Mailing-List: contact user-help@couchdb.apache.org; run by ezmlm
Precedence: bulk
Reply-To: user@couchdb.apache.org
Received-SPF: neutral (athena.apache.org: local policy)
From: Mike Keen <mk@visiture.com>
To: "user@couchdb.apache.org" <user@couchdb.apache.org>
Date: Mon, 21 Jun 2010 13:33:50 -0400
Subject: Re: Crash: Ip or Hostname as bind_address
Thread-Topic: Crash: Ip or Hostname as bind_address
Thread-Index: AcsRZ+pu7167hCEeRjS02Q5QlRqtFQ==
Message-ID: <138ECE0A-782D-45F8-97B7-EC81D057CB94@visiture.com>
References: 
 <34B5B1737ACC7D4490AD9E0E799F0E6C01B5A4D06B@LNWEXMBX0137.msad.ms.com>
 <50FB16B6-A62C-482F-BC71-810FBFEE0CE0@googlemail.com>
 <424B1503-23D8-4CE2-A2F1-5B94BF4569F2@tumbolia.org>
 <A9DC438D6CAFFF4BBB2995814444088101180211D770@VS-EX-01.intra.vpro.nl>
 <AANLkTintD8HWBO9Xi7CoO7-zxxHhm0U1BRC4RhyhTDeI@mail.gmail.com>
 <3BA19220-870D-4F70-A60C-A3922D137F47@tumbolia.org>
In-Reply-To: <3BA19220-870D-4F70-A60C-A3922D137F47@tumbolia.org>
Accept-Language: en-US
Content-Language: en-US
acceptlanguage: en-US
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0

Correct me if I'm wrong, but I believe CouchDB does in fact have a vhosts f=
eature.

Mike

On Jun 21, 2010, at 1:28 PM, Noah Slater wrote:

>=20
> On 21 Jun 2010, at 18:15, Andrew Melo wrote:
>=20
>> On Mon, Jun 21, 2010 at 6:10 PM, Nils Breunese <N.Breunese@vpro.nl> wrot=
e:
>>=20
>>> It might be pretty confusing if the A record changed after the last tim=
e
>>> the server was started. I've never seen a daemon allowing you to bind t=
o a
>>> hostname. Also, what happens when your resolver is down? CouchDB can't
>>> start?
>>>=20
>>> But yeah, it could be implemented I guess.
>>>=20
>>=20
>> For the machines I run, I set up different hostnames in /etc/hosts for t=
he
>> external and internal interface, so if I have to move it (for whatever
>> arcane reason), I can make one change and have all the binded addresses
>> change as well. (I use DNS to change the A records so that external clie=
nts
>> can find it, but that's a different problem)
>=20
> Agreed, I regularly use /etc/hosts to manage internal IP spaces. I could =
use BIND if I felt like a bit of flagellation. Either way, it's certainly s=
omething I can see a use for. If your DNS resolution fails, then CouchDB er=
rors out, like it would if it didn't have permission to open a port.
>=20
> However, from:
>=20
> 	http://httpd.apache.org/docs/2.0/dns-caveats.html
>=20
> We have:
>=20
>> This page could be summarized with the statement: don't configure Apache=
 in such a way that it relies on DNS resolution for parsing of the configur=
ation files. If Apache requires DNS resolution to parse the configuration f=
iles then your server may be subject to reliability problems (ie. it might =
not boot), or denial and theft of service attacks (including users able to =
steal hits from other users).
>=20
> Apache httpd is intended to be deployed in shared environments, however. =
CouchDB doesn't have a vhost feature, and I can't imagine it providing one.=
 We'd almost certainly just tell users to proxy back from an Apache vhost t=
o a specific database, or what have you. So may be these concerns don't app=
ly.