When using `--frontend=gateway.v0` in order to use a tagged image as the
frontend it is currently required to push the tag to a registry, so that
buildkit can pull it. One can use the `image@sha256:digest` form but this is
inconvenient for the development cycle.
Instead, introduce a proxy `Resolver` which if the pull fails checks the local
image store (if there is one, which is worker dependent) for a suitable image
and if so uses that.
With this I can now:
buildctl build --frontend=dockerfile.v0 --local context=. --local dockerfile=. --exporter=image --exporter-opt=name=docker.io/ijc25/fe:dev
builtctl build --frontend=gateway.v0 --frontend-opt=source=ijc25/fe:dev --exporter=image --exporter-opt=name=hello-world:dev
Without any push to a registry.
I am using the containerd worker.
Signed-off-by: Ian Campbell <ijc@docker.com>
Tonis Tiigi
Jess Frazelle
Ian Campbell
Akihiro Suda