I agree that lxc-start need better error logging, not only for lxc-start, but
for most lxc-* tools. But on the other hand, dev properly are too busy
straighten out other issue for lxc v2.
Regarding your issue, you can try following:
lxc-start-ephemeral -n e1 -l 9 -o test -d
The “-l 9” (lower-case L) set the log level to 9. That should give you more
information. Without it the log level is default to 0 or 1, which is the same
as what you see on screen (stderr).
John Siu
> On Feb 21, 2016, at 18:50, Akshay Karle <[email protected]> wrote:
>
> Hello lxc users,
>
> After having used lxc for a while now, I've realized that when the container
> fails to start, it fails with a very generic message as follows:
>
> $ lxc-start -n test
> lxc-start: lxc_start.c: main: 344 The container failed to start.
> lxc-start: lxc_start.c: main: 346 To get more details, run the container in
> foreground mode.
> lxc-start: lxc_start.c: main: 348 Additional information can be obtained by
> setting the --logfile and --logpriority options.
>
> And if you are using ephemeral containers, the error is even more generic and
> with no way to increase the log level:
>
> $ lxc-start-ephemeral -n e1 -o test -d
> setting rootfs to .%s. /home/vagrant/.local/share/lxc/e1/rootfs
> The container 'e1' failed to start.
>
> I was wondering if someone felt the need of having a little more meaningful
> error messages giving a summary of the error in the console output. The
> container logfile does have way more descriptive error messages, but since
> you don't directly have the errors in the console output, you are forced to
> open the logfiles everytime something goes wrong. Instead if you had an
> output that just included a few important error lines from the logfile such
> as the following example:
>
> $ lxc-start -n test
> lxc-start: lxc_start.c: main: 344 The container failed to start.
> lxc_start - start.c:lxc_spawn:1031 - failed creating cgroups
> lxc-start: lxc_start.c: main: 346 To get more details, run the container in
> foreground mode.
> lxc-start: lxc_start.c: main: 348 Additional information can be obtained by
> setting the --logfile and --logpriority options.
>
> Do you think this would help? Although I have no idea if this is simple to
> implement, I just wanted to get your ideas, suggestions and concerns (if any)
> before attempting to figure out a solution.
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