Merge pull request #662 from dmcgowan/dev-report-3-24

Add development report for Mar 24 2017

reports/2017-03-24.md

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+# Development Report for Mar 24, 2017
+
+## Container Level Metrics
+
+* https://github.com/docker/containerd/pull/646
+
+We merged a PR to add our first pass of container level metrics to our
+prometheus output in containerd. We still have to review the metric names and
+structure before having something we are all comfortable supporting in the long
+run but we now have comprehensive metrics for all containers running on
+containerd.
+
+## Distribution
+
+After hitting a major milestone of getting a proof of concept for end to end
+pull and run, this week the focus was on getting that code in the right place
+and figure out where the implementation gaps are.
+
+### Image to OCI Spec
+
+* https://github.com/docker/containerd/pull/660
+
+We merged support for getting an image config that was pulled off of a registry
+and generating a spec based on the image properties in the `ctr` command.  This
+will let you pull images off of a registry and run them based on the config and
+how the image was built.
+
+Its very simple at the moment but will will be porting over the default spec
+and generation code from Docker soon into a package that can be easily consumed
+by clients of containerd.
+
+You can test this by running:
+
+```console
+bash
+sudo dist pull docker.io/library/redis:alpine
+sudo ctr run --id redis -t docker.io/library/redis:alpine
+```
+
+### Image handlers
+
+* https://github.com/docker/containerd/pull/638
+
+We refactored the fetch command into a more generic image handler interface. As
+we look forward to supporting the full oci image spec as well as the Docker
+distribution specifications, we are removing any opinionated code to make
+distribution as generalized and efficient as possible.
+
+### Image listing now with full image size
+
+```console
+$ dist images
+REF                                    TYPE                                                 DIGEST                                                                  SIZE     
+docker.io/library/redis:latest         application/vnd.docker.distribution.manifest.v2+json sha256:1b358a2b0dc2629af3ed75737e2f07e5b3408eabf76a8fa99606ec0c276a93f8 71.0 MiB
+```
+
+## Snapshot driver improvements
+
+* https://github.com/docker/containerd/pull/635
+
+The `overlay` and `btrfs` driver implementations are now fully implemented and
+share an implementation for metadata storage. This new metadata storage package
+allows not only making snapshot drivers easier, but allow us to focus on making
+our existing drivers more resilient and stable once.