I tried to test pivot_root from command line after an unsuccessful
container start:
# cd /mnt/lxc
# ls
bin boot dev etc home lib lib64 media mnt opt proc root run sbin
selinux srv sys tmp usr var
# ls mnt
# pivot_root . /mnt/lxc/mnt
pivot_root: Invalid argument
There is some interesting piece of information in pivot_root(2) man
page:
The following restrictions apply to new_root and put_old:
...
- new_root and put_old must not be on the same file system as the
current root.
...
Maybe there is some difference in file systems between boot time and
running lxc-start later from a command line. But I'm afraid I don't
understand the pivot_root thing.
I'll try to summarize my findings on the lxc mailing list, maybe someone
can explain what's going on.
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