[Users] distro virtuozzo vs proxmox
Jehan PROCACCIA
jehan.procaccia at tem-tsp.eu
Sun Apr 28 22:55:03 MSK 2019
regarding distros and virtuozzo vs proxmox (reason I modified the subject, orig: SSD trim support over a LUKS layer)
I understand that it could be frustrating to rely on a dedidcated distro (virtuozzo 7), but I guess it comes with simplicity and consistency regarding set of packages and updates
after all it's very similar to centos/rhel 7 as it is based on it, and if you wish , you could add openvz7 feature to native centos7 : https://enjoyko.blogspot.com/2018/05/how-to-install-openvz-7-to-centos-7.html
I guess that https://wiki.openvz.org/Comparison is quite up to date as it dates from jan/2019
but i am still wondering what technology virtuozzo 7 uses for containers if not LXC ?
I'll be glad to know as I have regularly discussions between sysadmins around proxmox and virtuozzo , and finally it ends on debian vs centos/rhel !
----- Mail original -----
De: "Narcis Garcia" <informatica at actiu.net>
À: "OpenVZ users" <users at openvz.org>
Envoyé: Samedi 27 Avril 2019 19:19:43
Objet: Re: [Users] SSD trim support over a LUKS layer
The problem of Virtuozzo 7 for me is that this is a distro.
I prefer to use general purpose distros, for many reasons around
packaged software, community support, future plans and others.
El 27/4/19 a les 19:09, Paulo Coghi - Coghi IT ha escrit:
> LXC is far to be an option, IMHO.
>
> I'm happily using Virtuozzo 7 with multiple NVMe storages with zero
> issues for more than a year.
>
> On Sat, Apr 27, 2019 at 4:28 PM CoolCold <coolthecold at gmail.com
> <mailto:coolthecold at gmail.com>> wrote:
>
> I believe to have fixes and backports like this in to legacy version
> of product will not happen, and you should consider upgrading.
> Personally, I've upgraded to lxc.. it's quite primitive comparing to
> ovz 6, but it's enough for my needs.
>
> On Sat, Apr 27, 2019, 17:49 spameden <spameden at gmail.com
> <mailto:spameden at gmail.com>> wrote:
>
> Yes, it's an issue in kernel.
>
> As dm-crypt/luks layer isn't passing TRIM to the underlying device.
>
> /boot is not encrypted that's why it works for you.
>
> сб, 27 апр. 2019 г. в 11:11, Narcis Garcia
> <informatica at actiu.net <mailto:informatica at actiu.net>>:
>
> See in the case that /dev/sda1 (Directly mounted as Ext4 on
> /boot) works with Trim/Discard.
> It's the sda2_crypt (layer over sda2) that is not detected
> to be trimmable. Devuan's stock kernel does.
>
> CentOS issue #6548 may not be this same bug; I've tested now
> with CentOS 6.8 with a similar (but not same) result*:*
>
> $ lsb_release -d
> Description: CentOS release 6.8 (Final)
>
> $ uname -a
> Linux localhost.localdomain 2.6.32-642.el6.x86_64 #1 SMP Tue
> May 10 17:27:01 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
>
> $ lsblk --discard /dev/sda
> NAME
> DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO
> sda
> 0 512B 2G 0
> ├─sda1
> 0 512B 2G 0
> └─sda2
> 0 512B 2G 0
> └─luks-f691f48b-8556-487d-ac64-50daa99ed4c9 (dm-0)
> 0 512B 2G 0
>
> $ cat /etc/crypttab
> luks-f691f48b-8556-487d-ac64-50daa99ed4c9
> UUID=f691f48b-8556-487d-ac64-50daa99ed4c9 none luks,discard
>
> $ mount | grep -e discard
> /dev/mapper/luks-f691f48b-8556-487d-ac64-50daa99ed4c9 on /
> type ext4 (rw,discard)
> /dev/sda1 on /boot type ext4 (rw,discard)
>
> $ sudo fstrim /boot
> # (same result as Devuan/1 and OpenVZ/6 kernel: success)
>
> $ sudo fstrim /
> fstrim: /: FITRIM ioctl failed: Operation not supported
>
>
> El 26/4/19 a les 21:36, spameden ha escrit:
>> Hi.
>>
>> I've asked this question years ago (in
>> 2013): https://lists.openvz.org/pipermail/users/2013-August/005250.html
>>
>> Let me know if it helps, but this bug should have been
>> fixed in CentOS and RHEL at
>> least: https://bugs.centos.org/view.php?id=6548
>>
>> Maybe OpenVZ maintainers didn't pick up this fix in the
>> openvz6 legacy kernel?
>>
>> Thanks.
>>
>> ср, 10 апр. 2019 г. в 10:45, Narcis Garcia
>> <informatica at actiu.net <mailto:informatica at actiu.net>>:
>>
>> Does anybody know how can I solve this?
>>
>> $ lsb_release -d
>> Description: Devuan GNU/Linux 1.0 (jessie)
>>
>> $ uname -a
>> Linux bell1 2.6.32-openvz-042stab134.8-amd64 #1 SMP
>> Fri Dec 7 17:18:40
>> MSK 2018 x86_64 GNU/Linux
>>
>> $ lsblk --discard /dev/sda
>> NAME DISC-ALN DISC-GRAN DISC-MAX DISC-ZERO
>> sda 0 512B 2G 0
>> ├─sda1 0 512B 2G 0
>> └─sda2 0 512B 2G 0
>> └─sda2_crypt 0 0B 0B 0
>>
>> $ cat /etc/crypttab
>> sda2_crypt UUID=***** none luks,discard
>>
>> $ mount | grep -e discard
>> /dev/mapper/sda2_crypt on / type ext4
>> (rw,noatime,errors=remount-ro,barrier=1,data=ordered,discard)
>> /dev/sda1 on /boot type ext4
>> (rw,relatime,barrier=1,data=ordered,discard)
>>
>> $ sudo fstrim /
>> fstrim: /: the discard operation is not supported
>>
>> Thank you.
>>
>>
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