Devstack installation failing at python update.py /opt/stack/keystone

Question

i am new learner of openstack, i am trying to install devstack on virtual box using ubunbu. while installing i am getting the following error. any one can help me. the error prompt is as follow

setup_develop /opt/stack/keystone

• local project_dir=/opt/stack/keystone
• setup_package_with_req_sync /opt/stack/keystone -e
• local project_dir=/opt/stack/keystone
• local flags=-e ++ cd /opt/stack/keystone ++ git diff --exit-code
• local update_requirements=
• [[ '' != \c\h\a\n\g\e\d ]]
• [[ strict == \s\o\f\t ]]
• cd /opt/stack/requirements
• python update.py /opt/stack/keystone Traceback (most recent call last): File "update.py", line 38, in from parsley import makeGrammar ImportError: No module named parsley
• exit_trap

Answer 1

This issue has been fixed by devstack. Try to update the commit and re-install, it should work. It was simply a missing library issue. You can use sudo apt-get install python-parsley if on Ubuntu or any Linux machine.

Another temporary workaround:

sudo -E pip install -U parsley