Can't log to rsyslog with facility "kern" using logger command.

Issue

• How can I write or generate a message with the kern facility via rsyslog ?
• Is it possible to write a message with kern facility to some file using the logger command?
• When I run the command logger -p kern.info test, the log message is written to file with the user facility instead of the defined kern facility.Further more, the message is saved to the /var/log/messages file, instead of to the /var/log/kern.log file. As you can see with this one-liner, the message is saved to disk with the user facility, and to the messages file, while the kern.log is not updated.

[root@server ~]# date && logger -p kern.info "Now is: $(date)" && tail -1 messages && tail -1 kern.log
Mon Jan 25 18:38:24 CET 2016
Jan 25 18:38:24 <user.info> boom eu2246: Now is: Mon Jan 25 18:38:24 CET 2016
Jan 25 18:20:01 <kern.debug> boom kernel: SELinux: initialized (dev tmpfs, type tmpfs), uses transition SIDs

To send messages with the kern facility to a separate log file, we use this configuration: kern.* /var/log/kern.log.