Andy, do you run a mail relay/smarthost for customers?
I've got nullmailer running on one of my VPS, and it looks like I
configured it with a bitfolk.com smarthost, but it doesn't dig/accept SMTP
(so I'm guessing it either used to exist and doesn't any more, or it never
existed and I just made some shit up)
Kind regards
Murray Crane
Hi,
If you aren't running 32-bit Ubuntu then you can probably skip this
message.
A customer reported that they'd updated their 32-bit Ubuntu 18.04
VPS and now the kernel doesn't boot. I had a look and indeed the
latest 32-bit linux-image-generic immediately kernel panics.
This means that if you're on 32-bit and you try to boot into it,
your VPS won't boot. Also it means that currently 32-bit Ubuntu
18.04 installs aren't possible because the installer kernel won't
boot.
I haven't yet had any reports of the same thing happening in other
versions of Ubuntu, but it might do since presumably there is some
security patch being pushed out (I'm going to take a wild stab at
32-bit KPTI protection) that is broken, so it might hit any
supported version of 32-bit Ubuntu.
The only quick way I have found to work around this at present is
to run a 64-bit kernel. Here's how you'd do that, assuming that your
VPS is currently unbootable.
xen-shell> rescue
(boot and log in to rescue VM)
$ sudo mount /dev/xvda1 /mnt
$ sudo mount --bind /dev /mnt/dev
$ sudo mount --bind /sys /mnt/sys
$ sudo mount --bind /proc /mnt/proc
$ sudo chroot /mnt /bin/bash
# dpkg --add-architecture amd64
# apt update
# apt install linux-image-generic:amd64
# exit
$ sudo halt
xen-shell> arch x86_64
xen-shell> boot
This:
1) Enables multi-arch on your VPS and says that amd64 architecture
packages are acceptable
2) Installs a 64-bit kernel
3) Boots into it
You will then be running a 64-bit kernel with a 32-bit user land. It
should work fine and continue offering you updated 64-bit kernel
packages and updates 32-bit packages for everything else.
If you were brave you could completely cross-grade to amd64 but it
is a complicated, risky and unsupported procedure.
Another workaround may be to boot into rescue and do a chroot as
above, but then downgrade the kernel package.
I will attempt to replicate the problem and report it to Ubuntu.
Cheers,
Andy
--
https://bitfolk.com/ -- No-nonsense VPS hosting
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Hi Everyone (Andy especially)
Have any of you done a "P2V" (ha!) of your VPS into LXD/LXC? I've done some
Googling, and from what I see, it shouldn't be too difficult in my case:
the VPS is running Ubuntu 16.04.4, there's a template for that, I've plenty
of room on the "target" LXD machine for a <10GB fs.
But...
I'm wondering about the feasibility of getting a tarball of the VPS fs
(Andy?)? I've got space on the VPS in question to make a tarball of itself,
but I'm not sure that would be the best idea (writing to the very FS I'm
trying to archive, just feels wrong before I try to do it).
Thoughts/comments sought/appreciated.
Kind regards
Murray Crane
*Background*
One of my VPS is basically just used as a mailserver and slave DNS server
and a couple of other minor things. Recently I wanted to overhaul the
mailserver changing some of the software. The stuff I wanted to use was
only available as 64 bit.
This got me thinking that the VPS is littered with remains of old junk data
files etc from previous things as I have upgraded from Debian versions
dynamically rather than fresh installs, so here was an excuse to move to 64
bit.
Yes I know and understand the pros and cons.
I have studied various guides to doing this via the Debian web site and
elsewhere and know what needs to be done, but I need a small bit of advice.
My current Kernel is linux-image-4.9.110-3+deb9u1
I plan to rsync all relevant data files (maildirectories, Bind conf files,
.authorisedkeys, mysql dumps etc.) over to my home machine and redirect
mail to the backup server then nuke the VPS with a complete new install of
Debian stable and set up as a 64 bit install.
*Question*
Does the Bitfolk self-service-network-installer coe with a 64 bit option,
or do I have to install Debian stable then convert to amd64. This would
still be an easy option as there would be very little software to
convert/replace. I would need to install a multiarch capable kernel after
using the installer (and do a second Xen retart)
If this seems a naive question sorry, we all have to learn at some time.
Thanks in advance
--
Keith Williams
คืนใดมืดที่สุด จะเห็นดาวชัดที่สุด
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FCLT magazine http://issuu.com/fcltmagazine/docs/fclt_september_2014_issue_1
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Keith's Place www.keiths-place.co.uk
Tailor Made English www.tmenglish.org
Hello,
I'm afraid there's another round of security updates needed as a
flaw has been discovered in some (Xen-specific) parts of the Linux
kernel.
It's not the hypervisor this time but it still needs a kernel
upgrade on our side so the effect is basically the same, so there
will be another reboot of all servers, likely in the early hours (UK
time) of 11–13 August.
Customers will soon receive an individual email confirming the
hour-long maintenance window specific to their server(s). The actual
work is expected to take 10–30 minutes within that window.
As before we should be able to do a suspend/restore if you have
enabled that at:
<https://panel.bitfolk.com/account/config/>
Cheers,
Andy
--
https://bitfolk.com/ -- No-nonsense VPS hosting
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Hi,
It looks like the recent Debian stretch updated kernel doesn't boot
under Xen:
<https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903767>
This also means that right now you cannot self-install Debian
stable.
If you reboot and experience this, you will need to boot back into
the previous kernel. I am investigating now if there is any quick
fix or workaround. In the mean time those affected should follow
that bug to know when it is resolved.
Cheers,
Andy
--
https://bitfolk.com/ -- No-nonsense VPS hosting
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