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Merge pull request #913 from panteparak/DH-Param-Generator-Option

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Add DH param generator option
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Jason Wilder 2019-03-05 12:46:49 -07:00 committed by GitHub
commit 8c590fc68f
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3 changed files with 22 additions and 11 deletions
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24
README.md
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@ -181,8 +181,12 @@ Finally, start your containers with `VIRTUAL_HOST` environment variables.
$ docker run -e VIRTUAL_HOST=foo.bar.com ...
### SSL Support using letsencrypt
[letsencrypt-nginx-proxy-companion](https://github.com/JrCs/docker-letsencrypt-nginx-proxy-companion) is a lightweight companion container for the nginx-proxy. It allow the creation/renewal of Let's Encrypt certificates automatically.
[letsencrypt-nginx-proxy-companion](https://github.com/JrCs/docker-letsencrypt-nginx-proxy-companion) is a lightweight companion container for the nginx-proxy. It allow the creation/renewal of Let's Encrypt certificates automatically.
Set `DHPARAM_GENERATION` environment variable to `false` to disabled Diffie-Hellman parameters completely. This will also ignore auto-generation made by `nginx-proxy`.
The default value is `true`
$ docker run -e DHPARAM_GENERATION=false ....
### SSL Support
SSL is supported using single host, wildcard and SNI certificates using naming conventions for
@ -214,7 +218,7 @@ at startup. Since it can take minutes to generate a new `dhparam.pem`, it is do
background. Once generation is complete, the `dhparam.pem` is saved on a persistent volume and nginx
is reloaded. This generation process only occurs the first time you start `nginx-proxy`.
> COMPATIBILITY WARNING: The default generated `dhparam.pem` key is 2048 bits for A+ security. Some
> COMPATIBILITY WARNING: The default generated `dhparam.pem` key is 2048 bits for A+ security. Some
> older clients (like Java 6 and 7) do not support DH keys with over 1024 bits. In order to support these
> clients, you must either provide your own `dhparam.pem`, or tell `nginx-proxy` to generate a 1024-bit
> key on startup by passing `-e DHPARAM_BITS=1024`.
@ -282,12 +286,12 @@ a 500.
To serve traffic in both SSL and non-SSL modes without redirecting to SSL, you can include the
environment variable `HTTPS_METHOD=noredirect` (the default is `HTTPS_METHOD=redirect`). You can also
disable the non-SSL site entirely with `HTTPS_METHOD=nohttp`, or disable the HTTPS site with
`HTTPS_METHOD=nohttps`. `HTTPS_METHOD` must be specified on each container for which you want to
override the default behavior. If `HTTPS_METHOD=noredirect` is used, Strict Transport Security (HSTS)
is disabled to prevent HTTPS users from being redirected by the client. If you cannot get to the HTTP
site after changing this setting, your browser has probably cached the HSTS policy and is automatically
redirecting you back to HTTPS. You will need to clear your browser's HSTS cache or use an incognito
disable the non-SSL site entirely with `HTTPS_METHOD=nohttp`, or disable the HTTPS site with
`HTTPS_METHOD=nohttps`. `HTTPS_METHOD` must be specified on each container for which you want to
override the default behavior. If `HTTPS_METHOD=noredirect` is used, Strict Transport Security (HSTS)
is disabled to prevent HTTPS users from being redirected by the client. If you cannot get to the HTTP
site after changing this setting, your browser has probably cached the HSTS policy and is automatically
redirecting you back to HTTPS. You will need to clear your browser's HSTS cache or use an incognito
window / different browser.
By default, [HTTP Strict Transport Security (HSTS)](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security)
@ -410,7 +414,7 @@ Before submitting pull requests or issues, please check github to make sure an e
To run tests, you need to prepare the docker image to test which must be tagged `jwilder/nginx-proxy:test`:
docker build -t jwilder/nginx-proxy:test . # build the Debian variant image
and call the [test/pytest.sh](test/pytest.sh) script.
Then build the Alpine variant of the image:
@ -423,7 +427,7 @@ and call the [test/pytest.sh](test/pytest.sh) script again.
If your system has the `make` command, you can automate those tasks by calling:
make test
You can learn more about how the test suite works and how to write new tests in the [test/README.md](test/README.md) file.

3
docker-entrypoint.sh
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@ -16,7 +16,8 @@ fi
# Generate dhparam file if required
# Note: if $DHPARAM_BITS is not defined, generate-dhparam.sh will use 2048 as a default
/app/generate-dhparam.sh $DHPARAM_BITS
# Note2: if $DHPARAM_GENERATION is set to false in environment variable, dh param generator will skip completely
/app/generate-dhparam.sh $DHPARAM_BITS $DHPARAM_GENERATION
# Compute the DNS resolvers for use in the templates - if the IP contains ":", it's IPv6 and must be enclosed in []
export RESOLVERS=$(awk '$1 == "nameserver" {print ($2 ~ ":")? "["$2"]": $2}' ORS=' ' /etc/resolv.conf | sed 's/ *$//g')

6
generate-dhparam.sh
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@ -2,6 +2,7 @@
# The first argument is the bit depth of the dhparam, or 2048 if unspecified
DHPARAM_BITS=${1:-2048}
GENERATE_DHPARAM=${2:-true}
# If a dhparam file is not available, use the pre-generated one and generate a new one in the background.
# Note that /etc/nginx/dhparam is a volume, so this dhparam will persist restarts.
@ -25,6 +26,11 @@ if [[ -f $DHPARAM_FILE ]]; then
fi
fi
if [[ $GENERATE_DHPARAM =~ ^[Ff][Aa][Ll][Ss][Ee]$ ]]; then
echo "Skipping Diffie-Hellman parameters generation and Ignoring pre-generated dhparam.pem"
exit 0
fi
cat >&2 <<-EOT
WARNING: $DHPARAM_FILE was not found. A pre-generated dhparam.pem will be used for now while a new one
is being generated in the background. Once the new dhparam.pem is in place, nginx will be reloaded.