Docker 打包部署web專案 [Dockerfile方式]
阿新 • • 發佈:2021-10-23
系統環境
IDE: IDEA 2020.2
Linux: WSL2 Ubuntu 20.04
Docker: 20.10.8
參考資料
1. 配置 SpringBoot 專案
1.1 建立 SpringBoot 專案
使用Spring Initializr
建立Spring Boot專案作為演示。
示例程式碼: pom.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.9.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.bpf</groupId> <artifactId>spring-boot-web</artifactId> <version>0.0.1</version> <name>spring-boot-web</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
示例程式碼: HelloController.java
package com.bpf.controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class HelloController { @GetMapping("/hello") public String hello() { return "Hello, Spring Web!"; } }
1.2 maven 打包
在與pom.xml
檔案同路徑下進行打包。打包後生成的jar包會儲存在target
目錄下。
mvn clean package -DskipTests
-DskipTests
表示跳過測試程式。
1.3 docker 打包
- 建立 docker資料夾
mkdir docker
cd docker
- 將jar包複製過來
cp ../target/*.jar .
- 建立 Dockerfile
touch spring_dockerfile
# spring_dockerfile 內容 FROM openjdk:8u312-slim-buster COPY *.jar /app.jar EXPOSE 8080 ENTRYPOINT java -jar /app.jar
- 建立映象
docker build -f spring_dockerfile -t spring-web .
- 執行容器
docker run -d --name springweb -p 8081:8080 spring-web
2. 配置 JavaWeb 專案
2.1 建立 JavaWeb 專案
注意點
Docker打包部署JavaWeb專案時,需要在pom.xml
中通過webXml標籤指定web.xml
的位置;同時需要通過resources標籤告知maven打包時要將xml配置檔案包括進去。
示例程式碼: pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.bpf</groupId>
<artifactId>javaweb</artifactId>
<version>0.0.1</version>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.0.0.RELEASE</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>*.xml</include>
</includes>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.2</version>
<configuration>
<webXml>web/WEB-INF/web.xml</webXml>
</configuration>
</plugin>
</plugins>
</build>
</project>
示例程式碼: web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
示例程式碼: spring.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.bpf">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
</beans>
示例程式碼: springmvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="com.bpf.controller"></context:component-scan>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<mvc:default-servlet-handler></mvc:default-servlet-handler>
<mvc:annotation-driven></mvc:annotation-driven>
</beans>
示例程式碼: HelloController.java
package com.bpf.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class HelloController {
@ResponseBody
@RequestMapping("/hello")
public String hello() {
System.out.println("訪問了 /hello");
return "Hello, JavaWeb.";
}
}
2.2 maven 打包
在與pom.xml
檔案同路徑下進行打包。打包後生成的war包會儲存在target
目錄下。
mvn clean package -DskipTests
2.3 docker 打包
- 建立 docker資料夾
mkdir docker
cd docker
- 將war包複製過來
cp ../target/*.war .
- 建立 Dockerfile
touch javaweb_dockerfile
# javaweb_dockerfile 內容
FROM tomcat:8.5-jdk8
ADD *.war /usr/local/tomcat/webapps/javaweb.war
EXPOSE 8080
ENTRYPOINT catalina.sh run
- 建立映象
docker build -f javaweb_dockerfile -t java-web .
- 執行容器
docker run -d --name javaweb -p 8082:8080 java-web