feat: add helm chart

charts/nats-blackbox-exporter/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/nats-blackbox-exporter/Chart.yaml

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+apiVersion: v2
+name: nats-blackbox-exporter
+description: A Helm chart for SnappCloud/Platform NATS BlackBox Exporter
+type: application
+version: 0.0.0
+appVersion: latest

charts/nats-blackbox-exporter/templates/_helpers.tpl

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+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "blackbox-exporter.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+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 "blackbox-exporter.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "blackbox-exporter.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "blackbox-exporter.labels" -}}
+helm.sh/chart: {{ include "blackbox-exporter.chart" . }}
+{{ include "blackbox-exporter.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "blackbox-exporter.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "blackbox-exporter.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "blackbox-exporter.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "blackbox-exporter.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

charts/nats-blackbox-exporter/templates/configmap.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "blackbox-exporter.fullname" . }}
+data:
+  config.yaml: |
+    logger:
+      level: {{ .Values.logLevel | quote}}
+    nats:
+      streams: {{ .Values.nats.streams | toYaml | nindent 8 }}
+      url: nats://{{ .Release.Name }}.{{ .Release.Namespace }}.svc.cluster.local:4222
+      publish_interval: {{ .Values.nats.publish_interval | quote }}
+      request_timeout: {{ .Values.nats.request_timeout | quote }}
+      max_pub_acks_inflight: {{ .Values.nats.rmax_pub_acks_inflight | quote }}
+      queue_subscription_group: {{ .Values.nats.queue_subscription_group | quote }}
+      flush_timeout: {{ .Values.nats.flush_timeout | quote }}
+      new_stream_allow: {{ .Values.nats.new_stream_allow }}
+    metric:
+      server:
+        address: ":8080"
+      enabled: true

charts/nats-blackbox-exporter/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "blackbox-exporter.fullname" . }}
+  labels:
+    {{- include "blackbox-exporter.labels" . | nindent 4 }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      {{- include "blackbox-exporter.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "blackbox-exporter.labels" . | nindent 8 }}
+        {{- with .Values.podLabels }}
+        {{- toYaml . | nindent 8 }}
+        {{- end }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          args:
+            - --configPath
+            - /app/setting/config.yaml
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - name: metrics
+              containerPort: {{ .Values.metrics.port }}
+              protocol: TCP
+          livenessProbe:
+            {{- toYaml .Values.livenessProbe | nindent 12 }}
+          readinessProbe:
+            {{- toYaml .Values.readinessProbe | nindent 12 }}
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+          volumeMounts:
+            - name: config
+              mountPath: /app/setting
+      volumes:
+        - name: config
+          configMap:
+            name: {{ include "blackbox-exporter.fullname" . }}

charts/nats-blackbox-exporter/templates/pod-monitor.yaml

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+apiVersion: monitoring.coreos.com/v1
+kind: PodMonitor
+metadata:
+  name: {{ include "blackbox-exporter.fullname" . }}
+  labels:
+    {{- include "blackbox-exporter.labels" . | nindent 4 }}
+spec:
+  selector:
+    matchLabels:
+      {{- include "blackbox-exporter.selectorLabels" . | nindent 6 }}
+  podMetricsEndpoints:
+  - port: metrics

charts/nats-blackbox-exporter/values.yaml

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+# Default values for blackbox-exporter.
+# to disable exporter just set replicaCount to 0
+replicaCount: 1
+
+image:
+  repository: ghcr.io/snapp-incubator/nats-blackbox-exporter
+  pullPolicy: IfNotPresent
+  # Overrides the image tag whose default is the chart appVersion.
+  tag: ""
+
+imagePullSecrets: []
+nameOverride: ""
+fullnameOverride: ""
+
+podAnnotations: {}
+podLabels: {}
+
+podSecurityContext: {}
+  # fsGroup: 2000
+
+securityContext: {}
+  # capabilities:
+  #   drop:
+  #   - ALL
+  # readOnlyRootFilesystem: true
+  # runAsNonRoot: true
+  # runAsUser: 1000
+
+resources:
+  limits:
+    cpu: 100m
+    memory: 128Mi
+  requests:
+    cpu: 100m
+    memory: 128Mi
+
+metrics:
+  port: 8080
+livenessProbe:
+  httpGet:
+    path: /metrics
+    port: metrics
+readinessProbe:
+  httpGet:
+    path: /metrics
+    port: metrics
+
+logLevel: debug
+
+nats:
+  streams:
+    - name: "stream"
+      subject: "test"
+  url: "localhost:4222"
+  publish_interval: 2s
+  request_timeout: 50ms
+  max_pub_acks_inflight: 1000
+  queue_subscription_group: "group"
+  flush_timeout: 2s
+  new_stream_allow: false