[docs] add notes on running chronyd in local reference mode

When running a Kudu cluster in an isolated network, use a dedicated
server to run the reference chronyd in local reference mode [1].
Avoid placing kudu-master and kudu-tserver on such a server.

[1] https://chrony.tuxfamily.org/doc/3.4/chrony.conf.html#local

Change-Id: Ie346ed02f1faa52bce1c919cf89584d2cb398c7b
Reviewed-on: http://gerrit.cloudera.org:8080/18344
Tested-by: Kudu Jenkins
Reviewed-by: Andrew Wong <awong@cloudera.com>
1 file changed