Serve a TLS endpoint if REGISTRY_TLS_VERIFY is set and GUNICORN_OPTS is not #693

tiborvass · 2014-11-07T00:45:54Z

If REGISTRY_TLS_VERIFY is set, but GUNICORN_OPTS is not, then serve via a TLS endpoint instead of plain HTTP.

This is done by setting GUNICORN_OPTS to some default value, expecting the following files to be present:

/ssl/ca.crt
/ssl/registry.cert
/ssl/registry.key

Signed-off-by: Tibor Vass teabee89@gmail.com

tiborvass · 2014-11-07T00:46:38Z

Ping @dmp42 @dmcgowan @proppy

tianon · 2014-11-07T01:11:20Z

Dockerfile

@@ -12,6 +12,7 @@ FROM ubuntu:14.04
 RUN apt-get update \
 # Install pip
    && apt-get install -y \
+	curl \


lol indentation

proppy · 2014-11-07T01:11:26Z

~~wondering if @dmp42 would have preferred a python impl and keep the ENTRYPOINT intact.~~

tianon · 2014-11-07T01:11:41Z

Dockerfile

@@ -19,6 +20,10 @@ RUN apt-get update \
        libevent1-dev \
    && rm -rf /var/lib/apt/lists/*

+# get generate_cert
+RUN curl -L -o $ROOTFS/usr/local/bin/generate_cert https://github.com/SvenDowideit/generate_cert/releases/download/0.1/generate_cert-0.1-linux-amd64/ && \


$ROOTFS? Someone copy-pasta'd too much. 😉

tianon · 2014-11-07T01:17:15Z

Dockerfile

@@ -37,4 +42,4 @@ ENV SETTINGS_FLAVOR dev

 EXPOSE 5000

-CMD ["docker-registry"]
+CMD ["/docker-registry/run.sh"]


You mean:

ENTRYPOINT ["/docker-registry/run.sh"] CMD ["docker-registry"]

So it might be good to rename run.sh now to be less misleading. 😉

tianon · 2014-11-07T01:28:33Z

Dockerfile

@@ -19,6 +20,10 @@ RUN apt-get update \
        libevent1-dev \
    && rm -rf /var/lib/apt/lists/*

+# get generate_cert
+RUN curl -L -o /usr/local/bin/generate_cert https://github.com/SvenDowideit/generate_cert/releases/download/0.1/generate_cert-0.1-linux-amd64/ && \


It's not a script; it's a compiled Go binary.

@dmp42 we can rewrite it in bash if you want with openssl, will take some time though.

wonder if we should keep the ENTRYPOINT in python and push the extra logic about in-place cert generation to generate_certs

proppy · 2014-11-07T17:53:13Z

wrap.sh

+esac
+
+x=0
+for f in /ssl/registry.{key,crt}; do


I wonder if we should assume that it's named registry.* or just assumed they get passed as their own bind mount?

tiborvass · 2014-11-07T22:59:57Z

@dmp42 @proppy @ewindisch
Generation of certs are done outside the registry and should be provided under /ssl via --volumes-from or a bind mount. The actual process for users will be documented (in a separate PR + PR to docker/docker/docs ?) from cert generation to including it in the registry container. An additional quick hack could be suggested with something like $(docker run tiborvass/registry:autotls) that would work for the basic needs.

This is done by setting GUNICORN_OPTS to some default value, expecting the following files to be present: * /ssl/ca.crt * /ssl/registry.cert * /ssl/registry.key Signed-off-by: Tibor Vass <teabee89@gmail.com>

dmp42 · 2014-11-11T00:01:54Z

@wking @stevvooe @bacongobbler what do you think?

wking · 2014-11-11T00:06:42Z

On Mon, Nov 10, 2014 at 04:01:55PM -0800, Olivier Gambier wrote:

@wking @stevvooe @bacongobbler what do you think?

I'd just add this to the docs for:

GUNICORN_OPTS='[--ssl-version, 3, --certfile, /ssl/registry.cert, --keyfile, /ssl/registry.keys, --ca-certs, /ssl/ca.crt]'

but if folks want a shortcut environment variable for that, I'll go
along with it ;).

bacongobbler · 2014-11-11T00:32:26Z

LGTM and +1 on separation of concerns, though users would probably like to have /ssl configurable in case their certs are in another container or are located somewhere else on the local filesystem (--volumes-from doesn't allow you to choose the src and dest directories IIRC). Maybe $REGISTRY_KEYFILE, $REGISTRY_CERTFILE AND $REGISTRY_CA_CERTFILE?

e.g. I usually like to have my certs located at /etc/ssl/certs/..., keys in /etc/ssl/private/... and the CA cert chain at /etc/ssl/root.ca

wking · 2014-11-11T00:50:30Z

On Mon, Nov 10, 2014 at 04:32:28PM -0800, Matthew Fisher wrote:

… though users would probably like to have /ssl configurable…

In this case I'd really rather they just used GUNICORN_OPTS directly.
You don't save much by replacing --certfile with REGISTRY_CERTFILE ;).

tiborvass · 2014-11-11T01:33:16Z

@bacongobbler @wking thanks for chiming in!

This is a PR to facilitate TLS for registry users. I agree that we should document GUNICORN_OPTS, but mounting certs to /ssl seems to me a more user-friendly API. If people want to customize anything, they can do so with GUNICORN_OPTS.

We could debate having REGISTRY_TLS_VERIFY. It's explicit, but can also be redundant with just checking the existence of an /ssl directory.

Usage: docker run -d -p 5000:5000 -v /my/ssl:/ssl registry

wking · 2014-11-11T02:39:14Z

On Mon, Nov 10, 2014 at 05:33:17PM -0800, Tibor Vass wrote:

We could debate having REGISTRY_TLS_VERIFY. It's explicit, but can
also be redundant with just checking the existence of an /ssl
directory.

That works for me too, as does encouraging folks to terminate their
SSL/TLS in a reverse-proxy in front of the registry. I think that all
of these options (or whichever ones get implemented or are external)
should get documented in the SSL/TLS section of ADVANCED.md, or in a
document linked from there. I think the main problem is informing the
sysadmin, not saving them keystrokes while they write up their
configuration ;).

tiborvass · 2014-11-11T02:48:42Z

@wking The goal is to have simple TLS instructions on README.md. We could add a link saying for production configuration, the recommended way is to use a reverse-proxy as described in ADVANCED.md. What do you think?

wking · 2014-11-11T03:15:52Z

On Mon, Nov 10, 2014 at 06:48:44PM -0800, Tibor Vass wrote:

The goal is to have simple TLS instructions on README.md.

I'd just say:

The registry uses Gunicorn to manage workers. If you want to setup
SSL/TLS, you can use any of the usual Gunicorn
options via GUNICORN_OPTS. For example:

GUNICORN_OPTS='[--ssl-version, 3, --certfile, /ssl/registry.cert, --keyfile, /ssl/registry.keys, --ca-certs, /ssl/ca.crt]'

That should be enough of a sketch for folks who are already familiar
with SSL/TLS, and it offloads the detailed docs to Gunicorn (which is
appropriate, since it's a Gunicorn feature).

for production configuration, the recommended way is to use a reverse-proxy as described in ADVANCED.md

I'm not sure its the recommended way, but it's certainly one way you
could do this. It sounds like we also want a mini-tutorial in
maintaining client-side root CAs 1, so I'd just stick a more
in-depth SSL/TLS dive somewhere outside the README where we could go
over this in a bit more detail.

stevvooe · 2014-12-30T22:02:00Z

docker_registry/run.py

+    if not gunicorn_opts and env.source('REGISTRY_TLS_VERIFY'):
+        gunicorn_opts = ['--ssl-version', ssl.PROTOCOL_TLSv1]
+        for k, v in {
+            '--certfile': '/ssl/registry.cert',


I don't see the benefit of enforcing these non-standard, default directory paths when simply adding them to GUNICORN_OPTS would suffice and actually provides more flexibility. Otherwise, I'd say make an environment variable for each path.

the same discussion was posted above: #693 (comment)

Apologies for the repetition. Let's figure out whether or not we want to break these out so this PR can get merged.

tiborvass force-pushed the tls-registry branch 3 times, most recently from 5215470 to ce54641 Compare November 7, 2014 01:10

tianon reviewed Nov 7, 2014
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Dockerfile

@@ -12,6 +12,7 @@ FROM ubuntu:14.04

RUN apt-get update \

# Install pip

&& apt-get install -y \

curl \

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tianon Nov 7, 2014

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lol indentation

tianon reviewed Nov 7, 2014
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tiborvass force-pushed the tls-registry branch 2 times, most recently from 3848eb9 to a7a1a04 Compare November 7, 2014 01:15

tianon reviewed Nov 7, 2014
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tiborvass force-pushed the tls-registry branch 2 times, most recently from 8e1f742 to 5890418 Compare November 7, 2014 01:26

tianon reviewed Nov 7, 2014
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proppy mentioned this pull request Nov 7, 2014

generate certs if REGISTRY_TLS_VERIFY GoogleCloudPlatform/docker-registry-driver-gcs#31

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proppy reviewed Nov 7, 2014
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tiborvass force-pushed the tls-registry branch from 5890418 to 5ab86d7 Compare November 7, 2014 22:51

tiborvass changed the title ~~Enable TLS by default if /ssl directory is present~~ Serve a TLS endpoint if REGISTRY_TLS_VERIFY is set and GUNICORN_OPTS is not Nov 7, 2014

tiborvass force-pushed the tls-registry branch 2 times, most recently from 8aa5c8d to eef7d1c Compare November 10, 2014 20:40

If REGISTRY_TLS_VERIFY is set, but GUNICORN_OPTS is not, serve TLS.

eef7d1c

This is done by setting GUNICORN_OPTS to some default value, expecting the following files to be present: * /ssl/ca.crt * /ssl/registry.cert * /ssl/registry.key Signed-off-by: Tibor Vass <teabee89@gmail.com>

dmp42 added the enhancement label Nov 11, 2014

dmp42 added this to the 1.0 milestone Nov 11, 2014

dmp42 added the security label Nov 11, 2014

stevvooe reviewed Dec 30, 2014
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Serve a TLS endpoint if REGISTRY_TLS_VERIFY is set and GUNICORN_OPTS is not #693

Serve a TLS endpoint if REGISTRY_TLS_VERIFY is set and GUNICORN_OPTS is not #693

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Serve a TLS endpoint if REGISTRY_TLS_VERIFY is set and GUNICORN_OPTS is not #693

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Serve a TLS endpoint if REGISTRY_TLS_VERIFY is set and GUNICORN_OPTS is not #693

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tiborvass commented Nov 7, 2014

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