monitoring: add alloy-kube-pod-logs-scraper

monitoring/base/alloy/kube-pod-logs-scraper/config.alloy

@@ -0,0 +1,104 @@
+logging {
+  level = "warn"
+}
+
+
+// ============================================
+// Discovery: Kubernetes - pods 
+// ============================================
+
+discovery.kubernetes "kube_pods" {
+  role = "pod"
+}
+
+// ============================================
+// Logs: Loki config
+// ============================================
+
+loki.write "loki_srv" {
+  endpoint {
+    url = sys.env("LOKI_URL")
+  }
+}
+
+loki.process "loki_srv" {
+  stage.static_labels {
+    values = {
+      cluster = sys.env("CLUSTER_NAME"),
+      zone    = sys.env("ZONE"),
+      job     = "integrations/kubernetes/pod-logs",
+    }
+  }
+  forward_to = [loki.write.loki_srv.receiver]
+}
+
+
+// ============================================
+// Loki.source  kube_pod_logs
+// Requirements: 
+//  - discovery.relabel: kube_pod_logs
+//  - discovery.process: loki_srv
+// ============================================
+
+loki.source.kubernetes "kube_pod_logs" {
+  targets    = discovery.relabel.kube_pod_logs.output
+  forward_to = [loki.process.loki_srv.receiver]
+}
+
+
+// ============================================
+// Discovery:relabel: kube_pod_logs
+// Requirements: 
+//  - discovery.kubernetes.role.pod: kube_pods
+// ============================================
+
+discovery.relabel "kube_pod_logs" {
+  targets = discovery.kubernetes.kube_pods.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  = "$1"
+    target_label = "pod"
+  }
+
+  rule {
+    source_labels = ["__meta_kubernetes_pod_container_name"]
+    target_label = "container"
+  }
+
+  rule {
+    source_labels = ["__meta_kubernetes_node_name"]
+    target_label  = "node_name"
+  }
+
+  rule {
+    source_labels = [
+      "__meta_kubernetes_pod_controller_name",
+    ]
+    regex        = "([0-9a-z-.]+?)(-[0-9a-f]{8,10})?"
+    target_label = "controller"
+  }
+
+  rule {
+    source_labels = [
+      "__meta_kubernetes_pod_label_app_kubernetes_io_name",
+      "__meta_kubernetes_pod_label_app",
+      "controller_name",
+      "__meta_kubernetes_pod_name",
+    ]
+    regex        = "^;*([^;]+)(;.*)?$"
+    target_label = "app"
+  }
+
+  rule {
+    source_labels = ["__meta_kubernetes_pod_node_name"]
+    separator     = ":"
+    target_label  = "host"
+  }
+}
+

monitoring/base/alloy/kube-pod-logs-scraper/helm-release.yaml

@@ -0,0 +1,24 @@
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: alloy-kube-pod-logs-scraper
+spec:
+  releaseName: alloy-kube-pod-logs-scraper
+  interval: 1m
+  chart:
+    spec:
+      chart: alloy
+      version: 1.x.x
+      sourceRef:
+        kind: HelmRepository
+        name: grafana
+      interval: 40h
+  valuesFrom:
+    - kind: ConfigMap
+      name: alloy-kube-pod-logs-scraper-helm-values
+      valuesKey: values.yaml
+
+
+
+
+

monitoring/base/alloy/kube-pod-logs-scraper/helm-values.yaml

@@ -0,0 +1,35 @@
+controller:
+  type: 'deployment'
+alloy:
+
+  # https://grafana.com/docs/alloy/latest/collect/logs-in-kubernetes/
+  configMap:
+    create: false
+    name: alloy-kube-pod-logs-scraper
+    key: config.alloy
+
+  extraEnv:
+
+    - name: CLUSTER_NAME
+      valueFrom:
+        secretKeyRef:
+          name: alloy-global
+          key: cluster_name
+
+    - name: ZONE
+      valueFrom:
+        secretKeyRef:
+          name: alloy-global
+          key: zone
+
+    - name: LOKI_URL
+      valueFrom:
+        secretKeyRef:
+          name: alloy-global
+          key: loki_url
+
+    - name: PROMETHEUS_URL
+      valueFrom:
+        secretKeyRef:
+          name: alloy-global
+          key: prometheus_url

monitoring/base/alloy/kube-pod-logs-scraper/kustomization.yaml

@@ -0,0 +1,14 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - helm-release.yaml
+
+configMapGenerator:
+  - name: alloy-kube-pod-logs-scraper
+    files:
+      - config.alloy=config.alloy
+  - name: alloy-kube-pod-logs-scraper-helm-values
+    files:
+      - values.yaml=helm-values.yaml
+generatorOptions:
+  disableNameSuffixHash: true