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varnish throttle

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This commit is contained in:
Mateusz Gruszczyński
2025-09-24 16:02:48 +02:00
parent 56c02e072d
commit 9a7660fdf7
1 changed files with 40 additions and 16 deletions
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56
deploy/varnish/default.vcl.template
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@@ -1,6 +1,7 @@
vcl 4.1;
import vsthrottle;
import std;
backend app {
.host = "app";
@@ -10,8 +11,8 @@ backend app {
acl purge { "localhost"; "127.0.0.1"; }
sub vcl_recv {
# RATE LIMIT: 10 żądań / 10s, po przekroczeniu blokada na 30s
if (vsthrottle.is_denied(client.identity, 10, 10s, 30s)) {
# RATE LIMIT: 100 żądań / 10s, po przekroczeniu blokada na 60s
if (vsthrottle.is_denied(client.identity, 100, 10s, 60s)) {
return (synth(429, "Too Many Requests"));
}
@@ -36,31 +37,54 @@ sub vcl_recv {
}
sub vcl_backend_response {
if (bereq.url ~ "^/static/" || bereq.url ~ "\.(css|js|png|jpg|svg|ico|woff2?)$") {
set beresp.ttl = 24h;
# Treści prywatne / zakazane do cache
if (beresp.http.Cache-Control ~ "(?i)no-store|private") {
set beresp.uncacheable = true;
set beresp.ttl = 0s;
return;
}
# Preferuj s-maxage (cache współdzielony), potem max-age
if (beresp.http.Cache-Control ~ "(?i)s-maxage=([0-9]+)") {
set beresp.ttl = std.duration(regsub(beresp.http.Cache-Control, ".*(?i)s-maxage=([0-9]+).*", "\1") + "s", 0s);
} else if (beresp.http.Cache-Control ~ "(?i)max-age=([0-9]+)") {
set beresp.ttl = std.duration(regsub(beresp.http.Cache-Control, ".*(?i)max-age=([0-9]+).*", "\1") + "s", 0s);
} else if (beresp.http.Expires) {
# fallback na Expires
set beresp.ttl = std.duration(std.timestamp2s(beresp.http.Expires) - std.now(), 0s);
} else {
if (beresp.http.Cache-Control ~ "no-cache|no-store|private") {
set beresp.uncacheable = true;
set beresp.ttl = 0s;
} else {
set beresp.ttl = 60s; # domyślny TTL
}
# ostateczny fallback
set beresp.ttl = 60s;
}
# Jeśli immutable – zwiększ grace (serwuj „stale” dłużej przy problemach z backendem)
if (beresp.http.Cache-Control ~ "(?i)immutable") {
set beresp.grace = 1h; # dostosuj wg potrzeb
set beresp.keep = 24h; # dłuższe trzymanie w storage na trafienia „stale-if-error”
}
# (opcjonalnie) statykom daj minimalne TTL, gdy backend NIE ustawił CC
if ((bereq.url ~ "^/static/" || bereq.url ~ "\.(css|js|png|jpg|svg|ico|woff2?)$")
&& !(beresp.http.Cache-Control ~ "(?i)(s-maxage|max-age)")) {
set beresp.ttl = 24h;
}
}
sub vcl_deliver {
if (obj.hits > 0) {
set resp.http.X-Cache = "HIT";
} else {
set resp.http.X-Cache = "MISS";
# ukryhe niepotrzebny nagłówek z MISS
#} else {
# set resp.http.X-Cache = "MISS";
}
# Nagłówki rate limit – MUSZĄ używać tej samej czwórki parametrów co is_denied()
set resp.http.X-RateLimit-Limit = "10";
set resp.http.X-RateLimit-Window = "10s";
set resp.http.X-RateLimit-Remaining = vsthrottle.remaining(client.identity, 10, 10s, 30s);
set resp.http.Retry-After = vsthrottle.blocked(client.identity, 10, 10s, 30s);
#set resp.http.X-RateLimit-Limit = "10";
#set resp.http.X-RateLimit-Window = "10s";
#set resp.http.X-RateLimit-Remaining = vsthrottle.remaining(client.identity, 10, 10s, 30s);
#set resp.http.Retry-After = vsthrottle.blocked(client.identity, 10, 10s, 30s);
unset resp.http.Via;
unset resp.http.X-Varnish;