Hi David:
On Thu, May 19, 2016 at 1:57 PM, David Karr <[email protected]>
wrote:
> I'm stepping through "Learning Puppet 4", and I ran into an error
> following steps in the book, and I want to understand what went wrong
> before I report it.
>
> The section in question is "Using Puppet EPP Templates" in chapter 13.
>
> I'll work backwards from the error I'm getting, showing the relevant files
> afterwards. Here is what I see when I apply the manifest:
> [vagrant@client puppet]$ sudo puppet apply --environment test manifests/
> Warning: Unknown variable: '::puppet::common_loglevel'. at /etc/puppetlabs
> /code/environments/test/modules/puppet/templates/puppet.conf.epp:3:21
> Warning: Unknown variable: 'puppet::agent_loglevel'. at /etc/puppetlabs/
> code/environments/test/modules/puppet/templates/puppet.conf.epp:7:7
> Warning: Unknown variable: '::puppet::server'. at /etc/puppetlabs/code/
> environments/test/modules/puppet/templates/puppet.conf.epp:10:18
> Warning: Unknown variable: 'puppet::apply_loglevel'. at /etc/puppetlabs/
> code/environments/test/modules/puppet/templates/puppet.conf.epp:14:7
> Notice: Compiled catalog for client.example.com in environment test in
> 0.04 seconds
> Notice: /Stage[main]/Main/File[/etc/puppetlabs/puppet/puppet.conf]/content
> : content changed '{md5}a72aadac19feefd06f10fb6b8f90c5f4' to
> '{md5}0f89a3d91b54aec8463b4a250a493f36'
> Notice: /Stage[main]/Main/File[/etc/puppetlabs/puppet/puppet.conf]/owner:
> owner changed 'vagrant' to 'root'
> Notice: /Stage[main]/Main/File[/etc/puppetlabs/puppet/puppet.conf]/group:
> group changed 'vagrant' to 'wheel'
> Notice: /Stage[main]/Main/File[/etc/puppetlabs/puppet/puppet.conf]/mode:
> mode changed '0664' to '0644'
> Notice: Applied catalog in 0.06 seconds
> [vagrant@client puppet]$
>
>
Based on the warnings, it looks like the "puppet" class hasn't been
declared. Did you `include puppet` somewhere or otherwise classify the
node to include the "puppet" class?
> The template in question, right from the book, is this:
>
> # Generated by Puppet EPP template processor
> [master]
> log_level = <%= $::puppet::common_loglevel %>
>
> # This is used by "puppet agent"
> [agent]
> <% if $puppet::agent_loglevel != undef { -%>
> log_level = <%= $::puppet::agent_loglevel %>
> <% } -%>
> server = <%= $::puppet::server %>
>
> # This is used for "puppet apply"
> [user]
> <% if $puppet::apply_loglevel != undef { -%>
> log_level = <%= $::puppet::apply_loglevel %>
> <% } -%>
>
>
> Likely the most important piece to see now is the part of the "init.pp"
> manifest that declares the parameters being referenced here:
>
> class puppet(
> $version = 'latest',
> $status = 'running',
> $enabled = true,
>
>
>
> *$server = 'puppet.example.com <http://puppet.example.com>',
> $common_loglevel = 'warning', $agent_loglevel = undef, $apply_loglevel =
> undef,*
> ) {
>
>
> I imagine the syntax of the variable references in the EPP file have to be
> slightly different, but I have no idea what it should be.
>
The EPP is fine; the code inside an EPP <% %> is expected to be valid
Puppet code.
>
> I also find it curious that the error messages print the name of the
> variable differently for different messages, sometimes prefixed with "::"
> and sometimes not. Any background that would explain that?
>
When a variable name has a leading "::" it forces a lookup in the
top-scope. An example where it would be needed is when you have a
top-scoped variable and a local variable of the same name; a leading "::"
would ensure that the top-scope variable is used and not the local variable.
For what it's worth, here's what a warning from a prototype Puppet compiler
I'm working on looks like when evaluating your example (hopefully it's a
bit more clear):
Warning: <epp>:3:21: could not look up variable $::puppet::common_loglevel
because class 'puppet' has not been declared.
log_level = <%= $::puppet::common_loglevel %>
^~~~~~~~~~~~~~~~~~~~~~~~~~
...
Note: the filename is "<epp>" because I stuck your EPP source in an
"inline_epp" call rather than a file.
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