在 Window 10 上安裝完 Docker 後，照著官方文件提到透過 powershell 下 command line 確認安裝是否正常，第一項輸入 docker version 正常順利執行，但下一步的 docker run hello-world 就沒那麼順利跳出無法正常執行，錯誤訊息如下所示
- PS D:\> docker run hello-world
- Unable to find image 'hello-world:latest' locally
- C:\Program Files\Docker\Docker\Resources\bin\docker.exe: Error response from daemon: pull access denied for hello-world, repository does not exist or may require 'docker login'.
- See 'C:\Program Files\Docker\Docker\Resources\bin\docker.exe run --help'.
- PS D:\>
解決方式很簡單，在第一次使用 docker run 之前需先做登入的動作(印象中之前不用登入)，可以透過兩種方式在 Docker 登入
第一種 : 在 Docker icon 按下右鍵 > 選擇 sign in
在3-5行可以看到輸入帳號密碼後顯示登入成功，接下來再使用 docker run hello-world 步驟即可看到 Hello from Docker! ，可以開始享受 Docker 的強大之處了!!!
- PS C:\Users\marcustung> docker login
- Login with your Docker ID to push and pull images from Docker Hub. If you dont have a Docker ID, head over to https://hub.docker.com to create one.
- Username: marcustung
- Password:
- Login Succeeded
- PS C:\Users\marcustung> docker run hello-world
- Hello from Docker!
- This message shows that your installation appears to be working correctly.
- To generate this message, Docker took the following steps:
- 1. The Docker client contacted the Docker daemon.
- 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
- (amd64)
- 3. The Docker daemon created a new container from that image which runs the
- executable that produces the output you are currently reading.
- 4. The Docker daemon streamed that output to the Docker client, which sent it
- to your terminal.
- To try something more ambitious, you can run an Ubuntu container with:
- $ docker run -it ubuntu bash
- Share images, automate workflows, and more with a free Docker ID:
- https://hub.docker.com/
- For more examples and ideas, visit:
- https://docs.docker.com/get-started/
參考
Docker hello-world: authentication error
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