Working from feedback on the existing implementation, we have now
introduced a central metadata object to represent the lifecycle and pin
the resources required to implement what people today know as
containers. This includes the runtime specification and the root
filesystem snapshots. We also allow arbitrary labeling of the container.
Such provisions will bring the containerd definition of container closer
to what is expected by users.
The objects that encompass today's ContainerService, centered around the
runtime, will be known as tasks. These tasks take on the existing
lifecycle behavior of containerd's containers, which means that they are
deleted when they exit. Largely, there are no other changes except for
naming.
The `Container` object will operate purely as a metadata object. No
runtime state will be held on `Container`. It only informs the execution
service on what is required for creating tasks and the resources in use
by that container. The resources referenced by that container will be
deleted when the container is deleted, if not in use. In this sense,
users can create, list, label and delete containers in a similar way as
they do with docker today, without the complexity of runtime locks that
plagues current implementations.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
This moves both the Mount type and mountinfo into a single mount
package.
This also opens up the root of the repo to hold the containerd client
implementation.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Update go-runc to 49b2a02ec1ed3e4ae52d30b54a291b75
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Add shim to restore creation
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Keep checkpoint path in service
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Add C/R to non-shim build
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Checkpoint rw and image
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Pause container on bind checkpoints
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Return dump.log in error on checkpoint failure
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Pause container for checkpoint
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Update runc to 639454475cb9c8b861cc599f8bcd5c8c790ae402
For checkpoint into to work you need runc version
639454475cb9c8b861cc599f8bcd5c8c790ae402 + and criu 3.0 as this is what
I have been testing with.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Move restore behind create calls
This remove the restore RPCs in favor of providing the checkpoint
information to the `Create` calls of a container. If provided, the
container will be created/restored from the checkpoint instead of an
existing container.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Regen protos after rebase
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
This updates containerd to use the latest versions of cgroups, fifo,
console, and go-runc from the containerd org.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
