debian-mirror-gitlab/doc/administration/operations/moving_repositories.md

---
stage: Systems
group: Gitaly
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/product/ux/technical-writing/#assignments
---

# Moving repositories managed by GitLab **(FREE SELF)**

You can move all repositories managed by GitLab to another file system or another server.

## Moving data within a GitLab instance

The GitLab API is the recommended way to move Git repositories:

- Between servers.
- Between different storage.
- From single-node Gitaly to Gitaly Cluster.

For more information, see:

- [Configuring additional storage for Gitaly](../gitaly/configure_gitaly.md#network-architecture). This
  example configures additional storage called `storage1` and `storage2`.
- [The API documentation](../../api/project_repository_storage_moves.md) details the endpoints for
  querying and scheduling project repository moves.
- [The API documentation](../../api/snippet_repository_storage_moves.md) details the endpoints for
  querying and scheduling snippet repository moves.
- [The API documentation](../../api/group_repository_storage_moves.md) details the endpoints for
  querying and scheduling group repository moves **(PREMIUM SELF)**.
- [Migrate to Gitaly Cluster](../gitaly/index.md#migrate-to-gitaly-cluster).

### Move Repositories

GitLab repositories can be associated with projects, groups, and snippets. Each of these types
have a separate API to schedule the respective repositories to move. To move all repositories
on a GitLab instance, each of these types must be scheduled to move for each storage.

WARNING:
To move repositories into a [Gitaly Cluster](../gitaly/index.md#gitaly-cluster) in GitLab versions
13.12 to 14.1, you must [enable the `gitaly_replicate_repository_direct_fetch` feature flag](../feature_flags.md).

WARNING:
Repositories can be **permanently deleted** by a call to `/projects/:project_id/repository_storage_moves`
that attempts to move a project already stored in a Gitaly Cluster back into that cluster.
See [this issue for more details](https://gitlab.com/gitlab-org/gitaly/-/issues/3752). This was fixed in
GitLab 14.3.0 and backported to
[14.2.4](https://about.gitlab.com/releases/2021/09/17/gitlab-14-2-4-released/),
[14.1.6](https://about.gitlab.com/releases/2021/09/27/gitlab-14-1-6-released/),
[14.0.11](https://about.gitlab.com/releases/2021/09/27/gitlab-14-0-11-released/), and
[13.12.12](https://about.gitlab.com/releases/2021/09/22/gitlab-13-12-12-released/).

Each repository is made read-only for the duration of the move. The repository is not writable
until the move has completed.

To move repositories:

1. Ensure all [local and cluster storages](../gitaly/configure_gitaly.md#mixed-configuration) are accessible to the GitLab instance. In
   this example, these are `<original_storage_name>` and `<cluster_storage_name>`.
1. [Configure repository storage weights](../repository_storage_paths.md#configure-where-new-repositories-are-stored)
   so that the new storages receives all new projects. This stops new projects from being created
   on existing storages while the migration is in progress.
1. Schedule repository moves for:
   - [Projects](#bulk-schedule-project-moves).
   - [Snippets](#bulk-schedule-snippet-moves).
   - [Groups](#bulk-schedule-group-moves). **(PREMIUM SELF)**

### Bulk schedule project moves

Use the API to schedule project moves:

1. [Schedule repository storage moves for all projects on a storage shard](../../api/project_repository_storage_moves.md#schedule-repository-storage-moves-for-all-projects-on-a-storage-shard)
   using the API. For example:

   ```shell
   curl --request POST --header "Private-Token: <your_access_token>" \
        --header "Content-Type: application/json" \
        --data '{"source_storage_name":"<original_storage_name>","destination_storage_name":"<cluster_storage_name>"}' \
        "https://gitlab.example.com/api/v4/project_repository_storage_moves"
   ```

1. [Query the most recent repository moves](../../api/project_repository_storage_moves.md#retrieve-all-project-repository-storage-moves)
   using the API. The response indicates either:
   - The moves have completed successfully. The `state` field is `finished`.
   - The moves are in progress. Re-query the repository move until it completes successfully.
   - The moves have failed. Most failures are temporary and are solved by rescheduling the move.

1. After the moves are complete, use the API to [query projects](../../api/projects.md#list-all-projects) and confirm that all projects have moved. None of the projects should be returned with the
   `repository_storage` field set to the old storage. For example:

   ```shell
   curl --header "Private-Token: <your_access_token>" --header "Content-Type: application/json" \
   "https://gitlab.example.com/api/v4/projects?repository_storage=<original_storage_name>"
   ```

   Alternatively use [the rails console](../operations/rails_console.md) to confirm that all
   projects have moved. Run the following in the rails console:

   ```ruby
   ProjectRepository.for_repository_storage('<original_storage_name>')
   ```

1. Repeat for each storage as required.

### Bulk schedule snippet moves

Use the API to schedule snippet moves:

1. [Schedule repository storage moves for all snippets on a storage shard](../../api/snippet_repository_storage_moves.md#schedule-repository-storage-moves-for-all-snippets-on-a-storage-shard). For example:

   ```shell
   curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" \
        --header "Content-Type: application/json" \
        --data '{"source_storage_name":"<original_storage_name>","destination_storage_name":"<cluster_storage_name>"}' \
        "https://gitlab.example.com/api/v4/snippet_repository_storage_moves"
   ```

1. [Query the most recent repository moves](../../api/snippet_repository_storage_moves.md#retrieve-all-snippet-repository-storage-moves)
The response indicates either:
   - The moves have completed successfully. The `state` field is `finished`.
   - The moves are in progress. Re-query the repository move until it completes successfully.
   - The moves have failed. Most failures are temporary and are solved by rescheduling the move.

1. After the moves are complete, use [the rails console](../operations/rails_console.md) to confirm
   that all snippets have moved. No snippets should be returned for the original storage. Run the
   following in the rails console:

   ```ruby
   SnippetRepository.for_repository_storage('<original_storage_name>')
   ```

1. Repeat for each storage as required.

### Bulk schedule group moves **(PREMIUM SELF)**

Use the API to schedule group moves:

1. [Schedule repository storage moves for all groups on a storage shard](../../api/group_repository_storage_moves.md#schedule-repository-storage-moves-for-all-groups-on-a-storage-shard)
. For example:

    ```shell
    curl --request POST --header "PRIVATE-TOKEN: <your_access_token>" \
         --header "Content-Type: application/json" \
         --data '{"source_storage_name":"<original_storage_name>","destination_storage_name":"<cluster_storage_name>"}' \
         "https://gitlab.example.com/api/v4/group_repository_storage_moves"
    ```

1. [Query the most recent repository moves](../../api/group_repository_storage_moves.md#retrieve-all-group-repository-storage-moves)
. The response indicates either:
   - The moves have completed successfully. The `state` field is `finished`.
   - The moves are in progress. Re-query the repository move until it completes successfully.
   - The moves have failed. Most failures are temporary and are solved by rescheduling the move.

1. After the moves are complete, use [the rails console](../operations/rails_console.md) to confirm
   that all groups have moved. No groups should be returned for the original storage. Run the
   following in the rails console:

   ```ruby
   GroupWikiRepository.for_repository_storage('<original_storage_name>')
   ```

1. Repeat for each storage as required.

## Migrating to another GitLab instance

[Using the API](#moving-data-within-a-gitlab-instance) isn't an option if you are migrating to a new
GitLab environment, for example:

- From a single-node GitLab to a scaled-out architecture.
- From a GitLab instance in your private data center to a cloud provider.

The rest of the document looks
at some of the ways you can copy all your repositories from
`/var/opt/gitlab/git-data/repositories` to `/mnt/gitlab/repositories`.

We look at three scenarios:

- The target directory is empty.
- The target directory contains an outdated copy of the repositories.
- How to deal with thousands of repositories.

WARNING:
Each of the approaches we list can or does overwrite data in the target directory
`/mnt/gitlab/repositories`. Do not mix up the source and the target.

### Recommended approach in all cases

For either Gitaly or Gitaly Cluster targets, the GitLab [backup and restore capability](../../raketasks/backup_restore.md)
should be used. Git repositories are accessed, managed, and stored on GitLab servers by Gitaly as a database. Data loss
can result from directly accessing and copying Gitaly's files using tools like `rsync`.

- From GitLab 13.3, backup performance can be improved by
  [processing multiple repositories concurrently](../../raketasks/backup_gitlab.md#back-up-git-repositories-concurrently).
- Backups can be created of just the repositories using the
  [skip feature](../../raketasks/backup_gitlab.md#excluding-specific-directories-from-the-backup).

No other method works for Gitaly Cluster targets.

### Target directory is empty: use a `tar` pipe

For Gitaly targets (use [recommended approach](#recommended-approach-in-all-cases) for Gitaly Cluster targets), if the
target directory `/mnt/gitlab/repositories` is empty the simplest thing to do is to use a `tar` pipe. This method has
low overhead and `tar` is almost always already installed on your system.

However, it is not possible to resume an interrupted `tar` pipe; if that happens then all data must be copied again.

```shell
sudo -u git sh -c 'tar -C /var/opt/gitlab/git-data/repositories -cf - -- . |\
  tar -C /mnt/gitlab/repositories -xf -'
```

If you want to see progress, replace `-xf` with `-xvf`.

#### `tar` pipe to another server

For Gitaly targets (use [recommended approach](#recommended-approach-in-all-cases) for Gitaly Cluster targets), you can
also use a `tar` pipe to copy data to another server. If your `git` user has SSH access to the new server as
`git@newserver`, you can pipe the data through SSH.

```shell
sudo -u git sh -c 'tar -C /var/opt/gitlab/git-data/repositories -cf - -- . |\
  ssh git@newserver tar -C /mnt/gitlab/repositories -xf -'
```

If you want to compress the data before it goes over the network
(which costs you CPU cycles) you can replace `ssh` with `ssh -C`.

### The target directory contains an outdated copy of the repositories: use `rsync`

WARNING:
Using `rsync` to migrate Git data can cause data loss and repository corruption.
[These instructions are being reviewed](https://gitlab.com/gitlab-org/gitlab/-/issues/270422).

If the target directory already contains a partial or outdated copy of the repositories it may be wasteful to copy all
the data again with `tar`. In this scenario it is better to use `rsync` for Gitaly targets (use
[recommended approach](#recommended-approach-in-all-cases) for Gitaly Cluster targets).

This utility is either already installed on your system, or installable using `apt` or `yum`.

```shell
sudo -u git  sh -c 'rsync -a --delete /var/opt/gitlab/git-data/repositories/. \
  /mnt/gitlab/repositories'
```

The `/.` in the command above is very important, without it you can
get the wrong directory structure in the target directory.
If you want to see progress, replace `-a` with `-av`.

#### Single `rsync` to another server

WARNING:
Using `rsync` to migrate Git data can cause data loss and repository corruption.
[These instructions are being reviewed](https://gitlab.com/gitlab-org/gitlab/-/issues/270422).

For Gitaly targets (use [recommended approach](#recommended-approach-in-all-cases) for Gitaly Cluster targets), if the
`git` user on your source system has SSH access to the target server you can send the repositories over the network with
`rsync`.

```shell
sudo -u git sh -c 'rsync -a --delete /var/opt/gitlab/git-data/repositories/. \
  git@newserver:/mnt/gitlab/repositories'
```

### Thousands of Git repositories: use one `rsync` per repository

WARNING:
Using `rsync` to migrate Git data can cause data loss and repository corruption.
[These instructions are being reviewed](https://gitlab.com/gitlab-org/gitlab/-/issues/270422).

Every time you start an `rsync` job it must:

- Inspect all files in the source directory.
- Inspect all files in the target directory.
- Decide whether or not to copy files.

If the source or target directory has many contents, this startup phase of `rsync` can become a burden for your GitLab
server. You can reduce the workload of `rsync` by dividing its work into smaller pieces, and sync one repository at a
time.

In addition to `rsync` we use [GNU Parallel](https://www.gnu.org/software/parallel/).
This utility is not included in GitLab, so you must install it yourself with `apt`
or `yum`.

This process:

- Doesn't clean up repositories at the target location that no longer exist at the source.
- Only works for Gitaly targets. Use [recommended approach](#recommended-approach-in-all-cases) for Gitaly Cluster targets.

#### Parallel `rsync` for all repositories known to GitLab

WARNING:
Using `rsync` to migrate Git data can cause data loss and repository corruption.
[These instructions are being reviewed](https://gitlab.com/gitlab-org/gitlab/-/issues/270422).

This syncs repositories with 10 `rsync` processes at a time. We keep
track of progress so that the transfer can be restarted if necessary.

First we create a new directory, owned by `git`, to hold transfer
logs. We assume the directory is empty before we start the transfer
procedure, and that we are the only ones writing files in it.

```shell
# Omnibus
sudo mkdir /var/opt/gitlab/transfer-logs
sudo chown git:git /var/opt/gitlab/transfer-logs

# Source
sudo -u git -H mkdir /home/git/transfer-logs
```

We seed the process with a list of the directories we want to copy.

```shell
# Omnibus
sudo -u git sh -c 'gitlab-rake gitlab:list_repos > /var/opt/gitlab/transfer-logs/all-repos-$(date +%s).txt'

# Source
cd /home/git/gitlab
sudo -u git -H sh -c 'bundle exec rake gitlab:list_repos > /home/git/transfer-logs/all-repos-$(date +%s).txt'
```

Now we can start the transfer. The command below is idempotent, and
the number of jobs done by GNU Parallel should converge to zero. If it
does not, some repositories listed in `all-repos-1234.txt` may have been
deleted/renamed before they could be copied.

```shell
# Omnibus
sudo -u git sh -c '
cat /var/opt/gitlab/transfer-logs/* | sort | uniq -u |\
  /usr/bin/env JOBS=10 \
  /opt/gitlab/embedded/service/gitlab-rails/bin/parallel-rsync-repos \
    /var/opt/gitlab/transfer-logs/success-$(date +%s).log \
    /var/opt/gitlab/git-data/repositories \
    /mnt/gitlab/repositories
'

# Source
cd /home/git/gitlab
sudo -u git -H sh -c '
cat /home/git/transfer-logs/* | sort | uniq -u |\
  /usr/bin/env JOBS=10 \
  bin/parallel-rsync-repos \
    /home/git/transfer-logs/success-$(date +%s).log \
    /home/git/repositories \
    /mnt/gitlab/repositories
`
```

#### Parallel `rsync` only for repositories with recent activity

WARNING:
Using `rsync` to migrate Git data can cause data loss and repository corruption.
[These instructions are being reviewed](https://gitlab.com/gitlab-org/gitlab/-/issues/270422).

Suppose you have already done one sync that started after 2015-10-1 12:00 UTC.
Then you might only want to sync repositories that were changed by using GitLab
after that time. You can use the `SINCE` variable to tell `rake
gitlab:list_repos` to only print repositories with recent activity.

```shell
# Omnibus
sudo gitlab-rake gitlab:list_repos SINCE='2015-10-1 12:00 UTC' |\
  sudo -u git \
  /usr/bin/env JOBS=10 \
  /opt/gitlab/embedded/service/gitlab-rails/bin/parallel-rsync-repos \
    success-$(date +%s).log \
    /var/opt/gitlab/git-data/repositories \
    /mnt/gitlab/repositories

# Source
cd /home/git/gitlab
sudo -u git -H bundle exec rake gitlab:list_repos SINCE='2015-10-1 12:00 UTC' |\
  sudo -u git -H \
  /usr/bin/env JOBS=10 \
  bin/parallel-rsync-repos \
    success-$(date +%s).log \
    /home/git/repositories \
    /mnt/gitlab/repositories
```