how to troubleshoot services startup on reboot

[Sergei G]

I have service startup failure probably due to DNS resolution.  I think
that local unbind is not available during some services startup.  For
example, nginx reports failure to resolve network names and fails to start.

However, there is little I can obtain about service startup order from
logs, because there is no entry like "starting local unbind" in
/var/log/messages.

Is there a way to increase verbosity?  Other ways to help with
troubleshooting?

Through google I found that someone else had the same issue on FreeBSD with
the same complication of little log level feedback.