我今天刚刚下载了Windows 10 64位的Docker工具箱。我正在看教程。当我试图使用Dockerfile构建一个映像时，我收到以下错误。
步骤:
启动Docker快速入门终端。
Testdocker创建后。
准备Dockerfile文档在“建立你自己的形象”网页链接
运行以下命令
Docker build -t Docker -whale。
错误:$ docker build -t docker-whale。
unable to prepare context: unable to evaluate symlinks in Dockerfile path: GetFileAttributesEx C:\Users\Villanueva\Test\testdocker\Dockerfile:系统找不到指定的文件。
顺便说一句:我尝试了提到的几个选项@ https://github.com/docker/docker/issues/14339
docker info
输出:
Containers: 4
Running: 0
Paused: 0
Stopped: 4
Images: 2
Server Version: 1.10.1
Storage Driver: aufs
Root Dir: /mnt/sda1/var/lib/docker/aufs
Backing Filesystem: extfs
Dirs: 20
Dirperm1 Supported: true
Execution Driver: native-0.2
Logging Driver: json-file
Plugins:
Volume: local
Network: bridge null host
Kernel Version: 4.1.17-boot2docker
Operating System: Boot2Docker 1.10.1 (TCL 6.4.1); master : b03e158 - Thu Feb 11 22:34:01 UTC 2016
OSType: linux
Architecture: x86_64
CPUs: 1
Total Memory: 996.2 MiB
Name: default
ID: C7DS:CIAJ:FTSN:PCGD:ZW25:MQNG:H3HK:KRJL:G6FC:VPRW:SEWW:KP7B
Debug mode (server): true
File Descriptors: 32
Goroutines: 44
System Time: 2016-02-19T17:37:37.706076803Z
EventsListeners: 0
Init SHA1:
Init Path: /usr/local/bin/docker
Docker Root Dir: /mnt/sda1/var/lib/docker
Labels:
provider=virtualbox
在WSL中，路径转换似乎存在问题。Dockerfile在Ubuntu中的位置(我运行Docker的位置和Dockerfile所在的位置)是“/home/sxw455/App1”，但这两个命令都不起作用:
$ pwd
/home/sxw455/App1
$ ll
total 4
drwxrwxrwx 0 sxw455 sxw455 4096 Dec 11 19:28 ./
drwxr-xr-x 0 sxw455 sxw455 4096 Dec 11 19:25 ../
-rwxrwxrwx 1 sxw455 sxw455 531 Dec 11 19:26 Dockerfile*
-rwxrwxrwx 1 sxw455 sxw455 666 Dec 11 19:28 app.py*
-rwxrwxrwx 1 sxw455 sxw455 12 Dec 11 19:27 requirements.txt*
$ docker build -t friendlyhello .
unable to prepare context: unable to evaluate symlinks in Dockerfile path: GetFileAttributesEx C:\Windows\System32\Dockerfile: The system cannot find the file specified.
$ docker build -t friendlyhello "/home/sxw455/App1"
unable to prepare context: path "/home/sxw455/App1" not found
但在Windows中，实际路径是:
C:\Users\sxw455\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgsc\LocalState\rootfs\home\sxw455\App1
所以我必须这样做(即使我从Bash运行它):
$ docker build -t friendlyhello
"C:\Users\sxw455\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgsc\LocalState\rootfs\home\sxw455\App1"
Sending build context to Docker daemon 5.12kB
Step 1/7 : FROM python:2.7-slim
---> 0dc3d8d47241
Step 2/7 : WORKDIR /app
---> Using cache
---> f739aa02ce04
Step 3/7 : COPY . /app
---> Using cache
---> 88686c524ae9
Step 4/7 : RUN pip install --trusted-host pypi.python.org -r requirements.txt
---> Using cache
---> b95f02b14f78
Step 5/7 : EXPOSE 80
---> Using cache
---> 0924dbc3f695
Step 6/7 : ENV NAME World
---> Using cache
---> 85c145785b87
Step 7/7 : CMD ["python", "app.py"]
---> Using cache
---> c2e43b7f0d4a
Successfully built c2e43b7f0d4a
Successfully tagged friendlyhello:latest
SECURITY WARNING: You are building a Docker image from Windows against a non-Windows Docker host. All files and directories added to build context will have '-rwxr-xr-x' permissions. It is recommended to double check and reset permissions for sensitive files and directories.
在最初的安装过程中，我在环境变量方面遇到了类似的问题，并遵循了一些建议，建议安装Windows DockerCE并破解环境变量，而不是安装Ubuntu DockerCE，因为(我希望我没记错)WSL没有完全实现systemctl。一旦Windows Docker CE安装完成并设置好环境变量，Docker就可以在WSL/Ubuntu下正常工作了。
