This adds null IO option for efficient handling of IO.
It provides a container directly with `/dev/null` and does not require
any io.Copy within the shim whenever a user does not want the IO of the
container.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
This could render tasks for a container unresolvalbe. If there is a use
case for changing the runtime of a container, we should think it through
carefully.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
This is needed to support daemon restart as the unix socket is recreated at
every start.
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
Define the release process for containerd and outline the components
that are and are not covered by versioning guarantees. Please read the
document for details.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
Because runc will delete a container after a successful checkpoint we
need to handle a NotFound error from runc on delete.
There is also a race between SIGKILL'ing the shim and it actually
exiting to unmount the tasks rootfs, we need to loop and wait for the
task to actually be reaped before trying to delete the rootfs+bundle.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
This adds a `stress` binary to help stress test containerd. It is
different from a benchmarking tool as it only gives a simple summary at
the end.
It is built to run long, multi hour/day stress tests across builds of
containerd.
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
By moving the binaries to be rooted at `bin/` in the tar file,
installation can be done from a tar file in one fell swoop:
```console
$ make release
$ sudo tar -C /usr/local -xvf releases/containerd-1.0.0-alpha3-72-ge6ba48f2.m.linux-amd64.tar.gz
```
Signed-off-by: Stephen J Day <stephen.day@docker.com>
The argument order, naming and behavior of the snapshots command didn't
really follow any of the design constraints or conventions of the
`Snapshotter` interface. This brings the command into line with that
interface definition.
The `snapshot archive` command has been removed as it requires more
thought on design to correctly emit diffs.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
After some analysis, it was found that Content.Reader was generally
redudant to an io.ReaderAt. This change removes `Content.Reader` in
favor of a `Content.ReaderAt`. In general, `ReaderAt` can perform better
over interfaces with indeterminant latency because it avoids remote
state for reads. Where a reader is required, a helper is provided to
convert it into an `io.SectionReader`.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
