On 2/3/2011 1:47 PM, Trent W. Buck wrote:
> Gary Ballantyne
> <gary.ballant...@haulashore.com> writes:
>
>> # /usr/bin/lxc-execute -n foo -f
>> /usr/share/doc/lxc/examples/lxc-veth.conf /bin/bash
>>
>> The container fired up, and I could ping to/from the host. However, when
>> I left the container (with "exit") things got weird. In a second
>> terminal (already connected to the host), I got repeated errors of the form:
>>
>> [ 1396.169010] unregister_netdevice: waiting for lo to become free.
>> Usage count = 3.
>
> I don't know about that one, sorry. IIRC I got the lxc-ssh container to
> DTRT on 10.04, but it's entirely possible I was getting those dmesg
> errors and not seeing them, because I wasn't on a local tty.
Good point -- the errors are only shown on the local tty.
> UPDATE: oh, I see you're just using lxc-veth for bash... I dunno
> anything about that. I guess you could be getting that when bash tries
> to initialize itself (e.g. setting $HOSTNAME)? Do you get the same
> problems with /bin/dash or (say) /bin/pwd instead?
Same behavior with dash.
There is no science behind using lxc-veth, only that: (a), it went well
in 9.10; (b), it appears to use a bridge (which I read somewhere was the
safest/easiest option); and (c), it seemed a reasonable place to start.
>> Where the bracketed number changes for each error. (A new error appears
>> every 10 seconds or so).
>
> The bracketed number is the number of seconds since boot.
> The message is being emitted by the kernel.
>
>> Any suggestions?
>
> Show us your .conf.
Here is the .conf -- I have only changed .ipv4 from the lxc-veth.conf
that ships with the installation.
lxc.utsname = beta
lxc.network.type = veth
lxc.network.flags = up
lxc.network.link = br0
lxc.network.hwaddr = 4a:49:43:49:79:bf
lxc.network.ipv4 = 10.89.233.55/24
lxc.network.ipv6 = 2003:db8:1:0:214:1234:fe0b:3597
Here is /etc/network/interfaces (I have followed a recipe to set up the
bridge, but don't really know what I am doing here.)
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
#iface eth0 inet dhcp
iface eth0 inet manual
auto br0
iface br0 inet static
address 10.89.233.57
network 10.89.233.0
netmask 255.255.255.0
broadcast 10.89.233.255
gateway 10.89.233.1
bridge_ports eth0
bridge_fd 9
bridge_hello 2
bridge_maxage 12
bridge_stp off
> Maybe show us some diagnostics, too
These are after a reboot, followed by # /usr/bin/lxc-execute -n foo -f
/usr/share/doc/lxc/examples/lxc-veth.conf /bin/bash.
After "exit"-ing the container, the usual errors started appearing in
the local tty and I was told (on the remote tty):
lxc-execute: Device or resource busy - failed to remove cgroup '/cgroup/foo'
I am not sure if it is helpful to repeat the diagnostics below at this
stage or not -- please let me know if it would be helpful. Cheers.
> lxc-ps auxf
>From the container:
root@beta:/usr/share/doc/lxc/examples# lxc-ps auxf
CONTAINER USER PID %CPU %MEM VSZ RSS TTY STAT START
TIME COMMAND
foo root 1 0.0 0.1 2000 548 pts/0 S 10:22
0:00 /usr/lib/lxc/lxc-init -- /bin/bash
foo root 2 0.0 0.3 5204 1772 pts/0 S 10:22
0:00 /bin/bash
foo root 14 0.0 0.5 6332 2596 pts/0 S+ 10:22
0:00 \_ /usr/bin/perl /usr/bin/lxc-ps auxf
root 15 0.0 0.1 4556 964 pts/0 R+ 10:22
0:00 \_ ps auxf
>From the host:
# lxc-ps auxf
CONTAINER USER PID %CPU %MEM VSZ RSS TTY STAT START
TIME COMMAND
root 2 0.0 0.0 0 0 ? S Feb03
0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? S Feb03
0:00 \_ [ksoftirqd/0]
root 4 0.0 0.0 0 0 ? S Feb03
0:00 \_ [migration/0]
root 5 0.0 0.0 0 0 ? S Feb03
0:00 \_ [watchdog/0]
root 6 0.0 0.0 0 0 ? S Feb03
0:01 \_ [events/0]
root 7 0.0 0.0 0 0 ? S Feb03
0:00 \_ [cpuset]
root 8 0.0 0.0 0 0 ? S Feb03
0:00 \_ [khelper]
root 9 0.0 0.0 0 0 ? S Feb03
0:00 \_ [netns]
root 10 0.0 0.0 0 0 ? S Feb03
0:00 \_ [async/mgr]
root 11 0.0 0.0 0 0 ? S Feb03
0:00 \_ [pm]
root 12 0.0 0.0 0 0 ? S Feb03
0:00 \_ [sync_supers]
root 13 0.0 0.0 0 0 ? S Feb03
0:00 \_ [bdi-default]
root 14 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kintegrityd/0]
root 15 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kblockd/0]
root 16 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kacpid]
root 17 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kacpi_notify]
root 18 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kacpi_hotplug]
root 19 0.0 0.0 0 0 ? S Feb03
0:00 \_ [ata_aux]
root 20 0.0 0.0 0 0 ? S Feb03
0:00 \_ [ata_sff/0]
root 21 0.0 0.0 0 0 ? S Feb03
0:00 \_ [khubd]
root 22 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kseriod]
root 23 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kmmcd]
root 25 0.0 0.0 0 0 ? S Feb03
0:00 \_ [khungtaskd]
root 26 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kswapd0]
root 27 0.0 0.0 0 0 ? SN Feb03
0:00 \_ [ksmd]
root 28 0.0 0.0 0 0 ? S Feb03
0:00 \_ [aio/0]
root 29 0.0 0.0 0 0 ? S Feb03
0:00 \_ [ecryptfs-kthrea]
root 30 0.0 0.0 0 0 ? S Feb03
0:00 \_ [crypto/0]
root 35 0.0 0.0 0 0 ? S Feb03
0:00 \_ [pciehpd]
root 37 0.0 0.0 0 0 ? S Feb03
0:00 \_ [scsi_eh_0]
root 38 0.0 0.0 0 0 ? S Feb03
0:00 \_ [scsi_eh_1]
root 41 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kstriped]
root 42 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kmpathd/0]
root 43 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kmpath_handlerd]
root 44 0.0 0.0 0 0 ? S Feb03
0:00 \_ [ksnapd]
root 45 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kondemand/0]
root 46 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kconservative/0]
root 239 0.0 0.0 0 0 ? S Feb03
0:01 \_ [mpt_poll_0]
root 240 0.0 0.0 0 0 ? S Feb03
0:00 \_ [mpt/0]
root 241 0.0 0.0 0 0 ? S Feb03
0:00 \_ [scsi_eh_2]
root 256 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kdmflush]
root 267 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kdmflush]
root 274 0.0 0.0 0 0 ? S Feb03
0:00 \_ [jbd2/dm-0-8]
root 275 0.0 0.0 0 0 ? S Feb03
0:00 \_ [ext4-dio-unwrit]
root 539 0.0 0.0 0 0 ? S Feb03
0:00 \_ [kpsmoused]
root 548 0.0 0.0 0 0 ? S Feb03
0:01 \_ [vmmemctl]
root 1240 0.0 0.0 0 0 ? S 10:29
0:00 \_ [flush-251:0]
root 1 0.0 0.3 2856 1580 ? Ss Feb03
0:02 /sbin/init
root 320 0.0 0.1 2396 608 ? S Feb03
0:00 upstart-udev-bridge --daemon
root 326 0.0 0.1 2444 768 ? S<s Feb03
0:00 udevd --daemon
root 439 0.0 0.1 2332 616 ? S< Feb03
0:00 \_ udevd --daemon
root 463 0.0 0.1 2332 564 ? S< Feb03
0:00 \_ udevd --daemon
syslog 723 0.0 0.3 33980 1568 ? Sl Feb03
0:00 rsyslogd -c4
root 767 0.0 0.1 1860 564 tty4 Ss+ Feb03
0:00 /sbin/getty -8 38400 tty4
root 771 0.0 0.1 1860 564 tty5 Ss+ Feb03
0:00 /sbin/getty -8 38400 tty5
root 776 0.0 0.1 1860 560 tty2 Ss+ Feb03
0:00 /sbin/getty -8 38400 tty2
root 778 0.0 0.1 1860 564 tty3 Ss+ Feb03
0:00 /sbin/getty -8 38400 tty3
root 782 0.0 0.1 1860 564 tty6 Ss+ Feb03
0:00 /sbin/getty -8 38400 tty6
root 785 0.0 0.1 2460 796 ? Ss Feb03
0:00 cron
daemon 787 0.0 0.0 2320 356 ? Ss Feb03
0:00 atd
root 836 0.0 0.1 1860 568 tty1 Ss+ Feb03
0:00 /sbin/getty -8 38400 tty1
root 902 0.0 0.4 5644 2204 ? Ss Feb03
0:00 /usr/sbin/sshd -D
root 1091 0.0 0.5 8496 2900 ? Ss 10:16
0:00 \_ sshd: root@pts/0
root 1108 0.0 0.6 6428 3136 pts/0 Ss 10:17
0:00 | \_ -bash
root 1148 0.0 0.1 2000 748 pts/0 S 10:22
0:00 | \_ /usr/bin/lxc-execute -n foo -f
/usr/share/doc/lxc/examples/lxc-veth.conf /bin/bash
foo root 1161 0.0 0.1 2000 548 pts/0 S 10:22
0:00 | \_ /usr/lib/lxc/lxc-init -- /bin/bash
foo root 1173 0.0 0.3 5204 1796 pts/0 S+ 10:22
0:00 | \_ /bin/bash
root 1203 0.1 0.5 8496 2900 ? Ss 10:28
0:00 \_ sshd: root@pts/1
root 1219 0.1 0.5 6392 3048 pts/1 Ss 10:29
0:00 \_ -bash
root 1261 0.0 0.5 6332 2600 pts/1 S+ 10:31
0:00 \_ /usr/bin/perl /usr/bin/lxc-ps auxf
root 1262 0.0 0.1 4556 1012 pts/1 R+ 10:31
0:00 \_ ps auxf
> lxc-netstat --name "foo" -nlp
>From the container:
# lxc-netstat --name "foo" -nlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address
State PID/Program name
Active UNIX domain sockets (only servers)
Proto RefCnt Flags Type State I-Node PID/Program
name Path
>From the host:
# lxc-netstat --name "foo" -nlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address
State PID/Program name
Active UNIX domain sockets (only servers)
Proto RefCnt Flags Type State I-Node PID/Program
name Path
> netstat -nlp
>From the container:
# netstat -nlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address
State PID/Program name
Active UNIX domain sockets (only servers)
Proto RefCnt Flags Type State I-Node PID/Program
name Path
>From the host:
# netstat -nlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address
State PID/Program name
Active UNIX domain sockets (only servers)
Proto RefCnt Flags Type State I-Node PID/Program
name Path
> ip l
>From the container:
# ip l
4: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UP qlen 1000
link/ether 4a:49:43:49:79:bf brd ff:ff:ff:ff:ff:ff
6: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>From the host:
# ip l
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UNKNOWN qlen 1000
link/ether 00:0c:29:a3:c3:82 brd ff:ff:ff:ff:ff:ff
3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN
link/ether 00:0c:29:a3:c3:82 brd ff:ff:ff:ff:ff:ff
5: veth79e2MM: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast state UP qlen 1000
link/ether 4a:12:1a:d0:48:6c brd ff:ff:ff:ff:ff:ff
> ip a
>From the container:
# ip a
4: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UP qlen 1000
link/ether 4a:49:43:49:79:bf brd ff:ff:ff:ff:ff:ff
inet 10.89.233.55/24 brd 10.89.233.0 scope global eth0
inet6 2003:db8:1:0:214:1234:fe0b:3597/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::4849:43ff:fe49:79bf/64 scope link
valid_lft forever preferred_lft forever
6: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
>From the host:
# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UNKNOWN qlen 1000
link/ether 00:0c:29:a3:c3:82 brd ff:ff:ff:ff:ff:ff
inet6 fe80::20c:29ff:fea3:c382/64 scope link
valid_lft forever preferred_lft forever
3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state
UNKNOWN
link/ether 00:0c:29:a3:c3:82 brd ff:ff:ff:ff:ff:ff
inet 10.89.233.57/24 brd 10.89.233.255 scope global br0
inet6 fe80::20c:29ff:fea3:c382/64 scope link
valid_lft forever preferred_lft forever
5: veth79e2MM: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc
pfifo_fast state UP qlen 1000
link/ether 4a:12:1a:d0:48:6c brd ff:ff:ff:ff:ff:ff
inet6 fe80::4812:1aff:fed0:486c/64 scope link
valid_lft forever preferred_lft forever
> ip r
>From the container:
# ip r
10.89.233.0/24 dev eth0 proto kernel scope link src 10.89.233.55
>From the host:
# ip r
10.89.233.0/24 dev br0 proto kernel scope link src 10.89.233.57
default via 10.89.233.1 dev br0 metric 100
>
>
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