install ansible error because of stale pyyaml

[supernan1994]

Bug Report

What I have done:

$ tar -xzvf dm-ansible-latest.tar.gz
$ mv dm-ansible-latest dm-ansible
$ cd /home/tidb/dm-ansible
$ sudo pip install -r ./requirements.txt
$ ansible --version

What I expect to see:

ansible 2.5.0

What I actually see:

Traceback (most recent call last):
  File "/bin/ansible", line 67, in <module>
    import ansible.constants as C
  File "/usr/lib/python2.7/site-packages/ansible/constants.py", line 17, in <module>
    from ansible.config.manager import ConfigManager, ensure_type, get_ini_config_value
  File "/usr/lib/python2.7/site-packages/ansible/config/manager.py", line 16, in <module>
    from yaml import load as yaml_load
ImportError: No module named yaml

Fixed by:

$ sudo pip install pyyaml --ignore-installed
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
Looking in indexes: http://mirrors.aliyun.com/pypi/simple/
Collecting pyyaml
  Downloading http://mirrors.aliyun.com/pypi/packages/9e/a3/1d13970c3f36777c583f136c136f804d70f500168edc1edea6daa7200769/PyYAML-3.13.tar.gz (270kB)
    100% |████████████████████████████████| 276kB 3.4MB/s
Installing collected packages: pyyaml
  Running setup.py install for pyyaml ... done
Successfully installed pyyaml-3.13

Maybe we should make sure pyyaml is up to date.

[amyangfei]

This is a little strange, as PyYAML is in ansible install dependencies.
We can find Collecting PyYAML (from ansible<2.7.0,>=2.5.0->-r requirements.txt (line 1)) when installing ansible via pip.
Did you install ansible from a clean python env, or whether there are some errors when you run sudo pip install -r ./requirements.txt?

[csuzhangxc]

@supernan1994

Did you install ansible from a clean python env, or whether there are some errors when you run sudo pip install -r ./requirements.txt?

any feedback?

[csuzhangxc]

@supernan1994 I'll close it now and if you have any problem you can re-open it.