How to deploy springboot project with Docker

Create project

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>2.1.9.release</version>
    <relativepath/> <!-- lookup parent from repository -->
  </parent>
  <groupid>com.topcheer</groupid>
  <artifactid>docker</artifactid>
  <version>0.0.1-snapshot</version>
  <name>docker</name>
  <description>demo project for spring boot</description>

  <properties>
    <java.version>1.8</java.version>
    <docker.image.prefix>topcheer</docker.image.prefix>
  </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>
       <plugin>
      <groupid>com.spotify</groupid>
      <artifactid>docker-maven-plugin</artifactid>
      <version>1.0.0</version>
      <configuration>
        <imagename>${docker.image.prefix}/${project.artifactid}</imagename>
        <dockerdirectory>src/main/docker</dockerdirectory>
        <resources>
          <resource>
            <targetpath>/</targetpath>
            <directory>${project.build.directory}</directory>
            <include>${project.build.finalname}.jar</include>
          </resource>
        </resources>
      </configuration>
    </plugin>
    </plugins>
  </build>

</project>

Startup class

@springbootapplication
@controller
public class dockerapplication {
  public static void main(string[] args) {
    springapplication.run(dockerapplication.class, args);
  }
  @requestmapping("/user/find")
  @responsebody
  public object finduser(){
    map<string, string > map = new hashmap<>();
    map.put("name", "xdclass.net");
    map.put("age","28");
    return map;
  }
}

Because harbor is not installed, The image cannot be pushed to the private image repository, so execute it manually first.

mvn install, then put the dockerfile and jar package together

[root@topcheer docker]# ll
总用量 16452
-rw-r--r-- 1 root root   168 10月 28 14:24 dockerfile
-rw-r--r-- 1 root root 16842487 10月 28 14:17 docker.jar
[root@topcheer docker]# cat dockerfile
from java:8
volume /tmp
add docker.jar app.jar
run bash -c 'touch /app.jar'
expose 8080
entrypoint ["java","-djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
[root@topcheer docker]#

Compile into an image and start

[root@topcheer docker]# docker build -f dockerfile -t boot .
sending build context to docker daemon 16.85 mb
step 1/6 : from java:8
 ---> d23bdf5b1b1b
step 2/6 : volume /tmp
 ---> running in 35037b5a7791
 ---> e96b96457c78
removing intermediate container 35037b5a7791
step 3/6 : add docker.jar app.jar
 ---> 06bcfdcff437
removing intermediate container 2e2e5e559ae4
step 4/6 : run bash -c 'touch /app.jar'
 ---> running in 16441febc271

 ---> 1779caa23f77
removing intermediate container 16441febc271
step 5/6 : expose 8080
 ---> running in 14dd752ce247
 ---> 505044f5cdf8
removing intermediate container 14dd752ce247
step 6/6 : entrypoint java -djava.security.egd=file:/dev/./urandom -jar /app.jar
 ---> running in 832e4ca95dd2
 ---> 1cb7bd139478
removing intermediate container 832e4ca95dd2
successfully built 1cb7bd139478
[root@topcheer docker]# docker images
repository                       tag         image id      created       size
boot                          latest       1cb7bd139478    about a minute ago  677 mb
registry.cn-hangzhou.aliyuncs.com/dalianpai/topcheer  zipkin       17c2bb09f482    6 days ago      154 mb
docker.io/mysql                    latest       c8ee894bd2bd    11 days ago     456 mb
elasticsearch                     latest       874179f19603    4 weeks ago     771 mb
docker.io/nacos/nacos-server              latest       a4229ac5cc19    4 weeks ago     710 mb
springbootdemo4docker                 latest       cd13bc7f56a0    5 weeks ago     678 mb
docker.io/tomcat                    latest       ee48881b3e82    6 weeks ago     506 mb
docker.io/rabbitmq                   latest       a00bc560660a    6 weeks ago     147 mb
docker.io/centos                    latest       67fa590cfc1c    2 months ago     202 mb
docker.io/redis                    latest       f7302e4ab3a8    2 months ago     98.2 mb
docker.io/rabbitmq                   3.7.16-management  3f92e6354d11    3 months ago     177 mb
docker.io/elasticsearch                6.8.0        d0b291d7093b    5 months ago     895 mb
docker.io/hello-world                 latest       fce289e99eb9    10 months ago    1.84 kb
docker.io/java                     8          d23bdf5b1b1b    2 years ago     643 mb
[root@topcheer docker]# docker run -d -p 8080:8080 boot
882ff5209aa2f40972a914b901750a50320faea65100b33e57b9c8a41533ca0b

Test

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