10課部署自動化8月30號論壇

1、部署_nginx_pm2_docker課程目標Nginx靜態(tài) location 動態(tài)數(shù)據(jù)請求proxy 負載均衡了解cluster原理掌握pm2部署NodeJS服務參考文檔使用pm2+nginx部署koa2(https) 課程內(nèi)容如何構(gòu)建一個高可用的node環(huán)境主要解決問題故障恢復多核利用 796914多進程共享端口/ app.jsconst Koa = require(koa);/ 創(chuàng)建一個Koa對象表示web app本身: const app = new Koa();/ 對于任何請求，app將調(diào)用該異步函數(shù)處理請求：app.use(async (ctx, next) = / 隨機產(chǎn)生錯誤M

2、ath.random() 0.9 ? aaa() : 2await next();ctx.response.type = text/html; ctx.response.body = Hello, koa2!;);if (!module.parent) 開課吧web全棧架構(gòu)師開課吧web全棧架構(gòu)師app.listen(3000);console.log(app started at port 3000.); else module.exports = app/ test.jsvar http = require(http); setInterval(async () = try await h

3、ttp.get(); catch (error) , 1000)/ cluster.jsvar cluster = require(cluster);var os = require(os); / 獲取CPU 的數(shù)量var numCPUs = os.cpus().length; var process = require(process)console.log(numCPUs:, numCPUs) var workers = ;if (cluster.isMaster) / 主進程分支cluster.on(death, function (worker) / 當一個工作進程結(jié)束時，重啟工作進程

4、 delete workersworker.pid; worker = cluster.fork();workersworker.pid = worker;);/ 初始開啟與CPU 數(shù)量相同的工作進程for (var i = 0; i console.log(worker + cluster.worker.id + ,PID: + process.pid) next()app.listen(3000);/ 當主進程被終止時，關閉所有工作進程process.on(SIGTERM, function () for (var pid in workers) process.kill(pid);pro

5、cess.exit(0););require(./test)文件上傳服務器scp (最原始)scp docker-compose.yml root3:/root/source/ #文件scp -r mini-01 root3:/root/source/ #文件夾git (實際工作中) deploy插件 (debug)PM2的應用內(nèi)建負載均衡（使用Node cluster 集群模塊、子進程，可以參考樸靈的深入淺出node.js一書第九章） 線程守護，keep alive0秒停機重載，維護升級的時候不需要停機.現(xiàn)在 Linux (stable) & Ma

6、cOSx (stable) & Windows (stable).多平臺支持停止不穩(wěn)定的進程（避免無限循環(huán)）控制臺檢測 https:/id.keymetrics.io/api/oauth/login#/register提供 HTTP API配置npm install -g pm2pm2 start app.js -watch -i 2/ watch 監(jiān)聽文件變化/ -i 啟動多少個實例pm2 stop all pm2 listpm2 start app.js -i max # 根據(jù)機器CPU核數(shù)，開啟對應數(shù)目的進程配置process.ymlapps:- script : app.js inst

7、ances: 2 watch : true env :NODE_ENV: productionKeymetrics在線監(jiān)控開課吧web全棧架構(gòu)師 pm2 link 8hxvp4bfrftvwxn uis7ndy58fvuf7l TARO-SAMPLEpm2設置為開機啟動 pm2 startupNginx 反向 + 前端打包Dist安裝yum install nginxapt updateapt install nginx添加靜態(tài)路由# /etc/nginx/sites-enable/taroserver listen 80;server_name ; location / root /root

8、/source/taro-node/dist; index index.html index.htm;# 驗證Nginx配置nginx -t# 重新啟動Nginx service nginx restartnginx -s reload# /etc/nginx/sites-enable # taroserver listen 80;server_name ;開課吧web全棧架構(gòu)師# 查看配置文件位置nginx -t# nginx: the configuration file /etc/nginx/nginx.conf syntax is ok# nginx: configuration fi

9、le /etc/nginx/nginx.conf successful#重啟service nginx restartnginx -reloadDocker概念操作系統(tǒng)層面的虛擬化技術的進程 于宿主和其它的 的進程 - 容器GO語言開發(fā)特點高效的利用系統(tǒng)快速的啟動時間一致的運行環(huán)境持續(xù)交付和部署更輕松的遷移對比傳統(tǒng)虛擬機總結(jié)開課吧web全棧架構(gòu)師特性容器虛擬機啟動秒級分鐘級硬盤使用一般為 MB一般為 GB性能接近原生弱于系統(tǒng)支持量單機支持上千個容器一般幾十個location / root /root/source/taro-node/dist; index index.html index.h

10、tm;location .(gif|jpg|png)$ root /root/source/taro-node/server/static;location /api proxy_pass;proxy_redirect off;proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr;proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;三個 概念鏡像容器倉庫Docker基本使用構(gòu)建一個Nginx服務器1. 拉取 鏡像# 拉取 鏡像docker pu

11、ll nginx# 查看docker images nginx# 啟動鏡像mkdir wwwecho hello docker! www/index.html# 啟動# www目錄里面放一個index.htmldocker run -p 80:80 -v $PWD/www:/usr/share/nginx/html -d nginx# 查看進程docker psdocker ps -a / 查看全部# 偽終端 ff6容器的uuid# -t 選項讓Docker分配一個偽終端（pseudo-tty）并綁定到容器的標準輸入上，# -i 則讓容器的標準輸入保持打開docker exec -it ff6

12、 /bin/bash# 停止docker stop ff6# 刪除鏡像docker rm ff6Dockerle定制鏡像#DockerfileFROM nginx:latestRUN echo Hello, Kaikeba! /usr/share/nginx/html/index.html開課吧web全棧架構(gòu)師# 定制鏡像docker build -t mynginx .# 運行# -d 守護態(tài)運行docker run -p 80:80 -d mynginx定制一個程序NodeJS鏡像npm init -y npm i koa -s/ package.jsonname: myappp,vers

13、ion: 1.0.0,main: app.js, scripts: test: echo Error: no test specified & exit 1,keywords: ,author: ,license: ISC, description: myappp, dependencies: koa: 2.7.0/ app.jsconst Koa = require(koa) const app = new Koa() app.use(ctx = Math.random() 0.8 ? abc() : ctx.body = Hello Docker)app.listen(3000, () =

14、 console.log(app started at)開課吧web全棧架構(gòu)師#Dockerfile#制定node鏡像的版本FROM node:10-alpine#移動當前目錄下面的文件到app目錄下ADD . /app/#進入到app目錄下面，類似cd WORKDIR /app#安裝依賴RUN npm install#對外 的端口EXPOSE 3000#程序啟動CMD node, app.js# 定制鏡像docker build -t mynode .# 運行docker run -p 3000:3000 -d mynodePm2 - 利用多核# .dockerignore node_mod

15、ules/ process.yml apps:- script : app.js instances: 2 watch : true env :NODE_ENV: production# DockerfileFROM keymetrics/pm2:latest-alpine WORKDIR /usr/src/appADD . /usr/src/appRUN npm config set registry npm iEXPOSE 3000#pm2在docker中使用命令為pm2-dockerCMD pm2-runtime, start, process.yml& 開課吧web全棧架構(gòu)師# 定制鏡

16、像docker build -t mypm2 .# 運行docker run -p 3000:3000 -d mypm2Docker-Compose#docker-compose.yml app-pm2:container_name: app-pm2 #構(gòu)建容器build: . # volumes:# - .:/usr/src/app ports:- 3000:3000/ 強制重新構(gòu)建并啟# -force-recreate 強制重建容器# -build 強制編譯docker-compose up -d -force-recreate -build#docker-compose.yml vers

17、ion: 3.1 services:nginx:image: nginx:kaikeba ports:- 80:80# 運行docker-compose up# 運行docker-compose up -d部署Mongo + MongoExpress開課吧web全棧架構(gòu)師#docker-compose.yml version: 3.1 services:mongo:image: mongo restart: always ports:- 27017:27017mongo-express:image: mongo-express restart: always ports:- 8081:8081

18、代碼中添加Mongoose調(diào)用/ mongoose.jsconst mongoose = require(mongoose);/ 1.連接mongoose.connect(mongodb:/mongo:27017/test, useNewUrlParser: true );const conn = mongoose.connection;conn.on(error, () = console.error(連接數(shù)據(jù)庫失敗);/ app.jsconst mongoose = require(mongoose); mongoose.connect(mongodb:/mongo:27017/test,

19、 useNewUrlParser: true); const Cat = mongoose.m (Cat, name: String );Cat.deleteMany()const kitty = new Cat( name: Zildjian ); kitty.save().then() = console.log(meow);app.use(async ctx = ctx.body = await Cat.find()WebHook實現(xiàn)CI持續(xù)集成啟動NodeJS開課吧web全棧架構(gòu)師var http = require(http)var createHandler = require(

20、-webhook-handler)var handler = createHandler( path: /webhooks, secret: myHashSecret )/ 上面的 secret 保持和設置的一致function run_cmd(cmd, args, callback) var spawn = require(child_process).spawn; var child = spawn(cmd, args);var resp = ;child.stdout.on(data, function (buffer) resp += buffer.toString(); ); child.stdout.on(end, function () callback(resp) );http.createServer(function (req, res) handler(req, res, function (err) res.statusCode = 404 res.end(no such location).listen(3000)handler.