Centos7 docker-py doesn't seem to be installed
I found a couple problems with the docker-py module. After I worked through them I ended up with this:
- name: Docker-PY pip: name: "{{ item }}" with_items: - six==1.4 - docker-py==1.1.0
First, I ran into your problem. The solution is to explicitly set the most recent version of six as described here: https://github.com/docker/docker-py/issues/344.
After that, I ran into an issue (you might run into it too) with a bug in the docker-py 1.2.2 version. The workaround is to specify an older version as described here: https://github.com/ansible/ansible-modules-core/issues/1227. Do a pip uninstall docker-py to get rid of the newer version.
If you aren't using ansible to install these then do this:
[sudo] pip uninstall docker-py[sudo] pip install six==1.4[sudo] pip install docker-py==1.1.0
tl;dr;
check file permissions and make sure your user can read the python module in /usr/lib/python2.7/site-packages
Context
I recently went to this is issue but it was a permission problem.
Note that I used docker 1.9.1, ansible 2.0.1.0 and redhat 7.2.
I installed docker-py with ansible (this might not be your case).
I did it with this role:
- name: install docker-py with pip become: true pip: state=present name='{{ item }}' with_item: - docker-py==1.2.3 - six==1.10.0
Problem
When sudoing, ansible may install docker-py with default umask 0077. As a result, no user, except root, will be able to read docker-py module files.
Your playbook will result with the docker-py doesn't seem to be installed, but is required for the Ansible Docker module
error.
Notice the differences between:
sudo pip install docker-py
=>/usr/lib/python2.7/site-packages/docker
is in mode 0700sudo su
thenpip install docker-py
=>/usr/lib/python2.7/site-packages/docker
is in mode 0755
Fix
This will be fixable with ansible 2.1 by passing the umask=0022
parameter to the pip module (see https://github.com/ansible/ansible-modules-core/commit/4b46200477216dbcc54611d1c3e6f0cc83757aaf).
For now I fixed it by removing all packages installed in mode 0700:
pip uninstall -y six docker-py websocket_client
Then reinstalling them by hand:
sudo su# now umask is 0022pip install six==1.10.0 docker-py==1.2.3