancherdesktop.io .
  3. kubectl if not installed .

1.Install Argo CD into K8s cluster .

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

Kubernetes manifests can be :

  • kustomize applications
  • helm charts
  • ksonnet applications
  • jsonnet files
  • Plain directory of YAML/json manifests
  • Any custom config management tool configured as a config management plugin

in this guide i will use Kubernetes mainfest files .

2.Access Argocd Dashborad via Port Forwarding.

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

The API server can then be accessed using the http://localhost:8080

3.Get argocd Dashborad password .

kubectl -n argocd get secret argocd-initial-admin-secret -o jsonpath="{.data.password}" | base64 -d; echo
OFj9zupMWoCUu6nu

Alt text

4.Deploy a Sample app using Argocd .

git clone https://github.com/same7ammar/argocd-starter-example.git
kubeclt apply -f application.yml
application.argoproj.io/first-argo-application created

check the app in Argocd dashborad .

Alt text

$ kubectl get pods -n web-app
NAME                              READY   STATUS    RESTARTS   AGE
nodejs-web-app-6fdf6d4f54-7drlz   1/1     Running   0          29m

$ kubectl get svc
NAME             TYPE           CLUSTER-IP      EXTERNAL-IP      PORT(S)          AGE
nodejs-web-app   LoadBalancer   10.43.240.254   172.17.152.146   3000:30043/TCP   7s
to test service use  curl http://EXTERNAL-IP:PORT
$ curl http://172.17.152.146 
Hello World

Build a simple pipeline .

  1. create a github repo under your user name .
  2. copy application.yml and app folder to your repo .
  3. edit application.yml .
apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: first-argo-application
  namespace: argocd
spec:
  project: default

  source:
    repoURL:  https://yourgitrepo
    targetRevision: HEAD
    path: app # mainfest folder in your repo
  destination: 
    server: https://kubernetes.default.svc
    namespace: web-app  # namespace for your app .
  1. deploy application.yml using kubectl .
kubectl apply  -f application.yml
  1. push a new version of your app ie. edit
      containers:
        - name: nodejs-web-app
          image: same7ammar/node-web-app-k8s:v1

Check your argocd dashborad , new version show be avaiable .

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

License

MIT