I tried following configs, but it seems not working..
sync {
default.rsync,
source = "/usr/local/apache2/htdocs/",
target = "rsync://10.0.1.1:/data1/",
exclude = "..",
delete = false,
delay = 1,
rsync = {
_extra = { "--password-file=/home/push/.rsyncd_secret" }
}
}