Dockerfile: update to runc v1.2.0-rc.1
release notes: https://github.com/opencontainers/runc/releases/tag/v1.2.0-rc.1
Breaking changes and deprecations are included below;
Breaking changes:
Several aspects of how mount options work has been adjusted in a way that
could theoretically break users that have very strange mount option strings.
This was necessary to fix glaring issues in how mount options were being
treated. The key changes are:
- Mount options on bind-mounts that clear a mount flag are now always
applied. Previously, if a user requested a bind-mount with only clearing
options (such as rw,exec,dev) the options would be ignored and the
original bind-mount options would be set. Unfortunately this also means
that container configurations which specified only clearing mount options
will now actually get what they asked for, which could break existing
containers (though it seems unlikely that a user who requested a specific
mount option would consider it "broken" to get the mount options they
asked foruser who requested a specific mount option would consider it
"broken" to get the mount options they asked for). This also allows us to
silently add locked mount flags the user did not explicitly request to be
cleared in rootless mode, allowing for easier use of bind-mounts for
rootless containers.
- Container configurations using bind-mounts with superblock mount flags
(i.e. filesystem-specific mount flags, referred to as "data" in
mount(2), as opposed to VFS generic mount flags like MS_NODEV) will
now return an error. This is because superblock mount flags will also
affect the host mount (as the superblock is shared when bind-mounting),
which is obviously not acceptable. Previously, these flags were silently
ignored so this change simply tells users that runc cannot fulfil their
request rather than just ignoring it.
Deprecated
- runc option --criu is now ignored (with a warning), and the option will
be removed entirely in a future release. Users who need a non-standard
criu binary should rely on the standard way of looking up binaries in
$PATH.
- runc kill option -a is now deprecated. Previously, it had to be specified
to kill a container (with SIGKILL) which does not have its own private PID
namespace (so that runc would send SIGKILL to all processes). Now, this is
done automatically.
- github.com/opencontainers/runc/libcontainer/user is now deprecated, please
use github.com/moby/sys/user instead. It will be removed in a future
release.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Sebastiaan van Stijn