fzzf: You will need to create a secret [1,2] with login information for your logserver. This is both required by the add-fileserver role [3] and a best practice, since the login information will need to contain a private SSH key. To know the format of this secret, take a look at the site_sflogs secret, automatically generated by Software Factory to upload logs for its internal tenant (local): https://softwarefactory-project.io/cgit/software-factory/sf-config/plain/ansible/roles/sf-repos/templates/config/zuul.d/_secret_sflogs.yaml.j2. Here is the relevant documentation for encrypting secrets with zuul-client: https://zuul-ci.org/docs/zuul-client/commands.html#encrypt.

[1] https://zuul-ci.org/docs/zuul/latest/config/secret.html#secret
[2] https://zuul-ci.org/docs/zuul/latest/project-config.html#encryption
[3] https://zuul-ci.org/docs/zuul-jobs/log-roles.html#rolevar-add-fileserver.fileserver