This is necessary because normally `apparmor_parser -r` will try to
create a temporary directory on the host (which is not allowed if the
host has a rootfs). However, the -K option bypasses saving things to the
cache (which avoids this issue).
% apparmor_parser -r /tmp/docker-profile
mkstemp: Read-only file system
% apparmor_parser -Kr /tmp/docker-profile
%
In addition, add extra information to the ensureDefaultAppArmorProfile
errors so that problems like this are easier to debug.
Fixes: 2f7596aaef3a ("apparmor: do not save profile to /etc/apparmor.d")
Signed-off-by: Aleksa Sarai <asarai@suse.de>
Upstream-commit: dd340c52cb37d29d8bae687fdc60e039341b4295
Component: engine
In certain cases (unattended upgrades), system services can disable
loaded AppArmor profiles. However, since /etc being read-only is a
supported setup we cannot just write a copy of the profile to
/etc/apparmor.d.
Instead, dynamically load the docker-default AppArmor profile if a
container is started with that profile set. This code will short-cut if
the profile is already loaded.
Fixes: 2f7596aaef3a ("apparmor: do not save profile to /etc/apparmor.d")
Signed-off-by: Aleksa Sarai <asarai@suse.de>
Upstream-commit: 567ef8e7858ca4f282f598ba1f5a951cbad39e83
Component: engine
