Example values.yaml for Grafana Agent to scrape Pod logs from Kubernetes and ship to Loki

values.yaml

agent:
  mounts:
    varlog: true
  configMap:
    content: |
      logging {
        level  = "info"
        format = "logfmt"
      }

      discovery.kubernetes "k8s" {
        role = "pod"
      }

      discovery.relabel "k8s" {
        targets = discovery.kubernetes.k8s.targets

        rule {
          source_labels = ["__meta_kubernetes_pod_name"]
          action = "replace"
          target_label = "pod"
        }
        rule {
          source_labels = ["__meta_kubernetes_pod_container_name"]
          action = "replace"
          target_label = "container"
        }

        rule {
          source_labels = ["__meta_kubernetes_namespace", "__meta_kubernetes_pod_label_name"]
          target_label  = "job"
          separator     = "/"
        }

        rule {
          source_labels = ["__meta_kubernetes_pod_uid", "__meta_kubernetes_pod_container_name"]
          target_label  = "__path__"
          separator     = "/"
          replacement   = "/var/log/pods/*$1/*.log"
        }
      }

      local.file_match "pods" {
        path_targets = discovery.relabel.k8s.output
      }

      loki.source.file "pods" {
        targets = local.file_match.pods.targets
        forward_to = [loki.write.endpoint.receiver]
      }

      loki.write "endpoint" {
        endpoint {
            url = "http://loki-gateway:80/loki/api/v1/push"
            tenant_id = "cloud"
        }
      }