Logging configuration

README.md

@@ -187,3 +187,10 @@ that uses it, and uses bundler to execute Vagrant:
 ```
 $ bundle exec vagrant up --provider=openstack
 ```
+
+## Logging
+
+To enable all Vagrant logs set environment variable `VAGRANT_LOG` to the desire
+log level (for instance `VAGRANT_LOG=debug`). If you want only Openstack provider
+logs use the variable `VAGRANT_OPENSTACK_LOG`. if both variables are set, `VAGRANT_LOG`
+takes precedence.

source/lib/vagrant-openstack-provider.rb

@@ -25,19 +25,25 @@ def self.init_logging
         # This means that the logging constant wasn't found,
         # which is fine. We just keep `level` as `nil`. But
         # we tell the user.
-        level = nil
+        begin
+          level = Log4r.const_get(ENV['VAGRANT_OPENSTACK_LOG'].upcase)
+        rescue NameError
+          level = nil
+        end
       end
 
       # Some constants, such as "true" resolve to booleans, so the
       # above error checking doesn't catch it. This will check to make
       # sure that the log level is an integer, as Log4r requires.
       level = nil unless level.is_a?(Integer)
 
-      # Set the logging level on all "vagrant" namespaced
+      # Set the logging level
       # logs as long as we have a valid level.
       if level
         logger = Log4r::Logger.new('vagrant_openstack')
-        logger.outputters = Log4r::Outputter.stderr
+        out = Log4r::Outputter.stdout
+        out.formatter = Log4r::PatternFormatter.new(pattern: '%d | %5l | %m', date_pattern: '%Y-%m-%d %H:%M')
+        logger.outputters = out
         logger.level = level
       end
     end