Git Generate Ssh Key Gitlab

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GitLab currently doesn't have built-in support for managing SSH keys in a buildenvironment (where the GitLab Runner runs).

I have two Gitlab accounts. On my old account I added an ssh-key that is located in /.ssh/idrsa.pub on my computer. Now I want to add another ssh-key for my new Gitlab account. How do I do this. The.pub file is your public key, and the other file is the corresponding private key. If you don’t have these files (or you don’t even have a.ssh directory), you can create them by running a program called ssh-keygen, which is provided with the SSH package on Linux/macOS systems and comes with Git for Windows.

The SSH keys can be useful when:

  • GitLab CE Mirror Please open new issues in our issue tracker on GitLab.com - gitlabhq/gitlabhq. Skip to content. Features → Code review. In this repository All GitHub ↵ Jump.
  • Jun 28, 2017 I have followed gitlab document to generate ssh keys and added my public key into my gitlab profile and later on when I tried to clone or pull etc using ssh it is asking me for password. I have followed everything correctly. But still I am seeing the same issue. I am a gitlab admin we so many users and projects under gitlab.
  • Before generating ssh keygen, you need to have Git installed in your system. Creating SSH Key. Step 1 − To create SSH key, open the command prompt and enter the command as shown below − C: −ssh-keygen It will prompt for 'Enter file in which to save the key (//.ssh/idrsa):', just type file name and press enter.
  1. You want to checkout internal submodules
  2. You want to download private packages using your package manager (e.g., Bundler)
  3. You want to deploy your application to your own server, or, for example, Heroku
  4. You want to execute SSH commands from the build environment to a remote server
  5. You want to rsync files from the build environment to a remote server

If anything of the above rings a bell, then you most likely need an SSH key.

The most widely supported method is to inject an SSH key into your buildenvironment by extending your .gitlab-ci.yml, and it's a solution which workswith any type of executor(Docker, shell, etc.).

How it works

  1. Create a new SSH key pair locally with ssh-keygen
  2. Add the private key as a variable toyour project
  3. Run the ssh-agent during job to loadthe private key.
  4. Copy the public key to the servers you want to have access to (usually in~/.ssh/authorized_keys) or add it as a deploy keyif you are accessing a private GitLab repository.

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NOTE: Note:The private key will not be displayed in the job log, unless you enabledebug logging. You might also want tocheck the visibility of your pipelines.

SSH keys when using the Docker executor

When your CI/CD jobs run inside Docker containers (meaning the environment iscontained) and you want to deploy your code in a private server, you need a wayto access it. This is where an SSH key pair comes in handy.

  1. You will first need to create an SSH key pair. For more information, followthe instructions to generate an SSH key.Do not add a passphrase to the SSH key, or the before_script willprompt for it.

  2. Create a new variable.As Key enter the name SSH_PRIVATE_KEY and in the Value field pastethe content of your private key that you created earlier.

  3. Modify your .gitlab-ci.yml with a before_script action. In the followingexample, a Debian based image is assumed. Edit to your needs:

    NOTE: Note:The before_script can be set globallyor per-job.

  4. Make sure the private server's SSH host keys are verified.

  5. As a final step, add the public key from the one you created in the firststep to the services that you want to have an access to from within the buildenvironment. If you are accessing a private GitLab repository you need to addit as a deploy key.

That's it! You can now have access to private servers or repositories in yourbuild environment.

SSH keys when using the Shell executor

If you are using the Shell executor and not Docker, it is easier to set up anSSH key.

You can generate the SSH key from the machine that GitLab Runner is installedon, and use that key for all projects that are run on this machine.

  1. /thomson-default-key-generator-rar.html. First, log in to the server that runs your jobs.

  2. Then, from the terminal, log in as the gitlab-runner user: 3ds parental controls master key generator.

  3. Generate the SSH key pair as described in the instructions togenerate an SSH key.Do not add a passphrase to the SSH key, or the before_script willprompt for it.

  4. As a final step, add the public key from the one you created earlier to theservices that you want to have an access to from within the build environment.If you are accessing a private GitLab repository you need to add it as adeploy key.

Once done, try to log in to the remote server in order to accept the fingerprint:

For accessing repositories on GitLab.com, you would use git@gitlab.com.

Verifying the SSH host keys

It is a good practice to check the private server's own public key to make sureyou are not being targeted by a man-in-the-middle attack. In case anythingsuspicious happens, you will notice it since the job would fail (the SSHconnection would fail if the public keys would not match).

To find out the host keys of your server, run the ssh-keyscan command from atrusted network (ideally, from the private server itself):

Create a new variable withSSH_KNOWN_HOSTS as 'Key', and as a 'Value' add the output of ssh-keyscan.

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NOTE: Note:If you need to connect to multiple servers, all the server host keysneed to be collected in the Value of the variable, one key per line.

TIP: Tip:By using a variable instead of ssh-keyscan directly inside.gitlab-ci.yml, it has the benefit that you don't have to change .gitlab-ci.ymlif the host domain name changes for some reason. Also, the values are predefinedby you, meaning that if the host keys suddenly change, the CI/CD job will fail,and you'll know there's something wrong with the server or the network.

Now that the SSH_KNOWN_HOSTS variable is created, in addition to thecontent of .gitlab-ci.ymlabove, here's what more you need to add:

Example project

We have set up an Example SSH Project for your conveniencethat runs on GitLab.com using our publicly availableshared runners.

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Want to hack on it? Simply fork it, commit and push your changes. Within a fewmoments the changes will be picked by a public runner and the job will begin.