[lxc-users] Unprivileged container strange behaviour

[Ruzsinszky Attila]

Hi,

This is my 1st unprivileged container.

Host is Ubuntu 14.04 64 bit.
Container is Ubuntu 16.04 64 bit. It was created by lxc-create.
LXC version is: 2.0.3.

"nincs csatolva" means in English: not mounted.

rattila at fcubi:~$ lxc-start -F -n lub8
umount:
/usr/lib/x86_64-linux-gnu/lxc/sys/fs/cgroup/blkio/user/1000.user/c4.session/lxc/lub8
nincs csatolva
                           umount:
/usr/lib/x86_64-linux-gnu/lxc/sys/fs/cgroup/cpuset/user/1000.user/c4.session/lxc/lub8
nincs csatolva
                                                       umount:
/usr/lib/x86_64-linux-gnu/lxc/sys/fs/cgroup/cpu/user/1000.user/c4.session/lxc/lub8
nincs csatolva
umount:
/usr/lib/x86_64-linux-gnu/lxc/sys/fs/cgroup/cpuacct/user/1000.user/c4.session/lxc/lub8
nincs csatolva
                             umount:
/usr/lib/x86_64-linux-gnu/lxc/sys/fs/cgroup/devices/user/1000.user/c4.session/lxc/lub8
nincs csatolva
                                                          umount:
/usr/lib/x86_64-linux-gnu/lxc/sys/fs/cgroup/freezer/user/rattila/1/lxc/lub8
nincs csatolva

umount:
/usr/lib/x86_64-linux-gnu/lxc/sys/fs/cgroup/hugetlb/user/1000.user/c4.session/lxc/lub8
nincs csatolva
                         umount:
/usr/lib/x86_64-linux-gnu/lxc/sys/fs/cgroup/memory/user/rattila/1/lxc/lub8
nincs csatolva
                                          umount:
/usr/lib/x86_64-linux-gnu/lxc/sys/fs/cgroup/perf_event/user/1000.user/c4.session/lxc/lub8
nincs csatolva

umount:
/usr/lib/x86_64-linux-gnu/lxc/sys/fs/cgroup/systemd/user/1000.user/c4.session/lxc/lub8
nincs csatolva
                       systemd 229 running in system mode. (+PAM +AUDIT
+SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT
+GNUTLS +ACL +XZ -LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN)
Detected virtualization lxc.
Detected architecture x86-64.

Welcome to Ubuntu 16.04.1 LTS!

Set hostname to <lub8>.
Failed to read AF_UNIX datagram queue length, ignoring: No such file or
directory
Failed to install release agent, ignoring: No such file or directory
Couldn't move remaining userspace processes, ignoring: Invalid argument
[  OK  ] Reached target Encrypted Volumes.
...
[  OK  ] Started Journal Service.
[FAILED] Failed to mount Huge Pages File System.
See 'systemctl status dev-hugepages.mount' for details.
[  OK  ] Started Remount Root and Kernel File Systems.
         Starting Load/Save Random Seed...
...
[FAILED] Failed to start Set console scheme.
See 'systemctl status setvtrgb.service' for details.
[  OK  ] Started getty on tty2-tty6 if dbus and logind are not available.
[FAILED] Failed to start Raise network interfaces.
See 'systemctl status networking.service' for details.
[  OK  ] Reached target Network.
...
(I got the login prompt after 5 mins. because of failed network.)

root at lub8:~# init 0
[  OK  ] Stopped target Timers.
[  OK  ] Reached target Unmount All Filesystems.
...
[  OK  ] Stopped Load/Save Random Seed.
[FAILED] Failed unmounting /dev/null.
[  OK  ] Unmounted /dev/zero.
[  OK  ] Reached target Shutdown.

Broadcast message from systemd-journald at lub8 (Thu 2016-07-28 05:23:35 UTC):

systemd[1]: Caught <ABRT>, dumped core as pid 699.


Broadcast message from systemd-journald at lub8 (Thu 2016-07-28 05:23:35 UTC):

systemd[1]: Freezing execution.

... and it was freezed. Waiting for something.
>From the above "[FAILED] Failed to start Raise network interfaces." is true
because I haven't configured OVS for this container.

Switching off lub8 (finishing the freezing):
rattila at fcubi:~/.local/share/lxc/lub8$ lxc-stop -n lub8
lxc-stop: monitor.c: lxc_monitor_read_fdset: 244 No such file or directory
- client failed to recv (monitord died?) No such file or directory
rattila at fcubi:~/.local/share/lxc/lub8$

Other problem:
>From the config file for lub8:

# Network configuration
lxc.network.type = veth
lxc.network.link = vbr0
lxc.network.veth.pair = veth-lub8
lxc.network.flags = up

There isn't veth-lub8 interface on host. Instead of this there is the
generated Ethernet interface which will be renamed every time when I
(re)start lub8:
vethSIIWU5 Link encap:Ethernet  HWaddr fe:db:7d:ba:17:5a
For OVS config I need permanent interface name!

Can I solve these problems?

TIA,
Ruzsi
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