feat: add drl exporter chart

charts/drl-exporter/.gitignore

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+# Useful `.gitignore` templates:
+# https://github.com/github/gitignore
+
+# ----------------------------------------------------------------------
+# | Linux                                                              |
+# ----------------------------------------------------------------------
+
+*~
+_local
+dist
+site
+.choco
+
+
+# ----------------------------------------------------------------------
+# | Miscellaneous                                                      |
+# ----------------------------------------------------------------------
+
+# Node.js, npm, and yarn.
+
+node_modules
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+
+# ----------------------------------------------------------------------
+# | macOS                                                              |
+# ----------------------------------------------------------------------
+
+._*
+.AppleDouble
+.DS_Store
+.localized
+.LSOverride
+.Spotlight-V100
+.Trashes
+
+
+# ----------------------------------------------------------------------
+# | Vim                                                                |
+# ----------------------------------------------------------------------
+
+%*
+*.sw[a-z]
+*.un~
+.netrwhist
+Session.vim
+
+
+# ----------------------------------------------------------------------
+# | Windows                                                            |
+# ----------------------------------------------------------------------
+
+Desktop.ini
+ehthumbs.db
+Thumbs.db
+

charts/drl-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
+# OWNERS file for Kubernetes
+OWNERS

charts/drl-exporter/Chart.yaml

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+apiVersion: v2
+name: drl-exporter
+version: 0.1.1
+description: Prometheus exporter for dockerhub rate limits 
+type: application
+keywords:
+  - prometheus
+  - exporter
+  - dockerhub
+home: https://charts.lmno.pk
+maintainers:
+  - name: Abdul Khaliq
+    email: a.khaliq@outlook.my
+    url: https://github.com/kha7iq/charts
+appVersion: 2.1.2

charts/drl-exporter/README.md

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+# Rate Limit Exporter
+
+### This chart can be used to deploy  [DRL Exporter](https://github.com/kha7iq/drl-exporter).
+
+![Version: 0.1.1](https://img.shields.io/badge/Version-0.1.1-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 2.1.2](https://img.shields.io/badge/AppVersion-2.1.2-informational?style=flat-square)
+
+## Installing the Chart
+
+To install the chart with the release name `drl-exporter`
+
+```console
+$ helm repo add lmno http://charts.lmno.pk
+$ helm install drl-exporter lmno/drl-exporter
+```
+
+## Values
+
+| Key | Type | Default | Description |
+|-----|------|---------|-------------|
+| affinity | object | `{}` | Configure [affinity and anti-affinity](https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#affinity-and-anti-affinity). |
+| args | list | `[]` | Override default image arguments. |
+| command | list | `[]` | Override default image command. |
+| dnsConfig | object | `{}` | Specify a custom dns config [dnsConfig](https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-dns-config). |
+| dnsPolicy | string | `"ClusterFirst"` | Specify dns policy [dnsPolicy](https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-s-dns-policy). |
+| env | list | `[]` | Define environment variables. |
+| envFrom | list | `[]` | Define environment variables from existing ConfigMap or Secret data. |
+| exporter.auth.dockerHubPassword | string | `""` | Dockerhub passowrd |
+| exporter.auth.dockerHubUsername | string | `""` | Dockerhub username |
+| exporter.auth.enableFileAuth | object | `{"configFileLocation":"","enabled":false}` | Docker config file based authentication |
+| exporter.auth.enableFileAuth.configFileLocation | string | `""` | Config file location  |
+| exporter.auth.enableFileAuth.enabled | bool | `false` | Enable file based authentication |
+| exporter.auth.enabled | bool | `false` | Enable/disable authentication for given account |
+| exporter.listenPort | int | `2121` |  |
+| global.commonLabels | object | `{}` | Apply labels to all resources. |
+| global.fullnameOverride | string | `""` | Override the fully qualified app name. |
+| global.nameOverride | string | `""` | Override the name of the app. |
+| image.name | string | `"khaliq/drl-exporter"` | Specify the image name to use (relative to `image.repository`). |
+| image.pullPolicy | string | `"Always"` | Specify the [pullPolicy](https://kubernetes.io/docs/concepts/containers/images/#image-pull-policy). |
+| image.pullSecrets | list | `[]` | Specify the image pull secrets if pulling from private registry [imagePullSecrets](https://kubernetes.io/docs/concepts/containers/images/#specifying-imagepullsecrets-on-a-pod). |
+| image.repository | string | `"docker.io"` | Specify the image repository to use. |
+| image.tag | string | `"latest"` | Specify the image tag to use. ( latest or specific release ) |
+| lifecycle | object | `{}` | Specify lifecycle hooks for Containers. |
+| livenessProbe | object | `{}` | Specify the livenessProbe [configuration](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#configure-probes). |
+| nodeSelector | object | `{}` | Configure [nodeSelector](https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#nodeselector). |
+| podAnnotations | object | `{}` | Set annotations on Pods. |
+| podHostNetwork | bool | `false` | Enable the hostNetwork option on Pods. |
+| podLabels | object | `{}` | Set labels on Pods. |
+| podPriorityClassName | string | `""` | Set the [priorityClassName](https://kubernetes.io/docs/concepts/scheduling-eviction/pod-priority-preemption/#priorityclass). |
+| readinessProbe | object | `{}` | Specify the readinessProbe [configuration](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/#configure-probes). |
+| resources | object | `{"limits":{"cpu":"500m","memory":"256Mi"},"requests":{"cpu":"100m","memory":"128Mi"}}` | Specify resource requests and limits. |
+| serviceAccount.create | bool | `true` |  |
+| serviceMonitor.enabled | bool | `false` |  |
+| serviceMonitor.interval | string | `"1m"` |  |
+| serviceMonitor.labels | object | `{}` |  |
+| serviceMonitor.path | string | `"/metrics"` |  |
+| serviceMonitor.relabelings | list | `[]` |  |
+| serviceMonitor.scheme | string | `"http"` |  |
+| serviceMonitor.scrapeTimeout | string | `"30s"` |  |
+| serviceMonitor.tlsConfig | object | `{}` |  |
+| tolerations | list | `[]` | Configure [taints and tolerations](https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/). |
+| topologySpreadConstraints | list | `[]` | Configure [topology spread constraints](https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/). |
+

charts/drl-exporter/README.md.gotmpl

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+# Rate Limit Exporter
+
+### This chart can be used to deploy  [DRL Exporter](https://github.com/kha7iq/drl-exporter).
+
+{{ template "chart.versionBadge" . }}{{ template "chart.typeBadge" . }}{{ template "chart.appVersionBadge" . }}
+
+
+
+## Installing the Chart
+
+To install the chart with the release name `drl-exporter`
+
+```console
+$ helm repo add lmno http://charts.lmno.pk
+$ helm install drl-exporter lmno/{{ template "chart.name" . }}
+```
+
+{{ template "chart.requirementsSection" . }}
+
+{{ template "chart.valuesSection" . }}
+

charts/drl-exporter/templates/NOTES.txt

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+
+
+Thank you for installing {{ .Chart.Name }}, your release {{ .Release.Name }} is deployed.
+
+************************************************************************************
+*** PLEASE BE PATIENT: It may take a little while for the release to be available. ***
+************************************************************************************
+
+To watch the status of service run:
+kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "drl.fullname" . }}

charts/drl-exporter/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "drl.name" -}}
+{{- default .Chart.Name .Values.global.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate strings at 63 characters because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If the release name contains a chart name it will be used as a full name.
+*/}}
+{{- define "drl.fullname" -}}
+{{- if .Values.global.fullnameOverride }}
+{{- .Values.global.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.global.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 "drl.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+
+{{/*
+Common template labels.
+*/}}
+{{- define "drl.template-labels" -}}
+app.kubernetes.io/name: {{ include "drl.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Common labels.
+*/}}
+{{- define "drl.labels" -}}
+helm.sh/chart: {{ include "drl.chart" . }}
+{{ include "drl.template-labels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Values.image.tag | quote }}
+{{- end }}
+{{- if .Values.global.commonLabels }}
+{{ toYaml .Values.global.commonLabels }}
+{{- end }}
+{{- end -}}
+
+
+{{/*
+Selector labels
+*/}}
+{{- define "drl.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "drl.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+
+{{/*
+Return the target Kubernetes version
+*/}}
+{{- define "drl.kubeVersion" -}}
+    {{- .Capabilities.KubeVersion.Version -}}
+{{- end -}}
+
+{{/*
+Return the appropriate apiVersion for deployment.
+*/}}
+{{- define "drl.deployment.apiVersion" -}}
+{{- if semverCompare "<1.14-0" (include "drl.kubeVersion" .) -}}
+{{- print "extensions/v1beta1" -}}
+{{- else -}}
+{{- print "apps/v1" -}}
+{{- end -}}
+{{- end -}}

charts/drl-exporter/templates/_pod.tpl

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+{{/*
+Defines the PodSpec for exporter.
+*/}}
+{{- define "drl.pod" -}}
+{{- if .Values.podHostNetwork }}
+hostNetwork: {{ .Values.podHostNetwork }}
+{{- end }}
+{{- if .Values.podPriorityClassName }}
+priorityClassName: {{ .Values.podPriorityClassName }}
+{{- end }}
+{{- if .Values.dnsPolicy }}
+dnsPolicy: {{ .Values.dnsPolicy }}
+{{- end }}
+{{- if .Values.dnsConfig }}
+dnsConfig: {{ toYaml .Values.dnsConfig | nindent 2 }}
+{{- end }}
+{{- if .Values.image.pullSecrets }}
+imagePullSecrets: {{ toYaml .Values.image.pullSecrets | nindent 2 }}
+{{- end }}
+containers:
+  - name: drl-exporter
+    image: "{{ .Values.image.repository }}/{{ .Values.image.name }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+    imagePullPolicy: {{ .Values.image.pullPolicy }}
+{{- if .Values.serviceAccount.create }}
+    serviceAccountName: {{ include "drl.fullname" . }}
+{{- end }}
+    ports:
+    - name: http
+      containerPort: {{ default "2121" .Values.exporter.listenPort }}
+      protocol: TCP
+{{- if .Values.command }}
+    command: {{ .Values.command }}
+{{- end }}
+{{- if .Values.args }}
+    args: {{ toYaml .Values.args | nindent 6 }}
+{{- end }}
+    env:
+    - name: EXPORTER_PORT
+      value: {{ default 2121 .Values.exporter.listenPort | quote }}
+{{- if .Values.exporter.auth.enabled -}}
+    - name: DOCKERHUB_PASSWORD
+      valueFrom:
+        secretKeyRef:
+          name: {{ include "drl.fullname" . }}-secrets
+          key: dockerhub-password
+    - name: DOCKERHUB_USER
+      valueFrom:
+        secretKeyRef:
+          name: {{ include "drl.fullname" . }}-secrets
+          key: dockerhub-username
+{{- end }}
+{{- if .Values.exporter.auth.enabled -}}
+    - name: FILE_AUTH_DIR
+      valueF: {{ default "/config" .Values.exporter.auth.enableFileAuth.configFileLocation | quote }}
+{{- end }}
+{{- if .Values.env }}
+{{ toYaml .Values.env | indent 4 }}
+{{- end }}
+{{- if .Values.envFrom }}
+    envFrom: {{ toYaml .Values.envFrom | nindent 6 }}
+{{- end }}
+{{- if .Values.livenessProbe }}
+    livenessProbe: {{ toYaml .Values.livenessProbe | trim | nindent 6 }}
+{{- end }}
+{{- if .Values.readinessProbe }}
+    readinessProbe: {{ toYaml .Values.readinessProbe | trim | nindent 6 }}
+{{- end }}
+{{- if .Values.resources }}
+    resources: {{ toYaml .Values.resources | nindent 6 }}
+{{- end }}
+{{- if .Values.lifecycle }}
+    lifecycle: {{ toYaml .Values.lifecycle | nindent 6 }}
+{{- end }}
+{{- if .Values.nodeSelector }}
+nodeSelector: {{ toYaml .Values.nodeSelector | nindent 2 }}
+{{- end }}
+{{- if .Values.affinity }}
+affinity: {{ toYaml .Values.affinity | nindent 2 }}
+{{- end }}
+{{- if .Values.tolerations }}
+tolerations: {{ toYaml .Values.tolerations | nindent 2 }}
+{{- end }}
+{{- if  .Values.topologySpreadConstraints }}
+topologySpreadConstraints: {{ toYaml .Values.topologySpreadConstraints | nindent 2 }}
+{{- end }}
+{{- end }}

charts/drl-exporter/templates/deployment.yaml

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+apiVersion: {{ include "drl.deployment.apiVersion" . }}
+kind: Deployment
+metadata:
+  name: {{ include "drl.fullname" . }}
+  namespace: {{ .Release.Namespace }}
+  labels: {{ include "drl.labels" . | nindent 4 }}
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+  {{- include "drl.template-labels" . | nindent 6 }}
+  template:
+    metadata:
+      labels: {{ include "drl.template-labels" . | nindent 8 }}
+        {{- if .Values.podLabels }}
+{{ toYaml .Values.podLabels | indent 8 }}
+        {{- end }}
+      annotations:
+        checksum/secret: {{ tpl (toYaml .Values.exporter.auth.dockerHubPassword) . | sha256sum }}
+        {{- if .Values.podAnnotations }}
+{{ tpl (toYaml .Values.podAnnotations) . | indent 8 }}
+        {{- end }}
+    spec: {{ include "drl.pod" . | nindent 6 }}