Add Gearman G2 chart (#1421)

stable/g2/.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/g2/Chart.yaml

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+apiVersion: v1
+description: G2 by AppsCode - Gearman in Golang
+name: g2
+version: 0.1.0
+appVersion: 0.5.0
+home: https://github.com/appscode/g2
+icon: https://cdn.appscode.com/images/icon/g2.png
+sources:
+  - https://github.com/appscode/g2
+maintainers:
+  - name: appscode
+    email: [email protected]

stable/g2/README.md

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+# G2
+[G2 by AppsCode](https://github.com/appscode/g2) is a modern implementation of Gearman server in GO.
+## TL;DR;
+
+```bash
+$ helm install stable/g2
+```
+
+## Introduction
+
+This chart bootstraps a [Gearman server](https://github.com/appscode/g2) deployment on a [Kubernetes](http://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.
+
+
+## Prerequisites
+
+- Kubernetes 1.3+
+
+## Installing the Chart
+To install the chart with the release name `my-release`:
+```bash
+$ helm install --name my-release stable/g2
+```
+The command deploys G2 Gearman server on the Kubernetes cluster in the default configuration. The [configuration](#configuration) section lists the parameters that can be configured during installation.
+
+> **Tip**: List all releases using `helm list`
+
+## Uninstalling the Chart
+
+To uninstall/delete the `my-release`:
+
+```bash
+$ helm delete my-release
+```
+
+The command removes all the Kubernetes components associated with the chart and deletes the release.
+
+## Configuration
+
+The following tables lists the configurable parameters of the Stash chart and their default values.
+
+
+| Parameter                | Description                                                       | Default             |
+| ------------------------ | ----------------------------------------------------------------- | ------------------- |
+| `replicaCount`           | Number of stash operator replicas to create                       | `1`                 |
+| `g2.image`               | G2 container image                                                | `appscode/gearmand` |
+| `g2.tag`                 | G2 container image tag                                            | `0.5.0`             |
+| `g2.pullPolicy`          | G2 container image pull policy                                    | `IfNotPresent`      |
+| `g2.serviceType`         | G2 service type                                                   | `ClusterIP`         |
+| `rbac.install`           | install required rbac service account, roles and rolebindings     | `false`             |
+| `rbac.apiVersion`        | rbac api version `v1alpha1|v1beta1`                               | `v1beta1`           |
+
+
+Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example:
+
+```bash
+$ helm install --name my-release --set image.tag=v0.2.1 stable/g2
+```
+
+Alternatively, a YAML file that specifies the values for the parameters can be provided while
+installing the chart. For example:
+
+```bash
+$ helm install --name my-release --values values.yaml stable/g2
+```
+
+## RBAC
+By default the chart will not install the recommended RBAC roles and rolebindings.
+
+You need to have the following parameter on the api server. See the following document for how to enable [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)
+
+```
+--authorization-mode=RBAC
+```
+
+To determine if your cluster supports RBAC, run the the following command:
+
+```console
+$ kubectl api-versions | grep rbac
+```
+
+If the output contains "alpha" and/or "beta", you can may install the chart with RBAC enabled (see below).
+
+### Enable RBAC role/rolebinding creation
+
+To enable the creation of RBAC resources (On clusters with RBAC). Do the following:
+
+```console
+$ helm install --name my-release stable/g2 --set rbac.install=true
+```
+
+### Changing RBAC manifest apiVersion
+
+By default the RBAC resources are generated with the "v1beta1" apiVersion. To use "v1alpha1" do the following:
+
+```console
+$ helm install --name my-release stable/g2 --set rbac.install=true,rbac.apiVersion=v1alpha1
+```

stable/g2/templates/NOTES.txt

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+To verify that G2 has started, run:
+
+  kubectl --namespace={{ .Release.Namespace }} get deployments -l "release={{ .Release.Name }}, app={{ template "name" . }}"

stable/g2/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "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).
+*/}}
+{{- define "fullname" -}}
+{{- $name := default .Chart.Name .Values.nameOverride -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

stable/g2/templates/cluster-role-binding.yaml

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+{{ if .Values.rbac.install }}
+{{- $serviceName := include "fullname" . -}}
+apiVersion: rbac.authorization.k8s.io/{{ required "A valid .Values.rbac.apiVersion entry required!" .Values.rbac.apiVersion }}
+kind: ClusterRoleBinding
+metadata:
+  name: {{ $serviceName }}
+  labels:
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    app: "{{ template "fullname" . }}"
+    heritage: "{{ .Release.Service }}"
+    release: "{{ .Release.Name }}"
+subjects:
+- kind: ServiceAccount
+  name: {{ $serviceName }}
+  namespace: {{ .Release.Namespace }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ $serviceName }}
+{{ end }}

stable/g2/templates/cluster-role.yaml

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+{{ if .Values.rbac.install }}
+{{- $serviceName := include "fullname" . -}}
+apiVersion: rbac.authorization.k8s.io/{{ required "A valid .Values.rbac.apiVersion entry required!" .Values.rbac.apiVersion }}
+kind: ClusterRole
+metadata:
+  name: {{ $serviceName }}
+  labels:
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    app: "{{ template "fullname" . }}"
+    heritage: "{{ .Release.Service }}"
+    release: "{{ .Release.Name }}"
+rules:
+- apiGroups:
+  - extensions
+  resources:
+  - deployments
+  verbs: ["get", "create", "update"]
+- apiGroups: [""]
+  resources:
+  - services
+  verbs: ["create", "update"]
+- apiGroups: [""]
+  resources:
+  - pods
+  verbs: ["list", "create", "update", "delete"]
+{{ end }}

stable/g2/templates/deployment.yaml

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+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: {{ template "fullname" . }}
+  labels:
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    app: "{{ template "name" . }}"
+    heritage: "{{ .Release.Service }}"
+    release: "{{ .Release.Name }}"
+spec:
+  replicas: {{ .Values.replicaCount }}
+  template:
+    metadata:
+      labels:
+        app: "{{ template "name" . }}"
+        release: "{{ .Release.Name }}"
+    spec:
+{{- if .Values.rbac.install }}
+      serviceAccountName: {{ template "fullname" . }}
+{{- end }}
+      containers:
+      - args:
+        - run
+        - --storage-dir=/var/db
+        - --v=5
+        image: '{{ .Values.g2.image }}:{{ .Values.g2.tag }}'
+        imagePullPolicy: '{{ .Values.g2.pullPolicy }}'
+        name: gearman-server
+        ports:
+        - containerPort: 4730
+          name: http
+          protocol: TCP
+        - containerPort: 3000
+          name: restapi
+          protocol: TCP
+        volumeMounts:
+        - mountPath: /var/db
+          name: data-volume
+      volumes:
+      - emptyDir: {}
+        name: data-volume

stable/g2/templates/service-account.yaml

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+{{ if .Values.rbac.install }}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ template "fullname" . }}
+  labels:
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    app: "{{ template "fullname" . }}"
+    heritage: "{{ .Release.Service }}"
+    release: "{{ .Release.Name }}"
+{{ end }}

stable/g2/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "fullname" . }}
+  labels:
+    app: "{{ template "name" . }}"
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+    release: "{{ .Release.Name }}"
+    heritage: "{{ .Release.Service }}"
+spec:
+  ports:
+  - name: http
+    port: 4730
+    protocol: TCP
+    targetPort: http
+  - name: restapi
+    port: 3000
+    protocol: TCP
+    targetPort: restapi
+  selector:
+    app: "{{ template "name" . }}"
+    release: "{{ .Release.Name }}"
+  type: '{{ .Values.g2.serviceType }}'

stable/g2/values.yaml

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+replicaCount: 1
+g2:
+  image: appscode/gearmand
+  pullPolicy: IfNotPresent
+  tag: 0.5.0
+  serviceType: ClusterIP
+rbac:
+  install: false
+  apiVersion: v1beta1