With this changeset we introduce several new things. The first is the
top-level dist command. This is a toolkit that implements various
distribution primitives, such as fetching, unpacking and ingesting.
The first component to this is a simple `fetch` command. It is a
low-level command that takes a "remote", identified by a `locator`, and
an object identifier. Keyed by the locator, this tool can identify a
remote implementation to fetch the content and write it back to standard
out. By allowing this to be the unit of pluggability in fetching
content, we can have quite a bit of flexibility in how we retrieve
images.
The current `fetch` implementation provides anonymous access to docker
hub images, through the namespace `docker.io`. As an example, one can
fetch the manifest for `redis` with the following command:
```
$ ./dist fetch docker.io/library/redis latest mediatype:application/vnd.docker.distribution.manifest.v2+json
```
Note that we have provided a mediatype "hint", nudging the fetch
implementation to grab the correct endpoint. We can hash the output of
that to fetch the same content by digest:
```
$ ./dist fetch docker.io/library/redis sha256:$(./dist fetch docker.io/library/redis latest mediatype:application/vnd.docker.distribution.manifest.v2+json | shasum -a256)
```
Note that the hint is now elided, since we have affixed the content to a
particular hash.
If you are not yet entertained, let's bring `jq` and `xargs` into the
mix for maximum fun. The following incantation fetches the same manifest
and downloads all layers into the convenience of `/dev/null`:
```
$ ./dist fetch docker.io/library/redis sha256:a027a470aa2b9b41cc2539847a97b8a14794ebd0a4c7c5d64e390df6bde56c73 | jq -r '.layers[] | .digest' | xargs -n1 -P10 ./dist fetch docker.io/library/redis > /dev/null
```
This is just the beginning. We should be able to centralize
configuration around fetch to implement a number of distribution
methodologies that have been challenging or impossible up to this point.
The `locator`, mentioned earlier, is a schemaless URL that provides a
host and path that can be used to resolve the remote. By dispatching on
this common identifier, we should be able to support almost any protocol
and discovery mechanism imaginable.
When this is more solidified, we can roll these up into higher-level
operations that can be orchestrated through the `dist` tool or via GRPC.
What a time to be alive!
Signed-off-by: Stephen J Day <stephen.day@docker.com>
github.com/docker/docker/pkg/archive requires Sirupsen/logrus.
So let's remove sirupsen/logrus at the moment.
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
Initial vendor list validated with empty $GOPATH
and only master checked out; followed by `make`
and verified that all binaries build properly.
Updates require github.com/LK4D4/vndr tool.
Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com>
The currently used go-grpc client is rather old (a commit from May).
Since then a GA release has been cut, so let's use that.
Signed-off-by: Mike Danese <mikedanese@google.com>
* Vendor in runc afaa21f79ade3b2e99a68f3f15e7219155aa4662
This updates the Dockerfile to use go 1.6.2 and install pkg-config are
both are now needed by runc.
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
* Add support for runc create/start operation
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
* Remove dependency on runc state directory for OOM handler
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
* Add OOM test
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
* containerd build clean on Solaris
Signed-off-by: Amit Krishnan <krish.amit@gmail.com>
* Vendor golang.org/x/sys
Signed-off-by: Amit Krishnan <krish.amit@gmail.com>
* Update grpc and protobufs dep
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
* Fix grpc error check
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
Since we're using the docker "library" for socket activation (and
dealing with sockets in general), we need to vendor the requirements for
the library. Also, include go-winio even though Windows isn't a
supported target at the moment.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
This ensure that users can reproduce a containerd build exactly as it
was done during release.
Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
