Scaffold for MQTT

.env.example

@@ -6,6 +6,11 @@ NODE_02=<node-02-ip>
 NODE_03=<node-03-ip>
 NODE_04=<node-04-ip>
 
+# MQTT credentials
+MQTT_BROKER_URL="mqtts://$NODE_02:8883"
+MQTT_USERNAME=<your-mqtt-user>
+MQTT_PASSWORD=<your-mqtt-pwd>
+
 # System configured
 NODE_URL="https://$NODE_01:6443"
 KUBECONFIG=./config/cluster.yaml

Makefile

@@ -42,13 +42,22 @@ test-unit:
 preview:
 	@helm template ./helm/pi-agent
 
+.PHONY: secret
+secret:
+	@source venv/activate > /dev/null; \
+	kubectl create secret generic mqtt-credentials \
+		--namespace pi-agent \
+		--from-literal=MQTT_USERNAME=$$MQTT_USERNAME \
+		--from-literal=MQTT_PASSWORD=$$MQTT_PASSWORD \
+		--from-literal=MQTT_BROKER_URL=$$MQTT_BROKER_URL \
+		--dry-run=client -o yaml | kubectl apply -f -
+
 .PHONY: deploy
-deploy:
+deploy: secret
 	@source venv/activate > /dev/null; \
-	git fetch origin main --quiet; \
-	IMAGE_TAG=$$(git rev-parse --short origin/main); \
+	IMAGE_TAG=$${tag:-latest}; \
 	echo "Deploying image tag: $$IMAGE_TAG"; \
 	helm upgrade --install pi-agent helm/pi-agent \
         --set image.tag=$$IMAGE_TAG \
 		--namespace=pi-agent \
-        --create-namespace; 
+        --create-namespace;

app/go.mod

@@ -1,3 +1,10 @@
 module github.com/amfelso/homelab/pi-agent
 
 go 1.24.0
+
+require (
+	github.com/eclipse/paho.mqtt.golang v1.5.1 // indirect
+	github.com/gorilla/websocket v1.5.3 // indirect
+	golang.org/x/net v0.44.0 // indirect
+	golang.org/x/sync v0.17.0 // indirect
+)

app/go.sum

@@ -0,0 +1,8 @@
+github.com/eclipse/paho.mqtt.golang v1.5.1 h1:/VSOv3oDLlpqR2Epjn1Q7b2bSTplJIeV2ISgCl2W7nE=
+github.com/eclipse/paho.mqtt.golang v1.5.1/go.mod h1:1/yJCneuyOoCOzKSsOTUc0AJfpsItBGWvYpBLimhArU=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+golang.org/x/net v0.44.0 h1:evd8IRDyfNBMBTTY5XRF1vaZlD+EmWx6x8PkhR04H/I=
+golang.org/x/net v0.44.0/go.mod h1:ECOoLqd5U3Lhyeyo/QDCEVQ4sNgYsqvCZ722XogGieY=
+golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
+golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=

helm/pi-agent/templates/daemonset.yaml

@@ -21,6 +21,11 @@ spec:
           args:
             - "--schedule"
             - "{{ .Values.collector.schedule }}"
+          env:
+          - name: NODE_NAME
+            valueFrom:
+              fieldRef:
+                fieldPath: spec.nodeName
           volumeMounts:
           - name: sysfs
             mountPath: /host/sys

home-assistant/cluster-dashboard.yaml

@@ -0,0 +1,67 @@
+type: grid
+cards:
+  - type: heading
+    heading_style: title
+    heading: Kubernetes Cluster Stats
+    icon: mdi:robot-happy
+  - type: entities
+    entities:
+      - entity: sensor.node_01_cpu_usage
+        icon: mdi:cpu-64-bit
+        name: CPU Usage
+      - entity: sensor.node_01_temperature
+        icon: mdi:thermometer
+        name: CPU Temperature
+      - entity: sensor.node_01_memory_usage
+        name: Memory Usage
+        icon: mdi:memory
+      - entity: sensor.node_01_disk_usage
+        name: Disk Usage
+        icon: mdi:harddisk
+    state_color: false
+    show_header_toggle: false
+    grid_options:
+      columns: 6
+      rows: 5
+    title: node-01
+  - type: entities
+    entities:
+      - entity: sensor.node_03_cpu_usage
+        icon: mdi:cpu-64-bit
+        name: CPU Usage
+      - entity: sensor.node_03_temperature
+        icon: mdi:thermometer
+        name: CPU Temperature
+      - entity: sensor.node_03_memory_usage
+        name: Memory Usage
+        icon: mdi:memory
+      - entity: sensor.node_03_disk_usage
+        name: Disk Usage
+        icon: mdi:harddisk
+    title: node-03
+    state_color: false
+    show_header_toggle: false
+    grid_options:
+      columns: 6
+      rows: 5
+  - type: entities
+    entities:
+      - entity: sensor.node_04_cpu_usage
+        icon: mdi:cpu-64-bit
+        name: CPU Usage
+      - entity: sensor.node_04_temperature
+        icon: mdi:thermometer
+        name: CPU Temperature
+      - entity: sensor.node_04_memory_usage
+        name: Memory Usage
+        icon: mdi:memory
+      - entity: sensor.node_04_disk_usage
+        name: Disk Usage
+        icon: mdi:harddisk
+    title: node-04
+    state_color: false
+    show_header_toggle: false
+    grid_options:
+      columns: 6
+      rows: 5
+column_span: 2

home-assistant/mqtt-sensors.yaml

@@ -0,0 +1,64 @@
+mqtt:
+  sensor:
+    # node-01
+    - name: "Node 01 CPU Usage"
+      state_topic: "homelab/node-01/cpu"
+      unit_of_measurement: "%"
+      value_template: "{{ value }}"
+
+    - name: "Node 01 Memory Usage"
+      state_topic: "homelab/node-01/memory"
+      unit_of_measurement: "%"
+      value_template: "{{ value }}"
+
+    - name: "Node 01 Temperature"
+      state_topic: "homelab/node-01/temp"
+      unit_of_measurement: "°F"
+      value_template: "{{ value }}"
+
+    - name: "Node 01 Disk Usage"
+      state_topic: "homelab/node-01/disk"
+      unit_of_measurement: "%"
+      value_template: "{{ value }}"
+
+    # node-03
+    - name: "Node 03 CPU Usage"
+      state_topic: "homelab/node-03/cpu"
+      unit_of_measurement: "%"
+      value_template: "{{ value }}"
+
+    - name: "Node 03 Memory Usage"
+      state_topic: "homelab/node-03/memory"
+      unit_of_measurement: "%"
+      value_template: "{{ value }}"
+
+    - name: "Node 03 Temperature"
+      state_topic: "homelab/node-03/temp"
+      unit_of_measurement: "°F"
+      value_template: "{{ value }}"
+
+    - name: "Node 03 Disk Usage"
+      state_topic: "homelab/node-03/disk"
+      unit_of_measurement: "%"
+      value_template: "{{ value }}"
+
+    # node-04
+    - name: "Node 04 CPU Usage"
+      state_topic: "homelab/node-04/cpu"
+      unit_of_measurement: "%"
+      value_template: "{{ value }}"
+
+    - name: "Node 04 Memory Usage"
+      state_topic: "homelab/node-04/memory"
+      unit_of_measurement: "%"
+      value_template: "{{ value }}"
+
+    - name: "Node 04 Temperature"
+      state_topic: "homelab/node-04/temp"
+      unit_of_measurement: "°F"
+      value_template: "{{ value }}"
+
+    - name: "Node 04 Disk Usage"
+      state_topic: "homelab/node-04/disk"
+      unit_of_measurement: "%"
+      value_template: "{{ value }}"