To list available logs before tailing, run the following command:

mgrctl exec -ti -- ls /var/log/rhn/reposync/

At the command prompt on the SUSE Manager container host, as root, check the synchronization of a channel log file:

mgrctl exec -ti -- tail -f /var/log/rhn/reposync/<channel-label>.log

Each child channel generates its own log during the synchronization progress. You need to check all the base and child channel log files to be sure that the synchronization is complete.