From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id 29F55138247 for ; Sat, 18 Jan 2014 10:37:51 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id CCB52E0C70; Sat, 18 Jan 2014 10:37:45 +0000 (UTC) Received: from mail-ea0-f169.google.com (mail-ea0-f169.google.com [209.85.215.169]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 9DD8AE0C33 for ; Sat, 18 Jan 2014 10:37:44 +0000 (UTC) Received: by mail-ea0-f169.google.com with SMTP id l9so1892830eaj.0 for ; Sat, 18 Jan 2014 02:37:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:subject:references :in-reply-to:content-type:content-transfer-encoding; bh=VBy2V+A/lNS81rAwrQ+g5r1bv7gFskGunkvz8+lFuzs=; b=0ny8sWTw+HCmA3kFSYmO3RBPvg69EEcxoeFkOpmj/1KqUj5hc/g4rFpCIofkBdMmE4 DqoWYPTsX404T72vsz5x1RDmLOwZjYTP/6wPe+5dOygXVzZzDh3O6PQZiD6rRpk5qTzb AEbtZAaQhfJHUqHA+lVGbnZCJWQMMGnM5MyBJXLfwyRc4y6WLOnOl8N43bVsufC1e4Zn YqvNgkdl955vN4yi++isD/PXHiuUY1xS8Y7nXSQnkQbUR79hbUCB8Mxv6mF2iQ6pSgSm 1LTy3qDWAY+dOyTYAk8rjIakmk8iYJwCmY3KaDpKV3XnLo+5VViSOADpRUKrsHJ5BCPc WemA== X-Received: by 10.14.95.194 with SMTP id p42mr1026766eef.88.1390041463396; Sat, 18 Jan 2014 02:37:43 -0800 (PST) Received: from [172.20.0.41] (196-210-126-57.dynamic.isadsl.co.za. [196.210.126.57]) by mx.google.com with ESMTPSA id o47sm34155322eem.21.2014.01.18.02.37.42 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sat, 18 Jan 2014 02:37:42 -0800 (PST) Message-ID: <52DA5974.40905@gmail.com> Date: Sat, 18 Jan 2014 12:37:40 +0200 From: Alan McKinnon User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@lists.gentoo.org Reply-to: gentoo-dev@lists.gentoo.org MIME-Version: 1.0 To: gentoo-dev@lists.gentoo.org Subject: Re: [gentoo-dev] overlays.gentoo.org restoration & post-mortem References: <20140118050256.GF3378@orbis-terrarum.net> <52DA278E.2010703@gentoo.org> <52DA28D0.4090900@gmail.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Archives-Salt: e5f2fcf6-f91c-419c-9dcb-5dc3c2d824f2 X-Archives-Hash: 2eca31ad5fa873ce55ee9d34010ee3f6 On 18/01/2014 09:49, Alec Warner wrote: > On Fri, Jan 17, 2014 at 11:10 PM, Alan McKinnon > wrote: > > On 18/01/2014 09:04, Patrick Lauer wrote: > >> which could link to the > >> > infra page would be good here perhaps, so when an outage > occurred ( at > >> > least on the web side ) appropriate links to infra could be given. > > The more sane fix would be low DNS TTL and rotating DNS to a different > > IP if things are down. > > > > > > > That is already in place: > > $ dig overlays.gentoo.org > > ; <<>> DiG 9.9.4 <<>> overlays.gentoo.org > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49989 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1 > > ;; OPT PSEUDOSECTION: > ; EDNS: version: 0, flags:; udp: 4000 > ;; QUESTION SECTION: > ;overlays.gentoo.org . IN A > > ;; ANSWER SECTION: > overlays.gentoo.org . 600 IN > CNAME spoonbill.gentoo.org . > spoonbill.gentoo.org . 604800 IN > A 81.93.255.5 > > > > 5 minutes downtime max if a switch needs to be done. > 5 minutes is perfectly acceptable IMHO > > > infra TTL standards are 60 minutes for service CNAMEs and 30 minutes for > HA CNAMES. The TTL is 600 here (which is 10 minutes, not 5) because I > lowered it on 1/14 in anticipation of a machine failover, it was > previously 2 hours. Thanks for the clarification. Obviously I ran dig after you'd made the change. 60 mins is still acceptable for a CNAME IMHO. Wait one hour max to be able to sync in event of a change is not at all unreasonable. -- Alan McKinnon alan.mckinnon@gmail.com