我在macOS Sierra上安装了Docker,如下所示.注意我没有安装VirtualBox.
brew cask uninstall virtualbox
brew cask install docker
我的macOS细节.
$ uname -a
Darwin m-C02QG7TRG8WN.local 16.5.0 Darwin Kernel Version 16.5.0: Fri Mar 3 16:52:33 PST 2017; root:xnu-3789.51.2~3/RELEASE_X86_64 x86_64
$ docker version
Client:
Version: 17.03.1-ce
API version: 1.27
Go version: go1.7.5
Git commit: c6d412e
Built: Tue Mar 28 00:40:02 2017
OS/Arch: darwin/amd64
Server:
Version: 17.03.1-ce
API version: 1.27 (minimum version 1.12)
Go version: go1.7.5
Git commit: c6d412e
Built: Fri Mar 24 00:00:50 2017
OS/Arch: linux/amd64
Experimental: true
一旦我从launchpad运行Docker,我就能够运行Docker容器.
$ docker run -it ubuntu
root@2351d4222a4e:/# uname -a
Linux 2351d4222a4e 4.9.13-moby #1 SMP Sat Mar 25 02:48:44 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
我的问题是Docker如何在macOS中运行Linux内核?我认为Docker至少需要运行boot2docker或其他类似的Linux内核,以便在它的帮助下创建Ubuntu的文件系统.但上述结果似乎表明情况并非如此.那么Linux内核从何而来?