On 19/02/16 11:39, Serge Hallyn wrote:
echo 0 > /proc/sys/fs/protected_hardlinks
Thanks for the response Serge but this "problem" all but makes unpriv
containers (xenial at least) unusable. Todays example...
Unpacking systemd (229-1ubuntu2) over (228-5ubuntu3) ...
dpkg: error processing archive
/var/cache/apt/archives/systemd_229-1ubuntu2_amd64.deb (--unpack):
unable to make backup link of './bin/systemctl' before installing new
version: Operation not permitted
Are you using overlayfs clones? Or using a readonly mount of the
host's / ?
No, nothing other than a stock standard launch on a btrfs host.
Otherwise this shouldn't be happening. I can hardlink
/bin/systemctl just fine as root in an unprivileged container.
Thanks for the clarification.
I'm using an old container that I have been upgrading for almost a year
now so goodness knows what state it really is in. I'll launch another
one from scratch and see if that fixes this issue without turning off
/proc/sys/fs/protected_hardlinks.
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