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[DOCS] Update proxy integration example for HAProxy (#935)
* [DOCS] Update proxy integration example for HAProxy * Minor style tweak * Update haproxy.md Co-authored-by: James Elliott <james-d-elliott@users.noreply.github.com>
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Amir Zarrinkafsh
GitHub
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---
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layout: default
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title: HAProxy
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parent: Supported Proxies
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parent: Proxy Integration
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grand_parent: Deployment
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nav_order: 1
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---
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@ -10,6 +10,173 @@ nav_order: 1
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[HAProxy] is a reverse proxy supported by **Authelia**.
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UNDER CONSTRUCTION
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## Requirements
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You need the following to run Authelia with HAProxy:
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* HAProxy 1.8.4+
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* `USE_LUA=1` set at compile time
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* [haproxy-auth-request](https://github.com/TimWolla/haproxy-auth-request/blob/master/auth-request.lua)
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* LuaSocket with commit [0b03eec16b](https://github.com/diegonehab/luasocket/commit/0b03eec16be0b3a5efe71bcb8887719d1ea87d60) (that is: newer than 2014-11-10) in your Lua library path (`LUA_PATH`)
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* `lua-socket` from Debian Stretch works
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* `lua-socket` from Ubuntu Xenial works
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* `lua-socket` from Ubuntu Bionic works
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* `lua5.3-socket` from Alpine 3.8 works
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* `luasocket` from luarocks *does not* work
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* `lua-socket` v3.0.0.17.rc1 from EPEL *does not* work
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* `lua-socket` from Fedora 28 *does not* work
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## Configuration
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Below you will find commented examples of the following configuration:
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* Authelia portal
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* Protected endpoint (Nextcloud)
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* [haproxy-auth-request](https://github.com/TimWolla/haproxy-auth-request/blob/master/auth-request.lua)
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With this configuration you can protect your virtual hosts with Authelia, by following the steps below:
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1. Add host(s) to the `protected-frontends` ACL to support protection with Authelia.
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You can separate each subdomain with a `|` in the regex, for example:
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```editorconfig
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acl protected-frontends hdr(host) -m reg -i ^(jenkins|nextcloud|phpmyadmin)\.example\.com
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```
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2. Add host ACL(s) in the form of `host-service`, this will be utilised to route to the correct
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backend upon successful authentication, for example:
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```editorconfig
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acl host-jenkins hdr(host) -i jenkins.example.com
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acl host-jenkins hdr(host) -i nextcloud.example.com
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acl host-phpmyadmin hdr(host) -i phpmyadmin.example.com
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```
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3. Add backend route for your service(s), for example:
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```editorconfig
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use_backend be_jenkins if host-jenkins
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use_backend be_nextcloud if host-nextcloud
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use_backend be_phpmyadmin if host-phpmyadmin
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```
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4. Add backend definitions for your service(s), for example:
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```editorconfig
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backend be_jenkins
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server jenkins jenkins:8080
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backend be_nextcloud
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server nextcloud nextcloud:443 ssl verify none
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backend be_phpmyadmin
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server phpmyadmin phpmyadmin:80
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```
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### Secure Authelia with TLS
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There is a [known limitation](https://github.com/TimWolla/haproxy-auth-request/issues/12) with haproxy-auth-request with regard to TLS-enabled backends.
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If you want to run Authelia TLS enabled the recommended workaround utilises HAProxy itself to proxy the requests.
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This comes at a cost of two additional TCP connections, but allows the full HAProxy configuration flexbility with regard
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to TLS verification as well as header rewriting. An example of this configuration is also be provided below.
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#### Configuration
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##### haproxy.cfg
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```editorconfig
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global
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# Path to haproxy-auth-request
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lua-load /usr/local/etc/haproxy/auth-request.lua
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log stdout format raw local0 debug
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defaults
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mode http
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log global
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option httplog
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option forwardfor
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frontend fe_http
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bind *:443 ssl crt /usr/local/etc/haproxy/haproxy.pem
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# Host ACLs
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acl protected-frontends hdr(host) -m reg -i ^(nextcloud)\.example\.com
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acl host-authelia hdr(host) -i auth.example.com
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acl host-nextcloud hdr(host) -i nextcloud.example.com
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http-request set-var(req.scheme) str(https) if { ssl_fc }
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http-request set-var(req.scheme) str(http) if !{ ssl_fc }
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http-request set-var(req.questionmark) str(?) if { query -m found }
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# Headers to construct redirection URL
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http-request set-header X-Real-IP %[src]
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http-request set-header X-Forwarded-Proto %[var(req.scheme)]
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http-request set-header X-Forwarded-Host %[req.hdr(Host)]
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http-request add-header X-Forwarded-Port %[dst_port]
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http-request set-header X-Forwarded-Uri %[path]%[var(req.questionmark)]%[query]
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# Protect endpoints with haproxy-auth-request and Authelia
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http-request lua.auth-request be_authelia /api/verify if protected-frontends
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# Authelia backend route
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use_backend be_authelia if host-authelia
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# Redirect protected-frontends to Authelia if not authenticated
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use_backend be_authelia if protected-frontends !{ var(txn.auth_response_successful) -m bool }
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# Service backend route(s)
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use_backend be_nextcloud if host-nextcloud
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backend be_authelia
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server authelia authelia:9091
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backend be_nextcloud
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server nextcloud nextcloud:443 ssl verify none
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```
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##### haproxy.cfg (TLS enabled Authelia)
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```editorconfig
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global
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# Path to haproxy-auth-request
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lua-load /usr/local/etc/haproxy/auth-request.lua
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log stdout format raw local0 debug
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defaults
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mode http
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log global
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option httplog
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option forwardfor
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frontend fe_http
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bind *:443 ssl crt /usr/local/etc/haproxy/haproxy.pem
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# Host ACLs
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acl protected-frontends hdr(host) -m reg -i ^(nextcloud)\.example\.com
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acl host-authelia hdr(host) -i auth.example.com
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acl host-nextcloud hdr(host) -i nextcloud.example.com
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http-request set-var(req.scheme) str(https) if { ssl_fc }
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http-request set-var(req.scheme) str(http) if !{ ssl_fc }
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http-request set-var(req.questionmark) str(?) if { query -m found }
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# Headers to construct redirection URL
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http-request set-header X-Real-IP %[src]
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http-request set-header X-Forwarded-Proto %[var(req.scheme)]
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http-request set-header X-Forwarded-Host %[req.hdr(Host)]
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http-request add-header X-Forwarded-Port %[dst_port]
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http-request set-header X-Forwarded-Uri %[path]%[var(req.questionmark)]%[query]
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# Protect endpoints with haproxy-auth-request and Authelia
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http-request lua.auth-request be_authelia_proxy /api/verify if protected-frontends
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# Authelia backend route
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use_backend be_authelia if host-authelia
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# Redirect protected-frontends to Authelia if not authenticated
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use_backend be_authelia if protected-frontends !{ var(txn.auth_response_successful) -m bool }
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# Service backend route(s)
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use_backend be_nextcloud if host-nextcloud
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backend be_authelia
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server authelia authelia:9091
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backend be_authelia_proxy
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mode http
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server proxy 127.0.0.1:9092
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listen authelia_proxy
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mode http
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bind 127.0.0.1:9092
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server authelia authelia:9091 ssl verify none
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backend be_nextcloud
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server nextcloud nextcloud:443 ssl verify none
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```
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[HAproxy]: https://www.haproxy.org/
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