I noticed that confinement inside of LXD containers works fine when
shiftfs is disabled:
$ sudo rmmod shiftfs
$ sudo mv /lib/modules/5.0.0-11-generic/kernel/fs/shiftfs.ko .
$ sudo systemctl restart snap.lxd.daemon
$ lxc launch ubuntu-daily:d noshift
Creating noshift
Starting noshift
# Now log in to the container and fix the apparmor init script bug
# around SFS_MOUNTPOINT by modifying /lib/apparmor/rc.apparmor.functions
# to define SFS_MOUNTPOINT="${SECURITYFS}/${MODULE}" at the top of
# is_container_with_internal_policy()
$ lxc exec noshift -- sh -x /lib/apparmor/apparmor.systemd reload
$ lxc exec noshift -- aa-status
apparmor module is loaded.
27 profiles are loaded.
27 profiles are in enforce mode.
/sbin/dhclient
/snap/core/6673/usr/lib/snapd/snap-confine
/snap/core/6673/usr/lib/snapd/snap-confine//mount-namespace-capture-helper
/usr/bin/man
/usr/lib/NetworkManager/nm-dhcp-client.action
/usr/lib/NetworkManager/nm-dhcp-helper
/usr/lib/connman/scripts/dhclient-script
/usr/lib/snapd/snap-confine
/usr/lib/snapd/snap-confine//mount-namespace-capture-helper
/usr/sbin/tcpdump
man_filter
man_groff
nvidia_modprobe
nvidia_modprobe//kmod
snap-update-ns.core
snap-update-ns.lxd
snap.core.hook.configure
snap.lxd.activate
snap.lxd.benchmark
snap.lxd.buginfo
snap.lxd.check-kernel
snap.lxd.daemon
snap.lxd.hook.configure
snap.lxd.hook.install
snap.lxd.lxc
snap.lxd.lxd
snap.lxd.migrate
0 profiles are in complain mode.
0 processes have profiles defined.
0 processes are in enforce mode.
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.
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https://bugs.launchpad.net/bugs/1824812
Title:
apparmor does not start in Disco LXD containers
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