The Docker container with Grafeas server (us.gcr.io/grafeas/grafeas-server:0.1.0) is public;
Grafeas server can be deployed on Kubernetes: see Helm instructions;
Grafeas server can be brought up with PostgreSQL storage backend (see grafeas-pgsql);
Basic support for Go client library (link) is available;
Fallback policy in Kritis admissions is accept-all.