strapi-plugin-multitenancy

PostgreSQL schema-per-tenant isolation for Strapi 5. Identifies tenants via subdomain, propagates context through AsyncLocalStorage, and proxies Strapi's DB layer to route all ORM queries to the correct PostgreSQL schema — with zero changes to your content types or API.

Overview

strapi-plugin-multitenancy provides physical data isolation between tenants using PostgreSQL schemas. Each tenant gets its own schema (e.g., acme, globex) containing isolated copies of all content tables. System tables (admin_*, strapi_*, auth roles/permissions, and i18n locales) are automatically mapped as views pointing to the public schema, keeping administration centralized.

Key characteristics:

• Zero query changes — Strapi's ORM generates qualified SQL ("acme"."articles") transparently via a proxy on db.getSchemaName()
• Subdomain-based routing — tenant resolved from Host, Origin, or Referer headers
• In-memory cache — configurable TTL for tenant lookups to minimize DB round-trips
• Admin UI — manage tenants (create, edit, delete, sync) directly from the Strapi dashboard
• Schema sync — add new content-type tables to all existing tenant schemas with one click or API call

Architecture

Request: acme.myapp.com → POST /api/articles
          │
          ▼
┌─────────────────────────────┐
│  plugin::multitenancy       │
│  tenant-resolver middleware  │
│                             │
│  1. Extract subdomain       │
│     "acme" from Host header │
│                             │
│  2. Look up tenant in       │
│     public.multitenancy_    │
│     tenants (with cache)    │
│                             │
│  3. tenantContext.run(      │
│       tenant, next          │  ← AsyncLocalStorage wraps the
│     )                       │    entire request lifecycle
└─────────────┬───────────────┘
              │
              ▼
┌─────────────────────────────┐
│  strapi-db-proxy            │
│                             │
│  db.getSchemaName() →       │
│    returns "acme"           │  ← All ORM queries now use
│    (from AsyncLocalStorage) │    "acme"."articles" etc.
└─────────────┬───────────────┘
              │
              ▼
┌─────────────────────────────┐
│  PostgreSQL                 │
│                             │
│  public schema:             │
│    multitenancy_tenants     │  ← control table
│    admin_*, strapi_*        │  ← shared system tables
│                             │
│  acme schema:               │
│    articles                 │  ← real isolated table
│    admin_users (VIEW)       │  ← view → public.admin_users
│    strapi_* (VIEWs)        │
└─────────────────────────────┘

Schema layout per tenant

Requirements

SQLite and MySQL are not supported. Schema isolation requires PostgreSQL.

Installation

# npm
npm install strapi-plugin-multitenancy

# yarn
yarn add strapi-plugin-multitenancy

1. Register the plugin

In config/plugins.ts (or .js):

export default () => ({
  multitenancy: {
    enabled: true,
    resolve: './src/plugins/multitenancy', // if installed locally
    // resolve is not needed if installed from npm
    config: {
      rootDomain: env('ROOT_DOMAIN', 'myapp.com'),      // Required: your root domain
      requireTenant: false,          // Optional: block requests without a tenant
      cacheTtlMs: 10_000,           // Optional: tenant cache TTL in ms (default 10s)
      autoSyncOnBootstrap: false,    // Optional: sync all schemas on every startup
      debug: false,                  // Optional: enable verbose plugin logs
    },
  },
});

2. Register the middleware

In config/middlewares.ts, add plugin::multitenancy.tenant-resolver before strapi::query:

export default [
  'strapi::logger',
  'strapi::errors',
  'strapi::security',
  'strapi::cors',
  'strapi::poweredBy',
  'plugin::multitenancy.tenant-resolver', // ← add here
  'strapi::query',                        // ← tenant-resolver must come BEFORE this
  'strapi::body',
  'strapi::session',
  'strapi::favicon',
  'strapi::public',
];

Critical: The tenant-resolver middleware must be positioned before strapi::query in the middleware stack. If placed after, the DB schema proxy will not be active when queries execute.

3. Set environment variables

In your .env:

ROOT_DOMAIN=myapp.com

Or configure it directly via config/plugins.ts using the rootDomain option (takes precedence over the env var).

Configuration Options

Reverse Proxy & Security

Enable trust proxy

If Strapi runs behind a reverse proxy (nginx, Caddy, AWS ALB, etc.), enable proxy trust so the Host header is correctly forwarded:

In config/server.ts:

export default ({ env }) => ({
  proxy: true,  // ← required when behind a reverse proxy
  app: {
    keys: env.array('APP_KEYS'),
  },
});

Without proxy: true, ctx.request.hostname may return the internal address instead of the real subdomain.

Cross-origin requests (CORS)

When the frontend and API are on different subdomains (e.g., acme.myapp.com and api.myapp.com), the plugin falls back to the Origin or Referer header for tenant resolution. Ensure your CORS configuration allows these origins:

// config/middlewares.ts
{
  name: 'strapi::cors',
  config: {
    origin: (ctx) => {
      // Allow all subdomains of your root domain
      const origin = ctx.request.headers.origin || '';
      if (origin.endsWith('.myapp.com')) return origin;
      return false;
    },
    credentials: true,
  },
},

Admin UI

After installation, a Multitenancy section appears in the Strapi admin Settings panel.

Deleting a tenant schema

Deleting a tenant via the UI only marks it as inactive. To also drop the PostgreSQL schema (irreversible), call the API directly:

DELETE /multitenancy/tenants/:slug?dropSchema=true

REST API

All endpoints are protected by Strapi admin authentication and accessible under the /multitenancy prefix.

Create tenant request body

{
  "slug": "acme",
  "name": "Acme Corp",
  "schema": "acme"
}

• slug: lowercase letters, numbers, and hyphens only ([a-z0-9-]+). Used as the subdomain identifier. Can be changed after creation.
• name: display name, can contain any characters.
• schema: lowercase letters, numbers, underscores, and hyphens only ([a-z0-9_-]+). Becomes the PostgreSQL schema name. Immutable after creation.

Update tenant request body

{
  "name": "Acme Corporation",
  "slug": "acme-new"
}

Both name and slug are required. The schema field cannot be updated.

Services API

You can access the plugin services from your own code:

// Get the active tenant from within a request context
const tenantContext = require('strapi-plugin-multitenancy/server/context/tenant-context');
const tenant = tenantContext.getTenant(); // { slug, name, schema, ... } | null

// Tenant management
const tenantManager = strapi.plugin('multitenancy').service('tenantManager');
await tenantManager.createTenant({ slug: 'acme', name: 'Acme Corp', schema: 'acme' });
await tenantManager.getTenant('acme');               // lookup by current slug
await tenantManager.getAllTenants();
await tenantManager.updateTenant('acme', { name: 'Acme Corp', slug: 'acme-new' }); // slug is optional
await tenantManager.deleteTenant('acme', { dropSchema: false });

// Schema management
const schemaManager = strapi.plugin('multitenancy').service('schemaManager');
await schemaManager.createSchema('acme');
await schemaManager.syncSchema('acme');
await schemaManager.syncAllSchemas();
await schemaManager.dropSchema('acme'); // irreversible!

How Schema Isolation Works

When a new tenant acme is created:

1. CREATE SCHEMA IF NOT EXISTS "acme" is executed.
2. All content tables from public are cloned: CREATE TABLE "acme"."articles" (LIKE public."articles" INCLUDING ALL).
3. Foreign keys between content tables are replicated within the acme schema.
4. System tables (admin_*, strapi_*, up_roles, up_permissions, i18n_locale) are created as VIEWs pointing to public.

When a request comes in from acme.myapp.com:

1. tenant-resolver extracts acme from the Host header.
2. Looks up the tenant in public.multitenancy_tenants (cached).
3. Wraps the request in tenantContext.run(tenant, next).
4. The overridden db.getSchemaName() returns "acme" for the duration of the request.
5. Strapi's Knex ORM generates SELECT * FROM "acme"."articles" instead of "public"."articles".

Schema Sync

When you add a new content type to Strapi, the new table is created in the public schema. To propagate it to all tenant schemas:

• Via UI: Settings → Multitenancy → click Sync schemas
• Via API: POST /multitenancy/sync
• On startup: Set autoSyncOnBootstrap: true in the plugin config

The sync operation is idempotent — it only adds missing tables and columns; it never drops or modifies existing data.

Limitations

• PostgreSQL only — the schema isolation mechanism requires PostgreSQL.
• Nested subdomains not supported — a.b.myapp.com is rejected; only single-level subdomains (a.myapp.com) are recognized.
• Schema name is immutable — the PostgreSQL schema name cannot be changed after creation. Create a new tenant and migrate data if renaming is needed.
• Slug is mutable — changing a tenant's slug changes its subdomain identifier. Existing sessions or cached links to the old subdomain will break until updated.
• No data migration tools — cross-tenant data migration is out of scope; use standard PostgreSQL tools (pg_dump, INSERT INTO ... SELECT).

Contributing

Contributions are welcome. Please open an issue to discuss your proposal before submitting a pull request.

git clone https://github.com/veloso/strapi-plugin-multitenancy.git
cd strapi-plugin-multitenancy

License

MIT © Veloso