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Self-hosted edge cache on a dedicated Incus container, sits between clients and the MinIO EC:2 cluster. Replaces the need for an external CDN at v1.0 traffic levels — handles thousands of concurrent listeners on the R720, leaks zero logs to a third party. This is the phase-1 alternative documented in the v1.0.9 CDN synthesis : phase-1 = self-hosted Nginx, phase-2 = 2 cache nodes + GeoDNS, phase-3 = Bunny.net via the existing CDN_* config (still inert with CDN_ENABLED=false). - infra/ansible/roles/nginx_proxy_cache/ : install nginx + curl, render nginx.conf with shared zone (128 MiB keys + 20 GiB disk, inactive=7d), render veza-cache site that proxies to the minio_nodes upstream pool with keepalive=32. HLS segments cached 7d via 1 MiB slice ; .m3u8 cached 60s ; everything else 1h. - Cache key excludes Authorization / Cookie (presigned URLs only in v1.0). slice_range included for segments so byte-range requests with arbitrary offsets all hit the same cached chunks. - proxy_cache_use_stale error timeout updating http_500..504 + background_update + lock — survives MinIO partial outages without cold-storming the origin. - X-Cache-Status surfaced on every response so smoke tests + operators can verify HIT/MISS without parsing access logs. - stub_status bound to 127.0.0.1:81/__nginx_status for the future prometheus nginx_exporter sidecar. - infra/ansible/playbooks/nginx_proxy_cache.yml : provisions the Incus container + applies common baseline + role. - inventory/lab.yml : new nginx_cache group. - infra/ansible/tests/test_nginx_cache.sh : MISS→HIT roundtrip via X-Cache-Status, on-disk entry verification. Acceptance : smoke test reports MISS then HIT for the same URL ; cache directory carries on-disk entries. No backend code change — the cache is transparent. To route through it, flip AWS_S3_ENDPOINT=http://nginx-cache.lxd:80 in the API env. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> |
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