25 lines
1.3 KiB
Markdown
25 lines
1.3 KiB
Markdown
# Entry-Point Runtime — Nginx
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## Signals to gather
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- `argv0` equals `nginx`.
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- Config files: `/etc/nginx/nginx.conf`, `conf.d/*.conf`, `/usr/share/nginx/html`.
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- Environment (`NGINX_ENTRYPOINT_QUIET_LOGS`, `NGINX_PORT`, `NGINX_ENVSUBST_TEMPLATE`).
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- Listening sockets on 80/443 (dynamic mode) or `EXPOSE 80` (static).
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- Modules or scripts shipped with the official Docker entrypoint (`docker-entrypoint.sh` collapsing to `nginx -g "daemon off;"`).
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## Implementation notes
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- Parse `nginx.conf` (basic directive traversal) to extract worker processes, include chains, upstream definitions.
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- Handle official entrypoint idioms (`envsubst` templating) via ShellFlow.
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- Distinguish pure reverse proxies from PHP-FPM combos; when both `nginx` and `php-fpm` run, classify container as `Supervisor`.
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- Record static web content presence (`/usr/share/nginx/html/index.html`).
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## Evidence & scoring
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- Boost for confirmed config and workers.
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- Add evidence for templating features, env substitution, or modules.
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- Penalise if binary exists without config (likely not the entry point).
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## Edge cases
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- Alpine images may place configs under `/etc/nginx/conf.d`; include both.
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- Custom builds might rename binary (`openresty`, `tengine`); consider aliases if common.
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- Windows Nginx not supported; fall back to `Other`.
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