X4u/add apache cloudflare deploy info

DEPLOY.md

@@ -19,7 +19,7 @@ You may simply download the binary that fits your machine. Run `uname -m` to see
 | armv8 / aarch64                             | [Binary][armv8-glibc-master] / [.deb][armv8-glibc-master-deb]   | [Binary][armv8-glibc-next] / [.deb][armv8-glibc-next-deb]   |
 
 These builds were created on and linked against the glibc version shipped with Debian bullseye.
-If you use a system with an older glibc version, you might need to compile Conduit yourself.
+If you use a system with an older glibc version (e.g. RHEL8), you might need to compile Conduit yourself.
 
 [x84_64-glibc-master]: https://gitlab.com/famedly/conduit/-/jobs/artifacts/master/raw/build-output/linux_amd64/conduit?job=docker:master
 [armv7-glibc-master]: https://gitlab.com/famedly/conduit/-/jobs/artifacts/master/raw/build-output/linux_arm_v7/conduit?job=docker:master
@@ -39,12 +39,16 @@ $ sudo wget -O /usr/local/bin/matrix-conduit <url>
 $ sudo chmod +x /usr/local/bin/matrix-conduit
 ```
 
-Alternatively, you may compile the binary yourself
+Alternatively, you may compile the binary yourself. First, install any dependencies:
 
 ```bash
+# Debian
 $ sudo apt install libclang-dev build-essential
-```
 
+# RHEL
+$ sudo dnf install clang
+```
+Then, `cd` into the source tree of conduit-next and run:
 ```bash
 $ cargo build --release
 ```
@@ -74,7 +78,7 @@ cross build --release --no-default-features --features conduit_bin,backend_rocks
 While Conduit can run as any user it is usually better to use dedicated users for different services. This also allows
 you to make sure that the file permissions are correctly set up.
 
-In Debian you can use this command to create a Conduit user:
+In Debian or RHEL, you can use this command to create a Conduit user:
 
 ```bash
 sudo adduser --system conduit --no-create-home
@@ -86,6 +90,19 @@ Conduit uses the ports 443 and 8448 both of which need to be open in the firewal
 
 If Conduit runs behind a router or in a container and has a different public IP address than the host system these public ports need to be forwarded directly or indirectly to the port mentioned in the config.
 
+## Delegation of federation traffic
+
+If Conduit runs behind Cloudflare reverse proxy, which doesn't support port 8448 on free plans, [delegation](https://matrix-org.github.io/synapse/latest/delegate.html) can be set up to have federation traffic routed to port 443:
+```apache
+# .well-known delegation on Apache
+<Files "/.well-known/matrix/server">
+    ErrorDocument 200 '{"m.server": "your.server.name:443"}'
+    Header always set Content-Type application/json
+    Header always set Access-Control-Allow-Origin *
+</Files>
+```
+[SRV DNS record](https://spec.matrix.org/latest/server-server-api/#resolving-server-names) delegation is also [possible](https://www.cloudflare.com/en-gb/learning/dns/dns-records/dns-srv-record/).
+
 ## Setting up a systemd service
 
 Now we'll set up a systemd service for Conduit, so it's easy to start/stop Conduit and set it to autostart when your
@@ -101,6 +118,7 @@ After=network.target
 Environment="CONDUIT_CONFIG=/etc/matrix-conduit/conduit.toml"
 User=conduit
 Group=nogroup
+# On RHEL: Group=nobody
 Restart=always
 ExecStart=/usr/local/bin/matrix-conduit
 
@@ -168,7 +186,7 @@ address = "127.0.0.1" # This makes sure Conduit can only be reached using the re
 ## Setting the correct file permissions
 
 As we are using a Conduit specific user we need to allow it to read the config. To do that you can run this command on
-Debian:
+Debian or RHEL:
 
 ```bash
 sudo chown -R root:root /etc/matrix-conduit
@@ -180,6 +198,7 @@ If you use the default database path you also need to run this:
 ```bash
 sudo mkdir -p /var/lib/matrix-conduit/
 sudo chown -R conduit:nogroup /var/lib/matrix-conduit/
+# On RHEL: sudo chown -R conduit:nobody /var/lib/matrix-conduit/
 sudo chmod 700 /var/lib/matrix-conduit/
 ```
 
@@ -192,6 +211,11 @@ This depends on whether you use Apache, Caddy, Nginx or another web server.
 Create `/etc/apache2/sites-enabled/050-conduit.conf` and copy-and-paste this:
 
 ```apache
+# Requires mod_proxy and mod_proxy_http
+#
+# On Apache instance compiled from source,
+# paste into httpd-ssl.conf or httpd.conf
+
 Listen 8448
 
 <VirtualHost *:443 *:8448>
@@ -208,7 +232,11 @@ ProxyPassReverse /_matrix/ http://127.0.0.1:6167/_matrix/
 **You need to make some edits again.** When you are done, run
 
 ```bash
+# Debian
 $ sudo systemctl reload apache2
+
+# Installed from source
+$ sudo apachectl -k graceful
 ```
 
 ### Caddy
@@ -266,11 +294,19 @@ $ sudo systemctl reload nginx
 
 If you chose Caddy as your web proxy SSL certificates are handled automatically and you can skip this step.
 
-The easiest way to get an SSL certificate, if you don't have one already, is to install `certbot` and run this:
+The easiest way to get an SSL certificate, if you don't have one already, is to [install](https://certbot.eff.org/instructions) `certbot` and run this:
 
 ```bash
+# To use ECC for the private key, 
+# paste into /etc/letsencrypt/cli.ini:
+# key-type = ecdsa
+# elliptic-curve = secp384r1
+
 $ sudo certbot -d your.server.name
 ```
+[Automated renewal](https://eff-certbot.readthedocs.io/en/stable/using.html#automated-renewals) is usually preconfigured.
+
+If using Cloudflare, configure instead the edge and origin certificates in dashboard. In case you’re already running a website on the same Apache server, you can just copy-and-paste the SSL configuration from your main virtual host on port 443 into the above-mentioned vhost.
 
 ## You're done!
 
@@ -294,6 +330,8 @@ You can also use these commands as a quick health check.
 
 ```bash
 $ curl https://your.server.name/_matrix/client/versions
+
+# If using port 8448
 $ curl https://your.server.name:8448/_matrix/client/versions
 ```