casa/services/monitoring/deploy/alloy/alloy-loki-examples copy.config

      // ============================================
      // LOKI WRITE TARGET
      // ============================================
      loki.write "loki_srv" {
        endpoint {
          url = env("LOKI_URL")
        }
      }

      // ============================================
      // POD LOGS: DISCOVERY + RELABEL
      // ============================================

      // Discover Kubernetes pods
      discovery.kubernetes "pod_logs" {
        role = "pod"
      }

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

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

        rule {
          source_labels = ["__meta_kubernetes_pod_name"]
          regex        = "^(.+?)-[0-9a-zA-Z]{4,16}(?:-[0-9a-zA-Z]{4,16})?$"
          replacement  = "$1"
          target_label = "pod"
        }

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

        rule {
          source_labels = ["__meta_kubernetes_node_name"]
          target_label  = "node_name"
        }

        rule {
          source_labels = [
            "__meta_kubernetes_pod_controller_name",
          ]
          regex        = "([0-9a-z-.]+?)(-[0-9a-f]{8,10})?"
          target_label = "controller_name"
        }

        rule {
          source_labels = [
            "__meta_kubernetes_pod_label_app_kubernetes_io_name",
            "__meta_kubernetes_pod_label_app",
            "controller_name",
            "__meta_kubernetes_pod_name",
          ]
          regex        = "^;*([^;]+)(;.*)?$"
          target_label = "app"
        }

        rule {
          source_labels = [
            "__meta_kubernetes_pod_label_app_kubernetes_io_component",
            "__meta_kubernetes_pod_label_component",
          ]
          regex        = "^;*([^;]+)(;.*)?$"
          target_label = "component"
        }

        rule {
          source_labels = ["namespace", "app"]
          separator     = "/"
          target_label  = "job"
        }

        rule {
          source_labels = ["job", "container"]
          separator     = ":"
          target_label  = "instance"
        }
        rule {
          source_labels = ["__meta_kubernetes_pod_node_name"]
          separator     = ":"
          target_label  = "host"
        }
      }


      // ============================================
      // POD LOGS: SOURCE → PROCESS → WRITE
      // ============================================

      // Tail logs from Kubernetes pods
      loki.source.kubernetes "pod_logs" {
        // targets    = discovery.kubernetes.pod_logs.targets
        targets    = discovery.relabel.pod_logs.output
        forward_to = [loki.process.pod_logs.receiver]
      }

      // Add static labels and forward logs to Loki
      loki.process "pod_logs" {

        stage.static_labels {
          values = {
            cluster = env("CLUSTER_NAME"),
            zone    = env("ZONE"),
          }
        }

        forward_to = [loki.write.loki_srv.receiver]
      }

      // ============================================
      // KUBERNETES EVENTS
      // ============================================

      // Tail Kubernetes events and convert them to log entries
      loki.source.kubernetes_events "cluster_events" {
        job_name   = "integrations/kubernetes/eventhandler"
        log_format = "logfmt"
        forward_to = [
          loki.process.cluster_events.receiver,
        ]
      }

      // Add static labels and forward events to Loki
      loki.process "cluster_events" {
        forward_to = [loki.write.loki_srv.receiver]

        stage.static_labels {
          values = {
            cluster = env("CLUSTER_NAME"),
            host    = "env("CLUSTER_NAME")",
            job     = "cluster_events",
            zone    = env("ZONE"),
          }
        }

      }