[gollum] New Chart (#889)

* Added chart for gollum

Signed-off-by: Chris Sanders <sanders.chris@gmail.com>
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apiVersion: v2
appVersion: latest
description: Gollum is a simple wiki system built on top of Git
name: gollum
version: 1.0.0
kubeVersion: ">=1.16.0-0"
keywords:
- gollum
- wiki
home: https://github.com/k8s-at-home/charts/tree/master/charts/stable/gollum
icon: https://gollum.org/icon
sources:
- https://github.com/gollum/gollum
- https://github.com/gollum/docker
maintainers:
- name: chris-sanders
email: sanders.chris@gmail.com
dependencies:
- name: common
repository: https://library-charts.k8s-at-home.com
version: 2.5.0

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# gollum
![Version: 1.0.0](https://img.shields.io/badge/Version-1.0.0-informational?style=flat-square) ![AppVersion: latest](https://img.shields.io/badge/AppVersion-latest-informational?style=flat-square)
gollum helm package
**Homepage:** <https://github.com/k8s-at-home/charts/tree/master/charts/stable/gollum>
## Maintainers
| Name | Email | Url |
| ---- | ------ | --- |
| Chris Sanders | sanders.chris@gmail.com | |
## Source Code
* <https://github.com/gollum/gollum>
* <https://github.com/gollum/docker>
## Requirements
Kubernetes: `>=1.16.0-0`
| Repository | Name | Version |
|------------|------|---------|
| https://library-charts.k8s-at-home.com | common | 2.5.0 |
## Values
| Key | Type | Default | Description |
|-----|------|---------|-------------|
| controllerType | string | `"statefulset"` | |
| gollum.additionalArgs | string | `"--h1-title"` | Additional arguments for starting gollum |
| gollum.config | string | `"# Push and pull on commit\nGollum::Hook.register(:post_commit, :hook_id) do |committer, sha1|\n committer.wiki.repo.git.pull('origin', committer.wiki.ref)\n committer.wiki.repo.git.push('origin', committer.wiki.ref)\nend\n"` | Gollum config.rb customizations reference https://github.com/gollum/gollum#config-file |
| gollum.gitBranch | string | `"master"` | Branch to pull |
| gollum.gitUrl | string | `"https://github.com/k8s-at-home/charts.git"` | Repository URL to pull (accepts access tokens) Ex: https://user:access-token@git.example.com/user/repo.git |
| gollum.syncCommand | string | `"git pull && git push"` | Command run during the sync cron |
| image.pullPolicy | string | `"IfNotPresent"` | |
| image.repository | string | `"gollumorg/gollum"` | gollum upstream image |
| image.tag | string | `"latest"` | |
| ingress.enabled | bool | `false` | |
| persistence.wiki.accessMode | string | `"ReadWriteOnce"` | |
| persistence.wiki.enabled | bool | `false` | |
| persistence.wiki.mountPath | string | `"/wiki"` | |
| persistence.wiki.size | string | `"2Gi"` | |
| service.port.name | string | `"http"` | |
| service.port.port | int | `80` | |
| service.port.targetPort | int | `4567` | |
| service.type | string | `"ClusterIP"` | |
| strategy.type | string | `"RollingUpdate"` | |

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{{- define "custom.repository.organization" -}}
k8s-at-home
{{- end -}}
{{- define "custom.repository.url" -}}
https://github.com/k8s-at-home/charts
{{- end -}}
{{- define "custom.helm.url" -}}
https://k8s-at-home.com/charts/
{{- end -}}
{{- define "custom.helm.path" -}}
{{ template "custom.repository.organization" . }}/{{ template "chart.name" . }}
{{- end -}}
{{- define "custom.notes" -}}
**This chart is not maintained by the upstream project and any issues with the chart should be raised [here](https://github.com/k8s-at-home/charts/issues/new/choose)**
{{- end -}}
{{- define "custom.requirements" -}}
## Requirements
{{ template "chart.kubeVersionLine" . }}
{{- end -}}
{{- define "custom.dependencies" -}}
## Dependencies
{{ template "chart.requirementsTable" . }}
{{- end -}}
{{- define "custom.install.tldr" -}}
## TL;DR
```console
helm repo add {{ template "custom.repository.organization" . }} {{ template "custom.helm.url" . }}
helm repo update
helm install {{ template "chart.name" . }} {{ template "custom.helm.path" . }}
```
{{- end -}}
{{- define "custom.install" -}}
## Installing the Chart
To install the chart with the release name `{{ template "chart.name" . }}`
```console
helm install {{ template "chart.name" . }} {{ template "custom.helm.path" . }}
```
{{- end -}}
{{- define "custom.uninstall" -}}
## Uninstalling the Chart
To uninstall the `{{ template "chart.name" . }}` deployment
```console
helm uninstall {{ template "chart.name" . }}
```
The command removes all the Kubernetes components associated with the chart **including persistent volumes** and deletes the release.
{{- end -}}
{{- define "custom.configuration.header" -}}
## Configuration
{{- end -}}
{{- define "custom.configuration.readValues" -}}
Read through the [values.yaml](./values.yaml) file. It has several commented out suggested values.
Other values may be used from the [values.yaml](https://github.com/k8s-at-home/library-charts/tree/main/charts/stable/common/values.yaml) from the [common library](https://github.com/k8s-at-home/library-charts/tree/main/charts/stable/common).
{{- end -}}
{{- define "custom.configuration.example.set" -}}
Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`.
```console
helm install {{ template "chart.name" . }} \
--set env.TZ="America/New York" \
{{ template "custom.helm.path" . }}
```
{{- end -}}
{{- define "custom.configuration.example.file" -}}
Alternatively, a YAML file that specifies the values for the above parameters can be provided while installing the chart.
```console
helm install {{ template "chart.name" . }} {{ template "custom.helm.path" . }} -f values.yaml
```
{{- end -}}
{{- define "custom.valuesSection" -}}
## Values
**Important**: When deploying an application Helm chart you can add more values from our common library chart [here](https://github.com/k8s-at-home/library-charts/tree/main/charts/stable/common)
{{ template "chart.valuesTable" . }}
{{- end -}}
{{- define "custom.support" -}}
## Support
- See the [Docs](https://docs.k8s-at-home.com/our-helm-charts/introduction/)
- Open an [issue](https://github.com/k8s-at-home/charts/issues/new/choose)
- Ask a [question](https://github.com/k8s-at-home/organization/discussions)
- Join our [Discord](https://discord.gg/sTMX7Vh) community
{{- end -}}
{{ template "chart.header" . }}
{{ template "chart.versionBadge" . }}{{ template "chart.typeBadge" . }}{{ template "chart.appVersionBadge" . }}
{{ template "chart.description" . }}
{{ template "custom.notes" . }}
{{ template "chart.sourcesSection" . }}
{{ template "custom.requirements" . }}
{{ template "custom.dependencies" . }}
{{ template "custom.install.tldr" . }}
{{ template "custom.install" . }}
{{ template "custom.uninstall" . }}
{{ template "custom.configuration.header" . }}
{{ template "custom.configuration.readValues" . }}
{{ template "custom.configuration.example.set" . }}
{{ template "custom.configuration.example.file" . }}
{{ template "custom.custom.configuration" . }}
{{ template "custom.valuesSection" . }}
{{ template "custom.changelog" . }}
{{ template "custom.support" . }}
{{ template "helm-docs.versionFooter" . }}

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{{- define "custom.changelog.header" -}}
## Changelog
{{- end -}}
{{- define "custom.changelog" -}}
{{ template "custom.changelog.header" . }}
All notable changes to this application Helm chart will be documented in this file but does not include changes from our common library. To read those click [here](https://github.com/k8s-at-home/library-charts/tree/main/charts/stable/common#changelog).
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
### [1.0.0]
#### Added
- Initial version
#### Changed
- N/A
#### Removed
- N/A
[1.0.0]: #1.0.0
{{- end -}}

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{{- define "custom.custom.configuration.header" -}}
## Custom configuration
{{- end -}}
{{- define "custom.custom.configuration" -}}
{{ template "custom.custom.configuration.header" . }}
N/A
{{- end -}}

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{{- include "common.notes.defaultNotes" . -}}

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{{/* Gollum Additional Volume Mounts */}}
{{- define "gollum.volumeMounts.config" -}}
mountPath: /config
name: gollum-config
{{- end -}}
{{- define "gollum.volumeMounts.wiki" -}}
mountPath: /wiki
name: wiki
{{- end -}}

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{{/* Gollum Additional Volumes */}}
{{- define "gollum.volume.sync" -}}
name: git-sync
configMap:
name: {{ include "common.names.fullname" . }}
defaultMode: 0755
items:
- key: git-sync
path: git-sync
{{- end -}}
{{- define "gollum.volume.config" -}}
name: gollum-config
configMap:
name: {{ include "common.names.fullname" . }}
defaultMode: 0755
items:
- key: config.rb
path: config.rb
{{- end -}}
{{- define "gollum.volume.wiki" -}}
name: wiki
emptyDir: {}
{{- end -}}

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{{/* Gollum Additional Containers */}}
{{- define "gollum.container.cron" -}}
name: cron
image: alpine/git
command: ["crond", "-f", "-l", "8"]
volumeMounts:
- mountPath: /etc/periodic/15min/
name: git-sync
- mountPath: /wiki
name: wiki
{{- end -}}

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{{/* Gollum Init Containers */}}
{{- define "gollum.init.clone" -}}
name: git-init
image: alpine/git
args:
- clone
- -b
- {{ (required "gollum.gitBranch is required and not set" .Values.gollum.gitBranch) }}
- {{ (required "gollum.gitUrl is required and not set" .Values.gollum.gitUrl) }}
- /wiki
volumeMounts:
- mountPath: /wiki
name: wiki
{{- end -}}
{{- define "gollum.init.clear" -}}
name: clear-wiki
image: alpine
command:
- sh
- -c
- rm -fr /wiki/*; rm -fr /wiki/.*; ls -la /wiki/;
volumeMounts:
- mountPath: /wiki
name: wiki
{{- end -}}

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{{- include "common.values.setup" . }}
{{/* Add initContainers */}}
{{- $initClear := include "gollum.init.clear" . | fromYaml -}}
{{- $initClone := include "gollum.init.clone" . | fromYaml -}}
{{- $initContainers := append .Values.initContainers $initClear -}}
{{- $initContainers = append $initContainers $initClone -}}
{{- $_ := set .Values "initContainers" $initContainers -}}
{{/* Add conatiners */}}
{{- $contCron := include "gollum.container.cron" . | fromYaml -}}
{{- $containers := append .Values.additionalContainers $contCron -}}
{{- $_ := set .Values "additionalContainers" $containers -}}
{{/* Add Volumes */}}
{{- $volSync := include "gollum.volume.sync" . | fromYaml -}}
{{- $volConfig := include "gollum.volume.config" . | fromYaml -}}
{{- $volWiki := include "gollum.volume.wiki" . | fromYaml -}}
{{- $volumes := append .Values.additionalVolumes $volSync -}}
{{- $volumes = append $volumes $volConfig -}}
{{- if (not .Values.persistence.wiki.enabled) -}}
{{- $volumes = append $volumes $volWiki -}}
{{- end -}}
{{- $_ := set .Values "additionalVolumes" $volumes -}}
{{/* Add VolumeMounts */}}
{{- $mntConfig := include "gollum.volumeMounts.config" . | fromYaml -}}
{{- $mntWiki := include "gollum.volumeMounts.wiki" . | fromYaml -}}
{{- $mounts := append .Values.additionalVolumeMounts $mntConfig -}}
{{- if (not .Values.persistence.wiki.enabled) -}}
{{- $mounts = append $mounts $mntWiki -}}
{{- end -}}
{{- $_ := set .Values "additionalVolumeMounts" $mounts -}}
{{/* Setup the start command */}}
{{- $command := list "gollum" "/wiki" "--config" "/config/config.rb" "--ref" (required "A branch is requred but unset" .Values.gollum.gitBranch) -}}
{{- if .Values.gollum.additionalArgs -}}
{{- $command = append $command .Values.gollum.additionalArgs -}}
{{- end -}}
{{- $_ := set .Values "command" $command -}}
{{ include "common.all" . }}

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apiVersion: v1
kind: ConfigMap
metadata:
name: {{ include "common.names.fullname" . }}
data:
git-sync: |
#!/bin/bash
cd /wiki && {{ .Values.gollum.syncCommand }}
config.rb: |
{{- nindent 4 .Values.gollum.config }}

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#
# IMPORTANT NOTE
#
# This chart inherits from our common library chart. You can check the default values/options here:
# https://github.com/k8s-at-home/library-charts/tree/main/charts/stable/common/values.yaml
#
image:
# -- gollum upstream image
repository: gollumorg/gollum
tag: latest
pullPolicy: IfNotPresent
controllerType: statefulset
strategy:
type: RollingUpdate
service:
type: ClusterIP
port:
port: 80
name: http
targetPort: 4567
ingress:
enabled: false
persistence:
wiki:
enabled: false
mountPath: /wiki
accessMode: ReadWriteOnce
size: 2Gi
gollum:
# -- Branch to pull
gitBranch: master
# -- Repository URL to pull (accepts access tokens)
# Ex: https://user:access-token@git.example.com/user/repo.git
gitUrl: https://github.com/k8s-at-home/charts.git
# -- Additional arguments for starting gollum
additionalArgs: --h1-title
# -- Command run during the sync cron
syncCommand: git pull && git push
# -- Gollum config.rb customizations
# reference https://github.com/gollum/gollum#config-file
config: |
# Push and pull on commit
Gollum::Hook.register(:post_commit, :hook_id) do |committer, sha1|
committer.wiki.repo.git.pull('origin', committer.wiki.ref)
committer.wiki.repo.git.push('origin', committer.wiki.ref)
end