Function Compute (FC 3.0) Serverless Devs

---

name: alicloud-compute-fc-serverless-devs

description: Alibaba Cloud Function Compute (FC 3.0) skill for installing and using Serverless Devs to create, deploy, invoke, and remove a Python function. Use when users need CLI-based FC quick start or Serverless Devs setup guidance.

version: 1.0.0

---

Category: tool

# Function Compute (FC 3.0) Serverless Devs

Goals

Quick Start Flow

1. Install Node.js (14+) and npm.

2. Install and validate Serverless Devs.

3. Configure credentials via guided setup.

4. Initialize example project and enter directory.

5. Deploy, invoke, and optionally remove.

Install Serverless Devs (npm)

Global install (requires sudo):

sudo npm install @serverless-devs/s -g
sudo s -v

No-sudo alternative (recommended in restricted environments):

npx -y @serverless-devs/s -v

Configure Credentials (guided)

sudo s config add

Choose `Alibaba Cloud (alibaba)`, provide `AccountID`, `AccessKeyID`, `AccessKeySecret`, and set alias.

Configure Credentials (command)

Use CLI args to configure credential alias in one command (non-interactive):

s config add -a default --AccessKeyID <AK> --AccessKeySecret <SK> -f

If using environment variables, inject them into the command (example):

s config add -a default -kl AccessKeyID,AccessKeySecret -il ${ALIBABA_CLOUD_ACCESS_KEY_ID},${ALIBABA_CLOUD_ACCESS_KEY_SECRET} -f

Or use Serverless Devs convention JSON environment variable (example):

export default_serverless_devs_key='{\"AccountID\":\"<AccountID>\",\"AccessKeyID\":\"<AK>\",\"AccessKeySecret\":\"<SK>\"}'

Reference in `s.yaml`:

access: default_serverless_devs_key

Initialize Example (Python)

sudo s init start-fc3-python
cd start-fc3-python

Initialization creates `s.yaml`, `code/`, and `readme.md`; edit `code/index.py` for function logic.

Deploy, Invoke, and Remove

sudo s deploy
sudo s invoke -e "test"
sudo s remove

Custom Domain Binding (Avoid Default Domain Forced Download)

> Note: FC default domain adds `Content-Disposition: attachment`, causing browser downloads.

> Use a custom domain to avoid this behavior.

Step 1: Configure CNAME for your domain

Configure DNS CNAME to FC public CNAME:

<account_id>.<region_id>.fc.aliyuncs.com

Example (Hangzhou region):

1629965279769872.cn-hangzhou.fc.aliyuncs.com

Note: if using apex domain (e.g. `animus.run`) and DNS provider does not support CNAME at apex,

use ALIAS/ANAME records, or switch to a subdomain such as `www.animus.run`.

Step 2: Create custom domain in Serverless Devs

Option A: add `fc3-domain` resource in `s.yaml`:

resources:
  newsDomain:
    component: fc3-domain
    props:
      region: cn-hangzhou
      domainName: animus.run
      protocol: HTTP
      routeConfig:
        routes:
          - functionName: honnold-taipei101-news
            qualifier: LATEST
            methods:
              - GET
              - HEAD
            path: /*

`region` is example default; ask user when the best region is unclear.

Then deploy:

printf 'y\n' | npx -y @serverless-devs/s deploy

Option B: use Console (Advanced Features > Custom Domains) to create and route custom domain.

Common Errors

References

- https://www.alibabacloud.com/help/en/functioncompute/fc/user-guide/http-triggers-overview

- https://www.alibabacloud.com/help/en/functioncompute/fc/user-guide/configure-custom-domain-names

Validation

mkdir -p output/alicloud-compute-fc-serverless-devs
echo "validation_placeholder" > output/alicloud-compute-fc-serverless-devs/validate.txt

Pass criteria: command exits 0 and `output/alicloud-compute-fc-serverless-devs/validate.txt` is generated.

Output And Evidence

Prerequisites

Workflow

1) Confirm user intent, region, identifiers, and whether the operation is read-only or mutating.

2) Run one minimal read-only query first to verify connectivity and permissions.

3) Execute the target operation with explicit parameters and bounded scope.

4) Verify results and save output/evidence files.