Added a chart for Percona Server (#860)

stable/percona/.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/percona/Chart.yaml

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+name: percona 
+version: 0.1.0
+description: free, fully compatible, enhanced, open source drop-in replacement for MySQL
+keywords:
+- mysql
+- percona
+- database
+- sql
+home: https://www.percona.com/
+icon: https://www.percona.com/sites/all/themes/percona2015/logo.png
+sources:
+- https://github.com/kubernetes/charts
+- https://github.com/docker-library/percona
+maintainers:
+- name: Patrick Galbraith
+ email: [email protected] 
+engine: gotpl

stable/percona/README.md

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+# Percona 
+
+[Percona Server](https://MySQL.org) for MySQL® is a free, fully compatible, enhanced, open source drop-in replacement for MySQL that provides superior performance, scalability and instrumentation. With over 3,000,000 downloads, Percona Server for MySQL's self-tuning algorithms and support for extremely high-performance hardware delivers excellent performance and reliability. 
+
+Notable users include Netflix, Amazon Web Services, Alcatel-Lucent, and Smug Mug.
+
+## Introduction
+
+This chart, based off of the MySQL chart, bootstraps a single node Percona Server deployment on a [Kubernetes](http:https://kubernetes.io) cluster using the [Helm](https://helm.sh) package manager.
+
+## Prerequisites
+
+- Kubernetes 1.4+ with Beta APIs enabled
+- PV provisioner support in the underlying infrastructure
+
+## Installing the Chart
+
+To install the chart with the release name `my-release`:
+
+```bash
+$ helm install --name my-release stable/percona
+```
+
+The command deploys Percona Server on the Kubernetes cluster in the default configuration. The [configuration](#configuration) section lists the parameters that can be configured during installation.
+
+By default a random password will be generated for the root user. If you'd like to set your own password change the perconaRootPassword
+in the values.yaml.
+
+You can retrieve your root password by running the following command. Make sure to replace [YOUR_RELEASE_NAME]:
+
+ printf $(printf '\%o' `kubectl get secret [YOUR_RELEASE_NAME]-percona -o jsonpath="{.data.mysql-root-password[*]}"`)
+
+> **Tip**: List all releases using `helm list`
+
+## Uninstalling the Chart
+
+To uninstall/delete the `my-release` deployment:
+
+```bash
+$ 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 Percona chart and their default values.
+
+| Parameter | Description | Default |
+| ----------------------- | ---------------------------------- | ---------------------------------------------------------- |
+| `imageTag` | `percona` image tag. | Most recent release |
+| `imagePullPolicy` | Image pull policy | `IfNotPresent` |
+| `perconaRootPassword` | Password for the `root` user. | `nil` |
+| `perconaUser` | Username of new user to create. | `nil` |
+| `perconaPassword` | Password for the new user. | `nil` |
+| `perconaDatabase` | Name for new database to create. | `nil` |
+| `persistence.enabled` | Create a volume to store data | true |
+| `persistence.size` | Size of persistent volume claim | 8Gi RW |
+| `persistence.storageClass` | Type of persistent volume claim | nil (uses alpha storage class annotation) |
+| `persistence.accessMode` | ReadWriteOnce or ReadOnly | ReadWriteOnce |
+| `resources` | CPU/Memory resource requests/limits | Memory: `256Mi`, CPU: `100m` |
+
+Some of the parameters above map to the env variables defined in the [Percona Server DockerHub image](https://hub.docker.com/_/percona/).
+
+Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,
+
+```bash
+$ helm install --name my-release \
+ --set mysqlLRootPassword=secretpassword,mysqlUser=my-user,mysqlPassword=my-password,mysqlDatabase=my-database \
+ stable/percona
+```
+
+The above command sets the MySQL `root` account password to `secretpassword`. Additionally it creates a standard database user named `my-user`, with the password `my-password`, who has access to a database named `my-database`.
+
+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 -f values.yaml stable/percona
+```
+
+> **Tip**: You can use the default [values.yaml](values.yaml)
+
+## Persistence
+
+The [Percona Server](https://hub.docker.com/_/percona/) image stores the MySQL data and configurations at the `/var/lib/mysql` path of the container.
+
+By default a PersistentVolumeClaim is created and mounted into that directory. In order to disable this functionality
+you can change the values.yaml to disable persistence and use an emptyDir instead.
+
+> *"An emptyDir volume is first created when a Pod is assigned to a Node, and exists as long as that Pod is running on that node. When a Pod is removed from a node for any reason, the data in the emptyDir is deleted forever."*

stable/percona/templates/NOTES.txt

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+Percona can be accessed via port 3306 on the following DNS name from within your cluster:
+{{ template "fullname" . }}.{{ .Release.Namespace }}.svc.cluster.local
+
+To get your root password run:
+
+ kubectl get secret --namespace {{ .Release.Namespace }} {{ template "fullname" . }} -o jsonpath="{.data.mysql-root-password}" | base64 --decode; echo
+
+To connect to your database:
+
+1. Run a percona pod that you can use as a client:
+
+ kubectl run -i --tty percona-client --image=percona:5.7 --restart=Never -- bash -il
+
+2. Connect using the mysql cli, then provide your password:
+ $ mysql -h {{ template "fullname" . }} -p
+

stable/percona/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 24 | trimSuffix "-" -}}
+{{- end -}}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 24 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 24 | trimSuffix "-" -}}
+{{- end -}}

stable/percona/templates/deployment.yaml

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+apiVersion: extensions/v1beta1
+kind: Deployment
+metadata:
+ name: {{ template "fullname" . }}
+ labels:
+ app: {{ template "fullname" . }}
+ chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+ release: "{{ .Release.Name }}"
+ heritage: "{{ .Release.Service }}"
+spec:
+ template:
+ metadata:
+ labels:
+ app: {{ template "fullname" . }}
+ annotations:
+ pod.beta.kubernetes.io/init-containers: '[
+ {
+ "name": "remove-lost-found",
+ "image": "busybox:1.25.0",
+ "command": ["rm", "-fr", "/var/lib/mysql/lost+found"],
+ "volumeMounts": [
+ {
+ "name": "data",
+ "mountPath": "/var/lib/mysql"
+ }
+ ],
+ "imagePullPolicy": {{ .Values.imagePullPolicy | quote }}
+ }
+ ]'
+ spec:
+ containers:
+ - name: {{ template "fullname" . }}
+ image: "mysql:{{ .Values.imageTag }}"
+ imagePullPolicy: {{ .Values.imagePullPolicy | quote }}
+ resources:
+{{ toYaml .Values.resources | indent 10 }}
+ env:
+ {{- if .Values.mysqlAllowEmptyPassword }}
+ - name: MYSQL_ALLOW_EMPTY_PASSWORD
+ value: "true"
+ {{- else }}
+ - name: MYSQL_ROOT_PASSWORD
+ valueFrom:
+ secretKeyRef:
+ name: {{ template "fullname" . }}
+ key: mysql-root-password
+ - name: MYSQL_PASSWORD
+ valueFrom:
+ secretKeyRef:
+ name: {{ template "fullname" . }}
+ key: mysql-password
+ {{- end }}
+ - name: MYSQL_USER
+ value: {{ default "" .Values.mysqlUser | quote }}
+ - name: MYSQL_DATABASE
+ value: {{ default "" .Values.mysqlDatabase | quote }}
+ ports:
+ - name: mysql
+ containerPort: 3306
+ livenessProbe:
+ exec:
+ command:
+ - mysqladmin
+ - ping
+ initialDelaySeconds: 30
+ timeoutSeconds: 5
+ readinessProbe:
+ exec:
+ command:
+ - mysqladmin
+ - ping
+ initialDelaySeconds: 5
+ timeoutSeconds: 1
+ volumeMounts:
+ - name: data
+ mountPath: /var/lib/mysql
+ volumes:
+ - name: data
+ {{- if .Values.persistence.enabled }}
+ persistentVolumeClaim:
+ claimName: {{ template "fullname" . }}
+ {{- else }}
+ emptyDir: {}
+ {{- end -}}

stable/percona/templates/pvc.yaml

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+{{- if .Values.persistence.enabled }}
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+ name: {{ template "fullname" . }}
+ labels:
+ app: {{ template "fullname" . }}
+ chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+ release: "{{ .Release.Name }}"
+ heritage: "{{ .Release.Service }}"
+ annotations:
+ {{- if .Values.persistence.storageClass }}
+ volume.beta.kubernetes.io/storage-class: {{ .Values.persistence.storageClass | quote }}
+ {{- else }}
+ volume.alpha.kubernetes.io/storage-class: default
+ {{- end }}
+spec:
+ accessModes:
+ - {{ .Values.persistence.accessMode | quote }}
+ resources:
+ requests:
+ storage: {{ .Values.persistence.size | quote }}
+{{- end }}

stable/percona/templates/secrets.yaml

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+apiVersion: v1
+kind: Secret
+metadata:
+ name: {{ template "fullname" . }}
+ labels:
+ app: {{ template "fullname" . }}
+ chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+ release: "{{ .Release.Name }}"
+ heritage: "{{ .Release.Service }}"
+type: Opaque
+data:
+ {{ if .Values.mysqlRootPassword }}
+ mysql-root-password: {{ .Values.mysqlRootPassword | b64enc | quote }}
+ {{ else }}
+ mysql-root-password: {{ randAlphaNum 10 | b64enc | quote }}
+ {{ end }}
+ {{ if .Values.mysqlPassword }}
+ mysql-password: {{ .Values.mysqlPassword | b64enc | quote }}
+ {{ else }}
+ mysql-password: {{ randAlphaNum 10 | b64enc | quote }}
+ {{ end }}

stable/percona/templates/svc.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+ name: {{ template "fullname" . }}
+ labels:
+ app: {{ template "fullname" . }}
+ chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+ release: "{{ .Release.Name }}"
+ heritage: "{{ .Release.Service }}"
+spec:
+ ports:
+ - name: mysql
+ port: 3306
+ targetPort: mysql
+ selector:
+ app: {{ template "fullname" . }}

stable/percona/values.yaml

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+## percona image version
+## ref: https://hub.docker.com/r/library/percona/tags/
+##
+imageTag: "5.7.17"
+
+## Specify password for root user
+##
+## Default: random 10 character string
+# mysqlRootPassword: testing
+
+## Create a database user
+##
+# mysqlUser:
+# mysqlPassword:
+
+## Allow unauthenticated access, uncomment to enable
+##
+# mysqlAllowEmptyPassword: true
+
+## Create a database
+##
+# mysqlDatabase:
+
+## Specify an imagePullPolicy (Required)
+## It's recommended to change this to 'Always' if the image tag is 'latest'
+## ref: http:https://kubernetes.io/docs/user-guide/images/#updating-images
+##
+imagePullPolicy: IfNotPresent
+
+## Persist data to a persitent volume
+persistence:
+ enabled: false 
+ ## If defined, volume.beta.kubernetes.io/storage-class: <storageClass>
+ ## Default: volume.alpha.kubernetes.io/storage-class: default
+ ##
+ # storageClass:
+ accessMode: ReadWriteOnce
+ size: 8Gi
+
+## Configure resource requests and limits
+## ref: http:https://kubernetes.io/docs/user-guide/compute-resources/
+##
+resources:
+ requests:
+ memory: 256Mi
+ cpu: 100m