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configs.nix-farm: keep connections to B2 alive
author
lassulus
date
(Oct 12, 2026, 10:56 PM CEST)
commit
aa738643
aa7386432751be002411ee8a170eb00068d547a3
parent
18edbf04
18edbf04f93231e709a5bb44227b6ce3ec4d2b1b
+8
+8
configs/nix-farm/cache.nix
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configs/nix-farm/cache.nix
···
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# decodes them via the narinfo's Compression field.
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# `resolve`: looked up at runtime via resolved's stub, so an unresolvable
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# B2 at startup doesn't keep nginx (and every other vhost) from starting.
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# `keepalive` + HTTP/1.1 below: reuse TLS connections to B2. Without them
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# nginx spoke HTTP/1.0 with a new handshake per request; at a farm run's
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# ~400 req/s B2 started closing connections mid-response.
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services.nginx.appendHttpConfig = ''
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upstream cache_lassul_us_b2 {
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zone cache_lassul_us_b2 64k;
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resolver 127.0.0.53 ipv6=off;
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server ${endpoint}:443 resolve;
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keepalive 64;
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keepalive_requests 10000;
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keepalive_timeout 60s;
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}
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map $uri $cache_lassul_us_encoding {
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default "";
···
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proxy_set_header Host ${endpoint};
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proxy_ssl_server_name on;
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proxy_ssl_name ${endpoint};
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proxy_http_version 1.1;
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proxy_set_header Connection "";
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# cache keys never have a query string; don't forward one to S3
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set $args "";
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# S3 answers 403 for keys missing from a bucket it won't list