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Tenant Isolation
build-and-publish / build (Raccoon, ubuntu:26.04, NEXUS_PASS_RACCOON, NEXUS_REPO_RACCOON, NEXUS_USER_RACCOON, raccoon) (push) Failing after 3m3s
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build-and-publish / build (Trixie, debian:13, NEXUS_PASS_TRIXIE, NEXUS_REPO_TRIXIE, NEXUS_USER_TRIXIE, trixie) (push) Failing after 2m48s
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theraw
2026-07-02 15:18:19 +00:00
parent 9675c00f99
commit a7b12c773e
1 changed files with 15 additions and 7 deletions
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README.md
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@@ -77,7 +77,15 @@ LUA RESTY CORE SCRIPTS = /usr/nginx_lua
Confines each site's **static** file serving to its own `root` directory. A symlink, `..`,
magic-link or cross-tenant path that escapes the site tree (e.g. a symlink to `/etc/passwd`)
is refused with **403**, kernel-enforced via `openat2(RESOLVE_BENEATH)`.
**On by default — no vhost config needed.** In-tree symlinks still work.
**On by default, no vhost config needed.** In-tree symlinks still work.
**Where the config lives (nothing to add on a fresh install)**
- `tenant_isolation` is compiled **default-on**, so it applies to every site with no directive.
- The `disable_symlinks if_not_owner from=$document_root;` backstop ships in the `http { }`
block of `/nginx/nginx.conf`, so **every** vhost inherits it. Do not add it per-site.
- Your site configs live in `/nginx/live/*` and inherit both layers automatically.
- Upgrading an old install that kept its own `/nginx/nginx.conf`? Add that one
`disable_symlinks` line to its `http { }` block once (or re-run `postfix` to refresh the config).
**Covered**
- Static files served by nginx (the normal file path).
@@ -85,13 +93,13 @@ is refused with **403**, kernel-enforced via `openat2(RESOLVE_BENEATH)`.
covers `gzip_static`, `autoindex`, `dav`, `mp4`/`flv`.
**Not covered**
- Dynamic content (PHP-FPM / NGINX Unit) — isolated separately per tenant (user / cgroup / namespace).
- Not fully race-free: a narrow probe→open timing window remains (closing it fully would
break `open_file_cache`), so it's *mitigated* by the `disable_symlinks` backstop, not eliminated.
- Dynamic content (PHP-FPM / NGINX Unit) is isolated separately per tenant (user / cgroup / namespace).
- Not fully race-free: a narrow probe->open timing window remains (closing it fully would
break `open_file_cache`), so it is *mitigated* by the `disable_symlinks` backstop, not eliminated.
**Optional per-vhost tuning**
- `tenant_isolation off;` — turn it off for a `server`/`location`.
- `tenant_isolation_root /home/<user>;` — widen the confinement root to the tenant home
- `tenant_isolation off;` turns it off for a `server`/`location`.
- `tenant_isolation_root /home/<user>;` widens the confinement root to the tenant home
(allows above-docroot in-tree symlinks, e.g. Laravel's `storage`).
## How to install lua scripts
@@ -108,7 +116,7 @@ nginx -s reload
| Area | Twiy | Vanilla nginx | Why |
|---|---|---|---|
| TLS handshake throughput | **+5–15%** | baseline | AWS-LC's tuned AES/ChaCha asm vs OpenSSL |
| TLS handshake throughput | **+5-15%** | baseline | AWS-LC's tuned AES/ChaCha asm vs OpenSSL |
| WAF, Lua, HTTP/3 | included | not included | needs custom build |
# Support options.