add initial chart for helm-exporter (helm#9764)

Signed-off-by: Shane Starcher <[email protected]>

stable/helm-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
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj

stable/helm-exporter/Chart.yaml

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+apiVersion: v1
+appVersion: "0.1.0"
+description: Exports helm release stats to prometheus
+name: helm-exporter
+version: 0.1.0
+home: https://github.com/sstarcher/helm-exporter
+sources:
+- https://github.com/sstarcher/helm-exporter
+maintainers:
+- name: sstarcher
+  email: [email protected]

stable/helm-exporter/OWNERS

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+approvers:
+- sstarcher
+reviewers:
+- sstarcher

stable/helm-exporter/README.md

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+# helm-exporter
+
+Installs [helm-exporter](https://github.com/sstarcher/helm-exporter) to export helm stats to prometheus.
+
+## TL;DR;
+
+```console
+$ helm install stable/helm-exporter
+```
+
+## Introduction
+
+This chart bootstraps a [helm-exporter](https://github.com/sstarcher/helm-exporter) deployment on a [Kubernetes](http://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.
+
+## Installing the Chart
+
+To install the chart with the release name `my-release`:
+
+```console
+$ helm install stable/helm-exporter --name my-release
+```
+
+The command deploys helm-exporter on the Kubernetes cluster in the default configuration. The [configuration](#configuration) section lists the parameters that can be configured during installation.
+
+## Uninstalling the Chart
+
+To uninstall/delete the `my-release` deployment:
+
+```console
+$ helm delete my-release
+```
+
+The command removes all the Kubernetes components associated with the chart and deletes the release.
+
+## Configuration
+
+The following table lists the configurable parameters of the helm-exporter chart and their default values.
+
+Parameter | Description | Default
+--- | --- | ---
+`affinity` | affinity configuration for pod assignment | `{}`
+`image.repository` | Image | `sstarcher/helm-exporter`
+`image.tag` | Image tag | `0.1.0`
+`image.pullPolicy` | Image pull policy | `IfNotPresent`
+`nodeSelector` | node labels for pod assignment | `{}`
+`resources` | pod resource requests & limits | `{}`
+`tolerations` | List of node taints to tolerate (requires Kubernetes 1.6+) | `[]`
+
+```console
+$ helm install stable/helm-exporter --name my-release
+```
+
+Alternatively, a YAML file that specifies the values for the above parameters can be provided while installing the chart. For example,
+
+```console
+$ helm install stable/helm-exporter --name my-release -f values.yaml
+```
+
+> **Tip**: You can use the default [values.yaml](values.yaml)

stable/helm-exporter/templates/NOTES.txt

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+1. Get the application URL by running these commands:
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "helm-exporter.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  echo "Visit http://127.0.0.1:9100 to use your application"
+  kubectl port-forward $POD_NAME 9100

stable/helm-exporter/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "helm-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 "helm-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 "helm-exporter.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "helm-exporter.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create -}}
+    {{ default (include "helm-exporter.fullname" .) .Values.serviceAccount.name }}
+{{- else -}}
+    {{ default "default" .Values.serviceAccount.name }}
+{{- end -}}
+{{- end -}}

stable/helm-exporter/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "helm-exporter.fullname" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "helm-exporter.name" . }}
+    helm.sh/chart: {{ include "helm-exporter.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: {{ include "helm-exporter.name" . }}
+      app.kubernetes.io/instance: {{ .Release.Name }}
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: {{ include "helm-exporter.name" . }}
+        app.kubernetes.io/instance: {{ .Release.Name }}
+    spec:
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: 9100
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /metrics
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /metrics
+              port: http
+          resources:
+{{ toYaml .Values.resources | indent 12 }}
+    {{- if .Values.rbac.create }}
+      serviceAccountName: {{ template "helm-exporter.fullname" . }}
+    {{- else }}
+      serviceAccountName: "{{ .Values.rbac.serviceAccountName }}"
+    {{- end }}
+    {{- with .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.affinity }}
+      affinity:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.tolerations }}
+      tolerations:
+{{ toYaml . | indent 8 }}
+    {{- end }}

stable/helm-exporter/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "helm-exporter.fullname" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "helm-exporter.name" . }}
+    helm.sh/chart: {{ include "helm-exporter.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+  annotations:
+    prometheus.io/scrape: "true"
+spec:
+  type: ClusterIP
+  clusterIP: None
+  ports:
+    - port: 9100
+      targetPort: http
+      protocol: TCP
+      name: metrics
+  selector:
+    app.kubernetes.io/name: {{ include "helm-exporter.name" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}

stable/helm-exporter/templates/serviceaccount.yaml

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+{{- if .Values.serviceAccount.create }}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  labels:
+    app.kubernetes.io/name: {{ include "helm-exporter.name" . }}
+    helm.sh/chart: {{ include "helm-exporter.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+  name: {{ template "helm-exporter.serviceAccountName" . }}
+{{- end }}

stable/helm-exporter/values.yaml

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+replicaCount: 1
+
+image:
+  repository: sstarcher/helm-exporter
+  tag: 0.1.0
+  pullPolicy: Always
+
+nameOverride: ""
+fullnameOverride: ""
+
+resources: {}
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}
+
+rbac:
+  # Specifies whether RBAC resources should be created
+  create: true
+
+serviceAccount:
+  # Specifies whether a ServiceAccount should be created
+  create: true
+  # The name of the ServiceAccount to use.
+  # If not set and create is true, a name is generated using the fullname template
+  name: