idea docker docker-compose发布springboot站点到tomcat

允许docker被远程访问

见：https://www.cnblogs.com/wintersoft/p/10921396.html

教程：https://spring.io/guides/gs/spring-boot-docker/#initial

在idea新建项目

spring boot启动类加上

@RestController

和

@RequestMapping("/")
    public String home() {
    return "Hello Docker!";
}

在启动类同级，新建Servletinitializer类

import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;

public class Servletinitializer extends SpringBootServletInitializer {

@Override
protected SpringApplicationBuilder    
    configure(SpringApplicationBuilder builder) {
        return builder.sources(DockerDemo2Application.class);
    }
}

pom.xml加入

<packaging>war</packaging>

和

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
    <scope>provided</scope>
</dependency>

<dependency>
    <groupId>org.apache.tomcat.embed</groupId>
    <artifactId>tomcat-embed-jasper</artifactId>
    <scope>provided</scope>
</dependency>

点击idea右上的Edit Confgurations -> + -> Docker -> Dockerfile，配置如图

生成war包，终端输入：mvn clean package

项目根目录新建/tomcat/conf

复制tomcat的server.xml到/tomcat/conf

若没有tomcat配置文件可以下载一个，如：

wget -P /opt/downloads http://mirrors.tuna.tsinghua.edu.cn/apache/tomcat/tomcat-9/v9.0.20/bin/apache-tomcat-9.0.20.tar.gz
tar zxvf /opt/downloads/apache-tomcat-9.0.20.tar.gz -C /opt

server.xml的host节点内添加<Context path="" docBase="app" reloadable="true" debug="0" />

项目根目录创建Dockerfile

FROM tomcat
MAINTAINER sundong
ARG WAR=docker-demo2-1.0.0.war
COPY /tomcat/conf/server.xml /publish/tomcat/conf/server.xml
COPY target/$WAR /publish/app/$WAR
RUN mkdir $CATALINA_HOME/webapps/app 
&& cp /publish/app/$WAR $CATALINA_HOME/webapps/app 
&& cp /publish/tomcat/conf/server.xml $CATALINA_HOME/conf 
&& unzip $CATALINA_HOME/webapps/app/$WAR -d $CATALINA_HOME/webapps/app/ 
&& rm $CATALINA_HOME/webapps/app/$WAR 
&& cd $CATALINA_HOME/webapps/app && echo "succ" > a.txt
EXPOSE 8080

项目根目录创建docker-compose.yml

version: '3.4'
services:
  dockerweb:
    image: dockerdemox2:latest
    container_name: dockerdemox2
    restart: always
    build:
      context: .
      dockerfile: Dockerfile
    volumes:
      - ./tomcat:/publish/tomcat
      - ./target:/publish/app
    ports:
      - "28080:8080"

解决tomcat启动慢
https://www.cnblogs.com/wintersoft/p/10942845.html

把项目中的target文件夹的war包、tomcat文件夹、Dockerfile和docker-compose.yml 复制到centos

进入centos网站目录

docker-compose up --build

或

docker-compose build
docker-compose up

浏览器输入192.168.1.102:38080，测试站点是否启动成功

若没问题，退出后，以守护进程启动站点

docker-compose up -d