Integrity check Rake task (CORE ONLY)
GitLab provides Rake tasks to check the integrity of various components.
Repository integrity
Even though Git is very resilient and tries to prevent data integrity issues, there are times when things go wrong. The following Rake tasks intend to help GitLab administrators diagnose problem repositories so they can be fixed.
There are 3 things that are checked to determine integrity.
- Git repository file system check (
git fsck
). This step verifies the connectivity and validity of objects in the repository. - Check for
config.lock
in the repository directory. - Check for any branch/references lock files in
refs/heads
.
It's important to note that the existence of config.lock
or reference locks
alone do not necessarily indicate a problem. Lock files are routinely created
and removed as Git and GitLab perform operations on the repository. They serve
to prevent data integrity issues. However, if a Git operation is interrupted these
locks may not be cleaned up properly.
The following symptoms may indicate a problem with repository integrity. If users experience these symptoms you may use the Rake tasks described below to determine exactly which repositories are causing the trouble.
- Receiving an error when trying to push code -
remote: error: cannot lock ref
- A 500 error when viewing the GitLab dashboard or when accessing a specific project.
Check all GitLab repositories
This task loops through all repositories on the GitLab server and runs the integrity check described previously.
Omnibus Installation
sudo gitlab-rake gitlab:git:fsck
Source Installation
sudo -u git -H bundle exec rake gitlab:git:fsck RAILS_ENV=production
Uploaded files integrity
Various types of files can be uploaded to a GitLab installation by users. These integrity checks can detect missing files. Additionally, for locally stored files, checksums are generated and stored in the database upon upload, and these checks verify them against current files.
Currently, integrity checks are supported for the following types of file:
- CI artifacts (Available from version 10.7.0)
- LFS objects (Available from version 10.6.0)
- User uploads (Available from version 10.6.0)
Omnibus Installation
sudo gitlab-rake gitlab:artifacts:check
sudo gitlab-rake gitlab:lfs:check
sudo gitlab-rake gitlab:uploads:check
Source Installation
sudo -u git -H bundle exec rake gitlab:artifacts:check RAILS_ENV=production
sudo -u git -H bundle exec rake gitlab:lfs:check RAILS_ENV=production
sudo -u git -H bundle exec rake gitlab:uploads:check RAILS_ENV=production
These tasks also accept some environment variables which you can use to override certain values:
Variable | Type | Description |
---|---|---|
BATCH |
integer | Specifies the size of the batch. Defaults to 200. |
ID_FROM |
integer | Specifies the ID to start from, inclusive of the value. |
ID_TO |
integer | Specifies the ID value to end at, inclusive of the value. |
VERBOSE |
boolean | Causes failures to be listed individually, rather than being summarized. |
sudo gitlab-rake gitlab:artifacts:check BATCH=100 ID_FROM=50 ID_TO=250
sudo gitlab-rake gitlab:lfs:check BATCH=100 ID_FROM=50 ID_TO=250
sudo gitlab-rake gitlab:uploads:check BATCH=100 ID_FROM=50 ID_TO=250
Example output:
$ sudo gitlab-rake gitlab:uploads:check
Checking integrity of Uploads
- 1..1350: Failures: 0
- 1351..2743: Failures: 0
- 2745..4349: Failures: 2
- 4357..5762: Failures: 1
- 5764..7140: Failures: 2
- 7142..8651: Failures: 0
- 8653..10134: Failures: 0
- 10135..11773: Failures: 0
- 11777..13315: Failures: 0
Done!
Example verbose output:
$ sudo gitlab-rake gitlab:uploads:check VERBOSE=1
Checking integrity of Uploads
- 1..1350: Failures: 0
- 1351..2743: Failures: 0
- 2745..4349: Failures: 2
- Upload: 3573: #<Errno::ENOENT: No such file or directory @ rb_sysopen - /opt/gitlab/embedded/service/gitlab-rails/public/uploads/user-foo/project-bar/7a77cc52947bfe188adeff42f890bb77/image.png>
- Upload: 3580: #<Errno::ENOENT: No such file or directory @ rb_sysopen - /opt/gitlab/embedded/service/gitlab-rails/public/uploads/user-foo/project-bar/2840ba1ba3b2ecfa3478a7b161375f8a/pug.png>
- 4357..5762: Failures: 1
- Upload: 4636: #<Google::Apis::ServerError: Server error>
- 5764..7140: Failures: 2
- Upload: 5812: #<NoMethodError: undefined method `hashed_storage?' for nil:NilClass>
- Upload: 5837: #<NoMethodError: undefined method `hashed_storage?' for nil:NilClass>
- 7142..8651: Failures: 0
- 8653..10134: Failures: 0
- 10135..11773: Failures: 0
- 11777..13315: Failures: 0
Done!
LDAP check
The LDAP check Rake task tests the bind DN and password credentials
(if configured) and lists a sample of LDAP users. This task is also
executed as part of the gitlab:check
task, but can run independently.
See LDAP Rake Tasks - LDAP Check for details.
Troubleshooting
The following are solutions to problems you might discover using the Rake tasks documented above.
Dangling commits
gitlab:git:fsck
can find dangling commits. To fix them, try
manually triggering housekeeping
for the affected project(s).
If the issue persists, try triggering gc
via the
Rails Console:
p = Project.find_by_path("project-name")
Projects::HousekeepingService.new(p, :gc).execute
Delete references to missing remote uploads
gitlab-rake gitlab:uploads:check VERBOSE=1
detects remote objects that do not exist because they were
deleted externally but their references still exist in the GitLab database.
Example output with error message:
$ sudo gitlab-rake gitlab:uploads:check VERBOSE=1
Checking integrity of Uploads
- 100..434: Failures: 2
- Upload: 100: Remote object does not exist
- Upload: 101: Remote object does not exist
Done!
To delete these references to remote uploads that were deleted externally, open the GitLab Rails Console and run:
uploads_deleted=0
Upload.find_each do |upload|
next if upload.retrieve_uploader.file.exists?
uploads_deleted=uploads_deleted + 1
p upload ### allow verification before destroy
# p upload.destroy! ### uncomment to actually destroy
end
p "#{uploads_deleted} remote objects were destroyed."