Build of images using SUSE Manager Server fails with rsync error

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Environment

SUSE Manager 4.3 Server

Situation

Building images using SUSE Manager Server and the Build Host fails. The following error messages can be in found in the /var/log/rhn_web_ui.log file:

Warning: Permanently added 'some.hostname,some.ip.address' (ECDSA) to the list of known hosts.
Permission denied, please try again.
Received disconnect from some.ip.address port 22:2: Too many authentication failures
Disconnected from some.ip.address port 22
rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]
rsync error: unexplained error (code 255) at io.c(228) [Receiver=3.2.3]

Also, in /var/log/messages on the SUSE Manager Build Host system sshd reports errors:

2024-01-15T09:23:12.487300+01:00 hostname sshd[14910]: error: PAM: Authentication failure for root from some.ip.address
2024-01-15T09:23:12.488106+01:00 hostname sshd[14910]: Failed none for root from some.ip.address port 57036 ssh2
2024-01-15T09:23:12.495355+01:00 hostname sshd[14910]: Failed password for root from some.ip.address port 57036 ssh2
2024-01-15T09:23:12.502182+01:00 hostname sshd[14910]: error: maximum authentication attempts exceeded for root from some.ip.address port 57036 ssh2 [preauth]
2024-01-15T09:23:12.502261+01:00 hostname sshd[14910]: Disconnecting authenticating user root some.ip.address port 57036: Too many authentication failures [preauth]

Resolution

Apply the highstate from the SUSE Manager Server against the Build Host system.

Cause

On the Build Host system, the /root/.ssh/authorized_keys file is missing the public key from the SUSE Manager server (/srv/susemanager/salt/salt_ssh/mgr_ssh_id.pub) which is causing rsync over ssh to fail.

Disclaimer

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