SSH Keys

SSH keys are used to establish a secure connection between your computer and Clever Cloud.
You need to add a SSH key to your Clever Cloud's account to deploy via Git.
A user can have multiple SSH keys.

Warning:

A SSH key can be used with only one account. A SSH key is used to identify the actions made by a user and must be associated with only one account.
If a key is used by more than one account, a warning will be displayed in the console.

How to add your SSH key on Clever Cloud?

Github account and SSH key on Clever Cloud

If your account is linked to GitHub, a panel with your GitHub SSH keys will appear in the "SSH Keys" tab. You can add any key already present in your GitHub account by clicking on the import button next to it.

Find your SSH key

You may already have an SSH key and so do not need to generate a new one. To check if you have one, follow the steps:

Linux and Mac

  1. Wether you use Mac or Linux, open your Terminal application.
  2. Run cd ~/.ssh/ in your Terminal.
  3. If the folder exists, run ls and check if a pair of key exists : id_ed25519 and id_ed25519.pub. Using id_rsa and id_rsa.pub is fine too. We are just advocating the use of ed25519. Smaller to copy and way stronger than 2048-bit RSA keys. If you can find them, you do not need to generate a new one, simply go to the following "Add your key on Clever Cloud" part!


Windows

  1. If you don't have it, download Git for Windows and install it.
  2. Run Git Bash (from the Start Menu or from the Explorer with the contextual menu (right click)).
  3. Run cd ~/.ssh/ in your Terminal.
  4. If the folder exists, run ls and check if a pair of key exists : id_ed25519 and id_ed25519.pub. Using id_rsa and id_rsa.pub is fine too. We just advocate using ed25519. Smaller to copy and way stronger than 2048-bit RSA keys. If you can find them, you do not need to generate a new one, simply go to the following "Add you key on Clever Cloud" part!

Create your SSH key

If you read the previous section, you should have a Terminal open.

  1. In your Terminal, enter the following bash line:

    ssh-keygen -t ed25519 -C "your_email@youremail.com"

    This command creates a new ssh key using the provided email, so that the owner of the key can be identified.

  2. When asked, enter a passphrase:

    Generating public/private ed25519 key pair.
    Enter file in which to save the key (/your_home_path/.ssh/id_ed25519):
    # Now you should enter a passphrase.
    Enter passphrase (empty for no passphrase): [Type a passphrase]
    Enter same passphrase again: [Type passphrase again]

    Which should give you something like this:

    Your identification has been saved in /your_home_path/.ssh/id_ed25519.
    Your public key has been saved in /your_home_path/.ssh/id_ed25519.pub.
    The key fingerprint is:
    01:0e:e5:2d:ab:98:d6:17:a1:6d:f0:68:9f:d0:a2:db your_email@youremail.com

Add your SSH key on Clever Cloud

Public SSH Key

To declare your public SSH Key on Clever Cloud, in the left navigation bar, go in "Profile" and in the "SSH Keys" tab.

Add the key by entering a name and the public SSH key. The key is the entire contents of the id_ed25519.pub file.

Remember

Your public SSH key must be associated with only one account.

If you see "access denied" or "password:" when you push on Clever Cloud, your SSH Keys may be invalid or not available on Clever Cloud. Please check that you SSH Key is present and valid in your profile.

Private SSH Key

If you want to clone a repository from a private repository, you can add a Private SSH Key.

Need help about SSH keys?
Contact us at support@clever-cloud.com or you can read more about SSH Keys.

Check your ssh configuration

To check if your ssh key is correctly configured, you can try to run:

    ssh git@push.clever-cloud.com

The first time, you may have to type "yes" to continue.

If you see "Permission denied (publickey).", please read below.

Configure your SSH agent

git@push-par-clevercloud-customers.services.clever-cloud.com: Permission denied (publickey).

fatal: Could not read from remote repository.

Please make sure you have the correct access rights and the repository exists.

An error can occur when your SSH agent has not be configured to use your SSH key.

Most of the time, it's due to the presence of multiple SSH keys generated by 3rd party software, like Github for Mac.

You can add those lines into your ~/.ssh/config file. It tells your SSH agent which key to pick for a given hostname. Please update your Clever Cloud SSH key path accordingly.

# config for Clever Cloud specific key (Paris zone)
Host ccloud-par
  Hostname push-par-clevercloud-customers.services.clever-cloud.com
  User git
  IdentityFile ~/.ssh/id_ed25519_clevercloud

# config for Clever Cloud specific key (Montreal zone)
Host ccloud-mtl
  Hostname push-mtl-clevercloud-customers.services.clever-cloud.com
  User git
  IdentityFile ~/.ssh/id_ed25519_clevercloud
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