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Add PROXY protocol beween bk_https and fe_https in HAProxy example

andrewheberle 2019-11-23 10:15:47 +08:00
parent 8659336120
commit b5360b3607
1 changed files with 10 additions and 8 deletions
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18
TLS-ALPN-without-downtime.md

@ -12,7 +12,7 @@ This article outlines some ways it is possible to configure webservers to work t
|-----------|--------|---------|
| Apache httpd | Not possible | Consider using [mod_md](https://github.com/icing/mod_md), which is an Apache module that replaces acme.sh. It can perform TLS-ALPN validation since version 1.99. |
| nginx | Supported | Requires [ngx_stream_ssl_preread_module](http://nginx.org/en/docs/stream/ngx_stream_ssl_preread_module.html) to be compiled. e.g. on Ubuntu 18.04, included in the `nginx-full` package. |
| haproxy | Supported | Requires haproxy >= 1.9.1
| HAProxy | Supported | Requires HAProxy >= 1.9.1
## Instructions
@ -81,23 +81,25 @@ stream {
$ sudo acme.sh --issue --alpn --tlsport 10443 -d example.org
### haproxy
### HAProxy
With haproxy, what we have to do is run an ALPN load balancer frontend in TCP mode on port 443, and re-assign all HTTPS frontends to an alternate port.
With HAProxy, what we have to do is run an ALPN load balancer frontend in TCP mode on port 443, and re-assign all HTTPS frontends to an alternate port.
When a TLS-ALPN connection for ACME comes in, it will be routed to acme.sh, otherwise, the connection is forwarded to the normal HTTPS frontend.
1\. Verify that haproxy is at least version 1.9.1:
1\. Verify that HAProxy is at least version 1.9.1:
$ haproxy -v
HA-Proxy version 1.9.2 2019/01/16 - https://haproxy.org/
2\. In the haproxy configuration, as well as re-assigning your existing HTTPS (443) frontend to port 8443, you will need to add:
2\. In the HAProxy configuration, as well as re-assigning your existing HTTPS (443) frontend to port 8443, you will need to add:
1. `fe_alpn` - a TCP frontend on 443 to load balance ALPN
2. `bk_acmesh` - A backend to send requests to acme.sh
3. `bk_https` - A backend to send requests to your regular HTTPS frontend
In this example the PROXY protocol is used between `bk_https` and `fe_https` so the original clients source IP is known.
```haproxy
# New
frontend fe_alpn
@ -114,12 +116,12 @@ backend bk_acmesh
# New
backend bk_https
server https 127.0.0.1:8443
server https 127.0.0.1:8443 send-proxy-v2
# Existing, changed from 443 -> 8443
# Existing, changed from :443 -> 127.0.0.1:8443
frontend fe_https
mode http
bind :8443 ssl crt /etc/ssl/haproxy.pem
bind 127.0.0.1:8443 ssl crt /etc/ssl/haproxy.pem accept-proxy
# ...
```