Re: [lxc-users] Questions about kernel version dependencies for unprivileged containers

[Fajar A. Nugraha]

On Tue, Oct 25, 2016 at 8:49 AM, 飞颜  wrote:

> Dear Fajar，
>
> Thanks for your reply.
>
> userns introduce in "ttps://lwn.net/Articles/532593/
> " is completed in Linux 3.8, which is
> difference between 3.12 and 3.8 LXC dependencies.
>
>
Did you read the next line? "The remaining work consists of changes for XFS
and a number of other filesystems;" The easiest way to find out which
changes go to which version would be by reading the kernel changelog. My
guess is the additional changes was only completed in 3.12.

IMHO a more valid question would be "why would you need an older version"?
Even for an acient centos6, you can use kernel-ml from elrepo (currently at
4.8.4). Or use Oracle's uek (4.1).

-- 
Fajar
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Re: [lxc-users] Questions about kernel version dependencies for unprivileged containers

[飞颜]

Dear Fajar，

Thanks for your reply.

userns introduce in "ttps://lwn.net/Articles/532593/
" is completed in Linux 3.8, which is
difference between 3.12 and 3.8 LXC dependencies.

Regards,
Yanfei

2016-10-24 16:36 GMT+08:00 Fajar A. Nugraha :

> On Mon, Oct 24, 2016 at 2:52 PM, 飞颜  wrote:
>
>> Dear all，
>>
>> Extra dependencies for unprivileged containers need Linux kernel
>> >= 3.12 , Seen in URL "https://linuxcontainers.org/lxc/getting-started/;,
>> "https://linuxcontainers.org/lxc/security/; and "
>> https://www.stgraber.org/2014/01/17/lxc-1-0-unprivileged-containers/; .
>>
>> If kernel version lower than 3.12, why can not use unprivileged
>> containers?
>>
>>
>
>
> Should be because of userns: https://lwn.net/Articles/532593/
>
> --
> Fajar
>
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Re: [lxc-users] LXC containers w/ static IPs work on some hosts, not on others

[Pierce Ng]

On Thu, Oct 20, 2016 at 02:07:09PM -0400, Michael Peek wrote:
> I started out with lxd but ran into problems when I tried googling for
> instructions on how to assign a static IP address to a container. 

I set static IP for my LXD containers by configuring each container's
/etc/network/interfaces.d/50-cloud-init.cfg:

  auto lo
  iface lo inet loopback
  
  auto eth0
  iface eth0 inet static
address 10.x.x.x
netmask 255.255.255.0
network 10.x.x.x
broadcast 10.x.x.x
gateway 10.x.x.x
dns-nameservers 10.x.x.x
dns-search xxx.xxx

HTH.

Pierce
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[lxc-users] Live migration from UEFI to BIOS host

[McDonagh, Ed]

Dear experts

With lxd 2.0.5, I can now take stateful snapshots which I guess confirms 
closing of https://bugs.launchpad.net/ubuntu/+source/criu/+bug/1626100, though 
I haven't tested it thoroughly.

I now have the following error when trying to do a live migration from h2 (a 
UEFI booted host, I now discover) to h1 (a BIOS booted host):

error: migration restore failed
(00.008782) Warn  (cr-restore.c:1159): Set CLONE_PARENT | CLONE_NEWPID but it 
might cause restore problem,because not all kernels support such clone flags 
combinations!
(00.298284)  1: Error (mount.c:2406): mnt: Can't mount at 
./sys/firmware/efi/efivars: No such file or directory
(00.298292)  1: Error (mount.c:2555): mnt: Unable to statfs 
./sys/firmware/efi/efivars: No such file or directory
(00.314227) Error (cr-restore.c:1352): 5857 killed by signal 9
(00.358573) Error (cr-restore.c:2182): Restoring FAILED.

I am assuming the issue is that h1 does not have a /sys/firmware/efi folder.

Is it not possible to migrate in these circumstances?

Thanks in advance.

Ed

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Re: [lxc-users] Questions about kernel version dependencies for unprivileged containers

[Fajar A. Nugraha]

On Mon, Oct 24, 2016 at 2:52 PM, 飞颜  wrote:

> Dear all，
>
> Extra dependencies for unprivileged containers need Linux kernel
> >= 3.12 , Seen in URL "https://linuxcontainers.org/lxc/getting-started/;,
> "https://linuxcontainers.org/lxc/security/; and "https://www.stgraber.org/
> 2014/01/17/lxc-1-0-unprivileged-containers/" .
>
> If kernel version lower than 3.12, why can not use unprivileged
> containers?
>
>


Should be because of userns: https://lwn.net/Articles/532593/

-- 
Fajar
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[lxc-users] Questions about kernel version dependencies for unprivileged containers

[飞颜]

Dear all，

Extra dependencies for unprivileged containers need Linux kernel >=
3.12 , Seen in URL "https://linuxcontainers.org/lxc/getting-started/;, "
https://linuxcontainers.org/lxc/security/; and "
https://www.stgraber.org/2014/01/17/lxc-1-0-unprivileged-containers/; .

If kernel version lower than 3.12, why can not use unprivileged
containers?

Regards,
Yanfei
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