Public bug reported:
Now that we have support for apparmor namespacing and stacking,
unprivileged containers can and should be allowed to load apparmor
profiles.
The following changes are needed at least:
- Change the systemd unit to remove the "!container" condition
- Change the apparmor init script, replacing the current simple container
check for something along the lines of:
- If /proc/self/attr/current says "unconfined"
- And /sys/kernel/security/apparmor/features/domain/stack contains "yes"
- And /sys/kernel/security/apparmor/features/domain/version is 1.2 or higher
- Then continue execing the script, otherwise exit 0
John suggested he could add a file which would provide a more reliable
way to do this check ^
In either case, we need this change so that containers can behave more like
normal systems as far as apparmor is concerned. That change should also be
SRUed back to Xenial at the same time the kernel support for stacking is pushed.
This bug is effectively a blocker for snapd inside LXD as without this,
snap-confine and snapd itself will not be confined after container
restart.
** Affects: apparmor (Ubuntu)
Importance: High
Status: New
** Tags: lxd
** Changed in: apparmor (Ubuntu)
Importance: Undecided => High
** Tags added: lxd
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https://bugs.launchpad.net/bugs/1628285
Title:
apparmor should be allowed to start in containers
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