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#+TITLE: spacemacs-docker distribution
#+TAGS: distribution|layer|spacemacs
* Table of Contents :TOC_5_gh:noexport:
- [[#description][Description]]
- [[#features][Features:]]
- [[#screenshots][Screenshots]]
- [[#how-to-setup][How to setup]]
- [[#how-to-use][How to use]]
- [[#macos][MacOS]]
- [[#windows][Windows]]
- [[#gnulinux][GNU/Linux]]
- [[#with-xpra-on-any-of-the-oses-and-via-web-browser][With Xpra on any of the OSes and via web-browser]]
- [[#pros][Pros]]
- [[#cons][Cons]]
- [[#instruction][Instruction]]
- [[#with-xpra-desktop-client][With Xpra desktop client]]
- [[#via-web-browser][Via web-browser]]
- [[#some-basic-docker-commands-to-get-you-going][Some basic docker commands to get you going]]
* Description
Spacemacs distribution that aims to automate dependency installation for
Spacemacs layers and provide well tested Docker based development environment
with GUI support on all major platforms and even [[https://i.imgur.com/wDLDMZN.gif][your web browser]].
** Features:
- Automatically get Spacemacs layers dependency installed with [[https://github.com/syl20bnr/spacemacs/blob/develop/layers/%2Bdistributions/spacemacs-docker/deps-install/README.org][installer scripts]]
- Reap the benefit of Emacs and other GNU/Linux tools on Windows/MacOS machines
- Use [[https://hub.docker.com/][docker hub]] to auto-build your environment and store full backups for free
- Build once and work with the same development environment everywhere
- Run untrusted/risky code in the tunable sandbox with CPU/network/disk quotas
- Try new tools, experiment and roll back changes when something goes wrong
- Share your setup with others or extend someone elses development environment
- Run multiple Emacs instances on the same machine isolated
- An easy way to swap Emacs version (=emacs25= =emacs-snapshot=) for debugging
- [[https://docs.docker.com/engine/reference/commandline/pause/][pause]] container to free resources temporarily
- [[https://github.com/docker/docker/blob/1.13.x/experimental/checkpoint-restore.md][Checkpoint & Restore]] - maybe the fastest way to start a “heavy” environment
- Friendly for networks with low upload speed/quotas.
* Screenshots
[[file:img/MAC_SP.jpg]]
[[https://i.imgur.com/VcuqReF.jpg][HD MacOS image]]
[[file:img/LN_SP.jpg]]
[[https://i.imgur.com/yDok0Q7.jpg][HD GNU/Linux image]]
[[file:img/WIN_SP.jpg]]
[[https://i.imgur.com/WmsnCUo.jpg][HD Windows image]]
* How to setup
The idea is to build your own image [[https://docs.docker.com/engine/reference/builder/#from][FROM]] the one of the provided base images
([[https://goo.gl/Rb2Als][spacemacs/emacs25:develop]] and [[https://goo.gl/DFSenZ][spacemacs/emacs-snapshot:develop]]). Get [[https://docs.docker.com/engine/installation][docker]] for the OS of
the machine that will run development environment and then use
[[https://github.com/JAremko/spacemacs-docker-seed][spacemacs-docker-seed]] as an example to create [[https://docs.docker.com/docker-hub/builds/][automated builds on Docker Hub]] or
[[https://docs.docker.com/engine/reference/commandline/build/][build it locally]].
* How to use
With one of the methods below replace =spacemacs/emacs25:develop= with your images.
NOTE: The guide assumes that you want to run Docker and connect to it from
the same machine.
** MacOS
Get [[https://www.xquartz.org][XQuartz]] and =open -a XQuartz= In the XQuartz preferences go to the “Security”
tab and make sure youve got “Allow connections from network clients” ticked
#+BEGIN_SRC sh
ip=$(ifconfig en0 | grep inet | awk '$1=="inet" {print $2}')
xhost + $ip
docker run -ti --name spacemacs \
-e DISPLAY=$ip:0 \
-e TZ=<your_time_zone> \
-v <path_to_your_workspace>:/mnt/workspace \
spacemacs/emacs25:develop
#+END_SRC
[[https://fredrikaverpil.github.io/2016/07/31/docker-for-mac-and-gui-applications][source]],
[[https://github.com/chanezon/docker-tips/blob/master/x11/README.md][another method]]
** Windows
Get [[https://www.cygwin.com][Cygwin]] with =xinit=, =xorg-server= and optionaly [[https://github.com/rprichard/winpty][winpty]] (to run Emacs container with =-t=)
#+BEGIN_SRC sh
export DISPLAY=<your-machine-ip>:0.0
startxwin -- -listen tcp &
xhost + <your-machine-ip>
#+END_SRC
#+BEGIN_SRC sh
docker run --name spacemacs \
-e DISPLAY="$DISPLAY" \
-v <path_to_your_workspace>:/mnt/workspace \
spacemacs/emacs25:develop
#+END_SRC
Or with =-ti= via =winpty=
#+BEGIN_SRC sh
winpty docker run -ti --name spacemacs \
-e DISPLAY="$DISPLAY" \
-v <path_to_your_workspace>:/mnt/workspace \
spacemacs/emacs25:develop
#+END_SRC
[[http://manomarks.github.io/2015/12/03/docker-gui-windows.html][source]]
Also You can use [[https://www.reddit.com/r/emacs/comments/7a63r4/emacs_in_win10linuxdockerxserver_combo/][@ninrod s setup]]
** GNU/Linux
Make sure that =$DISPLAY= variable is set
#+BEGIN_SRC sh
docker run -ti --name spacemacs \
-e DISPLAY="unix$DISPLAY" \
-e UNAME="spacemacser" \
-e UID="1000" \
-e TZ=<your_time_zone> \
-v /tmp/.X11-unix:/tmp/.X11-unix:ro \
-v /etc/localtime:/etc/localtime:ro \
-v /etc/machine-id:/etc/machine-id:ro \
-v /var/run/dbus:/var/run/dbus \
-v <path_to_your_workspace>:/mnt/workspace \
spacemacs/emacs25:develop
#+END_SRC
=UID= and preferably =UNAME= should match the hosts user id. You can set them
in your Dockerfile with [[https://docs.docker.com/engine/reference/builder/#env][ENV statements]].
Thats it! Now you should see Emacs window.
But if it doesnt work You may need to allow local connection for the user
#+BEGIN_SRC sh
xhost +si:localuser:<UNAME>
#+END_SRC
Or allow local connection from the containers host-name
#+BEGIN_SRC sh
xhost +local:`docker inspect --format='{{ .Config.Hostname }}' spacemacs`
#+END_SRC
[[http://stackoverflow.com/questions/25281992/alternatives-to-ssh-x11-forwarding-for-docker-containers][source]]
** With Xpra on any of the OSes and via web-browser
*** Pros
- Xpra has a client for GNU/Linux, Windows and MacOS + can work via web browser
- Persistent server (you can connect and disconnect without disrupting Emacs)
- Interactive screen sharing [[https://imgur.com/ijdSuX6][demo]]
- Read/write rss/email with Emacs in web-browser (O_O) [[https://imgur.com/wDLDMZN][demo]]
*** Cons
- Lag spikes with some OSes
*** Instruction
Its a good idea to read [[https://github.com/JAremko/docker-x11-bridge][docker-x11-bridge]] and [[https://www.xpra.org/trac/][Xpra]] documentations, but
here is a short instruction:
**** With Xpra desktop client
Get [[https://xpra.org/][Xpra]] client for your OS. then
#+BEGIN_SRC sh
docker run -ti --rm --name x11-bridge \
-e MODE="ssh" \
--net=host \
-v ~/.ssh/pub_rsa:/etc/pub-keys/me.pub \
-e DISPLAY=:14 \
jare/x11-bridge
docker run -ti --rm --name spacemacs \
--volumes-from x11-bridge \
-e DISPLAY=:14 \
-e TZ=<your_time_zone> \
spacemacs/emacs25:develop
#+END_SRC
Now you can connect to it with Xpra desktop client
#+BEGIN_SRC sh
<XPRA EXECUTABLE> attach --encoding=rgb \
--ssh="ssh -o StrictHostKeyChecking=no -p 22" \
ssh:xpra@localhost:14
#+END_SRC
**** Via web-browser
#+BEGIN_SRC sh
docker run -ti --rm --name x11-bridge \
-e MODE="html" \
--net=host \
-e XPRA_PASSWORD=<PASSWORD> \
-e DISPLAY=:14 \
jare/x11-bridge
docker run -ti --rm --name spacemacs \
--volumes-from x11-bridge \
-e TZ=<your_time_zone> \
-e DISPLAY=:14 \
spacemacs/emacs25:develop
#+END_SRC
Now visit [[http://localhost:10000/index.html?encoding=png&password]] =<PASSWORD>
* Some basic docker commands to get you going
- =docker rm -f spacemacs= - remove =spacemacs= container
- =docker restart spacemacs= - restart =spacemacs= container
- =docker rmi -f spacemacs/emacs25:develop= - remove =spacemacs/emacs25:develop= image
- =docker pull spacemacs/emacs25:develop= - get newer =spacemacs/emacs25:develop= version
- =docker images -a= - list all images
- =docker ps -a= - list all containers
- =docker run ... spacemacs/emacs25:develop= - run the [[https://github.com/JAremko/docker-emacs/blob/master/Dockerfile.emacs25#L63][default command]]
- =docker run -ti ... spacemacs/emacs25:develop /bin/bash= - start bash
- =docker run --network=host ...= - less overhead and no need to map ports
- =docker exec spacemacs /usr/bin/emacs= - start =/usr/bin/emacs=
With the running =spacemacs= container
- =docker logs spacemacs= - print =spacemacs= containers logs
- =docker cp <from_local_path> spacemacs:/<to_my_spacemacs_container_path>=
- =docker cp spacemacs:/<from_my_spacemacs_container_path> <to_local_path>=
- Manage data in containers with [[https://docs.docker.com/engine/tutorials/dockervolumes/][Docker volumes]]. Example
- =docker volume create --name my-ws=
- =docker run ... -v my-ws:/mnt/workspace ... spacemacs/emacs25:develop=
- =docker run ... -v my-ws:/home/developer/workspace ... jare/vim-bundle=