From 1f743693c58cfb40910fafe1930783fdb0ab37a0 Mon Sep 17 00:00:00 2001
From: Tanguy Herbron <tanguy.herbron@outlook.com>
Date: Mon, 11 Nov 2024 19:03:28 +0100
Subject: [PATCH] feat(node-exporter): Add exporter for hardware metrics

---
 manifests/kustomization.yaml                |  1 +
 manifests/node-exporter/daemonset.yaml      | 55 +++++++++++++++++++++
 manifests/node-exporter/kustomization.yaml  |  7 +++
 manifests/node-exporter/service.yaml        | 17 +++++++
 manifests/node-exporter/servicemonitor.yaml | 12 +++++
 5 files changed, 92 insertions(+)
 create mode 100644 manifests/node-exporter/daemonset.yaml
 create mode 100644 manifests/node-exporter/kustomization.yaml
 create mode 100644 manifests/node-exporter/service.yaml
 create mode 100644 manifests/node-exporter/servicemonitor.yaml

diff --git a/manifests/kustomization.yaml b/manifests/kustomization.yaml
index 91c53c8..8afc7ec 100644
--- a/manifests/kustomization.yaml
+++ b/manifests/kustomization.yaml
@@ -9,3 +9,4 @@ resources:
   - loki
   - prometheus
   - grafana
+  - node-exporter
diff --git a/manifests/node-exporter/daemonset.yaml b/manifests/node-exporter/daemonset.yaml
new file mode 100644
index 0000000..052d74d
--- /dev/null
+++ b/manifests/node-exporter/daemonset.yaml
@@ -0,0 +1,55 @@
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  labels:
+    app.kubernetes.io/component: exporter
+    app.kubernetes.io/name: node-exporter
+  name: node-exporter
+  namespace: monitoring
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/component: exporter
+      app.kubernetes.io/name: node-exporter
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/component: exporter
+        app.kubernetes.io/name: node-exporter
+    spec:
+      containers:
+      - args:
+        - --path.sysfs=/host/sys
+        - --path.rootfs=/host/root
+        - --no-collector.wifi
+        - --no-collector.hwmon
+        - --collector.filesystem.ignored-mount-points=^/(dev|proc|sys|var/lib/docker/.+|var/lib/kubelet/pods/.+)($|/)
+        - --collector.netclass.ignored-devices=^(veth.*)$
+        name: node-exporter
+        image: prom/node-exporter
+        ports:
+          - containerPort: 9100
+            protocol: TCP
+        resources:
+          limits:
+            cpu: 250m
+            memory: 180Mi
+          requests:
+            cpu: 102m
+            memory: 180Mi
+        volumeMounts:
+        - mountPath: /host/sys
+          mountPropagation: HostToContainer
+          name: sys
+          readOnly: true
+        - mountPath: /host/root
+          mountPropagation: HostToContainer
+          name: root
+          readOnly: true
+      volumes:
+      - hostPath:
+          path: /sys
+        name: sys
+      - hostPath:
+          path: /
+        name: root
diff --git a/manifests/node-exporter/kustomization.yaml b/manifests/node-exporter/kustomization.yaml
new file mode 100644
index 0000000..5a146eb
--- /dev/null
+++ b/manifests/node-exporter/kustomization.yaml
@@ -0,0 +1,7 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - daemonset.yaml
+  - service.yaml
+  - servicemonitor.yaml
diff --git a/manifests/node-exporter/service.yaml b/manifests/node-exporter/service.yaml
new file mode 100644
index 0000000..b03b338
--- /dev/null
+++ b/manifests/node-exporter/service.yaml
@@ -0,0 +1,17 @@
+kind: Service
+apiVersion: v1
+metadata:
+  name: node-exporter
+  namespace: monitoring
+  annotations:
+      prometheus.io/scrape: 'true'
+      prometheus.io/port: '9100'
+spec:
+  selector:
+      app.kubernetes.io/component: exporter
+      app.kubernetes.io/name: node-exporter
+  ports:
+  - name: node-exporter
+    protocol: TCP
+    port: 9100
+    targetPort: 9100
diff --git a/manifests/node-exporter/servicemonitor.yaml b/manifests/node-exporter/servicemonitor.yaml
new file mode 100644
index 0000000..d71465d
--- /dev/null
+++ b/manifests/node-exporter/servicemonitor.yaml
@@ -0,0 +1,12 @@
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: node-exporter
+  namespace: monitoring
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: node-exporter
+  endpoints:
+    - port: node-exporter
+      path: /metrics