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Add TL;DR and final step details to ACME

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Andrew Morgan 2019-02-05 17:04:34 +00:00
parent 56cb34ba8b
commit a6345009f9
1 changed files with 20 additions and 4 deletions
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docs/ACME.md
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@ -39,13 +39,23 @@ placed in Synapse's config directory without the need for any ACME setup.
## ACME setup
The main steps for enabling ACME support in short summary are:
1. Allow Synapse to listen on port 80 with authbind, or forward it from a reverse-proxy.
1. Set `acme:enabled` to `true` in homeserver.yaml.
1. Move your old certificates (files `example.com.tls.crt` and `example.com.tls.key` out of the way if they currently exist at the paths specified in `homeserver.yaml`.
1. Restart Synapse
Detailed instructions for each step are provided below.
### Listening on port 80
In order for Synapse to complete the ACME challenge to provision a
certificate, it needs access to port 80. Typically listening on port 80 is
only granted to applications running as root. There are thus two solutions to
this problem.
### Using a reverse proxy
#### Using a reverse proxy
A reverse proxy such as Apache or nginx allows a single process (the web
server) to listen on port 80 and proxy traffic to the appropriate program
@ -70,7 +80,7 @@ ProxyPass /.well-known/acme-challenge http://localhost:8009/.well-known/acme-cha
Make sure to restart/reload your webserver after making changes.
### Authbind
#### Authbind
`authbind` allows a program which does not run as root to bind to
low-numbered ports in a controlled way. The setup is simpler, but requires a
@ -98,9 +108,9 @@ When Synapse is started, use the following syntax::
authbind --deep <synapse start command>
```
## Config file editing
### Config file editing
Finally, once Synapse is able to listen on port 80 for ACME challenge
Once Synapse is able to listen on port 80 for ACME challenge
requests, it must be told to perform ACME provisioning by setting `enabled`
to true under the `acme` section in `homeserver.yaml`:
@ -108,3 +118,9 @@ to true under the `acme` section in `homeserver.yaml`:
acme:
enabled: true
```
### Starting synapse
Ensure that the certificate paths specified in `homeserver.yaml` (`tls_certificate_path` and `tls_private_key_path`) do not currently point to any files. Synapse will not provision certificates if files exist, as it does not want to overwrite existing certificates.
Finally, start/restart Synapse.