Lab 3.2 Unable to start container.

Lab 3.2. I'm using the LF pre-built Ubuntu 18.04 on VMware Workstation 15 Player.
Everthing seems to work fine until I try to start the container. I'm afraid the error messages don't mean much to me. Any guidance here would be appreciated. Thanks. ldt
- student@ubuntu:~$ cat /etc/subuid
- student:100000:65536
- student@ubuntu:~$ cat /etc/subgid
- student:100000:65536
- student@ubuntu:~$ cat /etc/lxc/lxc-usernet
- # USERNAME TYPE BRIDGE COUNT
- student veth lxcbr0 10
- student@ubuntu:~$ cat ~/.config/lxc/default.conf
- lxc.net.0.type = veth
- lxc.net.0.link = lxcbr0
- lxc.net.0.flags = up
- lxc.net.0.hwaddr = 00:16:3e:xx:xx:xx
- lxc.idmap = u 0 100000 65536
- lxc.idmap = g 0 100000 65536
- student@ubuntu:~$
...
- Distribution:
- ubuntu
- Release:
- xenial
- Architecture:
- amd64
- Downloading the image index
- Downloading the rootfs
- Downloading the metadata
- The image cache is now ready
- Unpacking the rootfs
- ---
- You just created an Ubuntu xenial amd64 (20200914_07:42) container.
- To enable SSH, run: apt install openssh-server
- No default root or user password are set by LXC.
- student@ubuntu:~$ lxc-start -n unpriv-cont-user -d
- lxc-start: unpriv-cont-user: lxccontainer.c: wait_on_daemonized_start: 842 Received container state "ABORTING" instead of "RUNNING"
- lxc-start: unpriv-cont-user: tools/lxc_start.c: main: 330 The container failed to start
- lxc-start: unpriv-cont-user: tools/lxc_start.c: main: 333 To get more details, run the container in foreground mode
- lxc-start: unpriv-cont-user: tools/lxc_start.c: main: 336 Additional information can be obtained by setting the --logfile and --logpriority options
- student@ubuntu:~$ lxc-start -n unpriv-cont-user -F --logfile=/tmp/logfile --logpriority=WARN
- lxc-start: unpriv-cont-user: network.c: lxc_create_network_unpriv_exec: 2178 lxc-user-nic failed to configure requested network: cmd/lxc_user_nic.c: 576: create_nic: Error attaching veth0YJFD5 to lxcbr0
- lxc-start: unpriv-cont-user: start.c: lxc_spawn: 1765 Failed to create the configured network
- lxc-start: unpriv-cont-user: start.c: __lxc_start: 1939 Failed to spawn container "unpriv-cont-user"
- lxc-start: unpriv-cont-user: tools/lxc_start.c: main: 330 The container failed to start
- lxc-start: unpriv-cont-user: tools/lxc_start.c: main: 336 Additional information can be obtained by setting the --logfile and --logpriority options
- student@ubuntu:~$ cat /tmp/logfile
- lxc-start unpriv-cont-user 20200914174644.524 WARN start - start.c:lxc_spawn:1746 - Operation not permitted - Failed to allocate new network namespace id
- lxc-start unpriv-cont-user 20200914174644.575 ERROR network - network.c:lxc_create_network_unpriv_exec:2178 - lxc-user-nic failed to configure requested network: cmd/lxc_user_nic.c: 576: create_nic: Error attaching veth0YJFD5 to lxcbr0
- lxc-start unpriv-cont-user 20200914174644.575 ERROR start - start.c:lxc_spawn:1765 - Failed to create the configured network
- lxc-start unpriv-cont-user 20200914174644.575 ERROR start - start.c:__lxc_start:1939 - Failed to spawn container "unpriv-cont-user"
- lxc-start unpriv-cont-user 20200914174645.124 ERROR lxc_start - tools/lxc_start.c:main:330 - The container failed to start
- lxc-start unpriv-cont-user 20200914174645.124 ERROR lxc_start - tools/lxc_start.c:main:336 - Additional information can be obtained by setting the --logfile and --logpriority options
- student@ubuntu:~$
Comments
-
Hi @ldt,
It is common to see different results when using different Linux distributions or even different images of the same distribution. The LF pre-built and maintained images are aimed mostly at development courses, and have not been tested against the content of this course.
What I notice to be slightly off are the UID and GID mappings from
/etc/subuid
and/etc/subgid
which show for thestudent
user values typically associated withroot
.Can you display the content of both
/etc/subuid
and/etc/subgid
files?Regards,
-Chris0 -
Hi @chrispokorni
Yes, those are shown in the top lines 1-4. But I have just verified them again. I did notice that the result is considerably different from what is shown in the lab. I'm missing the lxd:, root: and ubuntu: entries. I tried proceeding with the privileged container but got the same result. Lab 3.3 however, worked fine.0 -
I believe a different Ubuntu distribution/release will show different outputs, and this has already been reported earlier in the forum.
0
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