argocd_github_actions_project/
 ├─ src/...
 ├─ Dockerfile
 ├─ pom.xml
 └─ deploymentfiles/
      └─ deployment.yml   # Kubernetes Deployment + Service

In Repository → Settings → Secrets and variables → Actions → New repository secret, add:

curl -o kubectl https://amazon-eks.s3.us-west-2.amazonaws.com/1.19.6/2021-01-05/bin/linux/amd64/kubectl
chmod +x ./kubectl
sudo mv ./kubectl /usr/local/bin
kubectl version --short --client
curl --silent --location "https://github.com/weaveworks/eksctl/releases/latest/download/eksctl_$(uname -s)_amd64.tar.gz" | tar xz -C /tmp
sudo mv /tmp/eksctl /usr/local/bin

kubectl create namespace argocd 

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

kubectl patch svc argocd-server -n argocd -p '{"spec": {"type": "LoadBalancer"}}' 

kubectl get svc argocd-server -n argocd 

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

1. Repo Settings → Actions → General → Workflow permissions
2. Select “Read and write permissions” and save.

Create file: .github/workflows/cicd.yml

https://github.com/jadalaramani/argocd_github_actions_project/blob/main/.github/workflows/cicd.yaml

In the Argo CD web UI:

1. + New App
2. Name: my-app
3. Repo URL: https://github.com/jadalaramani/argocd_github_actions_project.git
4. Path: deploymentfiles
5. Cluster URL: https://kubernetes.default.svc
6. Namespace: default
7. Create.
8. Optionally set Sync Policy → Automatic so deployments happen without manual clicks.

1. Developer pushes code to main.

2. GitHub Actions:

   • Builds JAR/WAR with Maven.
   • Builds Docker image ramanijadala/webapp:<run_number>.
   • Pushes to Docker Hub.
   • Replaces :tag in deployment.yml with that run number.
   • Commits the updated manifest back to the repository.

3. Argo CD detects the Git change and deploys the updated image to EKS.

4. Pods in EKS pull the exact image tag and run.

• GitHub Actions Logs: should show the new image tag and a successful commit.
• GitHub Repo: deployment.yml contains ramanijadala/webapp:<number>.
• Docker Hub: new tag appears.
• Argo CD UI: Application health = Healthy, pods running with the correct image.

• 403 push error: confirm “Read and write permissions” enabled and GITHUB_TOKEN env is present.
• ImagePullBackOff: check that deployment.yml really contains the latest numeric tag and that the image exists in Docker Hub.
• Namespace errors: ensure Destination namespace is default (no spaces).