github.com/containerd/containerd@v22.0.0-20200918172823-438c87b8e050+incompatible/reports/2017-03-24.md (about)

     1  # Development Report for Mar 24, 2017
     2  
     3  ## Container Level Metrics
     4  
     5  * https://github.com/containerd/containerd/pull/646
     6  
     7  We merged a PR to add our first pass of container level metrics to our
     8  prometheus output in containerd. We still have to review the metric names and
     9  structure before having something we are all comfortable supporting in the long
    10  run but we now have comprehensive metrics for all containers running on
    11  containerd.
    12  
    13  ## Distribution
    14  
    15  After hitting a major milestone of getting a proof of concept for end to end
    16  pull and run, this week the focus was on getting that code in the right place
    17  and figure out where the implementation gaps are.
    18  
    19  ### Image to OCI Spec
    20  
    21  * https://github.com/containerd/containerd/pull/660
    22  
    23  We merged support for getting an image config that was pulled off of a registry
    24  and generating a spec based on the image properties in the `ctr` command.  This
    25  will let you pull images off of a registry and run them based on the config and
    26  how the image was built.
    27  
    28  Its very simple at the moment but will will be porting over the default spec
    29  and generation code from Docker soon into a package that can be easily consumed
    30  by clients of containerd.
    31  
    32  You can test this by running:
    33  
    34  ```console
    35  bash
    36  sudo dist pull docker.io/library/redis:alpine
    37  sudo ctr run --id redis -t docker.io/library/redis:alpine
    38  ```
    39  
    40  ### Image handlers
    41  
    42  * https://github.com/containerd/containerd/pull/638
    43  
    44  We refactored the fetch command into a more generic image handler interface. As
    45  we look forward to supporting the full oci image spec as well as the Docker
    46  distribution specifications, we are removing any opinionated code to make
    47  distribution as generalized and efficient as possible.
    48  
    49  ### Image listing now with full image size
    50  
    51  ```console
    52  $ dist images
    53  REF                                    TYPE                                                 DIGEST                                                                  SIZE     
    54  docker.io/library/redis:latest         application/vnd.docker.distribution.manifest.v2+json sha256:1b358a2b0dc2629af3ed75737e2f07e5b3408eabf76a8fa99606ec0c276a93f8 71.0 MiB
    55  ```
    56  
    57  ## Snapshot driver improvements
    58  
    59  * https://github.com/containerd/containerd/pull/635
    60  
    61  The `overlay` and `btrfs` driver implementations are now fully implemented and
    62  share an implementation for metadata storage. This new metadata storage package
    63  allows not only making snapshot drivers easier, but allow us to focus on making
    64  our existing drivers more resilient and stable once.