Issue #6539 has been updated by Trevor Vaughan.
I recently found myself looking at this exact same scenario.
The behaviour that I expect is:
* Parent classes can be inherited (works)
* Subclasses can add variables
* Subclasses, when not defining a variable, will pick up the default variable
from the parent
* Variables must be referred to at the defined scope
* $a::foo -> foo in the $a scope
* $b::foo -> foo in the $b scope
* It is an error to include both a class and a subclass of itself in the same
scope
* Not sure if this should be true, but it's what I expect
* Defines still cannot be inherited
----------------------------------------
Bug #6539: Inheritance of a parametrized class does not work
https://projects.puppetlabs.com/issues/6539#change-55049
Author: Peter Meier
Status: Accepted
Priority: High
Assignee: Nick Lewis
Category: parameterized classes
Target version:
Affected Puppet version: 2.6.5
Keywords:
Branch: https://github.com/nicklewis/puppet/tree/ticket/master/6539
Given the following manifest:
<pre>
# cat foo.pp
class a($m){
include c
}
class b inherits a {
include d
notice $m
}
class c {
file{'/tmp/a': content => $a::m }
}
class d inherits c {
File['/tmp/a']{ mode => 0600 }
}
class{'b': m => 'foo' }
</pre>
produces the following error:
<pre>
# puppet --trace foo.pp
/usr/lib/ruby/site_ruby/1.8/puppet/util/errors.rb:60:in `fail'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/resource.rb:313:in `validate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/resource.rb:98:in `finish'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/resource.rb:70:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:151:in `evaluate_classes'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:142:in `each'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:142:in `evaluate_classes'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/resource.rb:56:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/util/errors.rb:35:in `exceptwrap'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/resource.rb:39:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/resource.rb:38:in `collect'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/resource.rb:38:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast.rb:72:in `safeevaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/astarray.rb:35:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/astarray.rb:34:in `collect'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/astarray.rb:34:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast.rb:72:in `safeevaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/resource/type.rb:76:in `evaluate_code'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/resource.rb:71:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:290:in `evaluate_main'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:101:in `compile'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:18:in `compile'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:77:in
`compile'
/usr/lib/ruby/site_ruby/1.8/puppet/util.rb:197:in `benchmark'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:75:in
`compile'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:34:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/indirection.rb:193:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector.rb:50:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/application/apply.rb:115:in `main'
/usr/lib/ruby/site_ruby/1.8/puppet/application/apply.rb:35:in `run_command'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:287:in `run'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:393:in `exit_on_fail'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:287:in `run'
/usr/lib/ruby/site_ruby/1.8/puppet/util/command_line.rb:55:in `execute'
/usr/bin/puppet:4
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:21:in `compile'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:77:in
`compile'
/usr/lib/ruby/site_ruby/1.8/puppet/util.rb:197:in `benchmark'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:75:in
`compile'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:34:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/indirection.rb:193:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector.rb:50:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/application/apply.rb:115:in `main'
/usr/lib/ruby/site_ruby/1.8/puppet/application/apply.rb:35:in `run_command'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:287:in `run'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:393:in `exit_on_fail'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:287:in `run'
/usr/lib/ruby/site_ruby/1.8/puppet/util/command_line.rb:55:in `execute'
/usr/bin/puppet:4
Invalid parameter m at /tmp/foo.pp:18 on node foo
</pre>
Changing the manifest to:
<pre>
# cat foo.pp
class a($m){
include c
}
class b($m) inherits a {
include d
notice $m
}
class c {
file{'/tmp/a': content => $a::m }
}
class d inherits c {
File['/tmp/a']{ mode => 0600 }
}
class{'b': m => 'foo' }
</pre>
Produces the following error.
<pre>
# puppet --trace foo.pp
/usr/lib/ruby/site_ruby/1.8/puppet/util/errors.rb:60:in `fail'
/usr/lib/ruby/site_ruby/1.8/puppet/resource/type.rb:232:in
`set_resource_parameters'
/usr/lib/ruby/site_ruby/1.8/puppet/resource/type.rb:227:in `each'
/usr/lib/ruby/site_ruby/1.8/puppet/resource/type.rb:227:in
`set_resource_parameters'
/usr/lib/ruby/site_ruby/1.8/puppet/resource/type.rb:74:in `evaluate_code'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/resource.rb:71:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/resource/type.rb:295:in
`evaluate_parent_type'
/usr/lib/ruby/site_ruby/1.8/puppet/resource/type.rb:67:in `evaluate_code'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/resource.rb:71:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:151:in `evaluate_classes'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:142:in `each'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:142:in `evaluate_classes'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/resource.rb:56:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/util/errors.rb:35:in `exceptwrap'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/resource.rb:39:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/resource.rb:38:in `collect'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/resource.rb:38:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast.rb:72:in `safeevaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/astarray.rb:35:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/astarray.rb:34:in `collect'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast/astarray.rb:34:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/ast.rb:72:in `safeevaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/resource/type.rb:76:in `evaluate_code'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/resource.rb:71:in `evaluate'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:290:in `evaluate_main'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:101:in `compile'
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:18:in `compile'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:77:in
`compile'
/usr/lib/ruby/site_ruby/1.8/puppet/util.rb:197:in `benchmark'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:75:in
`compile'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:34:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/indirection.rb:193:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector.rb:50:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/application/apply.rb:115:in `main'
/usr/lib/ruby/site_ruby/1.8/puppet/application/apply.rb:35:in `run_command'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:287:in `run'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:393:in `exit_on_fail'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:287:in `run'
/usr/lib/ruby/site_ruby/1.8/puppet/util/command_line.rb:55:in `execute'
/usr/bin/puppet:4
/usr/lib/ruby/site_ruby/1.8/puppet/parser/compiler.rb:21:in `compile'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:77:in
`compile'
/usr/lib/ruby/site_ruby/1.8/puppet/util.rb:197:in `benchmark'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:75:in
`compile'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/catalog/compiler.rb:34:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector/indirection.rb:193:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/indirector.rb:50:in `find'
/usr/lib/ruby/site_ruby/1.8/puppet/application/apply.rb:115:in `main'
/usr/lib/ruby/site_ruby/1.8/puppet/application/apply.rb:35:in `run_command'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:287:in `run'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:393:in `exit_on_fail'
/usr/lib/ruby/site_ruby/1.8/puppet/application.rb:287:in `run'
/usr/lib/ruby/site_ruby/1.8/puppet/util/command_line.rb:55:in `execute'
/usr/bin/puppet:4
Must pass m to Class[A] at /tmp/foo.pp:1 on node foo
</pre>
It seems like there is currently no way to inherit from a parametrized class.
Probably related to #4534
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