Add org.opencontainers.image.* labels to Dockerfiles

[marccarre]

Why? What?

• This should ultimately help for image-to-code back references.
• org.label-schema.* labels are now deprecated, in favour of org.opencontainers.image.* labels.
  See also: https://github.com/opencontainers/image-spec/blob/master/annotations.md#back-compatibility-with-label-schema
• Git revision is now injected at docker build time.

Testing

$ docker inspect weaveworks/weave
[
    {
        [...]
        "ContainerConfig": {
            [...]
            "Labels": {
                "maintainer": "Weaveworks <help@weave.works>",
                "org.label-schema.description": "Weave Net creates a virtual network that connects Docker containers across multiple hosts and enables their automatic discovery",
                "org.label-schema.name": "Weave Net",
                "org.label-schema.schema-version": "1.0",
                "org.label-schema.url": "https://weave.works",
                "org.label-schema.vcs-ref": "9f207f161a160e1f09f472015c346976547a0dc7",
                "org.label-schema.vcs-url": "https://github.com/weaveworks/weave",
                "org.label-schema.vendor": "Weaveworks",
                "org.opencontainers.image.description": "Weave Net creates a virtual network that connects Docker containers across multiple hosts and enables their automatic discovery",
                "org.opencontainers.image.revision": "9f207f161a160e1f09f472015c346976547a0dc7",
                "org.opencontainers.image.source": "https://github.com/weaveworks/weave",
                "org.opencontainers.image.title": "Weave Net",
                "org.opencontainers.image.url": "https://weave.works",
                "org.opencontainers.image.vendor": "Weaveworks",
                "works.weave.role": "system"
            }
[...]

$ docker inspect weaveworks/weave-kube
[
    {
        [...]
        "ContainerConfig": {
            [...]
            "Labels": {
                "maintainer": "Weaveworks <help@weave.works>",
                "org.label-schema.description": "Weave Net creates a virtual network that connects Docker containers across multiple hosts and enables their automatic discovery",
                "org.label-schema.name": "Weave Net",
                "org.label-schema.schema-version": "1.0",
                "org.label-schema.url": "https://weave.works",
                "org.label-schema.vcs-ref": "9f207f161a160e1f09f472015c346976547a0dc7",
                "org.label-schema.vcs-url": "https://github.com/weaveworks/weave",
                "org.label-schema.vendor": "Weaveworks",
                "org.opencontainers.image.description": "Weave Net creates a virtual network that connects Docker containers across multiple hosts and enables their automatic discovery",
                "org.opencontainers.image.revision": "9f207f161a160e1f09f472015c346976547a0dc7",
                "org.opencontainers.image.source": "https://github.com/weaveworks/weave",
                "org.opencontainers.image.title": "weave-kube",
                "org.opencontainers.image.url": "https://weave.works",
                "org.opencontainers.image.vendor": "Weaveworks",
                "works.weave.role": "system"
            }
[...]

[leth]

👍