ssh2docker

ssh2docker

🔧 SSH server that creates a Docker container per connection (chroot++)

                                               +----------------+
                                               |  mycorp.biz    |
                                               |                |
+--------------+                               | +------------+ |
|              |     ssh container1@mycorp.biz | |            | |
| bobby@laptop +---------------------------------> ssh2docker | |
|              |                               | |            | |
+--------------+                               | +------+-----+ |
                  +----------------------------+        |       |
                  |                                     |       |
                  | docker exec -it container1 /bin/bash|       |
                  |                                     |       |
                  |              +----------------------v-----+ |
                  |              |    Docker                  | |
                  |              |                            | |
                  |              | +----------+ +----------+  | |
                  |              | |          | |          |  | |
                  |              | |Container1| |Container2|  | |
                  |              | |          | |          |  | |
                  |              | +----------+ +----------+  | |
                  |              +----------------------------+ |
                  +---------------------------------------------+

Usage

NAME:
   ssh2docker - SSH portal to Docker containers

USAGE:
   ssh2docker [global options] command [command options] [arguments...]

AUTHOR(S):
   Manfred Touron <https://github.com/moul/ssh2docker>

COMMANDS:
   help, h	Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --verbose, -V                Enable verbose mode
   --bind, -b ":2222"           Listen to address
   --host-key, -k "built-in"    Path or complete SSH host key to use, use 'system' for keys in /etc/ssh
   --allowed-images             List of allowed images, i.e: alpine,ubuntu:trusty,1cf3e6c
   --shell "/bin/sh"            Default shell
   --docker-run-args "-it --rm" 'docker run' arguments
   --no-join                    Do not join existing containers, always create new ones
   --clean-on-startup           Cleanup Docker containers created by ssh2docker on start
   --password-auth-script       Password auth hook file
   --publickey-auth-script    	Public-key auth hook file
   --local-user                 If setted, you can spawn a local shell (not withing docker) by SSHing to this user
   --banner                     Display a banner on connection
   --help, -h                   show help
   --version, -v                print the version

Example

Server

$ ssh2docker
INFO[0000] Listening on port 2222
INFO[0001] NewClient (0): User="alpine", ClientVersion="5353482d322e302d4f70656e5353485f362e362e317031205562756e74752d327562756e747532"
INFO[0748] NewClient (1): User="ubuntu", ClientVersion="5353482d322e302d4f70656e5353485f362e362e317031205562756e74752d327562756e747532"

Client

$ ssh localhost -p 2222 -l alpine
Host key fingerprint is 59:46:d7:cf:ca:33:be:1f:58:fd:46:c8:ca:5d:56:03
+--[ RSA 2048]----+
|          . .E   |
|         . .  o  |
|          o    +.|
|         +   . .*|
|        S    .oo=|
|           . oB+.|
|            oo.+o|
|              ...|
|              .o.|
+-----------------+

alpine@localhost's password:
/ # cat /etc/alpine-release
3.2.0
/ # ^D

$ ssh localhost -p 2222 -l ubuntu
Host key fingerprint is 59:46:d7:cf:ca:33:be:1f:58:fd:46:c8:ca:5d:56:03
+--[ RSA 2048]----+
|          . .E   |
|         . .  o  |
|          o    +.|
|         +   . .*|
|        S    .oo=|
|           . oB+.|
|            oo.+o|
|              ...|
|              .o.|
+-----------------+

ubuntu@localhost's password:
# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 14.04.3 LTS
Release:	14.04
Codename:	trusty
# ^D

Install

Install latest version using Golang (recommended)

$ go get github.com/moul/ssh2docker/cmd/ssh2docker

Install latest version using Homebrew (Mac OS X)

$ brew install https://raw.githubusercontent.com/moul/ssh2docker/master/contrib/homebrew/assh.rb --HEAD

or the latest released version

$ brew install https://raw.githubusercontent.com/moul/ssh2docker/master/contrib/homebrew/assh.rb

Test with Docker

You can test ssh2docker within Docker, but you will have some limitations, i.e: cannot run with boot2docker.

Here is an example about how to use ssh2docker inside Docker

$ docker run --privileged -v /var/lib/docker:/var/lib/docker -it --rm -p 2222:2222 moul/ssh2docker

Changelog

v1.2.0 (2015-11-22)

• Support of --host-key=system to use OpenSSH keys (#45)
• Support of custom entrypoint (#63)
• Support of public-key authentication (#2)
• Handling custom environment variables, user and command in password script (#57)
• Replacing "_" by "/" on default image name to handle ControlMaster on clients
• Support of --banner option (#26)
• Add a not-yet-implemented warning for exec (#51)
• Support of --local-user option, to allow a specific user to be a local shell (#44)
• Kill connection when exiting shell (ctrl+D) (#43)

full commits list

v1.1.0 (2015-10-07)

• Fix runtime error on Linux (#38)
• Initial version of the native Scaleway support (#36)
• Support of 'ssh2docker --password-auth-script' options (#28)
• Add docker support (#17)
• Add GOXC support to build binaries for multiple architectures (#18)
• Support of 'ssh2docker --clean-on-startup' (#23)
• Add homebrew support (#16)
• Add Changelog (#19)

full commits list

v1.0.1 (2015-09-27)

• Using party to manage dependencies

full commits list

v1.0.0 (2015-09-27)

Initial release

Features

• Basic logging
• Handling environment-variable requests
• Support of --allowed-images option (#4)
• Ability to configure docker run arguments (#13)
• Reconnecting to existing containers (#14)
• Support of --no-join option (#6)

full commits list

License

MIT