Back up GitLab

GitLab provides a command line interface to back up your entire instance, including:

Database
Attachments
Git repositories data
CI/CD job output logs
CI/CD job artifacts
LFS objects
Terraform states (introduced in GitLab 14.7)
Container Registry images
GitLab Pages content
Packages (introduced in GitLab 14.7)
Snippets
Group wikis

Backups do not include:

Mattermost data
Redis (and thus Sidekiq jobs)

WARNING: GitLab does not back up any configuration files (/etc/gitlab), TLS keys and certificates, or system files. You are highly advised to read about storing configuration files.

WARNING: The backup command requires additional parameters when your installation is using PgBouncer, for either performance reasons or when using it with a Patroni cluster.

Depending on your version of GitLab, use the following command if you installed GitLab using the Omnibus package:

GitLab 12.2 or later:
```
sudo gitlab-backup create
```
GitLab 12.1 and earlier:
```
gitlab-rake gitlab:backup:create
```

If you installed GitLab from source, use the following command:

sudo -u git -H bundle exec rake gitlab:backup:create RAILS_ENV=production

If you're running GitLab from within a Docker container, run the backup from the host, based on your installed version of GitLab:

GitLab 12.2 or later:

docker exec -t <container name> gitlab-backup create

GitLab 12.1 and earlier:

docker exec -t <container name> gitlab-rake gitlab:backup:create

If you're using the GitLab Helm chart on a Kubernetes cluster, you can run the backup task by using kubectl to run the backup-utility script on the GitLab toolbox pod. For more details, see the charts backup documentation.

Similar to the Kubernetes case, if you have scaled out your GitLab cluster to use multiple application servers, you should pick a designated node (that isn't auto-scaled away) for running the backup Rake task. Because the backup Rake task is tightly coupled to the main Rails application, this is typically a node on which you're also running Puma or Sidekiq.

Example output:

Dumping database tables:
- Dumping table events... [DONE]
- Dumping table issues... [DONE]
- Dumping table keys... [DONE]
- Dumping table merge_requests... [DONE]
- Dumping table milestones... [DONE]
- Dumping table namespaces... [DONE]
- Dumping table notes... [DONE]
- Dumping table projects... [DONE]
- Dumping table protected_branches... [DONE]
- Dumping table schema_migrations... [DONE]
- Dumping table services... [DONE]
- Dumping table snippets... [DONE]
- Dumping table taggings... [DONE]
- Dumping table tags... [DONE]
- Dumping table users... [DONE]
- Dumping table users_projects... [DONE]
- Dumping table web_hooks... [DONE]
- Dumping table wikis... [DONE]
Dumping repositories:
- Dumping repository abcd... [DONE]
Creating backup archive: $TIMESTAMP_gitlab_backup.tar [DONE]
Deleting tmp directories...[DONE]
Deleting old backups... [SKIPPING]

Storing configuration files

The backup Rake task GitLab provides does not store your configuration files. The primary reason for this is that your database contains items including encrypted information for two-factor authentication and the CI/CD secure variables. Storing encrypted information in the same location as its key defeats the purpose of using encryption in the first place.

WARNING: The secrets file is essential to preserve your database encryption key.

At the very minimum, you must back up:

For Omnibus:

/etc/gitlab/gitlab-secrets.json
/etc/gitlab/gitlab.rb

For installation from source:

/home/git/gitlab/config/secrets.yml
/home/git/gitlab/config/gitlab.yml

For Docker installations, you must back up the volume where the configuration files are stored. If you created the GitLab container according to the documentation, it should be in the /srv/gitlab/config directory.

For GitLab Helm chart installations on a Kubernetes cluster, you must follow the Back up the secrets instructions.

You may also want to back up any TLS keys and certificates (/etc/gitlab/ssl, /etc/gitlab/trusted-certs), and your SSH host keys to avoid man-in-the-middle attack warnings if you have to perform a full machine restore.

If you use Omnibus GitLab, review additional information to backup your configuration.

In the unlikely event that the secrets file is lost, see the troubleshooting section.

Backup options

The command line tool GitLab provides to backup your instance can accept more options.

Backup strategy option

The default backup strategy is to essentially stream data from the respective data locations to the backup using the Linux command tar and gzip. This works fine in most cases, but can cause problems when data is rapidly changing.

When data changes while tar is reading it, the error file changed as we read it may occur, and causes the backup process to fail. To combat this, 8.17 introduces a new backup strategy called copy. The strategy copies data files to a temporary location before calling tar and gzip, avoiding the error.

A side-effect is that the backup process takes up to an additional 1X disk space. The process does its best to clean up the temporary files at each stage so the problem doesn't compound, but it could be a considerable change for large installations. This is why the copy strategy is not the default in 8.17.

To use the copy strategy instead of the default streaming strategy, specify STRATEGY=copy in the Rake task command. For example:

sudo gitlab-backup create STRATEGY=copy

Users of GitLab 12.1 and earlier should use the command gitlab-rake gitlab:backup:create instead.

Backup filename

WARNING: If you use a custom backup filename, you can't limit the lifetime of the backups.

By default, a backup file is created according to the specification in the previous Backup timestamp section. You can, however, override the [TIMESTAMP] portion of the filename by setting the BACKUP environment variable. For example:

sudo gitlab-backup create BACKUP=dump

Users of GitLab 12.1 and earlier should use the command gitlab-rake gitlab:backup:create instead.

The resulting file is named dump_gitlab_backup.tar. This is useful for systems that make use of rsync and incremental backups, and results in considerably faster transfer speeds.

Confirm archive can be transferred

To ensure the generated archive is transferable by rsync, you can set the GZIP_RSYNCABLE=yes option. This sets the --rsyncable option to gzip, which is useful only in combination with setting the Backup filename option.

Note that the --rsyncable option in gzip isn't guaranteed to be available on all distributions. To verify that it's available in your distribution, run gzip --help or consult the man pages.

sudo gitlab-backup create BACKUP=dump GZIP_RSYNCABLE=yes

Users of GitLab 12.1 and earlier should use the command gitlab-rake gitlab:backup:create instead.

Excluding specific directories from the backup

You can exclude specific directories from the backup by adding the environment variable SKIP, whose values are a comma-separated list of the following options:

db (database)
uploads (attachments)
builds (CI job output logs)
artifacts (CI job artifacts)
lfs (LFS objects)
terraform_state (Terraform states)
registry (Container Registry images)
pages (Pages content)
repositories (Git repositories data)
packages (Packages)

All wikis are backed up as part of the repositories group. Non-existent wikis are skipped during a backup.

NOTE: When backing up and restoring Helm Charts, there is an additional option packages, which refers to any packages managed by the GitLab package registry. For more information see command line arguments.

All wikis are backed up as part of the repositories group. Non-existent wikis are skipped during a backup.

For Omnibus GitLab packages:

sudo gitlab-backup create SKIP=db,uploads

Users of GitLab 12.1 and earlier should use the command gitlab-rake gitlab:backup:create instead.

For installations from source:

sudo -u git -H bundle exec rake gitlab:backup:create SKIP=db,uploads RAILS_ENV=production

Skipping tar creation

NOTE: It is not possible to skip the tar creation when using object storage for backups.

The last part of creating a backup is generation of a .tar file containing all the parts. In some cases (for example, if the backup is picked up by other backup software) creating a .tar file might be wasted effort or even directly harmful, so you can skip this step by adding tar to the SKIP environment variable.

Adding tar to the SKIP variable leaves the files and directories containing the backup in the directory used for the intermediate files. These files are overwritten when a new backup is created, so you should make sure they are copied elsewhere, because you can only have one backup on the system.

For Omnibus GitLab packages:

sudo gitlab-backup create SKIP=tar

For installations from source:

sudo -u git -H bundle exec rake gitlab:backup:create SKIP=tar RAILS_ENV=production

Back up Git repositories concurrently

Introduced in GitLab 13.3.

Concurrent restore introduced in GitLab 14.3

When using multiple repository storages, repositories can be backed up or restored concurrently to help fully use CPU time. The following variables are available to modify the default behavior of the Rake task:

GITLAB_BACKUP_MAX_CONCURRENCY: The maximum number of projects to back up at the same time. Defaults to the number of logical CPUs (in GitLab 14.1 and earlier, defaults to 1).
GITLAB_BACKUP_MAX_STORAGE_CONCURRENCY: The maximum number of projects to back up at the same time on each storage. This allows the repository backups to be spread across storages. Defaults to 2 (in GitLab 14.1 and earlier, defaults to 1).

For example, for Omnibus GitLab installations with 4 repository storages:

sudo gitlab-backup create GITLAB_BACKUP_MAX_CONCURRENCY=4 GITLAB_BACKUP_MAX_STORAGE_CONCURRENCY=1

For example, for installations from source:

sudo -u git -H bundle exec rake gitlab:backup:create GITLAB_BACKUP_MAX_CONCURRENCY=4 GITLAB_BACKUP_MAX_STORAGE_CONCURRENCY=1

Incremental repository backups

Introduced in GitLab 14.9 with a flag named incremental_repository_backup. Disabled by default.

Enabled on self-managed in GitLab 14.10.

PREVIOUS_BACKUP option introduced in GitLab 15.0.

FLAG: On self-managed GitLab, by default this feature is available. To hide the feature, ask an administrator to disable the feature flag named incremental_repository_backup. On GitLab.com, this feature is not available.

Incremental backups can be faster than full backups because they only pack changes since the last backup into the backup bundle for each repository. There must be an existing backup to create an incremental backup from:

In GitLab 14.9 and 14.10, use the BACKUP=<timestamp_of_backup> option to choose the backup to use. The chosen previous backup is overwritten.
In GitLab 15.0 and later, use the PREVIOUS_BACKUP=<timestamp_of_backup> option to choose the backup to use. By default, a backup file is created as documented in the Backup timestamp section. You can override the [TIMESTAMP] portion of the filename by setting the BACKUP environment variable.

To create an incremental backup, run:

sudo gitlab-backup create INCREMENTAL=yes PREVIOUS_BACKUP=<timestamp_of_backup>

Incremental backups can also be created from an untarred backup by using SKIP=tar:

sudo gitlab-backup create INCREMENTAL=yes SKIP=tar

Back up specific repository storages

Introduced in GitLab 15.0.

When using multiple repository storages, repositories from specific repository storages can be backed up separately using the REPOSITORIES_STORAGES option. The option accepts a comma-separated list of storage names.

For example, for Omnibus GitLab installations:

sudo gitlab-backup create REPOSITORIES_STORAGES=storage1,storage2

For example, for installations from source:

sudo -u git -H bundle exec rake gitlab:backup:create REPOSITORIES_STORAGES=storage1,storage2

Back up specific repositories

Introduced in GitLab 15.1.

You can back up a specific repositories using the REPOSITORIES_PATHS option. The option accepts a comma-separated list of project and group paths. If you specify a group path, all repositories in all projects in the group and descendent groups are included.

For example, to back up all repositories for all projects in Group A (group-a), and the repository for Project C in Group B (group-b/project-c):

Omnibus GitLab installations:

sudo gitlab-backup create REPOSITORIES_PATHS=group-a,group-b/project-c

Installations from source:

sudo -u git -H bundle exec rake gitlab:backup:create REPOSITORIES_PATHS=group-a,group-b/project-c

Uploading backups to a remote (cloud) storage

NOTE: It is not possible to skip the tar creation when using object storage for backups.

You can let the backup script upload (using the Fog library) the .tar file it creates. In the following example, we use Amazon S3 for storage, but Fog also lets you use other storage providers. GitLab also imports cloud drivers for AWS, Google, OpenStack Swift, Rackspace, and Aliyun. A local driver is also available.

Using Amazon S3

For Omnibus GitLab packages:

Add the following to /etc/gitlab/gitlab.rb:

gitlab_rails['backup_upload_connection'] = {
  'provider' => 'AWS',
  'region' => 'eu-west-1',
  'aws_access_key_id' => 'AKIAKIAKI',
  'aws_secret_access_key' => 'secret123'
  # If using an IAM Profile, don't configure aws_access_key_id & aws_secret_access_key
  # 'use_iam_profile' => true
}
gitlab_rails['backup_upload_remote_directory'] = 'my.s3.bucket'

Reconfigure GitLab for the changes to take effect

S3 Encrypted Buckets

Introduced in GitLab 14.3.

AWS supports these modes for server side encryption:

Amazon S3-Managed Keys (SSE-S3)
Customer Master Keys (CMKs) Stored in AWS Key Management Service (SSE-KMS)
Customer-Provided Keys (SSE-C)

Use your mode of choice with GitLab. Each mode has similar, but slightly different, configuration methods.

SSE-S3

To enable SSE-S3, in the backup storage options set the server_side_encryption field to AES256. For example, in Omnibus GitLab:

gitlab_rails['backup_upload_storage_options'] = {
  'server_side_encryption' => 'AES256'
}

SSE-KMS

To enable SSE-KMS, you'll need the KMS key via its Amazon Resource Name (ARN) in the arn:aws:kms:region:acct-id:key/key-id format. Under the backup_upload_storage_options configuration setting, set:

server_side_encryption to aws:kms.
server_side_encryption_kms_key_id to the ARN of the key.

For example, in Omnibus GitLab:

gitlab_rails['backup_upload_storage_options'] = {
  'server_side_encryption' => 'aws:kms',
  'server_side_encryption_kms_key_id' => 'arn:aws:<YOUR KMS KEY ID>:'
}

SSE-C

SSE-C requires you to set these encryption options:

backup_encryption: AES256.
backup_encryption_key: Unencoded, 32-byte (256 bits) key. The upload fails if this isn't exactly 32 bytes.

For example, in Omnibus GitLab:

gitlab_rails['backup_encryption'] = 'AES256'
gitlab_rails['backup_encryption_key'] = '<YOUR 32-BYTE KEY HERE>'

If the key contains binary characters and cannot be encoded in UTF-8, instead, specify the key with the GITLAB_BACKUP_ENCRYPTION_KEY environment variable. For example:

gitlab_rails['env'] = { 'GITLAB_BACKUP_ENCRYPTION_KEY' => "\xDE\xAD\xBE\xEF" * 8 }

Digital Ocean Spaces

This example can be used for a bucket in Amsterdam (AMS3):

Add the following to /etc/gitlab/gitlab.rb:

gitlab_rails['backup_upload_connection'] = {
  'provider' => 'AWS',
  'region' => 'ams3',
  'aws_access_key_id' => 'AKIAKIAKI',
  'aws_secret_access_key' => 'secret123',
  'endpoint'              => 'https://ams3.digitaloceanspaces.com'
}
gitlab_rails['backup_upload_remote_directory'] = 'my.s3.bucket'

Reconfigure GitLab for the changes to take effect

If you see a 400 Bad Request error message when using Digital Ocean Spaces, the cause may be the use of backup encryption. Because Digital Ocean Spaces doesn't support encryption, remove or comment the line that contains gitlab_rails['backup_encryption'].

Other S3 Providers

Not all S3 providers are fully compatible with the Fog library. For example, if you see a 411 Length Required error message after attempting to upload, you may need to downgrade the aws_signature_version value from the default value to 2, due to this issue.

For installations from source:

Edit home/git/gitlab/config/gitlab.yml:

  backup:
    # snip
    upload:
      # Fog storage connection settings, see https://fog.io/storage/ .
      connection:
        provider: AWS
        region: eu-west-1
        aws_access_key_id: AKIAKIAKI
        aws_secret_access_key: 'secret123'
        # If using an IAM Profile, leave aws_access_key_id & aws_secret_access_key empty
        # ie. aws_access_key_id: ''
        # use_iam_profile: 'true'
      # The remote 'directory' to store your backups. For S3, this would be the bucket name.
      remote_directory: 'my.s3.bucket'
      # Specifies Amazon S3 storage class to use for backups, this is optional
      # storage_class: 'STANDARD'
      #
      # Turns on AWS Server-Side Encryption with Amazon Customer-Provided Encryption Keys for backups, this is optional
      #   'encryption' must be set in order for this to have any effect.
      #   'encryption_key' should be set to the 256-bit encryption key for Amazon S3 to use to encrypt or decrypt.
      #   To avoid storing the key on disk, the key can also be specified via the `GITLAB_BACKUP_ENCRYPTION_KEY`  your data.
      # encryption: 'AES256'
      # encryption_key: '<key>'
      #
      #
      # Turns on AWS Server-Side Encryption with Amazon S3-Managed keys (optional)
      # https://docs.aws.amazon.com/AmazonS3/latest/userguide/serv-side-encryption.html
      # For SSE-S3, set 'server_side_encryption' to 'AES256'.
      # For SS3-KMS, set 'server_side_encryption' to 'aws:kms'. Set
      # 'server_side_encryption_kms_key_id' to the ARN of customer master key.
      # storage_options:
      #   server_side_encryption: 'aws:kms'
      #   server_side_encryption_kms_key_id: 'arn:aws:kms:YOUR-KEY-ID-HERE'

Restart GitLab for the changes to take effect

If you're uploading your backups to S3, you should create a new IAM user with restricted access rights. To give the upload user access only for uploading backups create the following IAM profile, replacing my.s3.bucket with the name of your bucket:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "Stmt1412062044000",
      "Effect": "Allow",
      "Action": [
        "s3:AbortMultipartUpload",
        "s3:GetBucketAcl",
        "s3:GetBucketLocation",
        "s3:GetObject",
        "s3:GetObjectAcl",
        "s3:ListBucketMultipartUploads",
        "s3:PutObject",
        "s3:PutObjectAcl"
      ],
      "Resource": [
        "arn:aws:s3:::my.s3.bucket/*"
      ]
    },
    {
      "Sid": "Stmt1412062097000",
      "Effect": "Allow",
      "Action": [
        "s3:GetBucketLocation",
        "s3:ListAllMyBuckets"
      ],
      "Resource": [
        "*"
      ]
    },
    {
      "Sid": "Stmt1412062128000",
      "Effect": "Allow",
      "Action": [
        "s3:ListBucket"
      ],
      "Resource": [
        "arn:aws:s3:::my.s3.bucket"
      ]
    }
  ]
}

Using Google Cloud Storage

To use Google Cloud Storage to save backups, you must first create an access key from the Google console:

Go to the Google storage settings page.
Select Interoperability, and then create an access key.
Make note of the Access Key and Secret and replace them in the following configurations.
In the buckets advanced settings ensure the Access Control option Set object-level and bucket-level permissions is selected.
Ensure you have already created a bucket.

For Omnibus GitLab packages:

Edit /etc/gitlab/gitlab.rb:

gitlab_rails['backup_upload_connection'] = {
  'provider' => 'Google',
  'google_storage_access_key_id' => 'Access Key',
  'google_storage_secret_access_key' => 'Secret',

  ## If you have CNAME buckets (foo.example.com), you might run into SSL issues
  ## when uploading backups ("hostname foo.example.com.storage.googleapis.com
  ## does not match the server certificate"). In that case, uncomnent the following
  ## setting. See: https://github.com/fog/fog/issues/2834
  #'path_style' => true
}
gitlab_rails['backup_upload_remote_directory'] = 'my.google.bucket'

Reconfigure GitLab for the changes to take effect

For installations from source:

Edit home/git/gitlab/config/gitlab.yml:

  backup:
    upload:
      connection:
        provider: 'Google'
        google_storage_access_key_id: 'Access Key'
        google_storage_secret_access_key: 'Secret'
      remote_directory: 'my.google.bucket'

Restart GitLab for the changes to take effect

Using Azure Blob storage

Introduced in GitLab 13.4.

For Omnibus GitLab packages:

Edit /etc/gitlab/gitlab.rb:

gitlab_rails['backup_upload_connection'] = {
 'provider' => 'AzureRM',
 'azure_storage_account_name' => '<AZURE STORAGE ACCOUNT NAME>',
 'azure_storage_access_key' => '<AZURE STORAGE ACCESS KEY>',
 'azure_storage_domain' => 'blob.core.windows.net', # Optional
}
gitlab_rails['backup_upload_remote_directory'] = '<AZURE BLOB CONTAINER>'

Reconfigure GitLab for the changes to take effect

For installations from source:

Edit home/git/gitlab/config/gitlab.yml:

  backup:
    upload:
      connection:
        provider: 'AzureRM'
        azure_storage_account_name: '<AZURE STORAGE ACCOUNT NAME>'
        azure_storage_access_key: '<AZURE STORAGE ACCESS KEY>'
      remote_directory: '<AZURE BLOB CONTAINER>'

Restart GitLab for the changes to take effect

For more details, see the table of Azure parameters.

Specifying a custom directory for backups

This option works only for remote storage. If you want to group your backups, you can pass a DIRECTORY environment variable:

sudo gitlab-backup create DIRECTORY=daily
sudo gitlab-backup create DIRECTORY=weekly

Users of GitLab 12.1 and earlier should use the command gitlab-rake gitlab:backup:create instead.

Skip uploading backups to remote storage

If you have configured GitLab to upload backups in a remote storage, you can use the SKIP=remote option to skip uploading your backups to the remote storage.

For Omnibus GitLab packages:

sudo gitlab-backup create SKIP=remote

For installations from source:

sudo -u git -H bundle exec rake gitlab:backup:create SKIP=remote RAILS_ENV=production

Uploading to locally mounted shares

You may also send backups to a mounted share (for example, NFS,CIFS, or SMB) by using the Fog Local storage provider. The directory pointed to by the local_root key must be owned by the git user when mounted (mounting with the uid= of the git user for CIFS and SMB) or the user that you are executing the backup tasks as (for Omnibus packages, this is the git user).

The backup_upload_remote_directory must be set in addition to the local_root key. This is the sub directory inside the mounted directory that backups are copied to, and is created if it does not exist. If the directory that you want to copy the tarballs to is the root of your mounted directory, use . instead.

Because file system performance may affect overall GitLab performance, GitLab doesn't recommend using cloud-based file systems for storage.

For Omnibus GitLab packages:

Edit /etc/gitlab/gitlab.rb:

gitlab_rails['backup_upload_connection'] = {
  :provider => 'Local',
  :local_root => '/mnt/backups'
}

# The directory inside the mounted folder to copy backups to
# Use '.' to store them in the root directory
gitlab_rails['backup_upload_remote_directory'] = 'gitlab_backups'

Reconfigure GitLab for the changes to take effect.

For installations from source:

Edit home/git/gitlab/config/gitlab.yml:

backup:
  upload:
    # Fog storage connection settings, see https://fog.io/storage/ .
    connection:
      provider: Local
      local_root: '/mnt/backups'
    # The directory inside the mounted folder to copy backups to
    # Use '.' to store them in the root directory
    remote_directory: 'gitlab_backups'

Restart GitLab for the changes to take effect.

Backup archive permissions

The backup archives created by GitLab (1393513186_2014_02_27_gitlab_backup.tar) have the owner/group git/git and 0600 permissions by default. This is meant to avoid other system users reading GitLab data. If you need the backup archives to have different permissions, you can use the archive_permissions setting.

For Omnibus GitLab packages:

Edit /etc/gitlab/gitlab.rb:

gitlab_rails['backup_archive_permissions'] = 0644 # Makes the backup archives world-readable

Reconfigure GitLab for the changes to take effect.

For installations from source:

Edit /home/git/gitlab/config/gitlab.yml:

backup:
  archive_permissions: 0644 # Makes the backup archives world-readable

Restart GitLab for the changes to take effect.

Configuring cron to make daily backups

WARNING: The following cron jobs do not back up your GitLab configuration files or SSH host keys.

You can schedule a cron job that backs up your repositories and GitLab metadata.

For Omnibus GitLab packages:

Edit the crontab for the root user:
```
sudo su -
crontab -e
```
There, add the following line to schedule the backup for everyday at 2 AM:
```
0 2 * * * /opt/gitlab/bin/gitlab-backup create CRON=1
```
Users of GitLab 12.1 and earlier should use the command gitlab-rake gitlab:backup:create instead.

For installations from source:

Edit the crontab for the git user:
```
sudo -u git crontab -e
```

Add the following lines at the bottom:

# Create a full backup of the GitLab repositories and SQL database every day at 2am
0 2 * * * cd /home/git/gitlab && PATH=/usr/local/bin:/usr/bin:/bin bundle exec rake gitlab:backup:create RAILS_ENV=production CRON=1

The CRON=1 environment setting directs the backup script to hide all progress output if there aren't any errors. This is recommended to reduce cron spam. When troubleshooting backup problems, however, replace CRON=1 with --trace to log verbosely.

Limit backup lifetime for local files (prune old backups)

WARNING: The process described in this section don't work if you used a custom filename for your backups.

To prevent regular backups from using all your disk space, you may want to set a limited lifetime for backups. The next time the backup task runs, backups older than the backup_keep_time are pruned.

This configuration option manages only local files. GitLab doesn't prune old files stored in a third-party object storage because the user may not have permission to list and delete files. It's recommended that you configure the appropriate retention policy for your object storage (for example, AWS S3).

For Omnibus GitLab packages:

Edit /etc/gitlab/gitlab.rb:

## Limit backup lifetime to 7 days - 604800 seconds
gitlab_rails['backup_keep_time'] = 604800

Reconfigure GitLab for the changes to take effect.

For installations from source:

Edit /home/git/gitlab/config/gitlab.yml:

backup:
  ## Limit backup lifetime to 7 days - 604800 seconds
  keep_time: 604800

Restart GitLab for the changes to take effect.