docker - 构建gcloud项目时出现问题:复制失败:未指定任何源文件

Question

我有一个带有DockerFile的Java项目，如下所示:

FROM openjdk:8-jdk-alpine
RUN addgroup -S spring && adduser -S spring -G spring
USER spring:spring
ARG JAR_FILE=target/*.jar
COPY ${JAR_FILE} shape-shop-backend.jar
ENTRYPOINT ["java","-jar","/shape-shop-backend.jar"]

如果我像这样运行docker:

C:\dev\shape-shop>docker build -t testtest:1.0

它完美地构建了图像。
我假设“gcloud构建提交”的工作方式相同。我在Google云上有一个名为 whataboutanewproject 的项目，因此在同一目录中运行以下命令:

C:\dev\shape-shop>gcloud builds submit --tag gcr.io/whataboutanewproject/shapeshop

但是我得到这个错误:

Digest: sha256:94792824df2df33402f201713f932b58cb9de94a0cd524164a0f2283343547b3
Status: Downloaded newer image for openjdk:8-jdk-alpine
 ---> a3562aa0b991
Step 2/6 : RUN addgroup -S spring && adduser -S spring -G spring
 ---> Running in 36cf2156a797
Removing intermediate container 36cf2156a797
 ---> 7320b32f6fe1
Step 3/6 : USER spring:spring
 ---> Running in f439aa9ca30e
Removing intermediate container f439aa9ca30e
 ---> 67f952c7bc2a
Step 4/6 : ARG JAR_FILE=target/*.jar
 ---> Running in 0bcfbf5f3b79
Removing intermediate container 0bcfbf5f3b79
 ---> 7519fa3bdc2f
Step 5/6 : COPY ${JAR_FILE} shape-shop-backend.jar
COPY failed: no source files were specified
ERROR
ERROR: build step 0 "gcr.io/cloud-builders/docker" failed: step exited with non-zero status: 1
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

ERROR: (gcloud.builds.submit) build d3704337-88de-4dda-a120-ebd2a01ee8c9 completed with status "FAILURE"

C:\dev\shape-shop>

为什么不能正确处理DockerFile？
“gcloud构建提交”甚至可以构建图像吗？ website上的文档非常垃圾，以至于我完全不知道“gcloud build Submit”命令的作用。

Answer 1

您必须指定源位置。
然后gcloud builds submit ${PWD} ...将复制例如将${PWD}(通常使用.代替)添加到Cloud Build中的/workspace(默认)目录，以便可以继续进行构建(特别是COPY ${JAR_FILE} ...)。
例

FROM busybox
ARG JAR_FILE=target/test.txt
COPY ${JAR_FILE} test.txt
ENTRYPOINT ["more","test.txt"]

NOTE Better not to copy wildcards to a specific file

和:

.
├── Dockerfile
└── target
    └── test.txt

和:

docker build --tag=test --file=./Dockerfile .
docker run --interactive --tty test:latest
Hello Freddie!

然后，假设启用了Cloud的GCP项目({PROJECT}):

gcloud builds submit . --tag=gcr.io/${PROJECT}/test --project=${PROJECT}
docker run --interactive --tty gcr.io/${PROJECT}/test:latest
...
Hello Freddie!

NOTE gcloud builds submit requires . or ${PWD}