Re: [PATCH v5 0/4] Add support for containerized root filesystems

[Jan Kiszka <jan.kiszka@siemens.com>]

On 15.02.21 14:39, [ext] Silvano Cirujano Cuesta wrote:
> This patch series provides support for containerized root filesystems,
> for both target images and SDKs.
> 
> For containerized target images the new image type `container-img` has
> been added.
> 
> For containerized SDKs the task `populate_sdk` has been extended.
> 
> Containerized root filesystems are easy to distribute and run, enabling
> this way following scenarios:
>  - Use ISAR to build container images meant to be run only in containers.
>  - Use the same ISAR configuration to build images for containers, VMs
>    and bare-metal.
>  - Easy SDK distribution and "installation".
>  - Quickly testing certain applications in the workstation using the
>    target root filesystem.
> 
> In order to build containerized target root filesystems `IMAGE_TYPE` has
> to be `container-img`, additionally the container image format can be
> selected with the variable `CONTAINER_FORMATS`. The default format is
> `docker-archive`.
> 
> In order to build containerized SDKs the variable `SDK_FORMAT` has to
> provide any of the supported container formats (e.g. `docker-archive`).
> The default format is the legacy non-containerized: `tar_xz`.
> 
> More information about its usage is documented in the file
> docs/user_manual.md.
> 
> A PoC/demo of this functionality (only the SDK part) has been created
> based on the project https://github.com/siemens/meta-iot2050.
> Jan Kiszka already tested and liked it! =>
> https://github.com/siemens/meta-iot2050/issues/86#issuecomment-768907845
> 
> Successful builds of both containerized target and SDK are available on
> the same PoC project:
>  - https://github.com/Silvanoc/meta-iot2050/actions/runs/558311580
>  - https://github.com/Silvanoc/meta-iot2050/actions/runs/558311581
> and also the resulting images:
>  - https://github.com/users/Silvanoc/packages/container/package/meta-iot2050%2Fiot2050-debian-arm64
>  - https://github.com/users/Silvanoc/packages/container/package/meta-iot2050%2Fiot2050-debian-sdk-arm64
> 
> In order to get a feeling about its usage (you need Docker or Podman),
> follow these simple copy&paste instructions:
> https://github.com/Silvanoc/meta-iot2050/blob/master/kas/BUILDING-SDK-CONTAINER.md#running-the-sdk
> Build instructions are available in the upper part of that document.
> 
> Two new dependencies are required to create containerized root
> filesystems (as specified in the documentation).
> 
> Typical container image management actions (e.g. push an image to a
> container image regitry) are out of scope. Available tools (Docker,
> Skopeo, Buildah, Podman,...) should be used for these actions.
> 
> A patch will follow this one to get the dependencies into the container
> images being provided by the project
> https://github.com/siemens/kas (for `kas-container`, for example).
> 
> Silvano Cirujano Cuesta (4):
>   classes: add root filesystem containerizing class
>   classes: add new image type 'container-img'
>   sdk: add support for containerized sdk
>   docs: document creation of container images
> 
>  doc/user_manual.md                            | 127 ++++++++++++++++++
>  meta/classes/container-img.bbclass            |  18 +++
>  .../classes/image-container-extension.bbclass |  79 +++++++++++
>  meta/classes/image-sdk-extension.bbclass      |  42 +++++-
>  meta/classes/image.bbclass                    |   1 +
>  5 files changed, 260 insertions(+), 7 deletions(-)
>  create mode 100644 meta/classes/container-img.bbclass
>  create mode 100644 meta/classes/image-container-extension.bbclass
> 

Looks good to me.

Jan

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