How to set config=value in php.ini with Puppet?

Question

I'm doing my first steps in Puppet and ran into a problem. I've installed PHP on a Linux server and I want to do some slightly changes to php.ini file. I don't want to overwrite the whole ini file with one from repository, just change/create one simple config value.

I want to ensure, that the property upload_max_filesize in php.ini has the value of 10M.

How can I achieve this?

Answer 1

There's basically 3 options:

1. Use augeas support in puppet (you'll need the ruby augeas libraries installed) like:

   augeas { "php.ini":
     notify  => Service[httpd],
     require => Package[php],
     context => "/files/etc/php.ini/PHP",
     changes => [
       "set post_max_size 10M",
       "set upload_max_filesize 10M",
     ];
   }
   

   You can use "augtool ls /files/etc/php.ini" to see the sections to understand how augeas is parsing the file and use that to work out the paths you need.

2. You can use an exec. Something like:

   define set_php_var($value) {
     exec { "sed -i 's/^;*[[:space:]]*$name[[:space:]]*=.*$/$name = $value/g' /etc/php.ini":
       unless  => "grep -xqe '$name[[:space:]]*=[[:space:]]*$value' -- /etc/php.ini",
       path    => "/bin:/usr/bin",
       require => Package[php],
       notify  => Service[httpd];
     }
   }
   set_php_var {
     "post_max_size":       value => '10M';
     "upload_max_filesize": value => '10M';
   }
   

   Unfortunately, this solution doesn't understand the sections in php.ini, so adding a variable that's not already there would require extra effort. This will do the wrong thing if a variable appears in more than one section (but examples I'm looking at appear to have all unique variable names). This should work for a variable that's present but commented-out with a semi-colon.

3. Copy the original php.ini file into your puppet repository and use file with source => 'puppet:///...' or content => template(...) to replace the file entirely, as you indicated you would prefer not to do.