Adds helm chart for heptio/ark

incubator/ark-server/.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

incubator/ark-server/Chart.yaml

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+apiVersion: v1
+appVersion: "1.0"
+description: A Helm chart for ark-server
+name: ark-server
+version: 0.7.0
+sources:
+- https://github.com/heptio/ark
+maintainers:
+- name: domcar
+  email: d-caruso@hotmail.it

incubator/ark-server/README.md

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+# Ark-server
+
+This helm chart install ark-server version v0.7.0
+
+## Premise
+Helm cannot handle properly CRD becauses it has a validation mechanism that checks the installation before the CRD are actually created,
+hence each resource that uses a CRD cannot be validated because the CRD doesn't exist yet!
+
+The trick here is to create CRD via helm chart, and only after (using a `post-install`) to install the resources with a container.
+The container has the only job to execute a `kubectl create -f filename` and create the resources.
+
+At the same time the resources created with the hook are completely transparent to Helm, that is, when you delete the
+chart those resources remain there. Hence we need a sencond hook for deleting them (see delete.yaml)
+
+## Content
+- `templates/prerequisites.yaml` this file contains the CRD and SA needed by Ark Server
+- `hook.yaml` This is the container that will deploy or delete ark-server and its configuration
+   it creates also the necessary SA and RBAC
+- `configmap.yaml` Configmap will be mounted to the hook container as a file and subsequently used as k8s manifest for deploy or deletion
+
+## ConfigMap customization
+Since we want to have a customizable chart it's important that the configmap is a template and not a static file.
+To do this we add the keyword `tpl` when reading the file
+- {{ (tpl (.Files.Glob "static/*").AsConfig .) | indent 2 }}
+
+
+## Prerequisites
+
+### Heptio Secret
+Ark server needs a IAM service accoutn in order to run, if you don't have it you must create it: 
+https://github.com/heptio/ark/blob/v0.6.0/docs/cloud-provider-specifics.md#gcp
+
+
+And then
+```
+kubectl create secret generic cloud-credentials --namespace heptio-ark --from-file cloud=credentials-ark
+```
+
+### Bucket and Project name
+Please change bucket and project/region name in the values.yaml file
+See here for possible values: https://github.com/heptio/ark/blob/v0.6.0/docs/cloud-provider-specifics.md
+
+## How to
+```
+helm install --name ark-server --namespace heptio-ark ./ark-server
+```

incubator/ark-server/static/01-config-deploy.yaml

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+---
+apiVersion: ark.heptio.com/v1
+kind: Config
+metadata:
+  namespace: {{ .Values.namespace.name }}
+  name: default
+persistentVolumeProvider:
+  name: {{ required "PLEASE SET VALUE" .Values.configuration.cloudprovider  }}
+  config:
+    {{- if eq .Values.configuration.cloudprovider "gcp" }}
+    project: {{ required "PLEASE SET VALUE" .Values.configuration.project  }}
+    {{- else if eq .Values.configuration.cloudprovider "aws" }}
+    region: {{ required "PLEASE SET VALUE" .Values.configuration.region  }}
+    {{- end }}
+backupStorageProvider:
+  name: {{ required "PLEASE SET VALUE" .Values.configuration.cloudprovider  }}
+  bucket: {{ required "PLEASE SET VALUE" .Values.configuration.bucket  }}
+  {{- if eq .Values.configuration.cloudprovider "aws" }}
+  config:
+    region: {{ required "PLEASE SET VALUE" .Values.configuration.region  }}
+  {{- end }}
+backupSyncPeriod: {{ .Values.configuration.backupSyncPeriod }}
+gcSyncPeriod: {{ .Values.configuration.gcSyncPeriod }}
+scheduleSyncPeriod: {{ .Values.configuration.scheduleSyncPeriod }}
+restoreOnlyMode: {{ .Values.configuration.restoreOnlyMode }}
+
+---
+apiVersion: apps/v1beta1
+kind: Deployment
+metadata:
+  namespace: {{ .Values.namespace.name }}
+  name: ark
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        component: ark
+    spec:
+      restartPolicy: Always
+      serviceAccountName: ark
+      containers:
+        - name: ark
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          command:
+            - /ark
+          args:
+            - server
+          volumeMounts:
+            - name: cloud-credentials
+              mountPath: /credentials
+            - name: plugins
+              mountPath: /plugins
+          env:
+            - name: {{ required "PLEASE CHANGE VALUE" .Values.configuration.credentials }}
+              value: /credentials/cloud
+      volumes:
+        - name: cloud-credentials
+          secret:
+            secretName: {{ .Values.secret.name }}
+        - name: plugins
+          emptyDir: {}

incubator/ark-server/templates/NOTES.txt

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+Check that the ark-server is up and running:
+kubectl get pod --namespace {{ .Values.namespace.name }}
+
+Check that the secret has been created:
+kubectl get secret --namespace {{ .Values.namespace.name }} {{ .Values.secret.name }}
+
+Once ark server is up and running you need the client before you can use it
+1. wget https://github.com/heptio/ark/releases/download/{{ .Values.image.tag }}/ark-{{ .Values.image.tag }}-darwin-amd64.tar.gz
+2. tar -xvf ark-{{ .Values.image.tag }}-darwin-amd64.tar.gz -C ark-client
+
+More info on the official site: https://github.com/heptio/ark#install-client

incubator/ark-server/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "ark-server.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 "ark-server.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 "ark-server.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create the name of the service account to use for deploying or deleting
+*/}}
+{{- define "ark-server.hookSA" -}}
+{{- if .Values.serviceAccount.hook.create -}}
+    {{ default (include "ark-server.fullname" .) .Values.serviceAccount.hook.name }}
+{{- else -}}
+    {{ default "default" .Values.serviceAccount.hook.name }}
+{{- end -}}
+{{- end -}}

incubator/ark-server/templates/configmap.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: ark-server-config
+  namespace: {{ .Values.namespace.name }}
+data:
+{{ (tpl (.Files.Glob "static/*").AsConfig .) | indent 2 }}

incubator/ark-server/templates/hooks.yaml

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+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: deploy-ark
+  namespace: {{ .Values.namespace.name }}
+  annotations:
+    "helm.sh/hook": post-install
+    "helm.sh/hook-delete-policy": hook-succeeded
+spec:
+  template:
+    metadata:
+      name: deploy-ark
+      namespace: {{ .Values.namespace.name }}
+    spec:
+      restartPolicy: Never
+      containers:
+      - name: deploy-ark
+        image: claranet/gcloud-kubectl-docker
+        imagePullPolicy: Always
+        command: ["kubectl","create","-f","/tmp/"]
+        volumeMounts:
+          - name: ark-server-config
+            mountPath: /tmp
+      volumes:
+        - name: ark-server-config
+          configMap:
+            name: ark-server-config
+      serviceAccountName: {{ template "ark-server.hookSA" . }}
+---
+apiVersion: batch/v1
+kind: Job
+metadata:
+  name: delete-ark
+  namespace: {{ .Values.namespace.name }}
+  annotations:
+    "helm.sh/hook": pre-delete
+    "helm.sh/hook-delete-policy": hook-succeeded
+spec:
+  template:
+    metadata:
+      name: delete-ark
+      namespace: {{ .Values.namespace.name }}
+    spec:
+      restartPolicy: Never
+      containers:
+      - name: delete-ark
+        image: claranet/gcloud-kubectl-docker
+        imagePullPolicy: Always
+        command: ["kubectl","delete","-f","/tmp/"]
+        volumeMounts:
+          - name: ark-server-config
+            mountPath: /tmp
+      volumes:
+        - name: ark-server-config
+          configMap:
+            name: ark-server-config
+      serviceAccountName: {{ template "ark-server.hookSA" . }}
+
+{{- if .Values.serviceAccount.hook.create }}
+---
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ template "ark-server.hookSA" . }}
+  namespace: {{ .Values.namespace.name }}
+  labels:
+    chart: {{ .Chart.Name }}-{{ .Chart.Version }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+    app: {{ template "ark-server.name" . }}
+{{- end }}
+
+{{- if .Values.rbac.create }}
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRole
+metadata:
+  annotations:
+    rbac.authorization.kubernetes.io/autoupdate: "true"
+  labels:
+    kubernetes.io/bootstrapping: rbac-defaults
+    chart: {{ .Chart.Name }}-{{ .Chart.Version }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+    app: {{ template "ark-server.name" . }}
+  name: deploy-ark
+rules:
+- apiGroups: ['']
+  resources: ['pods','deployments']
+  verbs: ['*']
+- apiGroups: ['extensions','apps']
+  resources: ['deployments','replicasets']
+  verbs: ['*']
+- apiGroups: ['ark.heptio.com']
+  verbs: ["*"]
+  resources: ["*"]
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: deploy-ark
+  labels:
+    chart: {{ .Chart.Name }}-{{ .Chart.Version }}
+    heritage: {{ .Release.Service }}
+    release: {{ .Release.Name }}
+    app: {{ template "ark-server.name" . }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: deploy-ark
+subjects:
+- kind: ServiceAccount
+  name: {{ template "ark-server.hookSA" . }}
+  namespace: {{ .Values.namespace.name }}
+{{- end }}