139 lines
7.7 KiB
Markdown
139 lines
7.7 KiB
Markdown
# File Storage in GitLab
|
|
|
|
We use the [CarrierWave] gem to handle file upload, store and retrieval.
|
|
|
|
There are many places where file uploading is used, according to contexts:
|
|
|
|
* System
|
|
- Instance Logo (logo visible in sign in/sign up pages)
|
|
- Header Logo (one displayed in the navigation bar)
|
|
* Group
|
|
- Group avatars
|
|
* User
|
|
- User avatars
|
|
- User snippet attachments
|
|
* Project
|
|
- Project avatars
|
|
- Issues/MR/Notes Markdown attachments
|
|
- Issues/MR/Notes Legacy Markdown attachments
|
|
- CI Artifacts (archive, metadata, trace)
|
|
- LFS Objects
|
|
|
|
|
|
## Disk storage
|
|
|
|
GitLab started saving everything on local disk. While directory location changed from previous versions,
|
|
they are still not 100% standardized. You can see them below:
|
|
|
|
| Description | In DB? | Relative path (from CarrierWave.root) | Uploader class | model_type |
|
|
| ------------------------------------- | ------ | ----------------------------------------------------------- | ---------------------- | ---------- |
|
|
| Instance logo | yes | uploads/-/system/appearance/logo/:id/:filename | `AttachmentUploader` | Appearance |
|
|
| Header logo | yes | uploads/-/system/appearance/header_logo/:id/:filename | `AttachmentUploader` | Appearance |
|
|
| Group avatars | yes | uploads/-/system/group/avatar/:id/:filename | `AvatarUploader` | Group |
|
|
| User avatars | yes | uploads/-/system/user/avatar/:id/:filename | `AvatarUploader` | User |
|
|
| User snippet attachments | yes | uploads/-/system/personal_snippet/:id/:random_hex/:filename | `PersonalFileUploader` | Snippet |
|
|
| Project avatars | yes | uploads/-/system/project/avatar/:id/:filename | `AvatarUploader` | Project |
|
|
| Issues/MR/Notes Markdown attachments | yes | uploads/:project_path_with_namespace/:random_hex/:filename | `FileUploader` | Project |
|
|
| Issues/MR/Notes Legacy Markdown attachments | no | uploads/-/system/note/attachment/:id/:filename | `AttachmentUploader` | Note |
|
|
| CI Artifacts (CE) | yes | shared/artifacts/:disk_hash[0..1]/:disk_hash[2..3]/:disk_hash/:year_:month_:date/:job_id/:job_artifact_id (:disk_hash is SHA256 digest of project_id) | `JobArtifactUploader` | Ci::JobArtifact |
|
|
| LFS Objects (CE) | yes | shared/lfs-objects/:hex/:hex/:object_hash | `LfsObjectUploader` | LfsObject |
|
|
|
|
CI Artifacts and LFS Objects behave differently in CE and EE. In CE they inherit the `GitlabUploader`
|
|
while in EE they inherit the `ObjectStorage` and store files in and S3 API compatible object store.
|
|
|
|
In the case of Issues/MR/Notes Markdown attachments, there is a different approach using the [Hashed Storage] layout,
|
|
instead of basing the path into a mutable variable `:project_path_with_namespace`, it's possible to use the
|
|
hash of the project ID instead, if project migrates to the new approach (introduced in 10.2).
|
|
|
|
### Path segments
|
|
|
|
Files are stored at multiple locations and use different path schemes.
|
|
All the `GitlabUploader` derived classes should comply with this path segment schema:
|
|
|
|
```
|
|
| GitlabUploader
|
|
| ----------------------- + ------------------------- + --------------------------------- + -------------------------------- |
|
|
| `<gitlab_root>/public/` | `uploads/-/system/` | `user/avatar/:id/` | `:filename` |
|
|
| ----------------------- + ------------------------- + --------------------------------- + -------------------------------- |
|
|
| `CarrierWave.root` | `GitlabUploader.base_dir` | `GitlabUploader#dynamic_segment` | `CarrierWave::Uploader#filename` |
|
|
| | `CarrierWave::Uploader#store_dir` | |
|
|
|
|
| FileUploader
|
|
| ----------------------- + ------------------------- + --------------------------------- + -------------------------------- |
|
|
| `<gitlab_root>/shared/` | `artifacts/` | `:year_:month/:id` | `:filename` |
|
|
| `<gitlab_root>/shared/` | `snippets/` | `:secret/` | `:filename` |
|
|
| ----------------------- + ------------------------- + --------------------------------- + -------------------------------- |
|
|
| `CarrierWave.root` | `GitlabUploader.base_dir` | `GitlabUploader#dynamic_segment` | `CarrierWave::Uploader#filename` |
|
|
| | `CarrierWave::Uploader#store_dir` | |
|
|
| | | `FileUploader#upload_path |
|
|
|
|
| ObjectStore::Concern (store = remote)
|
|
| ----------------------- + ------------------------- + ----------------------------------- + -------------------------------- |
|
|
| `<bucket_name>` | <ignored> | `user/avatar/:id/` | `:filename` |
|
|
| ----------------------- + ------------------------- + ----------------------------------- + -------------------------------- |
|
|
| `#fog_dir` | `GitlabUploader.base_dir` | `GitlabUploader#dynamic_segment` | `CarrierWave::Uploader#filename` |
|
|
| | | `ObjectStorage::Concern#store_dir` | |
|
|
| | | `ObjectStorage::Concern#upload_path |
|
|
```
|
|
|
|
The `RecordsUploads::Concern` concern will create an `Upload` entry for every file stored by a `GitlabUploader` persisting the dynamic parts of the path using
|
|
`GitlabUploader#dynamic_path`. You may then use the `Upload#build_uploader` method to manipulate the file.
|
|
|
|
## Object Storage
|
|
|
|
By including the `ObjectStorage::Concern` in the `GitlabUploader` derived class, you may enable the object storage for this uploader. To enable the object storage
|
|
in your uploader, you need to either 1) include `RecordsUpload::Concern` and prepend `ObjectStorage::Extension::RecordsUploads` or 2) mount the uploader and create a new field named `<mount>_store`.
|
|
|
|
The `CarrierWave::Uploader#store_dir` is overridden to
|
|
|
|
- `GitlabUploader.base_dir` + `GitlabUploader.dynamic_segment` when the store is LOCAL
|
|
- `GitlabUploader.dynamic_segment` when the store is REMOTE (the bucket name is used to namespace)
|
|
|
|
### Using `ObjectStorage::Extension::RecordsUploads`
|
|
|
|
> Note: this concern will automatically include `RecordsUploads::Concern` if not already included.
|
|
|
|
The `ObjectStorage::Concern` uploader will search for the matching `Upload` to select the correct object store. The `Upload` is mapped using `#store_dirs + identifier` for each store (LOCAL/REMOTE).
|
|
|
|
```ruby
|
|
class SongUploader < GitlabUploader
|
|
include RecordsUploads::Concern
|
|
include ObjectStorage::Concern
|
|
prepend ObjectStorage::Extension::RecordsUploads
|
|
|
|
...
|
|
end
|
|
|
|
class Thing < ActiveRecord::Base
|
|
mount :theme, SongUploader # we have a great theme song!
|
|
|
|
...
|
|
end
|
|
```
|
|
|
|
### Using a mounted uploader
|
|
|
|
The `ObjectStorage::Concern` will query the `model.<mount>_store` attribute to select the correct object store.
|
|
This column must be present in the model schema.
|
|
|
|
```ruby
|
|
class SongUploader < GitlabUploader
|
|
include ObjectStorage::Concern
|
|
|
|
...
|
|
end
|
|
|
|
class Thing < ActiveRecord::Base
|
|
attr_reader :theme_store # this is an ActiveRecord attribute
|
|
mount :theme, SongUploader # we have a great theme song!
|
|
|
|
def theme_store
|
|
super || ObjectStorage::Store::LOCAL
|
|
end
|
|
|
|
...
|
|
end
|
|
```
|
|
|
|
[CarrierWave]: https://github.com/carrierwaveuploader/carrierwave
|
|
[Hashed Storage]: ../administration/repository_storage_types.md
|