Cloning the Ceph Source Code Repository

You may clone a Ceph branch of the Ceph source code by going to github Ceph Repository, selecting a branch (main by default), and clicking the Download ZIP button.

To clone the entire git repository, install and configure git.

Install Git

To install git on Debian/Ubuntu, execute:

sudo apt-get install git

To install git on CentOS/RHEL, execute:

sudo yum install git

You must also have a github account. If you do not have a github account, go to and register. Follow the directions for setting up git at Set Up Git.

Add SSH Keys (Optional)

If you intend to commit code to Ceph or to clone using SSH (, you must generate SSH keys for github.


If you only intend to clone the repository, you may use git clone --recursive without generating SSH keys.

To generate SSH keys for github, execute:


Get the key to add to your github account (the following example assumes you used the default file path):

cat .ssh/

Copy the public key.

Go to your github account, click on “Account Settings” (i.e., the ‘tools’ icon); then, click “SSH Keys” on the left side navbar.

Click “Add SSH key” in the “SSH Keys” list, enter a name for the key, paste the key you generated, and press the “Add key” button.

Clone the Source

To clone the Ceph source code repository, execute:

git clone --recursive

Once git clone executes, you should have a full copy of the Ceph repository.


Make sure you maintain the latest copies of the submodules included in the repository. Running git status will tell you if the submodules are out of date.

cd ceph
git status

Updating Submodules

  1. Determine whether your submodules are out of date:

    git status
    1. If your submodules are up to date

      If your submodules are up to date, the following console output will appear:

      On branch main
      Your branch is up to date with 'origin/main'.
      nothing to commit, working tree clean

      If you see this console output, then your submodules are up to date. You do not need this procedure.

    2. If your submodules are not up to date

      If your submodules are not up to date, you will see a message that includes a list of “untracked files”. The example here shows such a list, which was generated from a real situation in which the submodules were no longer current. Your list of files will not be the same as this list of files, but this list is provided as an example. If in your case any untracked files are listed, then you should continue to the next step of this procedure.

      On branch main
      Your branch is up to date with 'origin/main'.
      Untracked files:
        (use "git add <file>..." to include in what will be committed)
      nothing added to commit but untracked files present (use "git add" to track)
  2. If your submodules are out of date, run the following commands:

    git submodule update --force --init --recursive
    git clean -fdx
    git submodule foreach clean -fdx
  3. Run git status again:

    git status

    Your submodules are up to date if you see the following message:

    On branch main
    Your branch is up to date with 'origin/main'.
    nothing to commit, working tree clean

Choose a Branch

Once you clone the source code and submodules, your Ceph repository will be on the main branch by default, which is the unstable development branch. You may choose other branches too.

  • main: The unstable development branch.

  • stable-release-name: The name of the stable, Active Releases. e.g. Pacific

  • next: The release candidate branch.

git checkout main