--- stage: Enablement group: Distribution info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments --- # Integrity check Rake task **(FREE SELF)** 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`](https://git-scm.com/docs/git-fsck)). This step verifies the connectivity and validity of objects in the repository. 1. Check for `config.lock` in the repository directory. 1. 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 project code repositories This task loops through the project code repositories and runs the integrity check described previously. If a project uses a pool repository, that will also be checked. Other types of Git repositories [are not checked](https://gitlab.com/gitlab-org/gitaly/-/issues/3643). **Omnibus Installation** ```shell sudo gitlab-rake gitlab:git:fsck ``` **Source Installation** ```shell sudo -u git -H bundle exec rake gitlab:git:fsck RAILS_ENV=production ``` ## Checksum of repository refs One Git repository can be compared to another by checksumming all refs of each repository. If both repositories have the same refs, and if both repositories pass an integrity check, then we can be confident that both repositories are the same. For example, this can be used to compare a backup of a repository against the source repository. ### Check all GitLab repositories This task loops through all repositories on the GitLab server and outputs checksums in the format `,`. - If a repository doesn't exist, the project ID will have a blank checksum. - If a repository exists but is empty, the output checksum is `0000000000000000000000000000000000000000`. - Projects which don't exist are skipped. **Omnibus Installation** ```shell sudo gitlab-rake gitlab:git:checksum_projects ``` **Source Installation** ```shell sudo -u git -H bundle exec rake gitlab:git:checksum_projects RAILS_ENV=production ``` For example, if: - Project with ID#2 doesn't exist, it will be skipped. - Project with ID#4 doesn't have a repository, its checksum will be blank. - Project with ID#5 has an empty repository, its checksum will be `0000000000000000000000000000000000000000`. The output would then look something like: ```plaintext 1,cfa3f06ba235c13df0bb28e079bcea62c5848af2 3,3f3fb58a8106230e3a6c6b48adc2712fb3b6ef87 4, 5,0000000000000000000000000000000000000000 6,6c6b48adc2712fb3b6ef87cfa3f06ba235c13df0 ``` ### Check specific GitLab repositories Optionally, specific project IDs can be checksummed by setting an environment variable `CHECKSUM_PROJECT_IDS` with a list of comma-separated integers, for example: ```shell CHECKSUM_PROJECT_IDS="1,3" sudo gitlab-rake gitlab:git:checksum_projects ``` ## 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** ```shell sudo gitlab-rake gitlab:artifacts:check sudo gitlab-rake gitlab:lfs:check sudo gitlab-rake gitlab:uploads:check ``` **Source Installation** ```shell 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. ```shell 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: ```shell $ 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: ```shell $ 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: # - Upload: 3580: # - 4357..5762: Failures: 1 - Upload: 4636: # - 5764..7140: Failures: 2 - Upload: 5812: # - Upload: 5837: # - 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](ldap.md#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](../housekeeping.md#manual-housekeeping) for the affected project(s). If the issue persists, try triggering `gc` via the [Rails Console](../operations/rails_console.md#starting-a-rails-console-session): ```ruby p = Project.find_by_path("project-name") Repositories::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: ```shell $ 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](../operations/rails_console.md#starting-a-rails-console-session) and run: ```ruby 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." ``` ### Delete references to missing artifacts `gitlab-rake gitlab:artifacts:check VERBOSE=1` detects when artifacts (or `job.log` files): - Are deleted outside of GitLab. - Have references still in the GitLab database. When this scenario is detected, the Rake task displays an error message. For example: ```shell Checking integrity of Job artifacts - 3..8: Failures: 2 - Job artifact: 3: # - Job artifact: 8: # Done! ``` To delete these references to missing local artifacts (`job.log` files): 1. Open the [GitLab Rails Console](../operations/rails_console.md#starting-a-rails-console-session). 1. Run the following Ruby code: ```ruby artifacts_deleted = 0 ::Ci::JobArtifact.all.each do |artifact| ### Iterate artifacts # next if artifact.file.filename != "job.log" ### Uncomment if only `job.log` files' references are to be processed next if artifact.file.exists? ### Skip if the file reference is valid artifacts_deleted += 1 puts "#{artifact.id} #{artifact.file.path} is missing." ### Allow verification before destroy # artifact.destroy! ### Uncomment to actually destroy end puts "Count of identified/destroyed invalid references: #{artifacts_deleted}" ``` ### Delete references to missing LFS objects If `gitlab-rake gitlab:lfs:check VERBOSE=1` detects LFS objects that exist in the database but not on disk, [follow the procedure in the LFS documentation](../../topics/git/lfs/index.md#missing-lfs-objects) to remove the database entries.