# 使用 CircleCI 部署 Node.jS App 到 GCP App Engine (二)
# GCP
我們將使用功能十分強大的 Google App Engine(GAE)進行部署,GAE 在處理大流量(load)時,例如訂票系統或是物流系統時非常適合。不但不用自己管理 load balance 的問題。Google 還會幫你自動開關 instances,使用者付費原則,用多少就付多少。
因為 GAE 是 Google Cloud Platform(GCP)下的一個服務所以若還沒有 GCP 先註冊註起來!新註冊的人可以享有一年 300 美金的試用,注意註冊時需要輸入一張信用卡才能開始使用,在試用階段 Google 並不會為向你收費,除非你主動跟他說要訂閱方案才會開啟收費流程。
註冊完後我們就能夠開始使用 GCP 了,進到 Google App Engine(GAE) 畫面,接下來點擊 建立應用程式。
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# 部屬
# add app.yaml
```yaml
runtime: nodejs # Name of the App Engine language runtime used by this application
env: flex # Select the flexible environment
manual_scaling: # Enable manual scaling for a service
instances: 1 # 1 instance assigned to the service
resources: # Control the computing resources
cpu: 1
memory_gb: 0.5
disk_size_gb: 10
skip_files: # Specifies which files in the application directory are not to be uploaded to App Engine
# We just need build/server.js to deploy
- node_modules/
- .gitignore
- .git/
- .circleci/
- src/
- test/
- .eslintrc.js
- .huskyrc.js
- .eslintignore
- .prettierrc
- babel.config.js
- lint-staged.config.js
- nodemon.json
```
>gcloud app deploy
>
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# 沒有指定 在 package.json nodejs 版本
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# 沒有在 package.json指定 start 指令
>...
Step #0: Application detection failed: Error: node.js checker: Neither "start" in the "scripts" section of "package.json" nor the "server.js" file were found.
>
# add package.json
```json=
....
"scripts": {
"lint": "eslint . --fix",
"dev": "nodemon",
"test": "jest",
"build": "rm -rf build && babel src -d build --copy-files",
"start": "node src\\server.js"
}
```
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>rm -rf node_modules package-lock.json && npm install && npm start
>yarn install --ignore-engines
>
# bug 太多 我們升級為 babel
# package.json
```jsonld=
{
"name": "demo-server",
"version": "1.0.0",
"main": "index.js",
"license": "MIT",
"dependencies": {
"express": "^4.17.1",
"format": "^0.2.2"
},
"devDependencies": {
"@babel/cli": "^7.10.4",
"@babel/core": "^7.10.4",
"@babel/node": "^7.10.4",
"@babel/preset-env": "^7.10.4",
"babel-eslint": "^10.1.0",
"babel-jest": "^26.1.0",
"eslint": "^7.4.0",
"eslint-config-airbnb-base": "^14.2.0",
"eslint-config-prettier": "^6.11.0",
"eslint-plugin-import": "^2.22.0",
"eslint-plugin-jest": "^23.17.1",
"eslint-plugin-prettier": "^3.1.4",
"jest": "^26.1.0",
"nodemon": "^2.0.4",
"prettier": "^2.0.5",
"supertest": "^4.0.2"
},
"scripts": {
"lint": "eslint . --fix",
"dev": "nodemon",
"test": "jest ",
"build": "rm -rf build && babel src -d build --copy-files",
"start": "babel-node src/server.js"
}
}
```
# src/server.js
```javascript=
import express from 'express';
const app = express();
const { PORT = 3000 } = process.env;
const IS_TEST = !!module.parent; // If there's another file imports server.js, then module.parent will become true
app.get('/', (req, res) => {
res.status(200).send('Hello!CI/CD!2');
});
if (!IS_TEST) {
app.listen(PORT, () => {
console.log('Server is running on PORT:', PORT);
});
}
export default app;
```
# test/server.test.js
```javascript=
import supertest from 'supertest';
import app from '../src/server';
const PORT = 3001;
let listener;
let request;
beforeAll(() => {
listener = app.listen(PORT);
request = supertest(listener);
});
afterAll(async () => {
await listener.close();
});
test('Server Health Check', async () => {
const res = await request.get('/');
expect(res.status).toEqual(200);
expect(res.text).toBe('Hello!CI/CD!2');
});
test('Server Health Check2', async () => {
const res = await request.get('/');
expect(res.status).toEqual(200);
expect(res.text).toBe('Hello!CI/CD!2');
});
```
# 根目錄新增babel.config.js
```
module.exports = {
presets: [
[
'@babel/preset-env',
{
targets: {
node: 'current',
},
},
],
],
};
```
# run
測試 ok
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# 部屬
# add package.json
都沒說這個 找有夠久
```jsonld=
.....
"start": "node build/server.js"
```
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等到往生
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# 整合CircleCI deploy
# add config.yml
```
version: 2.1
jobs:
build:
docker:
- image: circleci/node:latest
steps:
- checkout
- run:
name: Check Node.js version
command: node -v
- run:
name: Install yarn
command: 'curl -o- -L https://yarnpkg.com/install.sh | bash'
- restore_cache:
name: Restore dependencies from cache
key: dependency-cache-{{ checksum "yarn.lock" }}
- run:
name: Install dependencies if needed
command: |
if [ ! -d node_modules ]; then
yarn install --frozen-lockfile
fi
- save_cache:
name: Cache dependencies
key: dependency-cache-{{ checksum "yarn.lock" }}
paths:
- ./node_modules
- run:
name: Lint
command: yarn eslint . --quiet
- run:
name: Test
command: yarn jest --ci --maxWorkers=2
- run:
name: Build
command: npm run build
- persist_to_workspace:
root: .
paths:
- build
- package.json
- yarn.lock
- app.yaml
deploy:
docker:
- image: google/cloud-sdk
steps:
- attach_workspace:
at: .
- run:
name: ls
command: ls -al
- run:
name: Setup gcloud env
command: |
echo $GCP_KEY > gcloud-service-key.json
gcloud auth activate-service-account --key-file=gcloud-service-key.json
gcloud --quiet config set project ${GCP_PROJECT_ID}
gcloud --quiet config set compute/zone ${GCP_REGION}
- run:
name: Deploy to App Engine
command: gcloud app deploy
workflows:
version: 2
build-deploy:
jobs:
- build
- deploy:
requires:
- build
filters:
branches:
only: master
```
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# 填入 環境變數
進入申請金鑰 [ Cloud IAM ](https://cloud.google.com/iam/?hl=zh-tw)
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記得 GCP_KEY 是下載下來的 json 檔案
>GCP_KEY xxxxm" }
GCP_PROJECT_ID xxxx1716
GCP_REGION xxxxt1-b
>
# 啟用App Engine Admin API
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# commit 部屬一次
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可以看到有再跑了
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等10分左右
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總算好囉 CD