• cyber-dojo is where programmers meet to practice programming!
• cyber-dojo is not an IDE, an Individual Development Environment
• cyber-dojo is an IDE, an Interactive Dojo Environment!
• cyber-dojo is about shared learning
• in a cyber-dojo you practice by going slower and focusing on improving rather than finishing
• cyber-dojo foundation is a registered Scottish Charitable Incorporated Organisation
• How can I contribute to developing cyber-dojo?

• Running a server
  • on docker
  • on docker swarm
• Versioning
  • listing the current version
  • listing installed versions
  • updating the server to the latest version
  • setting the server to a specific version
• Overriding the default...
  • port
  • start-point images
  • nginx image
  • rails web image
  • dot env files

Follow these instructions to install the cyber-dojo bash script and to prepare your server.

$ cyber-dojo up
...
$ cyber-dojo version
Version: 0.1.19
   Type: public
...

This is currently in beta! Follow these instructions to install the cyber-dojo bash script and to prepare your server.

$ export CYBER_DOJO_SWARM=true
$ cyber-dojo up

$ cyber-dojo version
Version: 0.1.23
   Type: public

From 0.1.50 onwards:

$ cyber-dojo version ls
0.1.49              2019-11-21 21:31:09 +0000 UTC
0.1.48              2019-11-20 12:52:04 +0000 UTC
...
0.1.21              2019-08-07 11:51:48 +0000 UTC
...

$ cyber-dojo update latest
$ cyber-dojo version
Version: 0.1.49
   Type: public
...
# Now make it live...
$ cyber-dojo up
Using version=0.1.49 (public)
...

$ cyber-dojo update 0.1.21
$ cyber-dojo version
Version: 0.1.21
   Type: public
...
# Now make it live...
$ cyber-dojo up
Using version=0.1.21 (public)
...

By default your cyber-dojo server will be on port 80.

• Override this port using the command-line argument --port. Eg

  $ cyber-dojo up --port=8000
  ...
  Using port=8000
  ...

• The cyber-dojo up command uses three default start-point images (tagged appropriately)
  • --custom=cyberdojo/custom-start-points
  • --exercises=cyberdojo/exercises-start-points
  • --languages=cyberdojo/languages-start-points-common
• You can create and use your own alternative start-point images in place of these defaults if you wish.
  • Read how to create them by running:

    cyber-dojo start-point create --help
    

  • Read how to use them by running:

    cyber-dojo up --help
    

• By default your cyber-dojo server will use cyberdojo/nginx as its nginx service image (tagged appropriately).
• From 0.1.47 onwards you can override this by exporting two environment variables. Eg

  $ export CYBER_DOJO_NGINX_IMAGE=cucumber/nginx
  $ export CYBER_DOJO_NGINX_TAG=efd7e37
  $ cyber-dojo up ...
  ...
  Using nginx=cucumber/nginx:efd7e37
  ...

• By default your cyber-dojo server will use cyberdojo/web as its web service image (tagged appropriately).
• From 0.1.28 onwards you can override this by exporting two environment variables. Eg

  $ export CYBER_DOJO_WEB_IMAGE=turtlesec/web
  $ export CYBER_DOJO_WEB_TAG=84d6d0e
  $ cyber-dojo up ...
  ...
  Using web=turtlesec/web:84d6d0e
  ...

• There are default .env files for the web and nginx services.
• You can override these by exporting two environment variables set to the absolute path of your own .env file. Eg

  $ export CYBER_DOJO_NGINX_ENV=/home/fred/my_nginx.env
  $ export CYBER_DOJO_WEB_ENV=/home/fred/my_web.env
  $ cyber-dojo up
  ...
  Using nginx.env=/home/fred/my_nginx.env (custom)
  Using web.env=/home/fred/my_web.env (custom)
  ...

From 0.1.131 onwards, when an exercise starts a welcome dialog displays traffic-light information. You can turn off this dialog with the following web.env entry:

STARTING_INFO_DIALOG=off

From 0.1.137 onwards, there is an experimental REPL service for Python. You can turn this on with the following web.env entry:

REPL=on

Each repo in the github cyber-dojo organization builds a single docker image. The main kubernetes backed https://cyber-dojo.org uses:

• custom-start-points - serves the custom start-points.
• exercises-start-points - serves the exercises start-points.
• languages-start-points - serves the languages start-points.
• avatars - serves the avatar names and images.
• creator - creates exercises (group and individual) with unique ids.
• differ - diffs two sets of files.
• nginx - web-proxy, security, images (jpg) cache, and service routing.
• runner - runs the tests and returns a [stdout,stderr,status,timed_out,colour] tuple.
• puller - pulls start-point images onto nodes..
• saver - persists group/individual exercises + code/test files (in a host dir volume-mounted to /cyber-dojo).
• web - rails web-server (a monolith slowly being Strangler Figged).

Locally running servers also use:

• commander - receives commands from the cyber-dojo shell script
• versioner - holds consistent sets of image tags for all cyber-dojo services