docker - 将 Docker 中的 * 文件复制到目录会出错

Question

我有以下 Dockerfile

FROM openjdk:8-jdk-alpine
RUN mkdir -p /webpieces
COPY * /webpieces
WORKDIR "/webpieces"
ENTRYPOINT ["./bin/webpiecesexample"]

当我这样构建时，我收到以下错误

Deans-MacBook-Pro:webpiecesexample dean$ docker build -t gcr.io/braided-topic/webpieces2 .
Sending build context to Docker daemon  75.56MB
Step 1/5 : FROM openjdk:8-jdk-alpine
 ---> a3562aa0b991
Step 2/5 : RUN mkdir -p /webpieces
 ---> Running in bc615c0cd540
Removing intermediate container bc615c0cd540
 ---> 69a2f4530c44
Step 3/5 : COPY * /webpieces
When using COPY with more than one source file, the destination must be a directory and end with a /

当我修剪 DockerFile 并仅使用前两行进行构建，然后使用基本 shell 运行以查看目录时，我会在那里看到 webpieces 目录

docker run -it --entrypoint sh gcr.io/braided-topic-266113/webpieces2

我可以 cd 到 webpieces 和一切。为什么复制命令在这里不起作用？

这里是docker版本:

Deans-MacBook-Pro:distributions dean$ docker version
Client: Docker Engine - Community
 Version:           19.03.5
 API version:       1.40
 Go version:        go1.12.12
 Git commit:        633a0ea
 Built:             Wed Nov 13 07:22:34 2019
 OS/Arch:           darwin/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          19.03.5
  API version:      1.40 (minimum version 1.12)
  Go version:       go1.12.12
  Git commit:       633a0ea
  Built:            Wed Nov 13 07:29:19 2019
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          v1.2.10
  GitCommit:        b34a5c8af56e510852c35414db4c1f4fa6172339
 runc:
  Version:          1.0.0-rc8+dev
  GitCommit:        3e425f80a8c931f88e6d94a8c831b9d5aa481657
 docker-init:
  Version:          0.18.0
  GitCommit:        fec3683

Answer 1

When using COPY with more than one source file, the destination must be a directory and end with a /.

将 COPY 行更改为

COPY * /webpieces/

---

...it seems to copy the contents of each directory instead of the directories themselves. I would prefer not to name each directory I am moving as we prefer auto-add when we make changes.

使用 . 而不是 * 它将保留所有嵌套。

COPY . /webpieces/