apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: alloy
  namespace: cicd
  finalizers:
    - resources-finalizer.argocd.argoproj.io
spec:
  project: default
  source:
    repoURL: https://grafana.github.io/helm-charts
    chart: alloy
    targetRevision: 0.3.2
    helm:
      releaseName: alloy
      valuesObject:
        alloy:
          service:
            ports:
              otlp-grpc:
                enabled: true
                port: 4317
                targetPort: 4317
                protocol: TCP
              otlp-http:
                enabled: true
                port: 4318
                targetPort: 4318
                protocol: TCP

          configMap:
            content: |
              discovery.kubernetes "pods" {
                role = "pod"
              }

              discovery.relabel "pods" {
                targets = discovery.kubernetes.pods.targets

                rule {
                  source_labels = ["__meta_kubernetes_namespace"]
                  target_label  = "namespace"
                }

                rule {
                  source_labels = ["__meta_kubernetes_pod_name"]
                  target_label  = "pod"
                }

                rule {
                  source_labels = ["__meta_kubernetes_pod_container_name"]
                  target_label  = "container"
                }

                rule {
                  source_labels = ["__meta_kubernetes_pod_label_app"]
                  target_label  = "app"
                }
              }

              loki.source.kubernetes "pods" {
                targets    = discovery.relabel.pods.output
                forward_to = [loki.write.default.receiver]
              }

              loki.write "default" {
                endpoint {
                  url = "http://loki.monitoring.svc.cluster.local:3100/loki/api/v1/push"
                }
              }

              // ========================================
              // TRACES COLLECTION
              // ========================================

              // OTLP receiver for traces via gRPC and HTTP
              otelcol.receiver.otlp "default" {
                grpc {
                  endpoint = "0.0.0.0:4317"
                }

                http {
                  endpoint = "0.0.0.0:4318"
                }

                output {
                  traces = [otelcol.processor.batch.default.input]
                }
              }

              // Batch processor for efficient trace forwarding
              otelcol.processor.batch "default" {
                timeout = "5s"
                send_batch_size = 100
                send_batch_max_size = 200

                output {
                  traces = [otelcol.exporter.otlp.tempo.input]
                }
              }

              // OTLP exporter to send traces to Tempo
              otelcol.exporter.otlp "tempo" {
                client {
                  endpoint = "tempo.monitoring.svc.cluster.local:4317"

                  tls {
                    insecure = true
                  }

                  compression = "gzip"
                }
              }

  destination:
    server: https://kubernetes.default.svc
    namespace: monitoring

  syncPolicy:
    automated:
      prune: true
      selfHeal: true
    syncOptions:
      - CreateNamespace=false
    retry:
      limit: 3
      backoff:
        duration: 5s
        factor: 2
        maxDuration: 1m