ArgoCD Real-World Implementation Scenarios
ArgoCD Real-World Implementation Scenarios Multi-Cluster Management Setting Up Multi-Cluster Architecture apiVersion: argoproj.io/v1alpha1 kind: Application metadata: name: multi-cluster-app namespace: argocd spec: destination: server: https://kubernetes.default.svc namespace: production project: default source: path: kustomize/overlays/production repoURL: https://github.com/your-org/gitops targetRevision: HEAD syncPolicy: automated: prune: true selfHeal: true Cross-Cluster Synchronization Managing dependencies Cluster registration Resource propagation Network configuration Hybrid Cloud Deployments Cloud Provider Integration AWS EKS Configuration Azure AKS Setup GCP GKE Implementation On-premises Integration Network Considerations Cross-cloud connectivity Service mesh integration Load balancing Security groups Microservices Orchestration Application Definition apiVersion: argoproj.io/v1alpha1 kind: ApplicationSet metadata: name: microservices namespace: argocd spec: generators: - list: elements: - service: auth namespace: auth-system - service: payment namespace: payment-system template: metadata: name: '{{service}}' spec: project: microservices source: repoURL: https://github.com/your-org/{{service}} targetRevision: HEAD path: kubernetes destination: server: https://kubernetes.default.svc namespace: '{{namespace}}' Service Dependencies Dependency graphs Startup order Health checks Rollback strategies Production Best Practices High Availability Setup Multiple replicas Pod anti-affinity Network redundancy Backup strategies Scaling Strategies apiVersion: autoscaling/v2 kind: HorizontalPodAutoscaler metadata: name: application-hpa spec: scaleTargetRef: apiVersion: apps/v1 kind: Deployment name: my-app minReplicas: 3 maxReplicas: 10 metrics: - type: Resource resource: name: cpu target: type: Utilization averageUtilization: 70 Compliance and Security Audit Logging apiVersion: v1 kind: ConfigMap metadata: name: argocd-cm namespace: argocd data: application.resourceTrackingMethod: annotation resource.customizations: | argoproj.io/Application: health.lua: | hs = {} hs.status = "Progressing" hs.message = "" return hs Security Measures Network policies Pod security policies Secret management Access controls Disaster Recovery Backup Configuration # Backup ArgoCD state argocd admin export > argocd-backup.yaml # Backup application configurations kubectl get applications -n argocd -o yaml > applications-backup.yaml # Backup secrets kubectl get secrets -n argocd -o yaml > secrets-backup.yaml Recovery Procedures Infrastructure recovery Data restoration Application reconciliation Validation checks Performance Optimization Resource Management CPU/Memory tuning Storage optimization Network throughput Cache configuration Monitoring Setup apiVersion: monitoring.coreos.com/v1 kind: ServiceMonitor metadata: name: argocd-metrics spec: selector: matchLabels: app.kubernetes.io/name: argocd-metrics endpoints: - port: metrics Case Studies E-Commerce Platform Microservices architecture Blue-green deployments Canary releases A/B testing Financial Services Compliance requirements Security measures Audit trails Zero-downtime updates SaaS Application Multi-tenant setup Resource isolation Scalability patterns Monitoring solutions Troubleshooting Guide Common Issues Sync failures Resource conflicts Network problems Authentication issues Debug Procedures # Check application status argocd app get <app-name> # View detailed sync status argocd app sync <app-name> --debug # Check controller logs kubectl logs -n argocd -l app.kubernetes.io/name=argocd-application-controller Multi-Cluster Management Extended Guide Cluster Addition Workflow # Add new cluster to ArgoCD argocd cluster add <context-name> # Verify cluster connection argocd cluster list # Test cluster access argocd app list --dest-server <cluster-url> Multi-Cluster Sync Strategies Sequential Deployment apiVersion: argoproj.io/v1alpha1 kind: Application metadata: name: multi-cluster-app namespace: argocd annotations: argocd.argoproj.io/sync-wave: "1" # Control sync order spec: project: default source: repoURL: https://github.com/your-org/gitops path: kustomize/base targetRevision: HEAD destination: server: https://kubernetes.default.svc namespace: production Parallel Deployment apiVersion: argoproj.io/v1alpha1 kind: ApplicationSet metadata: name: parallel-deploy namespace: argocd spec: generators: - clusters: {} # Deploy to all connected clusters template: metadata: name: '{{name}}-app' spec: project: default source: repoURL: https://github.com/your-org/gitops path: kustomize/base destination: server: '{{server}}' namespace: production Cluster-Specific Configurations Environment Overrides apiVersion: argoproj.io/v1alpha1 kind: Application metadata: name: cluster-specific-app spec: source: repoURL: https://github.com/your-org/gitops path: kustomize/base kustomize: namePrefix: dev- commonLabels: environment: development Homelab-Specific Considerations Resource Optimization Limited Resources Setup apiVersion: v1 kind: ResourceQuota metadata: name: argocd-quota namespace: argocd spec: hard: requests.cpu: "2" requests.memory: 2Gi limits.cpu: "4" limits.memory: 4Gi Network Optimization apiVersion: networking.k8s.io/v1 kind: NetworkPolicy metadata: name: argocd-network-policy namespace: argocd spec: podSelector: matchLabels: app.kubernetes.io/part-of: argocd ingress: - from: - namespaceSelector: matchLabels: name: monitoring Local Storage Configuration Local Path Provisioner apiVersion: storage.k8s.io/v1 kind: StorageClass metadata: name: local-path provisioner: rancher.io/local-path volumeBindingMode: WaitForFirstConsumer Advanced Use Cases Blue-Green Deployments apiVersion: argoproj.io/v1alpha1 kind: Application metadata: name: blue-green-app spec: source: plugin: name: blue-green repoURL: https://github.com/your-org/gitops syncPolicy: automated: prune: true selfHeal: true Canary Deployments apiVersion: argoproj.io/v1alpha1 kind: Application metadata: name: canary-app annotations: argocd-image-updater.argoproj.io/image-list: app=your-org/app:latest spec: source: repoURL: https://github.com/your-org/gitops path: kustomize/overlays/canary Integration Examples Monitoring Stack apiVersion: argoproj.io/v1alpha1 kind: Application metadata: name: monitoring-stack spec: source: repoURL: https://github.com/prometheus-community/helm-charts targetRevision: HEAD helm: values: | grafana: enabled: true prometheus: enabled: true CI/CD Pipeline Integration apiVersion: argoproj.io/v1alpha1 kind: Application metadata: name: jenkins-integration spec: source: repoURL: https://github.com/your-org/jenkins-config path: kubernetes directory: recurse: true Troubleshooting Advanced Scenarios Multi-Cluster Issues # Check cluster connectivity argocd cluster get <cluster-url> # Verify cluster resources kubectl --context=<cluster-context> get nodes # Test application deployment argocd app sync <app-name> --dest-server <cluster-url> Sync Issues # Debug sync problems argocd app sync <app-name> --debug # Check resource health argocd app get <app-name> --refresh # View detailed sync status argocd app history <app-name> Performance Problems # Monitor sync performance argocd app list --output wide # Check resource utilization kubectl top pods -n argocd # View detailed metrics argocd admin metrics Best Practices Security Measures Implement network policies Use RBAC effectively Rotate credentials regularly Enable audit logging High Availability Multiple replicas Pod anti-affinity Resource limits Backup strategies Monitoring Prometheus integration Grafana dashboards Alert configuration Log aggregation Next Steps Return to the main guide or explore Integration Patterns. ...