First real pass at helm

helm/Chart.yaml

@@ -1,5 +1,5 @@
 apiVersion: v2
-name: piTemperatureMonitoring
+name: pi-temperature-monitoring
 description: A Helm chart for Kubernetes
 
 # A chart can be either an 'application' or a 'library' chart.

helm/templates/NOTES.txt

@@ -6,16 +6,16 @@
   {{- end }}
 {{- end }}
 {{- else if contains "NodePort" .Values.service.type }}
-  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "piTemperatureMonitoring.fullname" . }})
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "pi-temperature-monitoring.fullname" . }})
   export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
   echo http://$NODE_IP:$NODE_PORT
 {{- else if contains "LoadBalancer" .Values.service.type }}
      NOTE: It may take a few minutes for the LoadBalancer IP to be available.
-           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "piTemperatureMonitoring.fullname" . }}'
-  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "piTemperatureMonitoring.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "pi-temperature-monitoring.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "pi-temperature-monitoring.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
   echo http://$SERVICE_IP:{{ .Values.service.port }}
 {{- else if contains "ClusterIP" .Values.service.type }}
-  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "piTemperatureMonitoring.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "pi-temperature-monitoring.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
   export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
   echo "Visit http://127.0.0.1:8080 to use your application"
   kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT

helm/templates/_helpers.tpl

@@ -1,7 +1,7 @@
 {{/*
 Expand the name of the chart.
 */}}
-{{- define "piTemperatureMonitoring.name" -}}
+{{- define "pi-temperature-monitoring.name" -}}
 {{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
 {{- end }}
 
@@ -10,7 +10,7 @@ Create a default fully qualified app name.
 We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
 If release name contains chart name it will be used as a full name.
 */}}
-{{- define "piTemperatureMonitoring.fullname" -}}
+{{- define "pi-temperature-monitoring.fullname" -}}
 {{- if .Values.fullnameOverride }}
 {{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
 {{- else }}
@@ -26,16 +26,16 @@ If release name contains chart name it will be used as a full name.
 {{/*
 Create chart name and version as used by the chart label.
 */}}
-{{- define "piTemperatureMonitoring.chart" -}}
+{{- define "pi-temperature-monitoring.chart" -}}
 {{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
 {{- end }}
 
 {{/*
 Common labels
 */}}
-{{- define "piTemperatureMonitoring.labels" -}}
-helm.sh/chart: {{ include "piTemperatureMonitoring.chart" . }}
-{{ include "piTemperatureMonitoring.selectorLabels" . }}
+{{- define "pi-temperature-monitoring.labels" -}}
+helm.sh/chart: {{ include "pi-temperature-monitoring.chart" . }}
+{{ include "pi-temperature-monitoring.selectorLabels" . }}
 {{- if .Chart.AppVersion }}
 app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
 {{- end }}
@@ -45,17 +45,17 @@ app.kubernetes.io/managed-by: {{ .Release.Service }}
 {{/*
 Selector labels
 */}}
-{{- define "piTemperatureMonitoring.selectorLabels" -}}
-app.kubernetes.io/name: {{ include "piTemperatureMonitoring.name" . }}
+{{- define "pi-temperature-monitoring.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "pi-temperature-monitoring.name" . }}
 app.kubernetes.io/instance: {{ .Release.Name }}
 {{- end }}
 
 {{/*
 Create the name of the service account to use
 */}}
-{{- define "piTemperatureMonitoring.serviceAccountName" -}}
+{{- define "pi-temperature-monitoring.serviceAccountName" -}}
 {{- if .Values.serviceAccount.create }}
-{{- default (include "piTemperatureMonitoring.fullname" .) .Values.serviceAccount.name }}
+{{- default (include "pi-temperature-monitoring.fullname" .) .Values.serviceAccount.name }}
 {{- else }}
 {{- default "default" .Values.serviceAccount.name }}
 {{- end }}

helm/templates/daemon-set.yaml

@@ -1,13 +1,13 @@
 apiVersion: apps/v1
 kind: DaemonSet
 metadata:
-  name: {{ include "piTemperatureMonitoring.fullname" . }}
+  name: {{ include "pi-temperature-monitoring.fullname" . }}
   labels:
-    {{- include "piTemperatureMonitoring.labels" . | nindent 4 }}
+    {{- include "pi-temperature-monitoring.labels" . | nindent 4 }}
 spec:
   selector:
     matchLabels:
-      {{- include "piTemperatureMonitoring.selectorLabels" . | nindent 6 }}
+      {{- include "pi-temperature-monitoring.selectorLabels" . | nindent 6 }}
   template:
     metadata:
       {{- with .Values.podAnnotations }}
@@ -15,7 +15,7 @@ spec:
         {{- toYaml . | nindent 8 }}
       {{- end }}
       labels:
-        {{- include "piTemperatureMonitoring.selectorLabels" . | nindent 8 }}
+        {{- include "pi-temperature-monitoring.selectorLabels" . | nindent 8 }}
     spec:
       securityContext:
         {{- toYaml .Values.podSecurityContext | nindent 8 }}
@@ -23,7 +23,11 @@ spec:
         - name: {{ .Chart.Name }}
           securityContext:
             {{- toYaml .Values.securityContext | nindent 12 }}
-          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          {{ if .Values.image.tag }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          {{ else }}
+          image: "{{ .Values.image.repository }}"
+          {{ end }}
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           env:
             - name: NODE_NAME
@@ -37,11 +41,27 @@ spec:
           livenessProbe:
             httpGet:
               path: /
-              port: http
+              port: prometheus
           readinessProbe:
             httpGet:
               path: /
-              port: http
+              port: prometheus
           resources:
             {{- toYaml .Values.resources | nindent 12 }}
-
+          volumeMounts:
+            - name: usrbin
+              mountPath: /usr/bin
+              readOnly: true
+            - name: libs
+              mountPath: /lib/aarch64-linux-gnu
+              readOnly: true
+            # Not clear how to do `--device /dev/vchiq` -
+            # https://stackoverflow.com/questions/59290752/how-to-use-device-dev-video0-with-kubernetes says
+            # it might not be possible?
+      volumes:
+        - name: usrbin
+          hostPath:
+            path: /usr/bin
+        - name: libs
+          hostPath:
+            path: /lib/aarch64-linux-gnu

helm/templates/service-monitor.yaml

@@ -0,0 +1,13 @@
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  labels:
+    app: prometheus-operator
+    release: prometheus # Taken from https://cogarius.medium.com/3-3-complete-guide-to-ci-cd-pipelines-with-drone-io-on-kubernetes-drone-metrics-with-prometheus-c2668e42b03f
+  name: pi-temperature-monitoring
+spec:
+  endpoints:
+    - port: prometheus
+  selector:
+    matchLabels:
+      {{- include "pi-temperature-monitoring.selectorLabels" . | nindent 4 }}

helm/templates/service.yaml

@@ -1,9 +1,9 @@
 apiVersion: v1
 kind: Service
 metadata:
-  name: {{ include "piTemperatureMonitoring.fullname" . }}
+  name: {{ include "pi-temperature-monitoring.fullname" . }}
   labels:
-    {{- include "piTemperatureMonitoring.labels" . | nindent 4 }}
+    {{- include "pi-temperature-monitoring.labels" . | nindent 4 }}
 spec:
   type: {{ .Values.service.type }}
   ports:
@@ -12,4 +12,4 @@ spec:
       protocol: TCP
       name: prometheus
   selector:
-    {{- include "piTemperatureMonitoring.selectorLabels" . | nindent 4 }}
+    {{- include "pi-temperature-monitoring.selectorLabels" . | nindent 4 }}

helm/values.yaml

@@ -1,4 +1,4 @@
-# Default values for piTemperatureMonitoring.
+# Default values for pi-temperature-monitoring.
 # This is a YAML-formatted file.
 # Declare variables to be passed into your templates.
 
@@ -6,9 +6,9 @@ replicaCount: 1
 
 image:
   repository: "gitea.scubbo.org/scubbo/pi-temperature-monitoring"
-  pullPolicy: IfNotPresent
+  pullPolicy: Always
   # Overrides the image tag whose default is the chart appVersion.
-  tag: ""
+  tag: "latest"
 
 imagePullSecrets: []
 nameOverride: ""
@@ -19,7 +19,8 @@ podAnnotations: {}
 podSecurityContext: {}
   # fsGroup: 2000
 
-securityContext: {}
+securityContext:
+  privileged: true
   # capabilities:
   #   drop:
   #   - ALL