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Services VM deployment is using direct ssh commands to reach the VM. In order to know the ssh keys configuration, please take a look into the steps below:

Generate ssh-key in VM

This command will generate a new ssh-key.

$ ssh-keygen
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/

Add private key to CI/CD variable

we have defined a variable PROD_03_PRIVATE_KEY in our Gitlab invenio group variable. And we are adding the generated private key /root/.ssh/id_rsa to PROD_03_PRIVATE_KEY.


The authorized_keys file in SSH specifies the SSH keys that can be used for logging into the user account for which the file is configured.

Add public key to authorized_keys:

$ cat  /root/.ssh/ >> /.ssh/authorized_keys


group runner Gitlab-Runner-03-Produktion-Invenio-Shell has a known_hosts that contains a list of public keys for all the hosts which the user has connected to.

These list of public keys are in CI/CD variable SSH_SERVER_HOSTKEYS.

To add new host:

$ ssh-keyscan

And then update the variable SSH_SERVER_HOSTKEYS.