Puppet 4 introduces strong type checking so after this change it should work on puppet 4 and puppet 3

devcfgc · devcfgc · commit 9580f0f4f721 · 2017-06-15T12:31:13.000+02:00
diff --git a/manifests/params.pp b/manifests/params.pp
@@ -385,7 +385,7 @@
 
   case $::operatingsystem {
     'Ubuntu': {
-      if versioncmp($::operatingsystemmajrelease, '14.10') > 0 {
+      if versioncmp("${::operatingsystemmajrelease}", '14.10') > 0 {
         $server_service_provider = 'systemd'
       } else {
         $server_service_provider = 'upstart'
