Integrity check Rake task

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.

  1. Git repository file system check (git fsck). This step verifies the connectivity and validity of objects in the repository.
  2. Check for config.lock in the repository directory.
  3. 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 will 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 will test the bind DN and password credentials (if configured) and will list 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.