[pve-devel] [PATCH proxmox-acme 1/1] Close the acme standalone connection after sending a response

[Daniel Berteaud]

----- Le 1 Oct 20, à 11:15, Fabian Grünbichler f.gruenbichler at proxmox.com a écrit :

> On September 30, 2020 4:09 pm, Daniel Berteaud wrote:
>> Without this, the first req get a response, but not the next ones as the
>> listeners stays busy
>> Fixes #3048
>> 
>> Signed-off-by: Daniel Berteaud <daniel at firewall-services.com>
>> ---
>>  src/PVE/ACME/StandAlone.pm | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/src/PVE/ACME/StandAlone.pm b/src/PVE/ACME/StandAlone.pm
>> index 0e2ece6..552c35c 100644
>> --- a/src/PVE/ACME/StandAlone.pm
>> +++ b/src/PVE/ACME/StandAlone.pm
>> @@ -55,8 +55,8 @@ sub setup {
>>  		} else {
>>  		    $c->send_error(404, 'Not found.')
>>  		}
>> +		$c->close();
> 
> I think this is not right - we only end up looping/blocking on
> get_request if the client requested keep alive, in which case the server
> should obviously not close the connection..
> 
> I guess we have to fork (up to some limit) on accept()? it's obviously
> not ideal that anybody can race with the LE validation attempts and
> block the single request handler ;)

Indeed, having a few more handlers could limit the risk of this happening.

> 
> maybe you can change something in your apache config to close the
> connection (or rather, to propagate the connection closing from the
> actual client)? it looks like this can only affect you if
> - your apache proxy keeps the connection open
> - your apache proxy does not re-use the open connection

You're right, the issue was on my rev proxy, which didn't re-used keep-alived connexions as it should (it was an old httpd 2.2.3 on a CentOS 5 box, on which I had no control).
Switching my setup so it now runs behind a nginx proxypass works normaly without any modification

Sorry for not having looked at this more closely before posting ;-)

Cheers,
Daniel



-- 
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Daniel Berteaud 
FIREWALL-SERVICES SAS, La sécurité des réseaux 
Société de Services en Logiciels Libres 
Tél : +33.5 56 64 15 32 
Matrix: @dani:fws.fr 
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