ansible returns with "Failed to import the required Python library (Docker SDK for Python: docker (Python >= 2.7) or docker-py (Python 2.6))

Question

I am running myserver in ubuntu:

+ sudo cat /etc/os-release NAME="Ubuntu" VERSION="16.04.6 LTS (Xenial Xerus)" ID=ubuntu ID_LIKE=debian PRETTY_NAME="Ubuntu 16.04.6 LTS" VERSION_ID="16.04" HOME_URL="http://www.ubuntu.com/" SUPPORT_URL="http://help.ubuntu.com/" BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/" VERSION_CODENAME=xenial UBUNTU_CODENAME=xenial 

I use ansible and when I run it I get the following error:

fatal: [localhost]: FAILED! => {"changed": false, "msg": "Failed to import the required Python library (Docker SDK for Python: docker (Python >= 2.7) or docker-py (Python 2.6)) on dd63315fad06's Python /usr/bin/python. Please read module documentation and install in the appropriate location, for example via `pip install docker` or `pip install docker-py` (Python 2.6). The error was: No module named docker"} 

when I run

python -c "import sys; print(sys.path)" 

I see:

['', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/dist-packages', '/usr/local/lib/python2.7/dist-packages/pip-19.2.2-py2.7.egg', '/usr/local/lib/python2.7/dist-packages/fasteners-0.15-py2.7.egg', '/usr/local/lib/python2.7/dist-packages/monotonic-1.5-py2.7.egg', '/usr/lib/python2.7/dist-packages'] 

and python versions are as follows:

+ python --version Python 2.7.12 + python3 --version Python 3.5.2 

Then as I see everything is fine and I am not sure why I get

"Failed to import the required Python library (Docker SDK for Python: docker (Python >= 2.7) or docker-py (Python 2.6)) on dd63315fad06's Python /usr/bin/python. Please read module documentation and install in the appropriate location, for example via `pip install docker` or `pip install docker-py` (Python 2.6). The error was: No module named docker" 

in ansible?

Answer 1

It appears that you don't have the docker module installed.

You will need to install it via your system package manager (apt install python-docker, for example), or using pip (pip install docker).

If you have multiple Python versions, make sure that you've installed the docker module into the version that Ansible is using.

Answer 2

I have faced the same issue for the Ansible docker-compose module. I was able to fix it by selecting python3 for those tasks.

Before (Not working)

- name: Create docker service services   docker_compose:     project_src: /root/   become: true 

After (Working)

We can get the python location by $which python3

- name: Create fleuntd services   docker_compose:     project_src: /root/   become: true   vars:     ansible_python_interpreter: /bin/python3