Issues getting Ansible to work with Boot2Docker - docker

Question

I'm using an Ansible playbook to manage installation of Docker containers. I have the following playbook, which installs Cassandra:
I want to run this playbook locally, and have it install into Boot2Docker. I am able to SSH into Boot2Docker using the instructions from this answer:
$ ssh -i $HOME/.ssh/id_boot2docker -p 2022 docker#localhost
## .
## ## ## ==
## ## ## ## ===
/""""""""""""""""\___/ ===
~~~ {~~ ~~~~ ~~~ ~~~~ ~~ ~ / ===- ~~~
\______ o __/
\ \ __/
\____\______/
_ _ ____ _ _
| |__ ___ ___ | |_|___ \ __| | ___ ___| | _____ _ __
| '_ \ / _ \ / _ \| __| __) / _` |/ _ \ / __| |/ / _ \ '__|
| |_) | (_) | (_) | |_ / __/ (_| | (_) | (__| < __/ |
|_.__/ \___/ \___/ \__|_____\__,_|\___/ \___|_|\_\___|_|
Boot2Docker version 1.4.1, build master : 86f7ec8 - Tue Dec 16 23:11:29 UTC 2014
Docker version 1.4.1, build 5bc2ff8
docker#boot2docker:~$
I made an inventory file with the same SSH settings:
[local]
localhost ansible_ssh_port=2022 ansible_ssh_user=docker ansible_ssh_private_key_file=~/.ssh/id_boot2docker
But when I run the playbook, it fails with the error "/bin/sh: /usr/bin/python: not found":
$ ansible-playbook db-setup.yml -i hosts.local
PLAY [local] ******************************************************************
GATHERING FACTS ***************************************************************
failed: [localhost] => {"failed": true, "parsed": false}
/bin/sh: /usr/bin/python: not found
OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug1: /etc/ssh_config line 102: Applying options for *
debug1: auto-mux: Trying existing master
debug1: mux_client_request_session: master session id: 2
Shared connection to localhost closed.
TASK: [Database] **************************************************************
FATAL: no hosts matched or all hosts have already failed -- aborting
PLAY RECAP ********************************************************************
to retry, use: --limit #/Users/bryan/db-setup.retry
localhost : ok=0 changed=0 unreachable=0 failed=1
I still get the error even if "gather facts" is turned off. If I SSH into Boot2Docker, I can see that /usr/bin/python exists:
$ ssh -i $HOME/.ssh/id_boot2docker -p 2022 docker#localhost
...
docker#boot2docker:~$ which python

Answer 1

boot2docker ssh "tce-load -w -i python.tcz" does the trick as well (you need internet ;-)) for docker and ansible you will need "docker-py"
Setup pip, login to boot2docker
wget https://bootstrap.pypa.io/get-pip.py
python get-pip.py
pip install docker-py
also add to your inventory file:
dockerhost ansible_connection=ssh ansible_ssh_host=192.168.59.103 ansible_ssh_user=docker ansible_ssh_private_key_file=~/.ssh/id_boot2docker ansible_python_interpreter=/usr/local/bin/python

Answer 2

The solution was simple: Python isn't installed by default by Boot2Docker.
To install, run
$ boot2docker ssh "wget http://www.tinycorelinux.net/6.x/x86/tcz/python.tcz && tce-load -i python.tcz && rm -f python.tcz"
I created a script to do this automatically, see
https://gist.github.com/bcattle/90e64fbe808b3409ec2f