-----Original message-----
From: Isaiah Frantz <isaiah.fra...@gmail.com>
Sent: Wednesday 21st September 2016 21:35
To: Puppet Users <puppet-users@googlegroups.com>
Subject: [Puppet Users] resource collector with multiple 'tag !=' test
Hello,
I am trying to realize users and am not getting what I expect with multiple !=
test.
Here is a simplified version that I have tested with puppet gem 4.2.2 and 4.6.2
(results were the same for all tests):
cat t.ppt.pp (common to all tests):
@notify {'This is a test 1':
tag => 'one'
}
@notify {'This is a test 2':
tag => 'two'
}
@notify {'This is a test 3':
tag => ['one', 'two']
}
@notify {'This is a test 4':
tag => 'three'
}
Notify <| test_goes_here |>
First 3 expected:
tail -1 t.pp
Notify <| tag == 'one' or tag == 'two' |>
puppet apply t.pp
Notice: Compiled catalog for defiant.cequintecid.com in environment production
in 0.70 seconds
Notice: This is a test 1
Notice: /Stage[main]/Main/Notify[This is a test 1]/message: defined 'message'
as 'This is a test 1'
Notice: This is a test 2
Notice: /Stage[main]/Main/Notify[This is a test 2]/message: defined 'message'
as 'This is a test 2'
Notice: This is a test 3
Notice: /Stage[main]/Main/Notify[This is a test 3]/message: defined 'message'
as 'This is a test 3'
Notice: Applied catalog in 0.02 seconds
Test 3 only, as expected:
tail -1 t.pp
Notify <| tag == 'one' and tag == 'two' |>
puppet apply t.pp
Notice: Compiled catalog for defiant.cequintecid.com in environment production
in 0.47 seconds
Notice: This is a test 3
Notice: /Stage[main]/Main/Notify[This is a test 3]/message: defined 'message'
as 'This is a test 3'
Notice: Applied catalog in 0.02 seconds
Now we get to the '!=' tests.
with a single tag it works as expected so I wont take space here to show that.
With multiple tags, it does not work as expected
Since tags is a hash that contains lots of things, including all explicit tag's
set on a resource. The == and != operators are supposed to act like contains
and !contains functions (or so I thought)
Here I expect to only get test 4. 1 and 2 are filtered because one of the
and'ed tests is false.
3 should fail too because both test are false: tags contains both 'one' and
'two'.
tail -1 t.pp
Notify <| tag != 'one' and tag != 'two' |>
puppet apply t.pp
Notice: Compiled catalog for defiant.cequintecid.com in environment production
in 0.48 seconds
Notice: This is a test 3
Notice: /Stage[main]/Main/Notify[This is a test 3]/message: defined 'message'
as 'This is a test 3'
Notice: This is a test 4
Notice: /Stage[main]/Main/Notify[This is a test 4]/message: defined 'message'
as 'This is a test 4'
Notice: Applied catalog in 0.01 seconds
Frankly, I also expect that 3 should be filtered from the or version too
because neither of the tests should be true if this is a contains function and
not one that tests against each hash value.
tail -1 t.pp
Notify <| tag != 'one' or tag != 'two' |>
puppet apply t.pp
Notice: Compiled catalog for defiant.cequintecid.com in environment production
in 0.58 seconds
Notice: This is a test 1
Notice: /Stage[main]/Main/Notify[This is a test 1]/message: defined 'message'
as 'This is a test 1'
Notice: This is a test 2
Notice: /Stage[main]/Main/Notify[This is a test 2]/message: defined 'message'
as 'This is a test 2'
Notice: This is a test 3
Notice: /Stage[main]/Main/Notify[This is a test 3]/message: defined 'message'
as 'This is a test 3'
Notice: This is a test 4
Notice: /Stage[main]/Main/Notify[This is a test 4]/message: defined 'message'
as 'This is a test 4'
Notice: Applied catalog in 0.02 seconds
Two boolean falses dont make a true do they?
Im confused :(
The query could be explained as follows :
If iether there is a tag that is not 'one', or there is a tag that is not two,
then it will be collected.
test1 : tag => one is != two, so that gives us true, and this collected
test2: tag => two is != one, so here also gives us true and thus collected
test3: tag => [ one , two]. as soon as there is one tag in the array that
return true, than the resource is collected. In your case one != two and aslo
two!=one, which makes the rersource collected.
test4: tag => three differs from both one and two
It is clear one needs to be carefull when defining the query in a collector.
Don't assume it works as we are used to work in conditionals as we are used in
normal programming.
I hope i didn't confuse too much.
Hth
johan
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