docker-registry/Dockerfile.template: Launch with 'exec docker-registry'

And modernize the installation and execution:

* Remove setup-configs.sh call, because the script is gone since
  2ee1387a (Clean up configuration management, 2014-05-08).

* Use the setup.py-installed docker-registry endpoint, because run.sh
  is gone since bf3360a2 (replacing run.sh with a "docker-registry"
  console script, 2014-04-02).  Unfortunately, I can't find a way to
  run docker-registry from the source directory (without installing
  it), because Setuptools' pkg_resources seems to need some
  namespace-package *.pth funkyness.  Luckily all this is easier with
  the PEP 420 namespace implementation that landed in Python 3.3.

* Don't pass '--preload' to Gunicorn, because docker_registry.run is
  loading bulk of docker_registry before launching the Gunicorn
  process.  The stack pulling in the initial database-setup is:

    File "/.../docker_registry/run.py", line 23, in <module>
      from .search import *  # noqa
    File "/.../docker_registry/search.py", line 17, in <module>
      INDEX = index.load(cfg.search_backend.lower())
    File "/.../docker_registry/lib/index/__init__.py", line 82, in load
      return db.SQLAlchemyIndex()
    ...

  It seems inefficient to drag all this into the Gunicorn process for
  folks that don't need single-threaded setup, but whatever, it works
  for my use case ;).

diff --git a/docker-registry/Dockerfile.template b/docker-registry/Dockerfile.template
index 5efbe43ade343738f277b0603b3a3231af6a2e09..cbb378879187006e388b4c26c8d854758e8c5e7b 100644 (file)
--- a/docker-registry/Dockerfile.template
+++ b/docker-registry/Dockerfile.template
@@ -35,5 +35,11 @@ RUN eselect news read new
 RUN git clone git://github.com/dotcloud/docker-registry.git
 RUN cp --no-clobber docker-registry/config/config_sample.yml docker-registry/config/config.yml
 
-CMD cd docker-registry && ./setup-configs.sh && ./run.sh --preload
+# Disable strict dependencies (see dotcloud/docker-registry#466)
+RUN sed -i 's/\(install_requires=\)/#\1/' docker-registry/setup.py docker-registry/depends/docker-registry-core/setup.py
+
+RUN cd docker-registry/depends/docker-registry-core/ && python setup.py install
+RUN cd docker-registry && python setup.py install
+
+CMD exec docker-registry
 EXPOSE 5000