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varnish config/docs (#342)

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Co-authored-by: Mark Felder <feld@feld.me>
Co-authored-by: FloatingGhost <hannah@coffee-and-dreams.uk>
Reviewed-on: https://akkoma.dev/AkkomaGang/akkoma/pulls/342
This commit is contained in:
floatingghost 2022-12-05 13:39:27 +00:00
parent d55de5debf
commit c62e1e3ad5
7 changed files with 119 additions and 88 deletions
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104
docs/Pipfile.lock generated
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@ -19,7 +19,7 @@
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@ -27,7 +27,7 @@
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@ -66,15 +66,16 @@
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@ -127,7 +128,7 @@
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@ -140,26 +141,26 @@
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@ -167,16 +168,16 @@
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@ -237,7 +238,7 @@
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@ -245,7 +246,7 @@
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"version": "==0.1"
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@ -266,42 +267,45 @@
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0
docs/docs/configuration/howto_ejabberd.md → docs/docs/configuration/integrations/howto_ejabberd.md
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0
docs/docs/configuration/howto_mongooseim.md → docs/docs/configuration/integrations/howto_mongooseim.md
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0
docs/docs/configuration/optimizing_beam.md → docs/docs/configuration/optimisation/optimizing_beam.md
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54
docs/docs/configuration/optimisation/varnish_cache.md Normal file
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@ -0,0 +1,54 @@
# Using a Varnish Cache
Varnish is a layer that sits between your web server and your backend application -
it does something similar to nginx caching, but tends to be optimised for speed over
all else.
To set up a varnish cache, first you'll need to install varnish.
This will vary by distribution, and since this is a rather advanced guide,
no copy-paste instructions are provided. It's probably in your distribution's
package manager, though. `apt-get install varnish` and so on.
Once you have varnish installed, you'll need to configure it to work with akkoma.
Copy the configuration file to the varnish configuration directory:
cp installation/akkoma.vcl /etc/varnish/akkoma.vcl
You may want to check if varnish added a `default.vcl` file to the same directory,
if so you can just remove it without issue.
Then boot up varnish, probably `systemctl start varnish` or `service varnish start`.
Now you should be able to `curl -D- localhost:6081` and see a bunch of
akkoma javascript.
Once that's out of the way, we can point our webserver at varnish. This
=== "Nginx"
upstream phoenix {
server 127.0.0.1:6081 max_fails=5 fail_timeout=60s;
}
=== "Caddy"
reverse_proxy 127.0.0.1:6081
Now hopefully it all works
If you get a HTTPS redirect loop, you may need to remove this part of the VCL
```vcl
if (std.port(server.ip) != 443) {
set req.http.X-Forwarded-Proto = "http";
set req.http.x-redir = "https://" + req.http.host + req.url;
return (synth(750, ""));
} else {
set req.http.X-Forwarded-Proto = "https";
}
```
This will allow your webserver alone to handle redirects.

8
docs/mkdocs.yml
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@ -7,7 +7,10 @@ theme:
font: false
logo: 'images/akko_badday.png'
features:
- tabs
- navigation.tabs
- toc.follow
- navigation.instant
- navigation.sections
palette:
primary: 'deep purple'
accent: 'blue grey'
@ -31,7 +34,8 @@ markdown_extensions:
- pymdownx.tasklist:
custom_checkbox: true
- pymdownx.superfences
- pymdownx.tabbed
- pymdownx.tabbed:
alternate_style: true
- pymdownx.details
- markdown_include.include:
base_path: docs

33
installation/akkoma.vcl
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@ -1,4 +1,5 @@
# Recommended varnishncsa logging format: '%h %l %u %t "%m %{X-Forwarded-Proto}i://%{Host}i%U%q %H" %s %b "%{Referer}i" "%{User-agent}i"'
# Please use Varnish 7.0+ for proper Range Requests / Chunked encoding support
vcl 4.1;
import std;
@ -22,11 +23,6 @@ sub vcl_recv {
set req.http.X-Forwarded-Proto = "https";
}
# CHUNKED SUPPORT
if (req.http.Range ~ "bytes=") {
set req.http.x-range = req.http.Range;
}
# Pipe if WebSockets request is coming through
if (req.http.upgrade ~ "(?i)websocket") {
return (pipe);
@ -53,12 +49,6 @@ sub vcl_backend_response {
return (retry);
}
# CHUNKED SUPPORT
if (bereq.http.x-range ~ "bytes=" && beresp.status == 206) {
set beresp.ttl = 10m;
set beresp.http.CR = beresp.http.content-range;
}
# Bypass cache for large files
# 50000000 ~ 50MB
if (std.integer(beresp.http.content-length, 0) > 50000000) {
@ -106,25 +96,12 @@ sub vcl_pipe {
}
}
sub vcl_hash {
# CHUNKED SUPPORT
if (req.http.x-range ~ "bytes=") {
hash_data(req.http.x-range);
unset req.http.Range;
}
}
sub vcl_backend_fetch {
# Be more lenient for slow servers on the fediverse
if (bereq.url ~ "^/proxy/") {
set bereq.first_byte_timeout = 300s;
}
# CHUNKED SUPPORT
if (bereq.http.x-range) {
set bereq.http.Range = bereq.http.x-range;
}
if (bereq.retries == 0) {
# Clean up the X-Varnish-Backend-503 flag that is used internally
# to mark broken backend responses that should be retried.
@ -143,14 +120,6 @@ sub vcl_backend_fetch {
}
}
sub vcl_deliver {
# CHUNKED SUPPORT
if (resp.http.CR) {
set resp.http.Content-Range = resp.http.CR;
unset resp.http.CR;
}
}
sub vcl_backend_error {
# Retry broken backend responses.
set bereq.http.X-Varnish-Backend-503 = "1";