From: drbd-user-boun...@lists.linbit.com [mailto:drbd-user-boun...@lists.linbit.com] On Behalf Of Csanad Novak Sent: Tuesday, May 13, 2014 5:47 PM To: Arnold Krille; drbd-user@lists.linbit.com Subject: Re: [DRBD-user] DRDB on one host
Hi Arnold, I guess the challenge here is that the instance-storage get reseted completely (back to the point when its just a raw device without partitions) on every stop/start cycle. Currently I’m using a less than satisfactory solution on non critical servers, as follow: I’ve got mounted my instance-storage as /dev/sdb1 to /var I’ve got mounted my ebs device as /dev/sdc1 to /mnt/var-backup I’ve lsyncd configured to sync from /var to /mnt/var-backup I’ve wrote a little bash script for auto partitioning and mounting. When the instance get stopped for any reason the instance storage gets reseted and the whole /var directory destroyed. After boot up my script repartitioning the instance storage, mount it, and then automatically rsync back the data from /mnt/var-backup. There is several issue with this architecture, but the biggest one with lsyncd, which wasn’t designed for this. If I cloud change lsyncd to drbd, that would great. I must stress again: instance-storage is a local hard-disk based block device, while the ebs storage is a network attached block device. Cheers: Csanad From: Arnold Krille arn...@arnoldarts.de<mailto:arn...@arnoldarts.de> Reply: Arnold Krille arn...@arnoldarts.de<mailto:arn...@arnoldarts.de> Date: 14 May 2014 at 6:18:25 To: drbd-user@lists.linbit.com<mailto:drbd-user@lists.linbit.com> drbd-user@lists.linbit.com<mailto:drbd-user@lists.linbit.com> Subject: Re: [DRBD-user] DRDB on one host On Tue, 13 May 2014 09:57:21 +1200 Csanad Novak <csa...@pixelfusion.co.nz<mailto:csa...@pixelfusion.co.nz>> wrote: > Recently on the latest AWS Summit I’ve seen an interesting setup for > utilising the AWS EC2 instance storage. The instance storage is the > local filesystem on the Amazon cloud, unfortunately it is not > persistent - all data get lost if the instance stops. For persistent > storage one must use an so called EBS volume, which is a network > attached block device. Unfortunately the EBS storage performance is > varies, depending on the neighbour instances’ traffic. An ideal world > one can use the instance storage without the worry of data loss. > > On the latest AWS Summit a presenter proposed an architecture where > the instance storage was utilised and was synced with DRBD to the EBS > block > device. > http://www.slideshare.net/AmazonWebServices/so-you-think-you-are-an-aws-ninja-dean-samuels > - > slide 11. > > I wonder how an example config would looks like. I went trough > quickly on the tutorials, but couldn’t find any example with one host > setup. drbd on one host. Isn't that what raid/md is? I haven't had a chance to play with aws but if both ebs volumes and the instance-storage are block devices, it should be easy to mirror them with md or lvm. - Arnold ________________________________ _______________________________________________ drbd-user mailing list drbd-user@lists.linbit.com<mailto:drbd-user@lists.linbit.com> http://lists.linbit.com/mailman/listinfo/drbd-user -- Kind regards, [cid:image001.gif@01CF6F9E.577D9E80] Csanad Novak Technical Lead P / 09 353 1234<tel://09%20353%201234> M / 021 060 1531<tel://09%20353%201234> E / csa...@pixelfusion.co.nz<mailto:wou...@pixelfusion.co.nz> W / PIXELFUSION.CO.NZ<http://pixelfusion.co.nz/> / WHERE DESIGN & DEVELOPMENT FUSE A / SUITE 403 "FORBIDDEN", THE IRON BANK, 150 KARANGAHAPE RD, AUCKLAND / PIXEL FUSION LTD, PO BOX 68 564, NEWTON, AUCKLAND / MAP<http://maps.google.co.nz/maps?cid=7370666879334476751&q=Pixel+Fusion>
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