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Merge pull request #56 from jwilder/jw-https

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Add SSL Support
This commit is contained in:
Jason Wilder 2014-12-01 17:40:44 -07:00
parent 20093a1f83 51c5c172ee
commit 61c3933e0e
3 changed files with 106 additions and 3 deletions
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7
Dockerfile
View file

@ -21,7 +21,7 @@ RUN echo "daemon off;" >> /etc/nginx/nginx.conf \
RUN wget -P /usr/local/bin https://godist.herokuapp.com/projects/ddollar/forego/releases/current/linux-amd64/forego \
&& chmod u+x /usr/local/bin/forego
ENV DOCKER_GEN_VERSION 0.3.4
ENV DOCKER_GEN_VERSION 0.3.6
RUN wget https://github.com/jwilder/docker-gen/releases/download/$DOCKER_GEN_VERSION/docker-gen-linux-amd64-$DOCKER_GEN_VERSION.tar.gz \
&& tar -C /usr/local/bin -xvzf docker-gen-linux-amd64-$DOCKER_GEN_VERSION.tar.gz \
@ -30,8 +30,9 @@ RUN wget https://github.com/jwilder/docker-gen/releases/download/$DOCKER_GEN_VER
COPY . /app/
WORKDIR /app/
EXPOSE 80
EXPOSE 80 443
ENV DOCKER_HOST unix:///tmp/docker.sock
VOLUME ["/etc/nginx/certs"]
CMD ["forego", "start", "-r"]

44
README.md
View file

@ -51,3 +51,47 @@ $ docker run --volumes-from nginx \
Finally, start your containers with `VIRTUAL_HOST` environment variables.
$ docker run -e VIRTUAL_HOST=foo.bar.com ...
### SSL Support
SSL is supported single host, wildcards and SNI certificates using naming conventions for
certificates or optionally specify a cert name (for SNI) as an environment variable.
To enable SSL:
$ docker run -d -p 80:80 -p 443:443 -v /path/to/certs:/etc/nginx/certs -v /var/run/docker.sock:/tmp/docker.sock jwilder/nginx-proxy
The contents of `/path/to/certs` should contain the certificates and private keys for any virtual
hosts in use. The certificate and keys should be named after the virtual host with a `.crt` and
`.key` extension. For example, a container with `VIRTUAL_HOST=foo.bar.com` should have a
`foo.bar.com.crt` and 'foo.bar.com.key' file in the certs directory.
#### Wildcard Certificates
Wildcard certificate and keys should be name after the domain name with a `.crt` and `.key` extension.
For example `VIRTUAL_HOST=foo.bar.com` could also use cert name `bar.com.crt` and `bar.com.key`.
#### SNI
If your certificate(s) supports multiple domain names, you can start a container with `CERT_NAME=<name>`
to identify the certificate to be used. For example, a certificate for `*.foo.com` and `*.bar.com`
could be name `shared.crt` and `shared.key`. A container running with `VIRTUAL_HOST=foo.bar.com`
and `CERT_NAME=shared` will then use this shared cert.
#### How SSL Support Works
The SSL cipher configuration is based on [mozilla nginx intermediate profile](https://wiki.mozilla.org/Security/Server_Side_TLS#Nginx) which
should provide compatibility with clients back to Firefox 1, Chrome 1, IE 7, Opera 5, Safari 1,
Windows XP IE8, Android 2.3, Java 7. The configuration also enables OCSP stapling, HSTS, and SSL
session caches.
The behavior for the proxy when port 80 and 443 are exposed is as follows:
* If a container has a usable cert, port 80 will redirect to 443 for that container so that HTTPS
is always preferred when available.
* If the container does not have a usable cert, a 503 will be returned.
Note that in the latter case, a browser may get an connection error as no certificate is available
to establish a connection. A self-signed or generic cert can be defined as "default.crt" and "default.key"
which will allow a client browser to make a SSL connection (likely w/ a warning) and subsequently receive
a 503.

58
nginx.tmpl
View file

@ -36,6 +36,7 @@ server {
}
{{ range $host, $containers := groupByMulti $ "Env.VIRTUAL_HOST" "," }}
upstream {{ $host }} {
{{ range $container := $containers }}
{{ $addrLen := len $container.Addresses }}
@ -65,6 +66,50 @@ upstream {{ $host }} {
{{ end }}
}
{{/* Get the first cert name defined by containers w/ the same vhost */}}
{{ $certName := (first (groupByKeys $containers "Env.CERT_NAME")) }}
{{/* Get the best matching cert by name for the vhost. */}}
{{ $vhostCert := (closest (dir "/etc/nginx/certs") (printf "%s.crt" $host))}}
{{/* vhostCert is actually a filename so remove any suffixes since they are added later */}}
{{ $vhostCert := replace $vhostCert ".crt" "" -1 }}
{{ $vhostCert := replace $vhostCert ".key" "" -1 }}
{{/* Use the cert specifid on the container or fallback to the best vhost match */}}
{{ $cert := (coalesce $certName $vhostCert) }}
{{ if (ne $cert "") }}
server {
server_name {{ $host }};
rewrite ^(.*) https://{{ $host }}$1 permanent;
}
server {
server_name {{ $host }};
listen 443 ssl;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA;
ssl_prefer_server_ciphers on;
ssl_session_timeout 5m;
ssl_session_cache shared:SSL:50m;
ssl_stapling on;
ssl_stapling_verify on;
ssl_certificate /etc/nginx/certs/{{ (printf "%s.crt" $cert) }};
ssl_certificate_key /etc/nginx/certs/{{ (printf "%s.key" $cert) }};
add_header Strict-Transport-Security "max-age=31536000; includeSubdomains";
location / {
proxy_pass http://{{ $host }};
}
}
{{ else }}
server {
server_name {{ $host }};
@ -72,4 +117,17 @@ server {
proxy_pass http://{{ $host }};
}
}
server {
server_name {{ $host }};
listen 443 ssl;
return 503;
{{ if (and (exists "/etc/nginx/certs/default.crt") (exists "/etc/nginx/certs/default.key")) }}
ssl_certificate /etc/nginx/certs/default.crt;
ssl_certificate_key /etc/nginx/certs/default.key;
{{ end }}
}
{{ end }}
{{ end }}