a3f09700e5
Automatic merge from submit-queue add logrotate service and configuration for GCI This change mirrors the configuration in cluster/saltbase/salt/logrotate for GCI. On GCI we use systemd timers (https://www.freedesktop.org/software/systemd/man/systemd.timer.html) and install an hourly timer - kube-logrotate.timer. This will invoke kube-logrotate.service (which calls /usr/sbin/logrotate) once every hour to perform log rotation as per the rotation rules installed under /etc/logrotate.d/. @kubernetes/goog-image @zmerlynn @dchen1107 @andyzheng0831