Date: Fri, 1 Jul 2016 17:03:36 +0200 From: Julien Cigar <julien@perdition.city> To: InterNetX - Juergen Gotteswinter <jg@internetx.com> Cc: Joe Love <joe@getsomewhere.net>, freebsd-fs@freebsd.org Subject: Re: HAST + ZFS + NFS + CARP Message-ID: <20160701150336.GC41276@mordor.lan> In-Reply-To: <01b8a61e-739e-c41e-45bc-a84af0a9d8ab@internetx.com> References: <20160701084717.GE5695@mordor.lan> <47c7e1a5-6ae8-689c-9c2d-bb92f659ea43@internetx.com> <20160701101524.GF5695@mordor.lan> <f74627e3-604e-da71-c024-7e4e71ff36cb@internetx.com> <20160701105735.GG5695@mordor.lan> <3d8c7c89-b24e-9810-f3c2-11ec1e15c948@internetx.com> <93E50E6B-8248-43B5-BE94-D94D53050E06@getsomewhere.net> <bbaf14e2-4ec6-545c-ba67-a1084100b05c@internetx.com> <20160701143917.GB41276@mordor.lan> <01b8a61e-739e-c41e-45bc-a84af0a9d8ab@internetx.com>
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[-- Attachment #1 --] On Fri, Jul 01, 2016 at 04:41:59PM +0200, InterNetX - Juergen Gotteswinter wrote: > Am 01.07.2016 um 16:39 schrieb Julien Cigar: > > On Fri, Jul 01, 2016 at 03:44:36PM +0200, InterNetX - Juergen Gotteswinter wrote: > >> > >> > >> Am 01.07.2016 um 15:18 schrieb Joe Love: > >>> > >>>> On Jul 1, 2016, at 6:09 AM, InterNetX - Juergen Gotteswinter <jg@internetx.com> wrote: > >>>> > >>>> Am 01.07.2016 um 12:57 schrieb Julien Cigar: > >>>>> On Fri, Jul 01, 2016 at 12:18:39PM +0200, InterNetX - Juergen Gotteswinter wrote: > >>>>> > >>>>> of course I'll test everything properly :) I don't have the hardware yet > >>>>> so ATM I'm just looking for all the possible "candidates", and I'm > >>>>> aware that a redundant storage is not that easy to implement ... > >>>>> > >>>>> but what solutions do we have? It's either CARP + ZFS + (HAST|iSCSI), > >>>>> either zfs send|ssh zfs receive as you suggest (but it's > >>>>> not realtime), either a distributed FS (which I avoid like the plague..) > >>>> > >>>> zfs send/receive can be nearly realtime. > >>>> > >>>> external jbods with cross cabled sas + commercial cluster solution like > >>>> rsf-1. anything else is a fragile construction which begs for desaster. > >>> > >>> This sounds similar to the CTL-HA code that went in last year, for which I haven’t seen any sort of how-to. The RSF-1 stuff sounds like it has more scaling options, though. Which it probably should, given its commercial operation. > >> > >> rsf is what pacemaker / heartbeat tries to be, judge me for linking > >> whitepapers but in this case its not such evil marketing blah > >> > >> http://www.high-availability.com/wp-content/uploads/2013/01/RSF-1-HA-PLUGIN-ZFS-STORAGE-CLUSTER.pdf > >> > >> > >> @ Julien > >> > >> seems like you take availability really serious, so i guess you also got > >> plans how to accomplish network problems like dead switches, flaky > >> cables and so on. > >> > >> like using multiple network cards in the boxes, cross cabling between > >> the hosts (rs232 and ethernet of course, using proved reliable network > >> switches in a stacked configuration for example cisco 3750 stacked). not > >> to forget redundant power feeds to redundant power supplies. > > > > the only thing that is not redundant (yet?) is our switch, an HP Pro > > Curve 2530-24G) .. it's the next step :) > > Arubas, okay, a quick view in the spec sheet does not seem to list > stacking option. > > what about power? there is a "diesel generator" for the server room, and redundant power supply on "most critical" servers (our PostgreSQL servers for example). Router and Firewall (Soekris 6501) runs CARP / PFSync, same for the load balancer (HAProxy), local Unbound, etc (Everything is jailed and managed by SaltStack, so in worst case scenario I could always redeploy "something" (service, webapp, etc) in minutes on $somemachine ..) No, the really SPOF that should be fixed quickly ATM is the shared files storage, it's a NFS mount on a single machine (with redundant power supply) and if the hardware die we're in troubles (...) > > > > >> > >> if not, i whould start again from scratch. > >> > >>> > >>> -Joe > >>> > >>> _______________________________________________ > >>> freebsd-fs@freebsd.org mailing list > >>> https://lists.freebsd.org/mailman/listinfo/freebsd-fs > >>> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" > >>> > >> _______________________________________________ > >> freebsd-fs@freebsd.org mailing list > >> https://lists.freebsd.org/mailman/listinfo/freebsd-fs > >> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" > > > -- Julien Cigar Belgian Biodiversity Platform (http://www.biodiversity.be) PGP fingerprint: EEF9 F697 4B68 D275 7B11 6A25 B2BB 3710 A204 23C0 No trees were killed in the creation of this message. However, many electrons were terribly inconvenienced. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAABCgAGBQJXdoZEAAoJELK7NxCiBCPAOO4QAOpHnQ/QIsIMS7+JZpGqF39A ZIUduicxuT/THwFzthPUObqlBUCBvXcnsEobzrR9iXAP/o8ysR+7guvA3+5KL1T8 enP58wb+ZLzCdOyB7zrdNAoL3pE7lpiYN5YgeqwpK0z7+57pCevFM37sgvSIqoE3 b5Zv+2Uc/C+uzEV2AkOgwM7F8zSLlVsIfZ79pEaEX8wWhihruXrme4QOvD/wGMnw vX1DdS+OKyV+NxeBpOTMUmdCg0ybYh7B8wxX44L2mGtbG0QaxFkbeAYo+ue0sBfn 6X9SZfE9wVB6ezYRUHYlq5pPcbtkwvUQQyJNI3RnA36Ow6SMrfhNoPiF48RB0d72 xSGvsT95rbBNLPkAxKLju+d13k54+YHdNT6KNxkzVxxFsZt5lq4eiVrxlGyRcUnK OpeU0TjCJP06koMB838yXMkfwtWmZMzVuIy0SKxTmww9CmxUqmC1CCBMOOSbRTU0 3OAaUQB+Xhza20d9zjlKm8ZrU0q6BTEQqSUnCMEkbEq5bq42r/9N+HsQqiIoLEcj BYgUGWzVVastPOb/NOggE5W5PNBG7M9cUm2Ylw+J4mcnxz2nKHKf+aB5y4X+jxvh r7Sq5HjTiMPzlunNlEk/CsBbX3NCp5C7AJGiVSGVORpFEtQRi5lcud6WLYjfttp2 AYUq6if4i/qS8JcXpuy/ =LsG7 -----END PGP SIGNATURE-----help
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