Koji Content Generator Metadata

This document describes the Koji Content Generator Metadata Format (version 0). This is the metadata that should be provided by a Content Generator in order for the content to be imported and managed by Koji. If you have further questions about Content Generators, please email koji-devel@lists.fedorahosted.org.

Format

Content Generator Metadata for a single build is provided as a JSON map. The map has four top-level entries:

  • metadata_version: The version of the metadata format used. Currently must be 0.
  • build: A map containing information about the build.
  • buildroots: A list of maps, one for each environment in which build output was generated, containing information about that environment.
  • output: A list of maps, one map for each file that will be imported and managed by Koji.

metadata_version

This is an integer which indicates the version of the metadata format contained in this file. It will start at 0 and be incremented as the metadata format evolves.

build

The build map contains the following entries:

  • name: The name of the build.
  • version: The version of the build.
  • release: The release of the build.
  • source: The SCM URL of the sources used in the build.
  • start_time: The time the build started, in seconds since the epoch.
  • end_time: The time the build was completed, in seconds since the epoch.
  • owner: The owner of the build task in username format. This field is optional.
  • extra: A map of extra metadata associated with the build, which must include one of:
    • typeinfo: A map whose single entry is the name of the content generator type, which is a map containing type-specific information for this build.
    • maven, win, or image: Legacy content generator type names which appear at this level instead of inside typeinfo.

buildroots

Each map in the buildroots list contains the following entries:

  • id: An id for this buildroot entry. Only needs to be consistent within this file (it will be referenced by the output). Can be synthetic/generated/random.
  • host: Map containing information about the host where the build was run.
    • os: The operating system that was running on the host.
    • arch: The processor architecture of the host.
  • content_generator: Map containing information about the Content Generator which ran the build.
    • name: The short name of the Content Generator.
    • version: The version of the Content Generator.
  • container: Map containing information about the container in which the build was run.
    • type: The type of container that was used, eg. none, directory, chroot, mock-chroot, kvm, docker
    • arch: The architecture of the container. May be different than the architecture of the host, eg. i686 container on x86_64 host.
  • tools: List of maps containing information about the tools used to run the build. Each map contains:
    • name: Name of the tool used.
    • version: Version of the tool used.
  • components: List of maps containing information about content installed in the build environment (if any). Each map is guaranteed to contain a type field, which determines what other fields are present in the map. For maps where type = rpm, the following fields will be present:
    • name: The rpm name.
    • version: The rpm version.
    • release: The rpm release.
    • epoch: The rpm epoch.
    • arch: The rpm arch.
    • sigmd5: The SIGMD5 tag from the rpm header.
    • signature: The signature used to sign the rpm (if any).
  • For maps where type = file, the following fields will be present:
    • filename: The name of the file.
    • filesize: The size of the file.
    • checksum: The checksum of the file.
    • checksum_type: The checksum type used.
  • For maps where type = kojifile, the following fields will be present:
    • filename: The name of the file.
    • filesize: The size of the file.
    • checksum: The checksum of the file.
    • checksum_type: The checksum type used.
    • nvr: Build nvr from which this file origins.
    • archive_id: ID of archive from specified build.
  • The format may be extended with other types in the future.
  • extra: A map containing information specific to the Content Generator that produced the files to import. For OSBS, the extra map should contain a osbs entry, which is a map with the following fields:
    • build_id: The ID of the build in OSBS.
    • builder_image_id: The ID of the image in OSBS that was used to run the build.

output

Each map in the output list contains the following entries:

  • buildroot_id: The id of the buildroot used to create this file. Must match an entry in the buildroots list.
  • filename: The name of the file.
  • filesize: The size of the file.
  • arch: The architecture of the file (if applicable).
  • checksum: The checksum of the file.
  • checksum_type: The checksum type used.
  • type: The type of the file. Log files should use “log”.
  • components: If the output file is composed from other units, those should be listed here. The format is the same as the components field of a buildroot map.
  • extra: Free-form, but should contain IDs that allow tracking the output back to the system in which it was generated (if that system retains a record of output). For docker, the extra map should contain a docker entry, which is a map with the following fields:
    • id: The ID of the docker image produced in the repo used by the build tool
    • parent_id: The parent ID of the docker image produced (if applicable).
    • repositories: A list of repository locations where the image is available.
    • digests: A map of media type (such as “application/vnd.docker.distribution.manifest.v2+json”) to manifest digest (a string usually starting “sha256:”), for each available media type.

Example Metadata JSON

The below JSON is based loosely on the output of a docker image build.

{"metadata_version": 0,
 "build": {"name": "rhel-server-docker",
           "version": "7.1",
           "release": "4",
           "source": "git://git.engineering.redhat.com/users/vpavlin/tdl_templates.git#a14f145244",
           "extra": {},
           "start_time": 1423148398,
           "end_time": 1423148828,
           "owner": "jdoe"},
 "buildroots": [{"id": 1,
                 "host": {"os": "rhel-7",
                          "arch": "x86_64"},
                 "content_generator": {"name": "osbs",
                                       "version": "0.2"},
                 "container": {"type": "docker",
                               "arch": "x86_64"},
                 "tools": [{"name": "docker",
                            "version": "1.5.0"}],
                 "components": [{"type": "rpm",
                                 "name": "glibc",
                                 "version": "2.17",
                                 "release": "75.el7",
                                 "epoch": null,
                                 "arch": "x86_64",
                                 "sigmd5": "a1b2c3...",
                                 "signature": "fd431d51"},
                                {"type": "rpm",
                                 "name": "openssl",
                                 "version": "1.0.1e",
                                 "release": "42.el7",
                                 "epoch": null,
                                 "arch": "x86_64",
                                 "sigmd5": "d4e5f6...",
                                 "signature": "fd431d51"},
                                {"type": "rpm",
                                 "name": "bind-libs",
                                 "version": "9.9.4",
                                 "release": "18.el7",
                                 "epoch": 32,
                                 "arch": "x86_64",
                                 "sigmd5": "987abc...",
                                 "signature": null},
                                {"type": "rpm",
                                 "name": "python-urllib3",
                                 "version": "1.5",
                                 "release": "8.el7",
                                 "epoch": null,
                                 "arch": "noarch",
                                 "sigmd5": "123hgf...",
                                 "signature": null},
                                {"type": "file",
                                 "filename": "jboss-eap-6.3.3-full-build.zip",
                                 "filesize": 12345678,
                                 "checksum": "5ec2f29c4e1c2e2aa6552836e236a158",
                                 "checksum_type": "md5"}],
                 "extra": {"osbs": {"build_id": 12345,
                                    "builder_image_id": 67890}}
                 }],
 "output": [{"buildroot_id": 1,
            "filename": "rhel-server-docker-7.1-4.x86_64.tar.xz",
            "filesize": 34440656,
            "arch": "x86_64",
            "checksum_type": "md5",
            "checksum": "275ae42a45cfedbdb0c0a1acc0b55a1b",
            "type": "docker-image",
            "components": "",
            "extra": {"docker": {"id": "987654...",
                                 "parent_id": "a1b2c3...",
                                 "repositories": ["repository.example.com/username/imagename:7.1-4",
                                                  "repository.example.com/username/imagename@sha256:100000...",
                                                  "repository.example.com/username/imagename@sha256:200000..."],
                                 "digests": {"application/vnd.docker.distribution.manifest.v1+json": "sha256:100000...",
                                             "application/vnd.docker.distribution.manifest.v2+json": "sha256:200000..."}
                                 }}},
           {"buildroot_id": 1,
            "filename": "checkout.log",
            "filesize": 85724,
            "arch": "noarch",
            "checksum_type": "md5",
            "checksum": "a1b2c3...",
            "type": "log"},
           {"buildroot_id": 1,
            "filename": "os-indirection.log",
            "filesize": 27189,
            "arch": "noarch",
            "checksum_type": "md5",
            "checksum": "d4f5g6...",
            "type": "log"}
           ]
}