added longhorn chart

proposed/longhorn/.helmignore

+# 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

proposed/longhorn/Chart.yaml

+apiVersion: v1
+description: Longhorn is a distributed block storage system for Kubernetes powered by Rancher Labs.
+name: longhorn
+version: 0.1.0
+icon: https://s3.us-east-2.amazonaws.com/longhorn-assets/longhorn-logo.svg

proposed/longhorn/README.md

+# Longhorn
+
+Longhorn is a distributed block storage system for Kubernetes. Longhorn is lightweight, reliable, and easy-to-use. You can deploy Longhorn on an existing Kubernetes cluster with one simple command. Once Longhorn is deployed, it adds persistent volume support to the Kubernetes cluster.
+
+Longhorn implements distributed block storage using containers and microservices. Longhorn creates a dedicated storage controller for each block device volume and sychronously replicates the volume across multiple replicas stored on multiple nodes. The storage controller and replicas are themselves orchestrated using Kubernetes. Longhorn supports snapshots, backups, and even allows you to schedule recurring snapshots and backups!
+
+## Source Code
+
+Longhorn is 100% open source software. Project source code is spread across a number of repos:
+
+1. Longhorn Engine -- Core controller/replica logic https://github.com/rancher/longhorn-engine
+2. Longhorn Manager -- Longhorn orchestration, includes Flexvolume driver for Kubernetes https://github.com/rancher/longhorn-manager
+3. Longhorn UI -- Dashboard https://github.com/rancher/longhorn-ui
+
+## Prerequisites
+
+1. Docker v1.13+
+2. Kubernetes v1.8+
+3. Make sure `curl`, `findmnt`, `grep`, `awk` and `blkid` has been installed in all nodes of the Kubernetes cluster.
+4. Make sure `open-iscsi` has been installed in all nodes of the Kubernetes cluster. For GKE, recommended Ubuntu as guest OS image since it contains `open-iscsi` already.
+
+## Uninstall Longhorn
+
+In order to uninstall Longhorn, user need to remove all the volumes first:
+```
+kubectl -n longhorn-system delete lhv --all
+```
+
+After confirming all the volumes are removed, then Longhorn can be easily uninstalled using:
+```
+kubectl delete -f https://raw.githubusercontent.com/rancher/longhorn/master/deploy/longhorn.yaml
+```
+
+## Troubleshooting
+
+### Volume can be attached/detached from UI, but Kubernetes Pod/StatefulSet etc cannot use it
+
+Check if volume plugin directory has been set correctly.
+
+By default, Kubernetes use `/usr/libexec/kubernetes/kubelet-plugins/volume/exec/` as the directory for volume plugin drivers, as stated in the [official document](https://github.com/kubernetes/community/blob/master/contributors/devel/flexvolume.md#prerequisites).
+
+But some vendors may choose to change the directory due to various reasons. For example, GKE uses `/home/kubernetes/flexvolume` instead.
+
+User can find the correct directory by running `ps aux|grep kubelet` on the host and check the `--volume-plugin-dir` parameter. If there is none, the default `/usr/libexec/kubernetes/kubelet-plugins/volume/exec/` will be used.
+
+---
+Please see [link](https://github.com/rancher/longhorn) for more information.

proposed/longhorn/questions.yml

+questions:
+- variable: service.ui.type
+  default: "NodePort"
+  description: "define Longhorn ui service type"
+  type: enum
+  options:
+    - "NodePort"
+    - "ClusterIP"
+    - "LoadBalancer"
+  label: Longhorn UI Service
+- variable: service.manager.type
+  default: "ClusterIP"
+  description: "define Longhorn manager service type"
+  type: enum
+  options:
+    - "NodePort"
+    - "ClusterIP"
+  label: Longhorn Manager Service
+- variable: persistence.defaultClass
+  default: "true"
+  description: "set as default Storage Class"
+  type: enum
+  options:
+    - "true"
+    - "false"
+  required: true
+  label: Default Storage Class
+- variable: persistence.flexvolumePath
+  default: ""
+  description: " for GKE uses /home/kubernetes/flexvolume/ instead, User can find the correct directory by running ps aux|grep kubelet on the host and check the --volume-plugin-dir parameter.  If there is none, the default /usr/libexec/kubernetes/kubelet-plugins/volume/exec/ will be used."
+  type: string
+  label: Longhorn Flexvolume Path

proposed/longhorn/templates/NOTES.txt

+1. Get the application URL by running these commands:
+  kubectl get po -n $release_namespace

proposed/longhorn/templates/_helpers.tpl

+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "longhorn.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 "longhorn.fullname" -}}
+{{- $name := default .Chart.Name .Values.nameOverride -}}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+
+{{- define "longhorn.managerIP" -}}
+{{- $fullname := (include "longhorn.fullname" .) -}}
+{{- printf "http://%s-backend:9500" $fullname | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

proposed/longhorn/templates/clusterrole.yaml

+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRole
+metadata:
+  name: longhorn-role
+rules:
+- apiGroups:
+  - apiextensions.k8s.io
+  resources:
+  - customresourcedefinitions
+  verbs:
+  - "*"
+- apiGroups: [""]
+  resources: ["pods", "events", "persistentvolumes", "persistentvolumeclaims", "nodes", "proxy/nodes"]
+  verbs: ["*"]
+- apiGroups: ["extensions"]
+  resources: ["daemonsets"]
+  verbs: ["*"]
+- apiGroups: ["batch"]
+  resources: ["jobs", "cronjobs"]
+  verbs: ["*"]
+- apiGroups: ["storage.k8s.io"]
+  resources: ["storageclasses"]
+  verbs: ["*"]
+- apiGroups: ["longhorn.rancher.io"]
+  resources: ["nodes"]
+  verbs: ["*"]
+- apiGroups: ["longhorn.rancher.io"]
+  resources: ["volumes"]
+  verbs: ["*"]
+- apiGroups: ["longhorn.rancher.io"]
+  resources: ["engines"]
+  verbs: ["*"]
+- apiGroups: ["longhorn.rancher.io"]
+  resources: ["replicas"]
+  verbs: ["*"]
+- apiGroups: ["longhorn.rancher.io"]
+  resources: ["settings"]
+  verbs: ["*"]

proposed/longhorn/templates/clusterrolebinding.yaml

+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: longhorn-bind
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: longhorn-role
+subjects:
+- kind: ServiceAccount
+  name: longhorn-service-account
+  namespace: {{ .Release.Namespace }}

proposed/longhorn/templates/crds.yaml

+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  labels:
+    longhorn-manager: Engine
+  name: engines.longhorn.rancher.io
+spec:
+  group: longhorn.rancher.io
+  names:
+    kind: Engine
+    listKind: EngineList
+    plural: engines
+    shortNames:
+    - lhe
+    singular: engine
+  scope: Namespaced
+  version: v1alpha1
+---
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  labels:
+    longhorn-manager: Replica
+  name: replicas.longhorn.rancher.io
+spec:
+  group: longhorn.rancher.io
+  names:
+    kind: Replica
+    listKind: ReplicaList
+    plural: replicas
+    shortNames:
+    - lhr
+    singular: replica
+  scope: Namespaced
+  version: v1alpha1
+---
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  labels:
+    longhorn-manager: Setting
+  name: settings.longhorn.rancher.io
+spec:
+  group: longhorn.rancher.io
+  names:
+    kind: Setting
+    listKind: SettingList
+    plural: settings
+    shortNames:
+    - lhs
+    singular: setting
+  scope: Namespaced
+  version: v1alpha1
+---
+apiVersion: apiextensions.k8s.io/v1beta1
+kind: CustomResourceDefinition
+metadata:
+  labels:
+    longhorn-manager: Volume
+  name: volumes.longhorn.rancher.io
+spec:
+  group: longhorn.rancher.io
+  names:
+    kind: Volume
+    listKind: VolumeList
+    plural: volumes
+    shortNames:
+    - lhv
+    singular: volume
+  scope: Namespaced
+  version: v1alpha1

proposed/longhorn/templates/daemonset-sa.yaml

+apiVersion: extensions/v1beta1
+kind: DaemonSet
+metadata:
+  labels:
+    app: longhorn-manager
+  name: longhorn-manager
+  namespace: {{ .Release.Namespace }}
+spec:
+  template:
+    metadata:
+      labels:
+        app: longhorn-manager
+    spec:
+      initContainers:
+      - name: init-container
+        image: {{ .Values.image.longhorn.engine }}
+        command: ['sh', '-c', 'cp /usr/local/bin/* /data/']
+        volumeMounts:
+        - name: execbin
+          mountPath: /data/
+      containers:
+      - name: longhorn-manager
+        image: {{ .Values.image.longhorn.manager }}
+        imagePullPolicy: Always
+        securityContext:
+          privileged: true
+        command:
+        - longhorn-manager
+        - -d
+        - daemon
+        - --engine-image
+        - {{ .Values.image.longhorn.engine }}
+        - --manager-image
+        - {{ .Values.image.longhorn.manager }}
+        - --service-account
+        - longhorn-service-account
+        ports:
+        - containerPort: 9500
+          name: manager
+        volumeMounts:
+        - name: dev
+          mountPath: /host/dev/
+        - name: proc
+          mountPath: /host/proc/
+        - name: varrun
+          mountPath: /var/run/
+        - name: longhorn
+          mountPath: /var/lib/rancher/longhorn/
+        - name: execbin
+          mountPath: /usr/local/bin/
+        env:
+        - name: POD_NAMESPACE
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.namespace
+        - name: POD_IP
+          valueFrom:
+            fieldRef:
+              fieldPath: status.podIP
+        - name: NODE_NAME
+          valueFrom:
+            fieldRef:
+              fieldPath: spec.nodeName
+        - name: LONGHORN_BACKEND_SVC
+          value: longhorn-backend
+      volumes:
+      - name: dev
+        hostPath:
+          path: /dev/
+      - name: proc
+        hostPath:
+          path: /proc/
+      - name: varrun
+        hostPath:
+          path: /var/run/
+      - name: longhorn
+        hostPath:
+          path: /var/lib/rancher/longhorn/
+      - name: execbin
+        emptyDir: {}
+      serviceAccountName: longhorn-service-account
+---
+kind: Service
+apiVersion: v1
+metadata:
+  labels:
+    app: longhorn-manager
+  name: longhorn-backend
+  namespace: {{ .Release.Namespace }}
+spec:
+  type: {{ .Values.service.manager.type }}
+  sessionAffinity: ClientIP
+  selector:
+    app: longhorn-manager
+  ports:
+  - name: manager
+    port: 9500
+    targetPort: manager

proposed/longhorn/templates/deployment-driver.yaml

+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  name: longhorn-flexvolume-driver-deployer
+  namespace: {{ .Release.Namespace }}
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: longhorn-flexvolume-driver-deployer
+    spec:
+      containers:
+        - name: longhorn-flexvolume-driver-deployer
+          image: {{ .Values.image.longhorn.manager }}
+          imagePullPolicy: Always
+          command:
+          - longhorn-manager
+          - -d
+          - deploy-flexvolume-driver
+          - --manager-image
+          - {{ .Values.image.longhorn.manager }}
+          env:
+          - name: POD_NAMESPACE
+            valueFrom:
+              fieldRef:
+                fieldPath: metadata.namespace
+          - name: NODE_NAME
+            valueFrom:
+              fieldRef:
+                fieldPath: spec.nodeName
+          - name: FLEXVOLUME_DIR
+            value: {{ .Values.persistence.flexvolumePath }}
+      serviceAccountName: longhorn-service-account

proposed/longhorn/templates/deployment-ui.yaml

+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+  labels:
+    app: {{ .Release.Namespace }}-ui
+  name: longhorn-ui
+  namespace: {{ .Release.Namespace }}
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: {{ .Release.Namespace }}-ui
+    spec:
+      containers:
+      - name: longhorn-ui
+        image: {{ .Values.image.longhorn.ui }}
+        ports:
+        - containerPort: 8000
+          name: longhorn-ui
+        env:
+          - name: LONGHORN_MANAGER_IP
+            value: "http://longhorn-backend:9500"
+---
+kind: Service
+apiVersion: v1
+metadata:
+  labels:
+    app: {{ .Release.Namespace }}-ui
+  name: longhorn-frontend
+  namespace: {{ .Release.Namespace }}
+spec:
+  selector:
+    app: {{ .Release.Namespace }}-ui
+  ports:
+  - name: longhorn-ui
+    port: 80
+    targetPort: longhorn-ui
+  type: {{ .Values.service.ui.type }}

proposed/longhorn/templates/serviceaccount.yaml

+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: longhorn-service-account

proposed/longhorn/templates/storageclass.yaml

+kind: StorageClass
+apiVersion: storage.k8s.io/v1
+metadata:
+  name: longhorn
+  {{- if .Values.persistence.defaultClass }}
+  annotations:
+    storageclass.beta.kubernetes.io/is-default-class: "true"
+  {{- else }}
+  annotations:
+    storageclass.beta.kubernetes.io/is-default-class: "false"
+  {{- end }}
+provisioner: rancher.io/longhorn
+parameters:
+  numberOfReplicas: "3"
+  staleReplicaTimeout: "30"
+  fromBackup: ""

proposed/longhorn/values.yaml

+# Default values for longhorn.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+image:
+  longhorn:
+    engine: rancher/longhorn-engine:de88734
+    manager: rancher/longhorn-manager:1ebf5cb
+    ui: rancher/longhorn-ui:1455f4f
+  pullPolicy: Always
+
+service:
+  ui:
+    type: NodePort
+  manager:
+    type: ClusterIP
+
+persistence:
+  # for GKE uses /home/kubernetes/flexvolume/ instead, User can find the correct directory by running ps aux|grep kubelet on the host and check the --volume-plugin-dir parameter. 
+  # If there is none, the default /usr/libexec/kubernetes/kubelet-plugins/volume/exec/ will be used.
+  flexvolumePath: 
+  defaultClass: true
+
+resources: {}
+  # We usually recommend not to specify default resources and to leave this as a conscious
+  # choice for the user. This also increases chances charts run on environments with little
+  # resources, such as Minikube. If you do want to specify resources, uncomment the following
+  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
+  # limits:
+  #  cpu: 100m
+  #  memory: 128Mi
+  # requests:
+  #  cpu: 100m
+  #  memory: 128Mi