IntelliJ Ktor 和 Docker 有没有更好的方法？

Question

所以我在 IntelliJ 中启动了一个 ktor 项目，它在那里运行良好。但是，我现在尝试让 docker 使用从 build/libs 目录创建的 jar，但出现此错误：

WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: io/ktor/application/Application
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
    at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
    at java.lang.Class.getMethod0(Class.java:3018)
    at java.lang.Class.getMethod(Class.java:1784)
    at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: io.ktor.application.Application
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 7 more

这是我的 ktor.Dockerfile 的样子：

FROM openjdk:8-jre-alpine

ENV APPLICATION_USER ktor
RUN adduser -D -g '' $APPLICATION_USER

RUN mkdir /app
RUN chown -R $APPLICATION_USER /app

USER $APPLICATION_USER

COPY ./build/libs/website-0.0.1.jar /app/website-0.0.1.jar
WORKDIR /app

CMD ["java", "-server", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-XX:InitialRAMFraction=2", "-XX:MinRAMFraction=2", "-XX:MaxRAMFraction=2", "-XX:+UseG1GC", "-XX:MaxGCPauseMillis=100", "-XX:+UseStringDeduplication", "-cp", "website-0.0.1.jar", "com.diracian.ApplicationKt"]

我首先做的是启动一个 ktor 项目，在我开始工作之后，我开始处理我的 Dockerfile。

Answer 1

实际上，最后把它打碎了。

我的文件现在看起来像这样并且有效：

FROM gradle:jdk10 as builder

COPY --chown=gradle:gradle . /home/gradle/src
WORKDIR /home/gradle/src
RUN gradle build

FROM openjdk:10-jre-slim
EXPOSE 8080    
COPY --from=builder /home/gradle/src/build/distributions/website-0.0.1.tar /app/
WORKDIR /app
RUN tar -xvf website-0.0.1.tar
WORKDIR /app/website-0.0.1
CMD bin/website

IntelliJ Ktor 和 Docker 有没有更好的方法？

IntelliJ Ktor and Docker is there a better way?

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