2018-03-30 16:41:01 +08:00
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# Docker 之 Hello World
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## 前提
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确保你的环境上已经成功安装 Docker。
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## Hello World 实例
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1. 使用 `docker version` 命令确保你的环境已成功安装 Docker。
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```
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# docker version
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Client:
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Version: 1.13.1
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API version: 1.26
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Package version: <unknown>
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Go version: go1.8.3
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Git commit: 774336d/1.13.1
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Built: Wed Mar 7 17:06:16 2018
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OS/Arch: linux/amd64
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Server:
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Version: 1.13.1
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API version: 1.26 (minimum version 1.12)
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Package version: <unknown>
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Go version: go1.8.3
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Git commit: 774336d/1.13.1
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Built: Wed Mar 7 17:06:16 2018
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OS/Arch: linux/amd64
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Experimental: false
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```
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2. 使用 `docker run` 命令运行 Hello World 镜像。
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```
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docker run hello-world
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Unable to find image 'hello-world:latest' locally
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latest: Pulling from library/hello-world
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ca4f61b1923c: Pull complete
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Digest: sha256:ca0eeb6fb05351dfc8759c20733c91def84cb8007aa89a5bf606bc8b315b9fc7
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Status: Downloaded newer image for hello-world:latest
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Hello from Docker!
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This message shows that your installation appears to be working correctly.
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...
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```
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3. 使用 `docker image ls`命令查看镜像
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```
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docker image ls
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REPOSITORY TAG IMAGE ID CREATED SIZE
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docker.io/maven latest 76c9ab5df55b 7 days ago 737 MB
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docker.io/python 2.7-slim 5541369755c4 13 days ago 139 MB
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docker.io/hello-world latest f2a91732366c 4 months ago 1.85 kB
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docker.io/java 8-jre e44d62cf8862 14 months ago 311 MB
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docker.io/training/webapp latest 6fae60ef3446 2 years ago 349 MB
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```
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4. 使用 `docker container ls --all` 命令查看容器
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如果查看正在运行的容器，不需要添加 `--all` 参数。
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```
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docker container ls --all
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CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
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a661d957c6fa hello-world "/hello" 2 minutes ago Exited (0) 2 minutes ago mystifying_swartz
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3098f24a1064 docker.io/hello-world "/hello" 6 minutes ago Exited (0) 6 minutes ago sad_yonath
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4c98c4f18a39 hello-world "/hello" 8 minutes ago Exited (0) 8 minutes ago admiring_banach
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2019-02-25 16:48:48 +08:00
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```
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