Merge branch 'mrchrisw/support-reg-debug' into 'master'

Add support for registry debug

Add support for the debug configuration value to troubleshoot registry issues

```
http:
  debug:
    addr: localhost:5001
``` 

https://docs.docker.com/registry/configuration/#/debug

See merge request !1002

CHANGELOG.md

@@ -3,6 +3,10 @@
 The latest version of this file can be found at the master branch of the
 omnibus-gitlab repository.
 
+8.13.0
+
+- Add support for registry debug addr configuration
+
 8.12.0
 
 - Add support for using NFS root_squash for storage directories d5cf0d1d

files/gitlab-config-template/gitlab.rb.template

@@ -369,6 +369,7 @@ external_url 'GENERATED_EXTERNAL_URL'
 # registry['log_directory'] = "/var/log/gitlab/registry"
 # registry['log_level'] = "info"
 # registry['rootcertbundle'] = "/var/opt/gitlab/registry/certificate.crt"
+# registry['debug_addr'] = "localhost:5001"
 # registry['storage_delete_enabled'] = true
 # # Registry backend storage, see http://docs.gitlab.com/ce/administration/container_registry.html#container-registry-storage-driver
 # registry['storage'] = {

files/gitlab-cookbooks/gitlab/attributes/default.rb

@@ -499,6 +499,7 @@ default['gitlab']['registry']['log_level'] = "info"
 default['gitlab']['registry']['rootcertbundle'] = nil
 default['gitlab']['registry']['storage_delete_enabled'] = true
 default['gitlab']['registry']['storage'] = nil
+default['gitlab']['registry']['debug_addr'] = nil
 
 ####
 # Nginx

files/gitlab-cookbooks/gitlab/templates/default/registry-config.yml.erb

@@ -10,6 +10,10 @@ http:
   secret: "<%= @http_secret %>"
   headers:
     X-Content-Type-Options: [nosniff]
+  <% if @debug_addr %>
+  debug:
+    addr: <%= @debug_addr %>
+  <% end %>
 health:
   storagedriver:
     enabled: true