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Re: Init : someone could comment this ?



Les Mikesell wrote:
Lennart Poettering wrote:

Then, the reason I hacked this up was mostly to fix stuff like sudo
and apache, which do a lookup+reverse lookup on initialization, which
fails completely if DNS doesn't work (as in "*immediately* fail") and
the entry is not available in /etc/hosts. DNS lookups that time out
are a different problem.

 And it still fails in the same way, when there is no network (Ie.
daemon can bind to a specific IP that is the "wrong" one).

Hmm?

Are you suggesting that there are daemons that bind on addresses by
resolving host names? Who's doing something like that? Either daemons
should bind on 0.0.0.0 or bind to manually configured IP
adresses. Everything else is broken anyway.

There are a lot of things that can't work and will do horribly wrong things if started without a working DNS - and for reasons not related to your own hostname. Such daemons would be better off if they could defer startup until after DNS works.

But shouldn't these things be fixed directly by identifying what goes wrong and when, and filing bugs against them upstream so that when DNS misbehaves the daemons handle it appropriately. It should never be a 'working as intended' behavior for a daemon to do things wrong just because DNS was unavailable... the daemon should postpone its operation until it can try to resolve the hostname again later, and keep doing exactly that until it works.

In my view the init scripts should not have to handle that situation, but rather the daemon itself should. Defering the startup is a hack. Maybe its necessary and maybe its not, but it seems like a poor design either way.

--
Andrew Farris <lordmorgul gmail com> <ajfarris gmail com>
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No one now has, and no one will ever again get, the big picture. - Daniel Geer
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