Add helm-chart for ray-job crd

helm-chart/ray-job/.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
+.vscode/

helm-chart/ray-job/Chart.yaml

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+apiVersion: v1
+description: A Helm chart for Kubernetes
+name: ray-job
+version: 1.1.0
+icon: https://github.com/ray-project/ray/raw/master/doc/source/images/ray_header_logo.png

helm-chart/ray-job/README.md

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+# RayJob
+
+RayJob is a custom resource definition (CRD). **KubeRay operator** will listen to the resource events about RayJob and create related Kubernetes resources (e.g. Pod & Service). Hence, **KubeRay operator** installation and **CRD** registration are required for this guide.
+
+## Prerequisites
+See [kuberay-operator/README.md](https://github.com/ray-project/kuberay/blob/master/helm-chart/kuberay-operator/README.md) for more details.
+* Helm
+* Install custom resource definition and KubeRay operator (covered by the following end-to-end example.)
+
+## End-to-end example
+Find full documentation and examples here: https://github.com/ray-project/kuberay/blob/master/docs/guidance/rayjob.md

helm-chart/ray-job/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "ray-job.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 "ray-job.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 "ray-job.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Common labels
+*/}}
+{{- define "ray-job.labels" -}}
+helm.sh/chart: {{ include "ray-job.chart" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end -}}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "ray-job.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create -}}
+    {{ default (include "ray-job.fullname" .) .Values.serviceAccount.name }}
+{{- else -}}
+    {{ default "default" .Values.serviceAccount.name }}
+{{- end -}}
+{{- end -}}