Merge branch 'mk/add-geo-ssf-troubleshooting-snippets' into 'master'

Geo: Add snippets for newly replicated data types

See merge request gitlab-org/gitlab!56062

doc/administration/troubleshooting/gitlab_rails_cheat_sheet.md

@@ -1045,6 +1045,67 @@ project = Project.find_by_full_path('<group/project>')
 Geo::RepositorySyncService.new(project).execute
 ```
 
+### Blob types newer than uploads/artifacts/LFS
+
+- `Packages::PackageFile`
+- `Terraform::StateVersion`
+- `MergeRequestDiff`
+
+`Packages::PackageFile` is used in the following examples, but things generally work the same for the other Blob types.
+
+#### The Replicator
+
+The main kinds of classes are Registry, Model, and Replicator. If you have an instance of one of these classes, you can get the others. The Registry and Model mostly manage PostgreSQL DB state. The Replicator knows how to replicate/verify (or it can call a service to do it):
+
+```ruby
+model_record = Packages::PackageFile.last
+model_record.replicator.registry.replicator.model_record # just showing that these methods exist
+```
+
+#### Replicate a package file, synchronously, given an ID
+
+```ruby
+model_record = Packages::PackageFile.find(id)
+model_record.replicator.send(:download)
+```
+
+#### Replicate a package file, synchronously, given a registry ID
+
+```ruby
+registry = Geo::PackageFileRegistry.find(registry_id)
+registry.replicator.send(:download)
+```
+
+### Repository types newer than project/wiki repositories
+
+- `SnippetRepository`
+- `GroupWikiRepository`
+
+`SnippetRepository` is used in the examples below, but things generally work the same for the other Repository types.
+
+#### The Replicator
+
+The main kinds of classes are Registry, Model, and Replicator. If you have an instance of one of these classes, you can get the others. The Registry and Model mostly manage PostgreSQL DB state. The Replicator knows how to replicate/verify (or it can call a service to do it).
+
+```ruby
+model_record = SnippetRepository.last
+model_record.replicator.registry.replicator.model_record # just showing that these methods exist
+```
+
+#### Replicate a snippet repository, synchronously, given an ID
+
+```ruby
+model_record = SnippetRepository.find(id)
+model_record.replicator.send(:sync_repository)
+```
+
+#### Replicate a snippet repository, synchronously, given a registry ID
+
+```ruby
+registry = Geo::SnippetRepositoryRegistry.find(registry_id)
+registry.replicator.send(:sync_repository)
+```
+
 ### Generate usage ping
 
 #### Generate or get the cached usage ping