Charles Bochet
203da78b05
## Problem When several Twenty instances run in the **same AWS account + region** (our customer's setup), their logic-function Lambda resources collide. Four shared resources are named purely from a content hash: | Resource | Name | Derived from | |---|---|---| | Builder fn | `twenty-builder-<sha256(handler)>` | handler code (⇒ version) | | Yarn-install fn | `twenty-yarn-install-<sha256(handler)>` | handler code | | Common layer | `twenty-common-layer-<sha256(pkg+lock)>` | dependencies | | Deps layer | `deps-<yarnLockChecksum>` | app yarn.lock | Because the hash is identical across instances of the same version, every instance computes the **same name**. `ensureBuilderLambdaExists` / `ensureYarnInstallLambdaExists` do `GetFunction → if it exists, return` with **no role check**, so the first instance to create the function binds it to *its* `LOGIC_FUNCTION_LAMBDA_ROLE` and every other instance silently reuses it. When that role is later deleted or belongs to a different account, invokes fail with: > The role defined for the function cannot be assumed by Lambda. Nothing tears these shared resources down, so a poisoned function persists indefinitely. (Executors are UUID-named and SDK layers are workspace-scoped, so they don't collide.) ## Fix Namespace the four shared resources by a per-instance segment. - New optional config var **`LOGIC_FUNCTION_LAMBDA_RESOURCE_NAMESPACE`** (LOGIC_FUNCTION_CONFIG group). - When unset it defaults to `sha256(LOGIC_FUNCTION_LAMBDA_ROLE).slice(0, 10)`. Keying the namespace on the execution role makes the sharing boundary correct: - **same role → same names →** instances still dedupe (original intent preserved), - **different role → different names →** full isolation, invoke can never hit a role it can't assume, - **role change →** resources are recreated fresh under a new name (self-healing). Names become `twenty-builder-<namespace>-<checksum>`, `deps-<namespace>-<checksum>`, etc. — the owning instance stays legible in the AWS console. ### Defensive role-heal As a safety net (and to heal already-poisoned functions), after `GetFunction` succeeds we compare `Configuration.Role` to the configured role; on mismatch we delete and recreate the tool function. (`waitFunctionDeleted` polls `GetFunction` until `ResourceNotFoundException` — this SDK version has no `waitUntilFunctionNotExists` waiter.) ## Scope / compatibility - Executor functions (`<logicFunctionId>`) and SDK layers (`sdk-<workspaceId>-<appUUID>`) are unchanged — already unique. - On upgrade, shared-resource names change once (role-hash namespace), so each instance recreates its builder/yarn-install/common-layer/deps on first use; old ones are orphaned (harmless, unreferenced). - Operators who want explicit control can set `LOGIC_FUNCTION_LAMBDA_RESOURCE_NAMESPACE`. ## Ops note (immediate unblock, independent of this PR) Delete the poisoned `twenty-builder-<hash>` (and sibling `twenty-yarn-install-*`) in the affected region; it is recreated with the correct role on next use. ## Tests - `compute-hashed-lambda-resource-name.util.spec.ts` — namespace segment behavior - `get-lambda-deps-layer-name.util.spec.ts` — namespaced deps layer name - `get-lambda-resource-namespace.util.spec.ts` — stable, role-distinct namespace All pass; `lint:diff-with-main` clean; typecheck clean for changed files. <!-- This is an auto-generated description by cubic. --> <a href="https://cubic.dev/pr/twentyhq/twenty/pull/22509?utm_source=github" target="_blank" rel="noopener noreferrer" data-no-image-dialog="true"><picture><source media="(prefers-color-scheme: dark)" srcset="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"><source media="(prefers-color-scheme: light)" srcset="https://www.cubic.dev/buttons/review-in-cubic-light.svg"><img alt="Review in cubic" src="https://www.cubic.dev/buttons/review-in-cubic-dark.svg"></picture></a> <!-- End of auto-generated description by cubic. -->
The #1 Open-Source CRM
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Why Twenty
Twenty gives technical teams the building blocks for a custom CRM that meets complex business needs and quickly adapts as the business evolves. Twenty is the CRM you build, ship, and version like the rest of your stack.
Learn more about why we built Twenty
Installation
Cloud
The fastest way to get started. Sign up at twenty.com and spin up a workspace in under a minute, with no infrastructure to manage and always up to date.
Build an app
Scaffold a new app with the Twenty CLI:
npx create-twenty-app my-app
Define objects, fields, and views as code:
import { defineObject, FieldType } from 'twenty-sdk/define';
export default defineObject({
nameSingular: 'deal',
namePlural: 'deals',
labelSingular: 'Deal',
labelPlural: 'Deals',
fields: [
{ name: 'name', label: 'Name', type: FieldType.TEXT },
{ name: 'amount', label: 'Amount', type: FieldType.CURRENCY },
{ name: 'closeDate', label: 'Close Date', type: FieldType.DATE_TIME },
],
});
Then ship it to your workspace:
npx twenty app:publish --private
See the app development guide for objects, views, agents, and logic functions.
Self-hosting
Run Twenty on your own infrastructure with Docker Compose, or contribute locally via the local setup guide.
Everything you need
Twenty gives you the building blocks of a modern CRM (objects, views, workflows, and agents) and lets you extend them as code. Here's a tour of what's in the box.
Want to go deeper? Read the 
User Guide for product walkthroughs, or the Documentation for developer reference.
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TypeScript
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NestJS, with BullMQ, 
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React, with Jotai, Linaria and Lingui
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Thanks to these amazing services that we use and recommend for code review (Greptile), catching bugs (Sentry) and translating (Crowdin).
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