Serverless 多函数开发示例

$ npm install serverless -g

$ npm update serverless -g

$ npm update serverless -g

.├── README.md├── index.js└── serverless.yml

component: vpc # [必选]要使用组件，更多组件请查看 https://github.com/serverless-componentsname: sls-demo-msn-vpc # [必选]组件实例名称
inputs:  region: ap-guangzhou # 实例所属地区  zone: ap-guangzhou-2 # 实例所属地区区域  vpcName: ${name} # 实例名称，这里复用字段 name 作为名称。  subnetName: sls-demo-msn-subnet # 子网的名称

component: postgresql #(必填) 引用 component 的名称，当前用到的是 postgresql 组件name: sls-demo-msn-DB # (必填) 该 postgresql 组件创建的实例名称
inputs:  region: ap-guangzhou # 实例所属地区  zone: ap-guangzhou-2 # 实例所属地区区域  dBInstanceName: ${name}-${stage} # 数据库实例名称唯一，且同一个数据库只能存在同一个vpc内。  extranetAccess: true # 是否开启实例外网访问  vpcConfig: # vpc网络配置    vpcId: ${output:${stage}:${app}:sls-demo-msn-vpc.vpcId} # 私有网络Id    subnetId: ${output:${stage}:${app}:sls-demo-msn-vpc.subnetId} # 子网Id

app: sls-demo-msn-todo-3e5a2134 # 应用唯一识别标识，同账号下需要保持唯一。stage: dev # 应用部署环境名称，这里使用环境变量 STAGE 的值。

.├── README.md├── db # 数据库│   └── serverless.yml # 数据库配置文件├── serverless.yml├── src # 多函数应用│   ├── node_modules│   ├── package-lock.json│   ├── package.json # Node.js依赖文件│   ├── serverless.yml # 多函数应用配置文件│   └── todos.js # todo 应用主文件└── vpc # vpc    └── serverless.yml # vpc配置文件

component: multi-scfname: sls-demo-msn
inputs:  src:    src: ./    exclude:      - .env      - "node_modules/**" # 部署时忽略node_modules目录中所有文件，以加快部署速度  environments: # 应用环境变量信息    - key: PG_CONNECT_STRING      value: ${output:${stage}:${app}:sls-demo-msn-DB.private.connectionString}  region: ap-guangzhou  runtime: Nodejs12.16  memorySize: 128  vpc: # vpc网络配置    vpcId: ${output:${stage}:${app}:sls-demo-msn-vpc.vpcId} # 私有网络Id    subnetId: ${output:${stage}:${app}:sls-demo-msn-vpc.subnetId} # 子网Id  installDependency: true # 是否在线安装依赖  timeout: 6 # 默认超时时间（秒）  functions: # 多函数定义    allTodo: # 函数别名      handler: todos.all # 处理函数      memorySize: 256 # 自定义次函数的内存空间    addTodo:      handler: todos.add      timeout: 9 # 自定义此函数的超时时间（秒）    completeTodo:      handler: todos.comp      timeout: 9  triggers: # 触发器配置    - type: apigw      parameters:        name: todosAPIGW        protocols:          - https          - http        apis: # API配置          - path: /todos/ # 路由路径            method: GET # 路由方法            function: allTodo # 路由处理函数别名          - path: /todos/            method: POST            function: addTodo          - path: /todos/{id}/actions/complete            method: POST            function: completeTodo            param: # 动态路由参数配置              - name: id                position: PATH                required: true                type: number                desc: Todo ID

"use strict";const { Client } = require("pg");
const client = new Client({  connectionString: process.env.PG_CONNECT_STRING,});
/** * 初始化数据库和表结构 */const initDB = async () => {  const isConnected = client && client._connected;
  if (!isConnected) {    await client.connect();
    await client.query(`    CREATE TABLE IF NOT EXISTS todo (      ID              SERIAL          NOT NULL,      TITLE           VARCHAR         NOT NULL,      NOTE            TEXT,      IS_COMPLETE     BOOLEAN         DEFAULT FALSE    );`);  }};
/** * 获取所有Todo事项 */exports.all = async (event, context) => {  // async 需要关闭事件循环等待，以避免日志记录超时或函数无返回的问题。  context.callbackWaitsForEmptyEventLoop = false;  await initDB();
  const { rows } = await client.query({ text: "SELECT * FROM todo" });
  return {    message: "Tencent SCF execute successful!",    data: rows,  };};
/** * 添加新的Todo事项 */exports.add = async (event, context) => {  // async 需要关闭事件循环等待，以避免日志记录超时或函数无返回的问题。  context.callbackWaitsForEmptyEventLoop = false;  const { title, note } = JSON.parse(event.body);  if (!title) {    return {      statusCode: 400,      message: "Missing Todo Title",    };  }
  await initDB();  const { rowCount } = await client.query({    text: "INSERT INTO todo (title, note) VALUES($1, $2)",    values: [title, note],  });
  return rowCount === 1    ? {        statusCode: 201,        message: "Todo added success.",      }    : {        statusCode: 400,        message: "Todo added failed.",      };};
/** * 完成指定Todo事项 */exports.comp = async (event, context) => {  // async 需要关闭事件循环等待，以避免日志记录超时或函数无返回的问题。  context.callbackWaitsForEmptyEventLoop = false;  const todoId = event.pathParameters.id;
  if (!todoId && !isNaN(todoId)) {    return {      statusCode: 400,      message: "Missing Todo Id",    };  }
  await initDB();  const { rowCount } = await client.query({    text: "UPDATE todo SET is_complete = true WHERE id=$1",    values: [todoId],  });
  return rowCount === 1    ? {        statusCode: 200,        message: "Todo Complete success.",      }    : {        statusCode: 400,        message: "Todo Complete failed.",      };};

$ serverless invoke -f allTodo

使用授权信息 default 授权中，如果需要使用临时密钥，请使用 --login 重新登陆billDuration:      36duration:          36errMsg:functionRequestId: fe6d302d-f6db-42ad-9c7b-8d0c61ead9b3invokeResult:      0log:  """    START RequestId: fe6d302d-f6db-42ad-9c7b-8d0c61ead9b3    Event RequestId: fe6d302d-f6db-42ad-9c7b-8d0c61ead9b3
    END RequestId: fe6d302d-f6db-42ad-9c7b-8d0c61ead9b3    Report RequestId: fe6d302d-f6db-42ad-9c7b-8d0c61ead9b3 Duration:36ms Memory:256MB MemUsage:11.3984MB  """memUsage:          11952128---------------------------------------------Serverless: 调用成功
{  message: 'Tencent SCF execute successful!',  data: []}

$  serverless invoke -f addTodo --data "{\"body\":\"{\\\"title\\\":\\\"Create multi-scf project demo\\\",\\\"note\\\":\\\"Todo App with postgreSQL\\\"}\"}"

使用授权信息 default 授权中，如果需要使用临时密钥，请使用 --login 重新登陆billDuration:      35duration:          35errMsg:functionRequestId: 93f50016-064f-468d-9e98-31645fc254fdinvokeResult:      0log:  """    START RequestId: 93f50016-064f-468d-9e98-31645fc254fd    Event RequestId: 93f50016-064f-468d-9e98-31645fc254fd
    END RequestId: 93f50016-064f-468d-9e98-31645fc254fd    Report RequestId: 93f50016-064f-468d-9e98-31645fc254fd Duration:35ms Memory:128MB MemUsage:11.293MB  """memUsage:          11841536---------------------------------------------Serverless: 调用成功
{  statusCode: 201,  message: 'Todo added success.'}

$ serverless deploy --stage prod

$ sls logs --tail -f allTodo --stage prod

使用授权信息 default 授权中，如果需要使用临时密钥，请使用 --login 重新登陆
serverless ⚡componentsAction: "logs" - Stage: "prod" - App: "sls-demo-msn-todo-3e5a2134" - Name: "sls-demo-msn"
START RequestId:6f31857109130f092c547337c073ea91
Response RequestId:dbb3a8ed63a32be8e6b7a2dd8a32bbe2 RetMsg:{"message":"Tencent SCF execute successful!","data":[{"id":1,"title":"Create multi-scf project demo","note":"Todo App with postgreSQL","is_complete":false}]}END RequestId:dbb3a8ed63a32be8e6b7a2dd8a32bbe2Report RequestId:dbb3a8ed63a32be8e6b7a2dd8a32bbe2 Duration:4ms Memory:256MB MemUsage:12.113281MB
Response RequestId:485a87cfc6ad385b7e9c84343962391b RetMsg:{"message":"Tencent SCF execute successful!","data":[{"id":1,"title":"Create multi-scf project demo","note":"Todo App with postgreSQL","is_complete":false}]}END RequestId:485a87cfc6ad385b7e9c84343962391bReport RequestId:485a87cfc6ad385b7e9c84343962391b Duration:4ms Memory:256MB MemUsage:11.886719MB
START RequestId:0ede6d26dca55362a701c10ff51c9021

Serverless › 监听中 ...