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Add VIRTUAL_GROUP container filtering and update docs

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Jonathan Isaac Frellington 2017-10-29 18:42:00 -04:00
parent 1b868259fe
commit 49338a1cf6
2 changed files with 24 additions and 1 deletions
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20
README.md
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@ -114,6 +114,26 @@ When internal-only access is enabled, external clients with be denied with an `H
> If there is a load-balancer / reverse proxy in front of `nginx-proxy` that hides the client IP (example: AWS Application/Elastic Load Balancer), you will need to use the nginx `realip` module (already installed) to extract the client's IP from the HTTP request headers. Please see the [nginx realip module configuration](http://nginx.org/en/docs/http/ngx_http_realip_module.html) for more details. This configuration can be added to a new config file and mounted in `/etc/nginx/conf.d/`.
### Proxy Groups
You can limit proxy services to a specific group of containers. Setting
the env var VIRTUAL_GROUP on a nginx-proxy container to an arbitrary name
will restrict it to servicing only containers having an env var VIRTUAL_GROUP
with the same name. Unlike Local Network Access or other restrictions,
groups restrict what a nginx-proxy instance knows about other virtual hosts.
Consider a docker host running two nginx-proxy containers; one for public
services and another for publicly acessible, secured "backend" services. By
default, both proxy servers will contain directives (e.g. `upstream`,
`server`, etc.) for all virtual hosts. Defining two groups `PUBLIC`
and `BACKEND` and applying them to their respective nginx-proxy instance
and virtual hosts ensures that each proxy server only knows about and
serves their intended virtual hosts.
> Grouping only affects nginx-proxy configurations. Each nginx-proxy must
still be attached to appropriate networks to access containers for which
they are proxies.
### SSL Backends
If you would like the reverse proxy to connect to your backend using HTTPS instead of HTTP, set `VIRTUAL_PROTO=https` on the backend container.

5
nginx.tmpl
View file

@ -110,7 +110,10 @@ server {
}
{{ end }}
{{ range $host, $containers := groupByMulti $ "Env.VIRTUAL_HOST" "," }}
{{/* Filter containers by VIRTUAL_GROUP, if set; otherwise use all containers */}}
{{ $vgrp := or $.Env.VIRTUAL_GROUP "" }}
{{ $filtered := or (where $ "Env.VIRTUAL_GROUP" $vgrp) $ }}
{{ range $host, $containers := groupByMulti $filtered "Env.VIRTUAL_HOST" "," }}
{{ $host := trim $host }}
{{ $is_regexp := hasPrefix "~" $host }}