docker images no longer signed/verifiable

[lmgray]

It seems recent images available in docker.io are not being signed as they had been in the past:

$ export DOCKER_CONTENT_TRUST=1

$ docker pull fluent/fluentd:v0.12.43-2.0
Error: remote trust data does not exist for docker.io/fluent/fluentd: notary.docker.io does not have trust data for docker.io/fluent/fluentd

$ docker pull fluent/fluentd:v0.12-2
Error: remote trust data does not exist for docker.io/fluent/fluentd: notary.docker.io does not have trust data for docker.io/fluent/fluentd

In the past, e.g. `latest` was signed.  Is this an oversight?  Are any signed/verifiable images available or planned?

[kenhys]

We can't provide signed image under current workflow.

https://docs.docker.com/engine/security/trust/