[Bug 1417909] Re: Container fails to start with error mounting /sys/fs/cgroup
Just re-read through this whole bug. It looks like what broke your setup is actually a bugfix in LXC wrt config inheritance. Your config contains: - lxc.mount.auto = - lxc.mount.auto = cgroup:mixed This instructs LXC (and that wasn't implemented right at first) to wipe all of lxc.mount.auto, and then set cgroup:mixed. Doing so unsets the default which did contain sys:mixed, causing the breakage you had. So the issue is that LXC actually does what you ask it to do now :) ** Changed in: lxc (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
Re: [Bug 1417909] Re: Container fails to start with error mounting /sys/fs/cgroup
Quoting Christopher Townsend (christopher.towns...@canonical.com): Hi Serge, Ok, I understand I can fix this issue by adding that line in my config. However, my gripe now with this is that my configuration was working with no issues prior to an update in LXC, then it broke for no apparent reason. Why was it automounting /sys before and not now? Shouldn't this be a default when pulling in /usr/share/lxc/config/ubuntu.common.conf as I do in my config? Your config includes /usr/share/lxc/config/common.conf, not /usr/share/lxc/config/ubuntu.common.conf . If you created a configuration using 'lxc-create', and that turned out not forward-compatible, then I would consider that a bug. And given the churn there has been recently I wouldn't be surprised if there were such cases. However, if your config was hand-created, then while I still consider this unfortunate, the newly increased commonality between config layouts for different distributions is worthwhile. I wonder whether we can come up with a versioning/backup scheme for configuration files to prevent this sort of thing in the future. The trick is that for most containers we do want to take updated configuration files, as that's the whole point. Perhaps what we need, the real bug here, is better documentation of what the *.$distro.* and *.common.* really mean and what a user is safe to use. status: confirmed importance: medium ** Changed in: lxc (Ubuntu) Importance: High = Medium ** Changed in: lxc (Ubuntu) Status: Invalid = Confirmed -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1417909] Re: Container fails to start with error mounting /sys/fs/cgroup
Hey Serge, Thanks for looking into this more and better documentation would be most helpful. I'm not really sure if it matters any more, but my python script does indeed ask to load /usr/share/lxc/config/ubuntu.common.conf. Here is the code snippet before I start adding custom config options: container.load_config(/etc/lxc/default.conf) container.load_config(/usr/share/lxc/config/ubuntu.common.conf) At any rate, I'll add the sys automount in my config and be done with it on my end. Thanks again! -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1417909] Re: Container fails to start with error mounting /sys/fs/cgroup
Hi Serge, Ok, I understand I can fix this issue by adding that line in my config. However, my gripe now with this is that my configuration was working with no issues prior to an update in LXC, then it broke for no apparent reason. Why was it automounting /sys before and not now? Shouldn't this be a default when pulling in /usr/share/lxc/config/ubuntu.common.conf as I do in my config? -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1417909] Re: Container fails to start with error mounting /sys/fs/cgroup
** Changed in: lxc (Ubuntu) Status: Incomplete = Confirmed -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1417909] Re: Container fails to start with error mounting /sys/fs/cgroup
Confused why this was marked confirmed/high prio, since there is as far as I ca ntell no bug in lxc here. The container rootfs came from an iso, but it's the configuration which was bad. Wherever you got your configuration, fix it there to make sure to mount a sysfs before attempting to mount things under the sysfs. ** Changed in: lxc (Ubuntu) Status: Confirmed = Invalid -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1417909] Re: Container fails to start with error mounting /sys/fs/cgroup
** Changed in: lxc (Ubuntu) Importance: Undecided = High -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1417909] Re: Container fails to start with error mounting /sys/fs/cgroup
Hey Serge, Yes, adding 'lxc.mount.auto = sys' fixes the issue. The container is an extracted ISO from http://cdimage.ubuntu.com/ubuntu- desktop-next/daily-live/current/vivid-desktop-amd64.iso for the Unity 8 in LXC project. -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1417909] Re: Container fails to start with error mounting /sys/fs/cgroup
thanks for submitting this bug. Could you tell us how you created the container? You should be able to solve this by adding lxc.mount.auto = sys as the first line of your configuration file. Please let us know if that does not fix the container start. ** Changed in: lxc (Ubuntu) Status: New = Incomplete -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1417909] Re: Container fails to start with error mounting /sys/fs/cgroup
This is the debug output when starting the container. ** Attachment added: debug.txt https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+attachment/4311947/+files/debug.txt -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
[Bug 1417909] Re: Container fails to start with error mounting /sys/fs/cgroup
This is the generated LXC config file. ** Attachment added: config https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+attachment/4311948/+files/config -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1417909 Title: Container fails to start with error mounting /sys/fs/cgroup To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1417909/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
