lib/ansible/module_utils/known_hosts.py requires hashlib

Archives Ansible Project
1

Between Ansible 1.5.3 and 1.6.6, lib/ansible/module_utils/known_hosts.py added

  from hashlib import sha1

which doesn't work on target hosts who only have Python 2.4.

The 'git' module uses this, and produces this stacktrace on a target RHEL
5 system:

    Traceback (most recent call last):
      File "/home/ansible/.ansible/tmp/ansible-tmp-1406298245.3-265004186822038/git", line 1840, in ?
        from hashlib import sha1
    ImportError: No module named hashlib

If we modify known_hosts.py to just the import, like so:

  +$ git diff -U0
  diff --git a/lib/ansible/module_utils/known_hosts.py b/lib/ansible/module_utils/known_hosts.py
  index 62600d7..90620f7 100644
  --- a/lib/ansible/module_utils/known_hosts.py
  +++ b/lib/ansible/module_utils/known_hosts.py
  @@ -30 +30,5 @@ import hmac
  -from hashlib import sha1
  +try:
  + from hashlib import sha1
  +except ImportError:
  + pass

2

That’s fine, feel free to send a pull request.

We don’t have a workflow that involves patches to the mailing list, but pull requests do work great for this.

Thanks!

3

Heh, I didn't think to check this before I'd sent mail, but there's
actually already a fix for this in devel, in
https://github.com/ansible/ansible/commit/60451c20ab0cb8293a1ba51b48c600819a676626 --
it just hasn't made it into a release yet, I guess.

                                      -Josh (jbs@care.com)

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4

Yeah, it deserved to be but our last series of updates have been necessarily targeted.

We are possibly considering upping the 1.7 timetable and releasing in a couple of weeks (as mentioned, Windows will still be in beta, and hoping to extend module coverage more in 1.8 timeframe).