微服务的脚手架Jhipster使用(一)

随着微服务的普及以及docker容器的广泛应用，有传统的soa服务衍生出微服务的概念，微服务强调的是服务的独立性，屏蔽底层物理平台的差异，此时你会发现微服务跟容器技术完美契合。在此基础上衍生出的云原生以及DevOps的概念，废话不多说介绍一个非常牛叉的springCloud脚手架- -jhipster。

　　安装

安装Java 8 from the Oracle website.
安装Node.js from the Node.js website (请安装 64-bit version)
安装npm包: npm install -g npm
如果你想使用jhipster应用市场, 请安装 Yeoman: npm install -g yo
最后安装JHipster: npm install -g generator-jhipster

生成项目

选择一个空的文件夹打开cmd：jhipster

根据一步步step提示选择构建自己的服务项目

windows下：
以下demo选择微服务应用。实际中根据自己需求生产项目。
1: Which *type* of application would you like to create? (Use arrow keys)
   Monolithic application (recommended for simple projects)  //简单项目
   Microservice application // 微服务应用
   Microservice gateway // 微服务网关
   JHipster UAA server (for microservice OAuth2 authentication) // 微服务认证
2 :What is the base name of your application? (huhuawei)
    输入服务名称
3: As you are running in a microservice architecture, on which port would like         
    your server to run? It should be unique to avoid port conflicts. (8081)
    设置服务的端口号
4：What is your default Java package name? (com.mycompany.myapp)
    设置包名
5：Which service discovery server do you want to use? (Use arrow keys)
     JHipster Registry (uses Eureka)
     Consul
     No service discovery
    选择注册中心。一般选择Registry比较多
6：Which *type* of authentication would you like to use? (Use arrow keys)
     JWT authentication (stateless, with a token)  // jwt
     OAuth 2.0 / OIDC Authentication (stateful, works with Keycloak and     
     Okta)//Oauth2 OIDC 认证服务
     Authentication with JHipster UAA server (the server must be generated  
     separately) // Oauth2+jwt Uaa认证服务
     选择授权中心
7： Which *type* of database would you like to use?
      SQL (H2, MySQL, MariaDB, PostgreSQL, Oracle, MSSQL)
      MongoDB
      Couchbase
      No database
      Cassandra
      选择数据库支持Nosql跟常见RDMB数据库
8：? Which *production* database would you like to use? (Use arrow keys)
      MySQL
      MariaDB
      PostgreSQL
      Oracle 
      Microsoft SQL Server
      选择数据库,这边会出现两次第一次是production 第二次是devlopment
9：Do you want to use the Spring cache abstraction?
     根据需求选择缓存
10：Do you want to use Hibernate 2nd level cache? (Y/n)
     是否支持二级缓存
11： Would you like to use Maven or Gradle for building the backend? (Use 
      arrow keys)
      Maven
      Gradle
12：Which other technologies would you like to use?
       安装一些其他的组件。如ES,KAFKA之类的
13：Would you like to enable internationalization support? (Y/n)
       支持国际化？
14： Please choose the native language of the application (Use arrow keys)
        English
        Estonian
        Farsi
        French
        Galician
        ........
        选择本地支持的语言包含中文
15：Please choose additional languages to install
       可以额外安装其他语言
16：Besides JUnit and Jest, which testing frameworks would you like to use? 
         Gatling
         Cucumber    
       选择测试框架，针对微服务http接口测试，生成测试报告 
17：Would you like to install other generators from the JHipster Marketplace?
       从jhipster市场中选择组件安装

如果你觉得安装这些环境太麻烦，你又熟悉docker的基本命令，那建议使用docker去生成项目；

选择linux服务器,安装docker；
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum list docker-ce --showduplicates | sort -r
sudo yum install -y docker-ce
sudo systemctl start docker
sudo systemctl enable docker
拉取jhipster官方镜像

docker pull jhipster/jhipster:master
启动jhipster镜像,选择一个空文件/jhipster夹挂载到容器中

docker container run --name jhipster

-v  /jhipster:/home/jhipster/app

-v  ~/.m2:/home/jhipster/.m2

-p 8080:8080

-p 9000:9000

-p 3001:3001

-d  -t jhipster/jhipster
进入容器中

docker container exec -it --user root jhipster bash

然后就可以生成项目了。与windows上操作无差别