Adams

Adams is our new cybernetic DevOps. Please welcome him and make him feel at home, I hope he will find a nice place to work amongst us. So far he’s been a brilliant student though a bit dumb and formal, I hope he will find a warm and welcoming place in our hearts. For the next months he will remain in formation so if you would please consider handing him any rookie task you might have he shall gladly take them upon him and will probably crash the system and need your help to fix it but, hey, that’s what unpaid interns are for, right ?

Current status

Adams is currently able to use a local shell or connect to remote hosts via ssh. He is quite the hardcore hacker wannabe using only /bin/sh though ksh and bash suit him fine too. He’s still green but he can already gather basic information about users, groups and files.

We are currently teaching him about new kinds of resources and how to read resource specification manifests.

Security design

You should only allow Adams what you would allow your system operators :

• a shell accessible through SSH using a public key
• apropriate sudo permissions

All commands issued to the remote hosts can be logged.

Adams does not grant the hosts access to its workstation while it works. Adams does not grant access to data belonging to any host. Adams does not send any data that is not of direct concern to the host. In short, all UNIX permissions are respected, Adams is a regular UNIX user.

Usage

1. Install repo.

2. Fetch adams sources.

  $ sbcl --eval '(repo:install :adams)'

3. Build and install the adams binary

  $ cd ~/common-lisp/cl-adams/adams
  $ make
  $ sudo cp build/adams /usr/local/bin/adams

4. Configure emacs (optional)

In your ~/.emacs file :

  ;;  Adams
  (add-to-list 'auto-mode-alist '("\\.adams\\'" . lisp-mode))

5. Write some resources in a .adams script

In the tutorial.adams file :

  #!/usr/local/bin/adams --script

  (resource 'host "adams.kmx.io"
            :user "adams"
            (resource 'user "adams"
                      :shell "/bin/sh"
                      :ensure :present))

  (with-host "adams.kmx.io"
    (sync *host*))

6. Profit.

  $ chmod 755 tutorial.adams
  $ ./tutorial.adams

The tutorial.adams script will synchronize the host “adams.kmx.io” according to the resource specifications given in the file.

7. DRY up your scripts using #.(include "file")

In the user/dx.adams file :

  ;; Thomas de Grivel (kmx.io)
  (resource 'group "dx"
            :gid 19256
            :ensure :present)
  (resource 'user "dx"
            :uid 19256
            :gid 19256
            :home "/home/dx"
            :ensure :present)

In your main script :

  #!/usr/local/bin/adams --script

  (resource 'host "adams.kmx.io"
            :user "adams"
            (resource 'user "adams"
                      :shell "/bin/sh"
                      :ensure :present)
            #.(include "user/dx"))

  (with-host "adams.kmx.io"
    (sync *host*))

License

Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

Contribute

To contribute, fork this repository and send us a pull request. Your code must be published under the above license terms.

Authors

Thomas de Grivel thoxdg@gmail.com