解决方法
这就是我在rsyslog.conf中配置它的方式:
# Log remote hosts to separate log file $template PerHostLog,"/var/log/remote-hosts/%HOSTNAME%.log" $template RemoteHostFileFormat,"%TIMESTAMP% %HOSTNAME% %syslogfacility-text% %syslogtag%%msg:::sp-if-no-1st-sp%%msg:::space-cc,drop-last-lf%\n" :inputname,isequal,"imudp" ?PerHostLog;RemoteHostFileFormat & ~