We have two test cases with and without pre-dump. Terminals and
pre-dump features are orthogonal, so we can modify one of these test cases.
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
A freezer cgroup allows to dump processes faster.
If a user wants to checkpoint a container and its storage,
he has to pause a container, but in this case we need to pass
a path to its freezer cgroup to "criu dump".
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Currently startContainer() is used to create and to run a container.
In the next patch it will be used to restore a container.
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
vndr doesn't support non-top-level imports, and in addition we really
should be using tagged releases far more than we currently are
(*especially* when it come to the OCI specs).
Signed-off-by: Aleksa Sarai <asarai@suse.de>
When C/R was implemented, it was enough to call manager.Set to apply
limits and to move a task. Now .Set() and .Apply() have to be called
separately.
Fixes: 8a740d5391 ("libcontainer: cgroups: don't Set in Apply")
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Instead of relying on version numbers it is possible to check if CRIU
actually supports certain features. This introduces an initial
implementation to check if CRIU and the underlying kernel actually
support dirty memory tracking for memory pre-dumping.
Upstream CRIU also supports the lazy-page migration feature check and
additional feature checks can be included in CRIU to reduce the version
number parsing. There are also certain CRIU features which depend on one
side on the CRIU version but also require certain kernel versions to
actually work. CRIU knows if it can do certain things on the kernel it
is running on and using the feature check RPC interface makes it easier
for runc to decide if the criu+kernel combination will support that
feature.
Feature checking was introduced with CRIU 1.8. Running with older CRIU
versions will ignore the feature check functionality and behave just
like it used to.
v2:
- Do not use reflection to compare requested and responded
features. Checking which feature is available is now hardcoded
and needs to be adapted for every new feature check. The code
is now much more readable and simpler.
v3:
- Move the variable criuFeat out of the linuxContainer struct,
as it is not container specific. Now it is a global variable.
Signed-off-by: Adrian Reber <areber@redhat.com>
The original implementation is in C, which increases cognitive load and
possibly might cause us problems in the future. Since sys/unix is better
maintained than the syscall standard library switching makes more sense.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
It turns out that the standard "syscall" library is not recommended for
new programs. runC will need to eventually move to this, but for now
include it in vendor so we can use it for new features.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
Michael Crosby
CuiHaozhi
Harshal Patil
Mrunal Patel
Andrei Vagin
Aleksa Sarai
Kenfe-Mickael Laventure
Jonh Wendell
Qiang Huang
Tim Potter
chchliang
Daniel, Dao Quang Minh
Christy Perez
Adrian Reber
Derek Carr