[Users] Ploop Incremental backups strategy

[tranxene50]

Hello Steffan.

I am writing a "survival" guide in English: please let me some time to 
finish it. ;-)

Have a nice day!

Le 11/09/2020 à 15:53, mailinglist at tikklik.nl a écrit :
> Thanx, im looking in to it, it looks very nice Im missing some documentation so i have some quastions...
>
> 1)
> So if you take live backups
> Then the seccond backup is incremental any you can in case of emergancy take the last incremental backup to restore the whole CT?
>
> 2) in your cron you use this, " -l 6 -q" can you explain what that does?
>
> 3)Push and pull
> I miss documentation how to setup.
> Have you any experiance in performance on push vs pull On my own nodes i can install the script on the live node But i also have clients with nodes i backup, but i dont want them to give access directly tot he backup server.
>
> 4) at night i want to backup, from tha main backup server to a remote sitelocation
>      In case of a big desaster 😊
>     what do i need tor sync?
>     Everything with a date file/map name?
>    and include the data dir?
>
> Mayby for the future the option to pull the last update to a remote server 😊
>
> Thanxs for the time.
>
> Steffan
>
> -----Oorspronkelijk bericht-----
> Van: users-bounces at openvz.org <users-bounces at openvz.org> Namens tranxene50
> Verzonden: woensdag 9 september 2020 01:02
> Aan: users at openvz.org
> Onderwerp: Re: [Users] Ploop Incremental backups strategy
>
> Hello!
>
> Please forgive my bad English, I live in France.
>
> A few years ago, as a hobby in the beginning, I created a file based "incremental" backup tool (that heavily relies on rsync) :
> https://www.openvz-diff-backups.fr
>
> It works flawlessly with OpenVZ 6 but only have been rapidly tested with OpenVZ 7.
>
> The main difference between OpenVZ 6 and 7 is that memory dump
> (checkpoint) is now done using CRIU instead of OpenVZ "Legacy" kernel.
>
> But,  globally, the process is still the same: create a ploop snapshot, mount it, sync it (with rsync) and then create a "diff" backup (using rsync again with --link-dest).
>
> As far as I know, this is one of the rarest GPL tools (any hint
> appreciated!) able to backup/restore CT files and, most importantly, full memory state.
>
> Restoring a "live" backup is like resuming an OS (Windows, Linux, MacOS,
> etc) after it had been put to sleep: the container will resume and works again, just like nothing had happen.
>
> So you can cheat and pretend 100% uptime even if a container was down most of the time... (evidently this a joke and, please, do not play at this game: /var/log/* will betray you)
>
> Note: to migrate CT between OpenVZ 6 and 7, you must use "cold" backups because memory dumps are incompatible (OpenVZ Kernel vs CRIU).
>
> To answer your questions:
>
> 1) you can restore any previous backup because each one is considered as a full backup (no diff/incremental computing: it is just files/directories/other - and hard links)
>
> 2) because backups are just a bunch of files (and mostly hard links), you can easily browse any backup of a CT and copy any files/directories needed
>
> At the moment, development of openvz-diff-backups is on pause - because it fulfills all my needs with OpenVZ 6 - but I am in the process of moving to OpenVZ 7 in a few months.
>
> So, if you encounter a bug or an issue, please leave me a message: the tool has a very conservative approach and is designed to cleanly stop if anything unexpected/unknown/abnormal happens.
>
> Have a nice day!
>
> Le 08/09/2020 à 14:24, mailinglist at tikklik.nl a écrit :
>> Hello,
>>
>> Using openvz7
>> Im looking ad my backup strategy
>> I allways used rsync on openvz6
>> And looks like on openvz7 this can also be done on /vz/root/VEID But i
>> dont know if i can do a full restore from that...
>>
>>
>> Now im looking at snapshots
>> https://github.com/TamCore/vzpbackup
>> it can make full backups and incremental backups
>>
>> Is someone using this script?
>> i have some question hope someone can help
>>
>> the incremental backups are nice to save space and time on a remote
>> backupserver But how does a restore works.
>> For what i know you can only restore a full snapshot, the incremental
>> backups have only the changed files
>>
>> Question 2.
>> Is it possible to extract a file from the backup for a single file restore?
>> And if so can someone tell me how?
>>
>>
>> Thanxs
>> Steffan
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at openvz.org
>> https://lists.openvz.org/mailman/listinfo/users
> --
> tranxene50
> tranxene50 at openvz-diff-backups.fr
>
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-- 
tranxene50
tranxene50 at openvz-diff-backups.fr