从 Docker 运行 Spring Boot 应用程序不起作用

Question

I have a rather strange problem. I am trying to run a Spring Boot app via docker. So here are my steps.

1) I am creating a Dockerfile.

FROM centos

RUN yum install -y java

VOLUME /tmp
ADD /spring-boot-web-0.0.1-SNAPSHOT.jar myapp.jar
RUN sh -c 'touch /myapp.jar'
ENTRYPOINT [“java","-Djava.security.egd=file:/dev/./urandom","- 
jar","/myapp.jar"]

In this file I am installing java. I am also using the jar file of the app called spring-boot-web-0.0.1-SNAPSHOT.jar

2) The next step is to build an image. So I am typing

tmp theodosiostziomakas$ docker build -t spring-boot-docker .

So the image was built correctly.

3) Now I am running that image to generate a container. So

docker run -d -p 8080:8080 spring-boot-docker

You can see that a container is generated. But when I type

$ docker ps

the container_id is not visible and when I type localhost:8080 in the browser the app is not running at all. Why is this happening? Any ideas? How to fix it?

Answer 1

If the posted Dockerfile the file you are using then there is a wrong quote sign just before java:

FROM centos

RUN yum install -y java

VOLUME /tmp

ADD /spring-boot-web-0.0.1-SNAPSHOT.jar myapp.jar

RUN sh -c 'touch /myapp.jar'

ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/myapp.jar"]