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authelia/docs/deployment/supported-proxies/haproxy.md
James Elliott 1060bcee06
docs: caddy integration (#3307) 
This adds docs on integration with Caddy.

Closes #1241
2022-05-07 09:18:28 +10:00

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---
layout: default
title: HAProxy
parent: Proxy Integration
grand_parent: Deployment
nav_order: 2
---
# HAProxy
[HAProxy] is a reverse proxy supported by **Authelia**.
## Requirements
You need the following to run Authelia with HAProxy:
* HAProxy 1.8.4+ (2.2.0+ recommended)
* `USE_LUA=1` set at compile time
* [haproxy-lua-http](https://github.com/haproxytech/haproxy-lua-http) must be available within the Lua path
* A `json` library within the Lua path (dependency of haproxy-lua-http, usually found as OS package `lua-json`)
* With HAProxy 2.1.3+ you can use the [`lua-prepend-path`] configuration option to specify the search path.
* [haproxy-auth-request](https://github.com/TimWolla/haproxy-auth-request/blob/master/auth-request.lua)
## Configuration
Below you will find commented examples of the following configuration:
* Authelia portal
* Protected endpoint (Nextcloud)
* Protected endpoint with `Authorization` header for basic authentication (Heimdall)
* [haproxy-auth-request](https://github.com/TimWolla/haproxy-auth-request/blob/master/auth-request.lua)
With this configuration you can protect your virtual hosts with Authelia, by following the steps below:
1. Add host(s) to the `protected-frontends` or `protected-frontends-basic` ACLs to support protection with Authelia.
You can separate each subdomain with a `|` in the regex, for example:
```
acl protected-frontends hdr(host) -m reg -i ^(?i)(jenkins|nextcloud|phpmyadmin)\.example\.com
acl protected-frontends-basic hdr(host) -m reg -i ^(?i)(heimdall)\.example\.com
```
2. Add host ACL(s) in the form of `host-service`, this will be utilised to route to the correct
backend upon successful authentication, for example:
```
acl host-jenkins hdr(host) -i jenkins.example.com
acl host-nextcloud hdr(host) -i nextcloud.example.com
acl host-phpmyadmin hdr(host) -i phpmyadmin.example.com
acl host-heimdall hdr(host) -i heimdall.example.com
```
3. Add backend route for your service(s), for example:
```
use_backend be_jenkins if host-jenkins
use_backend be_nextcloud if host-nextcloud
use_backend be_phpmyadmin if host-phpmyadmin
use_backend be_heimdall if host-heimdall
```
4. Add backend definitions for your service(s), for example:
```
backend be_jenkins
server jenkins jenkins:8080
backend be_nextcloud
server nextcloud nextcloud:443 ssl verify none
backend be_phpmyadmin
server phpmyadmin phpmyadmin:80
backend be_heimdall
server heimdall heimdall:443 ssl verify none
```
### Secure Authelia with TLS
There is a [known limitation](https://github.com/TimWolla/haproxy-auth-request/issues/12) with haproxy-auth-request with regard to TLS-enabled backends.
If you want to run Authelia TLS enabled the recommended workaround utilises HAProxy itself to proxy the requests.
This comes at a cost of two additional TCP connections, but allows the full HAProxy configuration flexibility with regard
to TLS verification as well as header rewriting. An example of this configuration is also be provided below.
#### Configuration
##### haproxy.cfg
```
global
# Path to haproxy-lua-http, below example assumes /usr/local/etc/haproxy/haproxy-lua-http/http.lua
lua-prepend-path /usr/local/etc/haproxy/?/http.lua
# Path to haproxy-auth-request
lua-load /usr/local/etc/haproxy/auth-request.lua
log stdout format raw local0 debug
defaults
mode http
log global
option httplog
option forwardfor
frontend fe_http
bind *:443 ssl crt /usr/local/etc/haproxy/haproxy.pem
# Host ACLs
acl protected-frontends hdr(host) -m reg -i ^(?i)(nextcloud)\.example\.com
acl protected-frontends-basic hdr(host) -m reg -i ^(?i)(heimdall)\.example\.com
acl host-authelia hdr(host) -i auth.example.com
acl host-nextcloud hdr(host) -i nextcloud.example.com
acl host-heimdall hdr(host) -i heimdall.example.com
# This is required if utilising basic auth with /api/verify?auth=basic
http-request set-var(txn.host) hdr(Host)
http-request set-var(req.scheme) str(https) if { ssl_fc }
http-request set-var(req.scheme) str(http) if !{ ssl_fc }
http-request set-var(req.questionmark) str(?) if { query -m found }
# These are optional if you wish to use the Methods rule in the access_control section.
#http-request set-var(req.method) str(CONNECT) if { method CONNECT }
#http-request set-var(req.method) str(GET) if { method GET }
#http-request set-var(req.method) str(HEAD) if { method HEAD }
#http-request set-var(req.method) str(OPTIONS) if { method OPTIONS }
#http-request set-var(req.method) str(POST) if { method POST }
#http-request set-var(req.method) str(TRACE) if { method TRACE }
#http-request set-var(req.method) str(PUT) if { method PUT }
#http-request set-var(req.method) str(PATCH) if { method PATCH }
#http-request set-var(req.method) str(DELETE) if { method DELETE }
#http-request set-header X-Forwarded-Method %[var(req.method)]
# Required headers
http-request set-header X-Real-IP %[src]
http-request set-header X-Forwarded-Method %[var(req.method)]
http-request set-header X-Forwarded-Proto %[var(req.scheme)]
http-request set-header X-Forwarded-Host %[req.hdr(Host)]
http-request set-header X-Forwarded-Uri %[path]%[var(req.questionmark)]%[query]
# Protect endpoints with haproxy-auth-request and Authelia
http-request lua.auth-request be_authelia /api/verify if protected-frontends
# Force `Authorization` header via query arg to /api/verify
http-request lua.auth-request be_authelia /api/verify?auth=basic if protected-frontends-basic
# Redirect protected-frontends to Authelia if not authenticated
http-request redirect location https://auth.example.com/?rd=%[var(req.scheme)]://%[base]%[var(req.questionmark)]%[query] if protected-frontends !{ var(txn.auth_response_successful) -m bool }
# Send 401 and pass `WWW-Authenticate` header on protected-frontend-basic if not pre-authenticated
http-request set-var(txn.auth) var(req.auth_response_header.www_authenticate) if protected-frontends-basic !{ var(txn.auth_response_successful) -m bool }
http-response deny deny_status 401 hdr WWW-Authenticate %[var(txn.auth)] if { var(txn.host) -m reg -i ^(?i)(heimdall)\.example\.com } !{ var(txn.auth_response_successful) -m bool }
# Authelia backend route
use_backend be_authelia if host-authelia
# Service backend route(s)
use_backend be_nextcloud if host-nextcloud
use_backend be_heimdall if host-heimdall
backend be_authelia
server authelia authelia:9091
backend be_nextcloud
# Pass Remote-User, Remote-Name, Remote-Email and Remote-Groups headers
acl remote_user_exist var(req.auth_response_header.remote_user) -m found
acl remote_groups_exist var(req.auth_response_header.remote_groups) -m found
acl remote_name_exist var(req.auth_response_header.remote_name) -m found
acl remote_email_exist var(req.auth_response_header.remote_email) -m found
http-request set-header Remote-User %[var(req.auth_response_header.remote_user)] if remote_user_exist
http-request set-header Remote-Groups %[var(req.auth_response_header.remote_groups)] if remote_groups_exist
http-request set-header Remote-Name %[var(req.auth_response_header.remote_name)] if remote_name_exist
http-request set-header Remote-Email %[var(req.auth_response_header.remote_email)] if remote_email_exist
server nextcloud nextcloud:443 ssl verify none
backend be_heimdall
# Pass Remote-User, Remote-Name, Remote-Email and Remote-Groups headers
acl remote_user_exist var(req.auth_response_header.remote_user) -m found
acl remote_groups_exist var(req.auth_response_header.remote_groups) -m found
acl remote_name_exist var(req.auth_response_header.remote_name) -m found
acl remote_email_exist var(req.auth_response_header.remote_email) -m found
http-request set-header Remote-User %[var(req.auth_response_header.remote_user)] if remote_user_exist
http-request set-header Remote-Groups %[var(req.auth_response_header.remote_groups)] if remote_groups_exist
http-request set-header Remote-Name %[var(req.auth_response_header.remote_name)] if remote_name_exist
http-request set-header Remote-Email %[var(req.auth_response_header.remote_email)] if remote_email_exist
server heimdall heimdall:443 ssl verify none
```
##### haproxy.cfg (TLS enabled Authelia)
```
global
# Path to haproxy-lua-http, below example assumes /usr/local/etc/haproxy/haproxy-lua-http/http.lua
lua-prepend-path /usr/local/etc/haproxy/?/http.lua
# Path to haproxy-auth-request
lua-load /usr/local/etc/haproxy/auth-request.lua
log stdout format raw local0 debug
defaults
mode http
log global
option httplog
option forwardfor
frontend fe_http
bind *:443 ssl crt /usr/local/etc/haproxy/haproxy.pem
# Host ACLs
acl protected-frontends hdr(host) -m reg -i ^(?i)(nextcloud)\.example\.com
acl protected-frontends-basic hdr(host) -m reg -i ^(?i)(heimdall)\.example\.com
acl host-authelia hdr(host) -i auth.example.com
acl host-nextcloud hdr(host) -i nextcloud.example.com
acl host-heimdall hdr(host) -i heimdall.example.com
# This is required if utilising basic auth with /api/verify?auth=basic
http-request set-var(txn.host) hdr(Host)
http-request set-var(req.scheme) str(https) if { ssl_fc }
http-request set-var(req.scheme) str(http) if !{ ssl_fc }
http-request set-var(req.questionmark) str(?) if { query -m found }
# These are optional if you wish to use the Methods rule in the access_control section.
#http-request set-var(req.method) str(CONNECT) if { method CONNECT }
#http-request set-var(req.method) str(GET) if { method GET }
#http-request set-var(req.method) str(HEAD) if { method HEAD }
#http-request set-var(req.method) str(OPTIONS) if { method OPTIONS }
#http-request set-var(req.method) str(POST) if { method POST }
#http-request set-var(req.method) str(TRACE) if { method TRACE }
#http-request set-var(req.method) str(PUT) if { method PUT }
#http-request set-var(req.method) str(PATCH) if { method PATCH }
#http-request set-var(req.method) str(DELETE) if { method DELETE }
#http-request set-header X-Forwarded-Method %[var(req.method)]
# Required headers
http-request set-header X-Real-IP %[src]
http-request set-header X-Forwarded-Proto %[var(req.scheme)]
http-request set-header X-Forwarded-Host %[req.hdr(Host)]
http-request set-header X-Forwarded-Uri %[path]%[var(req.questionmark)]%[query]
# Protect endpoints with haproxy-auth-request and Authelia
http-request lua.auth-request be_authelia_proxy /api/verify if protected-frontends
# Force `Authorization` header via query arg to /api/verify
http-request lua.auth-request be_authelia_proxy /api/verify?auth=basic if protected-frontends-basic
# Redirect protected-frontends to Authelia if not authenticated
http-request redirect location https://auth.example.com/?rd=%[var(req.scheme)]://%[base]%[var(req.questionmark)]%[query] if protected-frontends !{ var(txn.auth_response_successful) -m bool }
# Send 401 and pass `WWW-Authenticate` header on protected-frontend-basic if not pre-authenticated
http-request set-var(txn.auth) var(req.auth_response_header.www_authenticate) if protected-frontends-basic !{ var(txn.auth_response_successful) -m bool }
http-response deny deny_status 401 hdr WWW-Authenticate %[var(txn.auth)] if { var(txn.host) -m reg -i ^(?i)(heimdall)\.example\.com } !{ var(txn.auth_response_successful) -m bool }
# Authelia backend route
use_backend be_authelia if host-authelia
# Service backend route(s)
use_backend be_nextcloud if host-nextcloud
use_backend be_heimdall if host-heimdall
backend be_authelia
server authelia authelia:9091
backend be_authelia_proxy
mode http
server proxy 127.0.0.1:9092
listen authelia_proxy
mode http
bind 127.0.0.1:9092
server authelia authelia:9091 ssl verify none
backend be_nextcloud
# Pass Remote-User, Remote-Name, Remote-Email and Remote-Groups headers
acl remote_user_exist var(req.auth_response_header.remote_user) -m found
acl remote_groups_exist var(req.auth_response_header.remote_groups) -m found
acl remote_name_exist var(req.auth_response_header.remote_name) -m found
acl remote_email_exist var(req.auth_response_header.remote_email) -m found
http-request set-header Remote-User %[var(req.auth_response_header.remote_user)] if remote_user_exist
http-request set-header Remote-Groups %[var(req.auth_response_header.remote_groups)] if remote_groups_exist
http-request set-header Remote-Name %[var(req.auth_response_header.remote_name)] if remote_name_exist
http-request set-header Remote-Email %[var(req.auth_response_header.remote_email)] if remote_email_exist
server nextcloud nextcloud:443 ssl verify none
backend be_heimdall
# Pass Remote-User, Remote-Name, Remote-Email and Remote-Groups headers
acl remote_user_exist var(req.auth_response_header.remote_user) -m found
acl remote_groups_exist var(req.auth_response_header.remote_groups) -m found
acl remote_name_exist var(req.auth_response_header.remote_name) -m found
acl remote_email_exist var(req.auth_response_header.remote_email) -m found
http-request set-header Remote-User %[var(req.auth_response_header.remote_user)] if remote_user_exist
http-request set-header Remote-Groups %[var(req.auth_response_header.remote_groups)] if remote_groups_exist
http-request set-header Remote-Name %[var(req.auth_response_header.remote_name)] if remote_name_exist
http-request set-header Remote-Email %[var(req.auth_response_header.remote_email)] if remote_email_exist
server heimdall heimdall:443 ssl verify none
```
[HAproxy]: https://www.haproxy.org/
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