错误:服务‘api-网关’生成失败:添加失败: stat /var/lib/docker/tmp/docker-builder931060141/api-gateway:没有这样的文件或目录

Question

我在建立一个以码头为基地的项目上有困难。我的总体目录结构如下：

api-gateway
│  ├─handler
│  └─resource
   --Dockerfile

我的Dockerfile包含：

FROM alpine:3.2
ADD api-gateway /api-gateway
ADD resource/pri_key.pem resource/pub_key.pem /resource/
#ADD resource/ca-certificates.crt /etc/ssl/certs/
VOLUME /resource/
ENTRYPOINT [ "/api-gateway" ]

即使我使用ADD在图像中包含一个文件，我仍然会得到一个错误。api-gateway是一个目录，其中包含Dockerfile。

D:\FileWithDocument\ExtraCodeProject\shop-micro-master>docker-compose up
Building api-gateway
Step 1/5 : FROM alpine:3.2
 ---> 98f5f2d17bd1
Step 2/5 : ADD api-gateway /api-gateway
ERROR: Service 'api-gateway' failed to build: ADD failed: stat /var/lib/docker/tmp/docker-builder931060141/api-gateway: no such file or directory

我在Windows中使用Docker桌面。码头引擎版本是：

Client: Docker Engine - Community
 Version:           18.09.2
 API version:       1.39
 Go version:        go1.10.8
 Git commit:        6247962
 Built:             Sun Feb 10 04:12:31 2019
 OS/Arch:           windows/amd64
 Experimental:      false

Server: Docker Engine - Community
 Engine:
  Version:          18.09.2
  API version:      1.39 (minimum version 1.12)
  Go version:       go1.10.6
  Git commit:       6247962
  Built:            Sun Feb 10 04:13:06 2019
  OS/Arch:          linux/amd64
  Experimental:     true

当我下载github项目并运行docker构建时，它仍然输出此错误。

错误:服务‘api-网关’生成失败:添加失败: stat /var/lib/docker/tmp/docker-builder931060141/api-gateway:没有这样的文件或目录

Answer 1

运行docker build时，您提供的目录将成为上下文目录；您只能引用该目录树中的文件路径，并且COPY或ADD语句中的任何文件路径总是相对于该目录。这意味着，如果您从包含docker build的名为api-gateway的目录运行Dockerfile，则.是同一个目录。您的Dockerfile看起来可能更像：

FROM alpine:3.2

# This will create the directory in the image if it
# doesn't already exist.
WORKDIR /api-gateway

# Copy the entire current directory into the image.
# (Prefer COPY to ADD, unless you specifically want
# automatic archive extraction or HTTP fetches.)
COPY . .

# Copy in some additional files.
# (Remember that anyone who has the image can extract any
# file from it: this leaks a private key.)
COPY resource/pri_key.pem resource/pub_key.pem /resource/
COPY resource/ca-certificates.crt /etc/ssl/certs/

# Set the default command to launch.
# (Prefer CMD to ENTRYPOINT: it is easier to get a debugging
# container with a shell, and there is a useful pattern that
# uses an ENTRYPOINT wrapper to do first-time setup before
# launching the CMD.)
CMD ["/api-gateway/handler"]

如果您看到一个“docker-builder12345678/.：no此类文件或目录”错误，则应该始终将较长的数字之后的路径组件解释为相对于传递给docker build的目录。