Saltstack master can't find execution module, says not available

Question

I have written a simple module and have put the file under <salt_file_roots>/_modules, the content is more or less:

# foomod.py
def foo(*args):
    return {'name': 'foo', 'result': True}

I've run salt minion saltutil.sync_all, have seen the output with the module I added. I can see that it was synced in minion log as well.

minion:
    - modules.foomod

1. I can use it from the minion:

$ salt-call foomod.foo
local:
    ----------
    name:
        foo
    result:
        True

2. I can include it in a state using module.run and run the state, and it also works.

3. But when I call it from master, this happens:

$ salt minion foomod.foo
minion:
    - 'foomod.foo' is not available.

I see the call on minion log as well when I call from master

2014-07-29 15:30:44,290 [salt.minion      ][INFO    ] User root Executing command foomod.foo with jid 20140729153044256654
2014-07-29 15:30:44,291 [salt.minion      ][DEBUG   ] Command details {'tgt_type': 'glob', 'jid': '20140729153044256654', 'tgt': 'minion', 'ret': '', 'user': 'root', 'arg': [], 'fun': 'foomod.foo'}
2014-07-29 15:30:44,308 [salt.minion      ][INFO    ] Returning information for job: 20140729153044256654

So either I skipped the part where I enable this to be run from master directly or I imagined a feature that doesn't exists.

Any help is appreciated.

Answer 1

Answering own question. Salt master had pycrypto==2.6.1 and minion had pycrypto==2.4.1. Updating it on minion solved it.