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+hero: Gollum - A recipe for your own git-based wiki
+
+# Gollum
+
+Gollum is a simple wiki system built on top of Git. A Gollum Wiki is simply a git repository (_either bare or regular_) of a specific nature:
+
+* A Gollum repository's contents are human-editable, unless the repository is bare.
+* Pages are unique text files which may be organized into directories any way you choose.
+* Other content can also be included, for example images, PDFs and headers/footers for your pages.
+
+Gollum pages:
+
+* May be written in a variety of markups.
+* Can be edited with your favourite system editor or IDE (_changes will be visible after committing_) or with the built-in web interface.
+* Can be displayed in all versions (_commits_).
+
+
+![Gollum Screenshot](../images/gollum.png)
+
+As you'll note in the (_real world_) screenshot above, my requirements for a personal wiki are:
+
+* Portable across my devices
+* Supports images
+* Full-text search
+* Supports inter-note links
+* Revision control
+
+Gollum meets all these requirements, and as an added bonus, is extremely fast and lightweight.
+
+!!! note
+    Since Gollum itself offers no user authentication, this design secures gollum behind an [oauth2 proxy](/reference/oauth_proxy/), so that in order to gain access to the Gollum UI at all, oauth2 authentication (_to GitHub, GitLab, Google, etc_) must have already occurred.
+
+
+## Ingredients
+
+1. [Docker swarm cluster](/ha-docker-swarm/design/) with [persistent shared storage](/ha-docker-swarm/shared-storage-ceph.md)
+2. [Traefik](/ha-docker-swarm/traefik) configured per design
+
+## Preparation
+
+### Setup data locations
+
+We'll need an empty git repository in /var/data/gollum for our data:
+
+```
+mkdir /var/data/gollum
+cd /var/data/gollum
+git init
+```
+
+### Prepare environment
+
+1. Choose an oauth provider, and obtain a client ID and secret
+2. Create gollum.env, and populate with the following variables (_you can make the cookie secret whatever you like_)
+
+```
+OAUTH2_PROXY_CLIENT_ID=
+OAUTH2_PROXY_CLIENT_SECRET=
+OAUTH2_PROXY_COOKIE_SECRET=
+```
+
+### Setup Docker Swarm
+
+Create a docker swarm config file in docker-compose syntax (v3), something like this:
+
+!!! tip
+        I share (_with my [patreon patrons](https://www.patreon.com/funkypenguin)_) a private "_premix_" git repository, which includes necessary docker-compose and env files for all published recipes. This means that patrons can launch any recipe with just a ```git pull``` and a ```docker stack deploy``` 👍
+```
+version: '3'
+
+services:
+  app:
+    image: dakue/gollum
+    volumes:
+     - /var/data/gollum:/gollum
+    networks:
+    - internal
+    command: |
+      --allow-uploads
+      --emoji
+      --user-icons gravatar
+
+  proxy:
+    image: a5huynh/oauth2_proxy
+    env_file : /var/data/config/gollum/gollum.env
+    networks:
+      - internal
+      - traefik_public
+    deploy:
+      labels:
+        - traefik.frontend.rule=Host:gollum.example.com
+        - traefik.docker.network=traefik_public
+        - traefik.port=4180
+    volumes:
+      - /var/data/config/gollum/authenticated-emails.txt:/authenticated-emails.txt
+    command: |
+      -cookie-secure=false
+      -upstream=http://app:4567
+      -redirect-url=https://gollum.example.com
+      -http-address=http://0.0.0.0:4180
+      -email-domain=example.com
+      -provider=github
+      -authenticated-emails-file=/authenticated-emails.txt
+
+networks:
+  traefik_public:
+    external: true
+  internal:
+    driver: overlay
+    ipam:
+      config:
+        - subnet: 172.16.9.0/24
+```
+
+!!! note
+    Setup unique static subnets for every stack you deploy. This avoids IP/gateway conflicts which can otherwise occur when you're creating/removing stacks a lot. See [my list](/reference/networks/) here.
+
+
+
+## Serving
+
+### Launch Gollum stack
+
+Launch the Gollum stack by running ```docker stack deploy gollum -c <path-to-docker-compose.yml>```
+
+Authenticate against your OAuth provider, and then start editing your wiki!
+
+## Chef's Notes
+
+1. In the current implementation, Gollum is a "single user" tool only. The contents of the wiki are saved as markdown files under /var/data/gollum, and all the git commits are currently "Anonymous"
+
+### Tip your waiter (donate) 👏
+
+Did you receive excellent service? Want to make your waiter happy? (_..and support development of current and future recipes!_) See the [support](/support/) page for (_free or paid)_ ways to say thank you! 👏
+
+### Your comments? 💬