On 05/12/2015 02:00 AM, Jonathan Ballet wrote:
Hi,
On 05/10/2015 05:05 PM, Pavel Odintsov wrote:
Well, well. But why my 2.6.32 kernel become broken after change
Wheezy's init system to systemd? Standard 3.2 kernel from Debian works
perfectly with systemd.
If this problems is not related with kdbus but it's still it broke
ability to run OpenVZ kernel on modern distros.
If somebody will fix this issue I will be very pleased.
I tried booting one of the latest OpenVZ release on Debian Jessie with
systemd, and I got the error:
Failed to mount /sys/fs/cgroup: No such file or directory.
This is related to this bug :
https://bugzilla.redhat.com/show_bug.cgi?id=628004
Basically (AFAIU), the OpenVZ kernel lacks support for mounting
cgroups at the required place, which make systemd choke when starting
up in the early phase.
As mentioned in the bug report above, applying the patch from [1]
might be enough to "fix" the problem, but I haven't tested this one
and I'm not sure about the consequences.
I'm afraid you are wrong here, at least It's not the case for me --
with 2.6.32-042stab108.1 kernel and CentOS 7 OS template.
See:
[root@tpad-ovz1 ~]# vzctl enter 101
entered into CT 101
[root@efgh /]# ls -l /sys/fs
total 0
drwxr-xr-x 10 root root 200 Apr 28 01:04 cgroup
[root@efgh /]# ls -l /sys/fs/cgroup/
total 0
drwxr-xr-x 2 root root 0 Apr 28 01:04 blkio
drwxr-xr-x 2 root root 40 Apr 28 01:04 cpu,cpuacct
drwxr-xr-x 2 root root 40 Apr 28 01:04 cpuset
drwxr-xr-x 2 root root 40 Apr 28 01:04 freezer
drwxr-xr-x 2 root root 0 Apr 28 01:04 memory
drwxr-xr-x 2 root root 40 Apr 28 01:04 net_cls,net_prio
drwxr-xr-x 2 root root 40 Apr 28 01:04 perf_event
drwxr-xr-x 4 root root 0 Apr 28 01:04 systemd
[root@efgh /]# mount | grep cgroup
tmpfs on /sys/fs/cgroup type tmpfs (rw,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup
(rw,nosuid,nodev,noexec,relatime,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd)
cgroup on /sys/fs/cgroup/blkio type cgroup
(rw,nosuid,nodev,noexec,relatime,blkio,name=beancounter)
cgroup on /sys/fs/cgroup/memory type cgroup
(rw,nosuid,nodev,noexec,relatime,memory)
[root@efgh /]# logout
exited from CT 101
[root@tpad-ovz1 ~]# vzlist -o ostemplate 101
OSTEMPLATE
centos-7-x86_64-minimal
[root@tpad-ovz1 ~]# uname -a
Linux tpad-ovz1 2.6.32-042stab108.1 #1 SMP Thu Apr 23 19:17:11 MSK 2015
x86_64 x86_64 x86_64 GNU/Linux
In the meanwhile, I removed systemd from my Jessie installations and
switched back to sysvinit-core instead. It works, although that would
be cool to be able to use systemd.
Jonathan
[1]
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=676db4af043014e852f67ba0349dae0071bd11f3
On Sun, May 10, 2015 at 2:40 PM, Marco d'Itri
<md-k2ghghhv...@public.gmane.org> wrote:
On May 10, Pavel Odintsov
<pavel.odintsov-re5jqeeqqe8avxtiumw...@public.gmane.org> wrote:
Unfortunately, we can't run OpenVZ 2/6/32 kernel on top of systemd
aware system because it lacks kdbus subsystem. But if you changed init
All upstream kernels lack kdbus, and systemd does not depend on it.
--
ciao,
Marco
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