chore(chart): initial helm chart for dynamic-nfs-provisioner (#20)

This commit setups the required templates. 

Needs further refactoring in terms of directory structure and optimizations. 
Renaming from `nfspv` to `nfs`

Signed-off-by: Rahul krishnan R A <[email protected]>
Co-authored-by: Niladri Halder <[email protected]>

deploy/helm/charts/nfspv-provisioner/Chart.yaml

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+apiVersion: v2
+name: nfspv-provisioner
+description: Helm chart for OpenEBS Dynamic NFS PV. For instructions to install OpenEBS Dynamic NFS PV using helm chart, refer to https://openebs.github.io/dynamic-nfs-provisioner.
+type: application
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+version: 0.2.0
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application.
+appVersion: 0.2.0
+icon: https://raw.githubusercontent.com/cncf/artwork/master/projects/openebs/icon/color/openebs-icon-color.png
+home: http://www.openebs.io/
+keywords:
+  - storage
+  - nfs
+  - dynamic-nfspv
+sources:
+  - https://github.com/openebs/dynamic-nfs-provisioner
+
+maintainers:
+  - name: akhilerm
+    email: [email protected]
+  - name: kiranmova
+    email: [email protected]
+  - name: prateekpandey14
+    email: [email protected]
+  - name: rahulkrishnanra
+    email: [email protected]

deploy/helm/charts/nfspv-provisioner/README.md

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+#  OpenEBS NFSPV Provisioner
+
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+
+A Helm chart for openebs dynamic nfspv provisioner. This chart bootstraps OpenEBS Dynamic NFSPV provisioner deployment on a [Kubernetes](http://kubernetes.io) cluster using the  [Helm](https://helm.sh) package manager.
+
+
+**Homepage:** <http://www.openebs.io/>
+
+## Maintainers
+
+| Name | Email | Url |
+| ---- | ------ | --- |
+| akhilerm | [email protected] |  |
+| kiranmova | [email protected] |  |
+| prateekpandey14 | [email protected] |  |
+| rahulkrishnanra | [email protected] |  |
+
+
+## Get Repo Info
+
+```console
+helm repo add openebs-nfspv https://openebs.github.io/dynamic-nfspv-provisioner
+helm repo update
+```
+
+_See [helm repo](https://helm.sh/docs/helm/helm_repo/) for command documentation._
+
+## Install Chart
+
+Please visit the [link](https://openebs.github.io/dynamic-nfspv-provisioner/) for install instructions via helm3.
+
+```console
+# Helm
+$ helm install [RELEASE_NAME] openebs-nfspv/nfspv-provisioner
+```
+
+_See [configuration](#configuration) below._
+
+_See [helm install](https://helm.sh/docs/helm/helm_install/) for command documentation._
+
+
+## Uninstall Chart
+
+```console
+# Helm
+$ helm uninstall [RELEASE_NAME]
+```
+
+This removes all the Kubernetes components associated with the chart and deletes the release.
+
+_See [helm uninstall](https://helm.sh/docs/helm/helm_uninstall/) for command documentation._
+
+## Upgrading Chart
+
+```console
+# Helm
+$ helm upgrade [RELEASE_NAME] [CHART] --install
+```
+
+
+## Configuration
+
+The following table lists the configurable parameters of the OpenEBS NFSPV Provisioner chart and their default values.
+
+| Parameter                                   | Description                                   | Default                                   |
+| ------------------------------------------- | --------------------------------------------- | ----------------------------------------- | 
+| `analytics.enabled`                         | Enable sending stats to Google Analytics          | `true`                          |
+| `imagePullSecrets`                          | Provides image pull secret                       | `""`                            |
+| `nfspv.enabled`                             | Enable NFSPV Provisioner                          | `true`                          |
+| `nfspv.image.registry`                      | Registry for NFSPV Provisioner image              | `""`                            |
+| `nfspv.image.repository`                    | Image repository for NFSPV Provisioner            | `openebs/provisioner-nfs-amd64` |
+| `nfspv.image.tag`                           | Image tag for NFSPV Provisioner	                  | `0.2.0`                         |
+| `nfspv.image.pullPolicy`                    | Image pull policy for NFSPV Provisioner           | `IfNotPresent`                  |
+| `nfspv.annotations`                         | Annotations for NFSPV Provisioner metadata        | `""`                            |
+| `nfspv.nodeSelector`                        | Nodeselector for NFSPV Provisioner pods           | `""`                            |
+| `nfspv.tolerations`                         | NFSPV Provisioner pod toleration values           | `""`                            |
+| `nfspv.securityContext`                     | Seurity context for container                     | `""`                            |
+| `nfspv.healthCheck.initialDelaySeconds`     | Delay before liveness probe is initiated          | `30`                            |
+| `nfspv.healthCheck.periodSeconds`           | How often to perform the liveness probe           | `60`                            | 
+| `nfspv.enableLeaderElection`                | Enable leader election                            | `true`                          |
+| `rbac.create`                               | Enable RBAC Resources                             | `true`                          |
+| `rbac.pspEnabled`                           | Create pod security policy resources              | `false`                         |
+| `nfspv.affinity`                            | NFSPV Provisioner pod affinity                    | `{}`                            | 
+Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`.
+
+Alternatively, a YAML file that specifies the values for the parameters can be provided while installing the chart. For example,
+
+```bash
+helm install <release-name> -f values.yaml ----namespace openebs nfspv-provisioner
+```
+
+> **Tip**: You can use the default [values.yaml](values.yaml)

deploy/helm/charts/nfspv-provisioner/templates/NOTES.txt

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+Thank you for installing {{ .Chart.Name }} 😀
+
+Your release is named {{ .Release.Name }} and it's installed to namespace: {{ .Release.Namespace }}.
+
+The OpenEBS NFSPV Provisioner has been installed check its status by running:
+$ kubectl get pods -n {{ .Release.Namespace }}
+
+For more information, visit our Slack at https://openebs.io/community or view
+the documentation online at https://github.com/openebs/dynamic-nfs-provisioner/.

deploy/helm/charts/nfspv-provisioner/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "nfspv.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 "nfspv.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 the name of the service account to use
+*/}}
+{{- define "nfspv.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create -}}
+    {{ default (include "nfspv.fullname" .) .Values.serviceAccount.name }}
+{{- else -}}
+    {{ default "default" .Values.serviceAccount.name }}
+{{- end -}}
+{{- end -}}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "nfspv.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Meta labels
+*/}}
+{{- define "nfspv.common.metaLabels" -}}
+chart: {{ include "nfspv.chart" . }}
+heritage: {{ .Release.Service }}
+openebs.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+
+{{/*
+Selector Labels
+*/}}
+{{- define "nfspv.selectorLabels" -}}
+app: {{ include "nfspv.name" . }}
+release: {{ .Release.Name }}
+component: {{ .Values.nfspv.name }}
+{{- end }}
+
+{{/*
+Component labels
+*/}}
+{{- define "nfspv.componentLabels" -}}
+openebs.io/component-name: openebs-{{ .Values.nfspv.name }}
+{{- end -}}
+
+{{/*
+Common labels
+*/}}
+{{- define "nfspv.labels" -}}
+{{ include "nfspv.common.metaLabels" . }}
+{{ include "nfspv.selectorLabels" . }}
+{{ include "nfspv.componentLabels" . }}
+{{- end -}}

deploy/helm/charts/nfspv-provisioner/templates/clusterrole.yaml

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+# Define Role that allows operations on K8s pods/deployments
+{{- if .Values.rbac.create }}
+kind: ClusterRole
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: {{ include "nfspv.fullname" . }}
+  {{- with .Values.nfspv.annotations }}
+  annotations: {{ toYaml . | nindent 4 }}
+  {{- end }}
+  labels:
+  {{- include "nfspv.labels" . | nindent 4 }}
+rules:
+  - apiGroups: ["*"]
+    resources: ["nodes", "nodes/proxy"]
+    verbs: ["*"]
+  - apiGroups: ["*"]
+    resources: ["namespaces", "services", "pods", "pods/exec", "deployments", "deployments/finalizers", "replicationcontrollers", "replicasets", "events", "endpoints", "configmaps", "secrets", "jobs", "cronjobs"]
+    verbs: ["*"]
+  - apiGroups: ["*"]
+    resources: ["statefulsets", "daemonsets"]
+    verbs: ["*"]
+  - apiGroups: ["*"]
+    resources: ["resourcequotas", "limitranges"]
+    verbs: ["list", "watch"]
+  - apiGroups: ["*"]
+    resources: ["ingresses", "horizontalpodautoscalers", "verticalpodautoscalers", "poddisruptionbudgets", "certificatesigningrequests"]
+    verbs: ["list", "watch"]
+  - apiGroups: ["*"]
+    resources: ["storageclasses", "persistentvolumeclaims", "persistentvolumes"]
+    verbs: ["*"]
+  - apiGroups: ["apiextensions.k8s.io"]
+    resources: ["customresourcedefinitions"]
+    verbs: [ "get", "list", "create", "update", "delete", "patch"]
+  - apiGroups: ["openebs.io"]
+    resources: [ "*"]
+    verbs: ["*"]
+  - nonResourceURLs: ["/metrics"]
+    verbs: ["get"]
+
+{{- if .Values.rbac.pspEnabled}}}
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ include "nfspv.fullname" . }}-psp
+  {{- with .Values.nfspv.annotations }}
+  annotations: {{ toYaml . | nindent 4 }}
+  {{- end }}
+  labels:
+  {{- include "nfspv.labels" . | nindent 4 }}
+rules:
+  - apiGroups: ['policy']
+    resources: ['podsecuritypolicies']
+    verbs:     ['use']
+    resourceNames:
+      - {{ include "nfspv.fullname" . }}-psp
+{{- end }}
+{{- end }}

deploy/helm/charts/nfspv-provisioner/templates/clusterrolebinding.yaml

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+# Bind the Service Account with the Role Privileges.
+{{- if .Values.rbac.create }}
+kind: ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: {{ include "nfspv.fullname" . }}
+  {{- with .Values.nfspv.annotations }}
+  annotations: {{ toYaml . | nindent 4 }}
+  {{- end }}
+  labels:
+  {{- include "nfspv.labels" . | nindent 4 }}
+roleRef:
+  kind: ClusterRole
+  name: {{ include "nfspv.fullname" . }}
+  apiGroup: rbac.authorization.k8s.io
+subjects:
+  - kind: ServiceAccount
+    name: {{ include "nfspv.serviceAccountName" . }}
+    namespace: {{ .Release.Namespace }}
+
+{{- if .Values.rbac.pspEnabled }}
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ include "nfspv.fullname" . }}-psp
+  {{- with .Values.nfspv.annotations }}
+  annotations: {{ toYaml . | nindent 4 }}
+  {{- end }}
+  labels:
+  {{- include "nfspv.labels" . | nindent 4 }}
+roleRef:
+  kind: ClusterRole
+  name: {{ include "nfspv.fullname" . }}-psp
+  apiGroup: rbac.authorization.k8s.io
+subjects:
+  # Authorize specific service accounts:
+  - kind: ServiceAccount
+    name: {{ include "nfspv.serviceAccountName" . }}
+    namespace: {{ .Release.Namespace }}
+{{- end }}
+{{- end }}