ArgoCD: Monitoring, Logging, and Troubleshooting

ArgoCD Metrics and Monitoring (Prometheus and Grafana)#

ArgoCD provides metrics that can be collected using Prometheus and visualized in Grafana.

Enabling Prometheus Metrics in ArgoCD#

Prometheus scrapes ArgoCD metrics and provides insights into application health and sync status.

Deploying Prometheus in a Kubernetes Cluster#

kubectl apply -f https://raw.githubusercontent.com/prometheus-operator/prometheus-operator/main/bundle.yaml

Exposing ArgoCD Metrics#

kubectl port-forward svc/argocd-metrics -n argocd 8082:8082

Configuring Grafana Dashboards for ArgoCD#

• Import the ArgoCD Grafana Dashboard.
• Connect Prometheus as a data source in Grafana.

Logging ArgoCD Deployments#

Viewing Real-Time ArgoCD Logs#

kubectl logs -n argocd -l app.kubernetes.io/name=argocd-server

Storing Logs Using Fluentd, Loki, or Elasticsearch#

Setting Up Loki for Centralized Logging#

kubectl apply -f https://raw.githubusercontent.com/grafana/loki/main/deploy/kubernetes/loki.yaml

Configuring Fluentd to Forward ArgoCD Logs#

<match argocd.**>
  @type loki
  url http://loki.default.svc:3100
</match>

Viewing Logs in Grafana’s Loki UI#

Logs can be queried and visualized using Loki’s integration with Grafana.

Debugging and Troubleshooting Common Issues#

Checking ArgoCD Application Status#

argocd app get myapp

Debugging Sync Failures#

argocd app history myapp

Resolving Network and Access Issues#

kubectl get events -n argocd

Using ArgoCD CLI to Troubleshoot#

argocd app logs myapp

Auditing Application Changes#

Viewing Audit Logs of Application Changes#

argocd app history myapp

Tracking User Actions in ArgoCD UI#

ArgoCD logs all user interactions and changes within the UI.

Integrating with SIEM Tools for Compliance Monitoring#

• Use external security monitoring tools to track ArgoCD activities.

Hands-On Exercise#

1. Deploy and configure Prometheus to monitor ArgoCD.
2. Enable Grafana dashboards for ArgoCD metrics.
3. Set up Loki for centralized logging.
4. Debug a failing application sync using ArgoCD logs.

By implementing monitoring and logging, you gain better visibility into ArgoCD’s behavior and improve troubleshooting efficiency.