java - 添加失败 : stat/var/lib/docker/tmp/docker-builderXYZ/myapp. jar: 没有这样的文件或目录

Question

我把Dockerfile进入项目根目录。

意思是有一个 ./target目录和其中，maven 生成一个 spring-boot-web-0.0.1-SNAPSHOT.jar文件。

我现在想将其添加到 docker 镜像中:

FROM centos

RUN yum install -y java    # `-y` defaults questions to 'yes'

VOLUME /tmp                # where Spring Boot will store temporary files

WORKDIR /                  # self-explanatory

ADD /target/spring-boot-web-0.0.1-SNAPSHOT.jar myapp.jar # add fat jar as "myapp.jar"

RUN sh -c 'touch ./myapp.jar' # updates dates on the application (important for caching)

EXPOSE 8080                # provide a hook into the webapp

# run the application; the `urandom` gets tomcat to start faster
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/myapp.jar"]

此 ADD失败:

ADD failed: stat /var/lib/docker/tmp/docker-builder119635304/myapp.jar: no such file or directory

Answer 1

解决方案似乎是将注释移到它们自己的行中，因为如果它们与它们在同一行中，它们会破坏命令。

此 Dockerfile工作得很好:

# a linux runtime environment
FROM centos

# install java; `-y` defaults questions to 'yes'
RUN yum install -y java

# where Spring Boot will store temporary files
VOLUME /tmp

# self-explanatory
WORKDIR /

# add fat jar as "myapp.jar"
ADD /target/spring-boot-web-0.0.1-SNAPSHOT.jar myapp.jar

# updates dates on the application (important for caching)
RUN sh -c 'touch ./myapp.jar'

# provide a hook into the webapp
EXPOSE 8080

# run the application; the `urandom` gets tomcat to start faster
ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/myapp.jar"]