6 项目部署 nginx/pm2/docker

时间 2020-03-16

标签项目部署 nginx pm2 docker 栏目 Nginx 繁體版

原文原文链接

课程⽬目标

Nginxhtml
- 静态资源location
- 动态数据请求proxy
- 负载均衡
了了解cluster原理理
掌握pm2部署NodeJS服务

参考⽂文档

使⽤用pm2+nginx部koa2(https)https://www.zhaofinger.com/de...前端

课程内容

cluster模块

主要解决问题node
- 故障恢复
- 多核利利⽤用
- http://www.sohu.com/a/2477325...
- 多进程共享端⼝口

⽂件上传服务器器

scp (最原始)nginx

scp docker-compose.yml root@47.98.252.43:/root/source/ #⽂件
scp -r mini-01 root@47.98.252.43:/root/source/ #⽂件夹

git (实际⼯工做中)
deploy插件 (debug)

PM2的应⽤

内建负载均衡（使⽤用Node cluster 集群模块、⼦子进程，能够参考朴灵的《深⼊入浅出node.js》⼀一书第九章）
线程守护，keep alive
0秒停机重载，维护升级的时候不不须要停机.
如今 Linux (stable) & MacOSx (stable) & Windows (stable).多平台⽀支持
停⽌止不不稳定的进程（避免⽆无限循环）
控制台检测https://id.keymetrics.io/api/...
提供 HTTP API

配置

npm install -g pm2
pm2 start app.js --watch -i 2
// watch 监听⽂文件变化
// -i 启动多少个实例例
pm2 stop all
pm2 list
pm2 start app.js -i max # 根据机器器CPU核数，开启对应数⽬目的进程，那么每次都要执行这个命令不是很麻烦？

配置process.yml

apps:
    - script : app.js
    instances: 2
    watch : true
    env :
    NODE_ENV: production

启动配置git
```
pm2 start process.yml
```
Keymetrics在线监控 https://id.keymetrics.io/api/...github
```
pm2 link 8hxvp4bfrftvwxn uis7ndy58fvuf7l TARO-SAMPLE
```
pm2设置为开机启动web
```
pm2 startup
```

Nginx 反向代理理 + 前端打包Dist

安装

yum install nginx
-----
apt update
apt install nginx

添加静态路路由

# /etc/nginx/sites\-enable/taro  
server {  
    listen 80;  
    server\_name taro.josephxia.com;  
    location / {  
        root /root/source/taro\-node/dist;  
        index index.html index.htm;  
    }  
}

# 验证Nginx配置
nginx -t
# 从新启动Nginx
service restart nginx

nginx -s reload

\# /etc/nginx/sites\-enable  
\# taro  
server {  
    listen 80;  
    server_name taro.josephxia.com;  
    location / {  
        root /root/source/taro-node/dist;  
        index index.html index.htm;  
    }  
    location ~ \\.(gif|jpg|png)$ {  
        root /root/source/taro-node/server/static;  
    }  
    location /api {  
        proxy\_pass http://127.0.0.1:3000;  
        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;  
    }  
}

# 查看配置⽂文件位置
nginx -t
# nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
# nginx: configuration file /etc/nginx/nginx.conf test is successful
#重启
service nginx restart

Docker

概念

操做系统层⾯面的虚拟化技术
隔离的进程独⽴立于宿主和其它的隔离的进程 - 容器器
GO语⾔言开发

特色

⾼高效的利利⽤用系统资源
快速的启动时间
⼀一致的运⾏行行环境
持续交付和部署
更更轻松的迁移

对⽐比传统虚拟机总结

特性	容器	虚拟机
启动	秒级	分钟级
硬盘使⽤用	通常为 MB	通常为 GB
性能	接近原⽣生	弱于
系统⽀支持量量	单机⽀支持上千个容器器	⼀通常⼏几⼗十个

三个核⼼心概念

镜像
容器
仓库

Docker基本使⽤用

构建⼀一个Nginx服务器器

拉取官⽅方镜像mongodb

# 拉取官⽅方镜像
docker pull nginx
# 查看
docker images nginx
# 启动镜像
mkdir www
echo 'hello docker!!' >> www/index.html
# 启动
# www⽬目录⾥里里⾯面放⼀一个index.html
docker run -p 80:80 -v $PWD/www:/usr/share/nginx/html -d nginx
# 查看进程
docker ps
docker ps -a // 查看所有
# 伪终端 ff6容器器的uuid
# -t 选项让Docker分配⼀一个伪终端（pseudo-tty）并绑定到容器器的标准输⼊入上，
# -i 则让容器器的标准输⼊入保持打开
docker exec -it ff6 /bin/bash
# 停⽌止
docker stop ff6
# 删除镜像
docker rm ff6

Dockerfile定制镜像

#Dockerfile
FROM nginx:latest
RUN echo '<h1>Hello, Kaikeba!</h1>' > /usr/share/nginx/html/index.html

# 定制镜像
docker build -t mynginx .
# 运⾏行行
# -d 守护态运⾏行行
docker run -p 80:80 -d mynginx

定制⼀一个程序NodeJS镜像

npm init -y
npm i koa -s

// package.json  
{  
    "name": "myappp",  
    "version": "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.js  
const Koa \= require('koa')  
const app \= new Koa()  
app.use(ctx \=> {  
    Math.random() \> 0.8 ? abc() : ''  
  ctx.body \= 'Hello Docker'  
})  
app.listen(3000, () \=> {  
    console.log('app started at http://localhost:3000/')  
})

#Dockerfile
#制定node镜像的版本
FROM node:10-alpine
#移动当前⽬目录下⾯面的⽂文件到app⽬目录下
ADD . /app/
#进⼊入到app⽬目录下⾯面，相似cd
WORKDIR /app
#安装依赖
RUN npm install
#对外暴暴露露的端⼝口
EXPOSE 3000
#程序启动脚本
CMD ["node", "app.js"]

# 定制镜像
docker build -t mynode .
# 运⾏行行
docker run -p 3000:3000 -d mynode

Pm2 - 利⽤多核资源

# .dockerignore
node_modules

// process.yml  
{  
    "apps": [{  
    "name": "app-name",  
    "script": "app.js",  
    "instances": 2,  
    "env": {  
        "production": true  
  }  
}\]  
}

# Dockerfile
FROM keymetrics/pm2:latest-alpine
WORKDIR /usr/src/app
ADD . /usr/src/app
RUN npm config set registry https://registry.npm.taobao.org/ && \
npm i
EXPOSE 3000
#pm2在docker中使⽤用命令为pm2-docker
CMD ["pm2-runtime", "start", "process.yml"]

# 定制镜像
docker build -t mypm2 .
# 运⾏行行
docker run -p 3000:3000 -d mypm2

Docker-Compose

#docker-compose.yml
app-pm2:
container_name: app-pm2
#构建容器器
build: .
# volumes:
# - .:/usr/src/app
ports:
- "3000:3000"

// 强制从新构建并启
# --force-recreate 强制重建容器器
# --build 强制编译
docker-compose up -d --force-recreate --build

#docker-compose.yml
version: '3.1'
services:
    nginx:
        image: nginx:kaikeba
        ports:- 80:80

# 运⾏
docker-compose up
# 后台运行
docker-compose up -d

部署Mongo + MongoExpress

#docker-compose.yml
version: '3.1'
services:
    mongo:
        image: mongo
        restart: always
        ports:- 27017:27017
    mongo-express:
        image: mongo-express
        restart: always
        ports:- 8081:8081

代码中添加Mongoose调⽤用

// mongoose.js
const mongoose = require("mongoose");
// 1.链接
mongoose.connect("mongodb://mongo:27017/test", { useNewUrlParser: true });
const conn = mongoose.connection;
conn.on("error", () => console.error("链接数据库失败"));

// app.js
const mongoose = require('mongoose');
mongoose.connect('mongodb://mongo:27017/test', {useNewUrlParser: true});
const Cat = mongoose.model('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()
})

Github WebHook实现CI持续集成

启动NodeJS监听

var http \= require('http')  
var createHandler \= require('github-webhook-handler');  
var handler \= createHandler({path: '/webhooks', secret: 'myHashSecret'})  
  
// 上⾯面的 secret 保持和 GitHub 后台设置的⼀一致  
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.on('error', function (err) {  
    console.error('Error:', err.message)  
})  
  
handler.on('\*', function (event) {  
    console.log('Received \*', event.payload.action);  
// run\_cmd('sh', \['./deploy-dev.sh'\], function(text){  
  console.log(text)  
})  
  
handler.on('push', function (event) {  
    console.log('Received a push event for %s to %s',  
        event.payload.repository.name,  
        event.payload.ref);  
// 分⽀支判断  
  if (event.payload.ref \=== 'refs/heads/master') {  
        console.log('deploy master..')  
    }  
// run\_cmd('sh', \['./deploy-dev.sh'\], function(text){  
  console.log(text)  
})  
  
handler.on('issues', function (event) {  
    console.log('Received an issue event for % action=%s: #%d %s',  
        event.payload.repository.name,  
        event.payload.action,  
        event.payload.issue.number,  
        event.payload.issue.title)  
})