树莓派2下如何安装docker

这篇文章主要介绍树莓派2下如何安装docker，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！

树莓派2下安装 docker 记录

以前一直不清楚所谓的 Docker容器 是什么, 偶尔看一些相关的信息, 也是看得云里雾里. 不过转机在昨天出现, 昨晚看了几篇非常不错的 docker 资料, 才明白, 原来就是一个轻量级的类似虚拟机的东东.

它可以从你的系统中隔离出一个空间, 在这个隔离空间中你可以安装/配置/运行各种软件, 而不会对你原有的系统造成影响.

而且你安装配置好的一切都可以导出一个单独的镜像文件, 以后你想回到自己之前配置好的环境作业, 直接导入这个镜像文件就行了(感觉跟 Common Lisp 运行时镜像的概念很相似). docker 具备类似 Git 的版本管理功能, 这样每次对环境的更改都会被记录, 你可以很方便地回退到任何一个改动点.

你生成的镜像文件也可以共享给其他人使用, 这对于多人开发的项目很有用, 可以把开发环境配置的工作一次搞定. 其实 docker 更大的用途是运行配置好的应用.

那么就试着安装一下吧, 按照说明, 直接在我的两个树莓派2(一个安装了Raspbian 系统, 一个安装了 Kano 系统)下运行命令:

pi@rpi ~ $ sudo apt-get install dockerReading package lists... DoneBuilding dependency treeReading state information... Donedocker is already the newest version.The following packages were automatically installed and are no longer required:  libmozjs10d libopencc1 libpresage-data libpresage1 libproxy0 libtinyxml2.6.2 libwebp2 presage python-support realpathUse 'apt-get autoremove' to remove them.0 upgraded, 0 newly installed, 0 to remove and 106 not upgraded.pi@rpi ~ $

很好, 提示我已经安装了最新的版本, 那就运行一下吧:

pi@rpi ~ $ sudo docker --helpsudo: docker: command not foundpi@rpi ~ $

奇怪了, 说是找不到命令, 那就看看安装到哪里去了:

pi@rpi ~ $ whereis dockerdocker:pi@rpi ~ $

好像有些不大对头, 貌似没有找到关于 docker 的可执行文件, 而我们用 whereis 命令查找 git 和 tmux 的输出如下:

pi@rpi ~ $ whereis gitgit: /usr/bin/git /usr/share/man/man1/git.1.gzpi@rpi ~ $ whereis tmuxtmux: /usr/bin/tmux /usr/local/bin/tmux /usr/share/man/man1/tmux.1.gzpi@rpi ~ $

那么用 find 搜索一下:

pi@rpi ~ $ sudo find / -name docker/opt/github/buildroot/package/docker/usr/share/doc/docker/usr/share/menu/dockerpi@rpi ~ $

违和感更强烈了, 上面这几个好像看起来都不大象是一个独立的软件包的样子, 那么我们用 apt-cache search 命令看看是否还有其他以 docker 为名的软件:

pi@rpi ~ $ sudo apt-cache search dockerdocker - System tray for KDE3/GNOME2 docklet applicationskarbon - vector graphics application for the Calligra Suitekdocker - lets you dock any application into the system traydocker.io - Linux container runtimegolang-docker-dev - Externally reusable Go packages included with Dockerpython-docker - Python wrapper to access docker.io's control socketpython3-docker - Python 3 wrapper to access docker.io's control socketruby-docker-api - Ruby gem to interact with docker.io remote APIvim-syntax-docker - Docker container engine - Vim highlighting syntax filespi@rpi ~ $

原来是这样, docker 跟 raspbian 系统下的一个系统托盘应用重名了, 我们要找的容器 docker 是 docker.io, 那么试着安装一下:

pi@rpi ~ $ sudo apt-get install docker.ioReading package lists... DoneBuilding dependency treeReading state information... DoneThe following packages were automatically installed and are no longer required:  libmozjs10d libopencc1 libpresage-data libpresage1 libproxy0 libtinyxml2.6.2 libwebp2 presage python-support realpathUse 'apt-get autoremove' to remove them.The following extra packages will be installed:  aufs-tools cgroupfs-mount libapparmor1Suggested packages:  btrfs-tools debootstrap lxc rinseThe following NEW packages will be installed:  aufs-tools cgroupfs-mount docker.io libapparmor10 upgraded, 4 newly installed, 0 to remove and 106 not upgraded.Need to get 3,235 kB of archives.After this operation, 15.6 MB of additional disk space will be used.Do you want to continue? [Y/n] yGet:1 http://mirrordirector.raspbian.org/raspbian/ jessie/main cgroupfs-mount all 1.1 [4,572 B]Get:2 http://mirrordirector.raspbian.org/raspbian/ jessie/main aufs-tools armhf 1:3.2+20130722-1.1 [91.0 kB]Get:3 http://mirrordirector.raspbian.org/raspbian/ jessie/main libapparmor1 armhf 2.9.0-3 [58.1 kB]Get:4 http://mirrordirector.raspbian.org/raspbian/ jessie/main docker.io armhf 1.3.3~dfsg1-2 [3,082 kB]Fetched 3,235 kB in 15s (209 kB/s)Selecting previously unselected package aufs-tools.(Reading database ... 188303 files and directories currently installed.)Preparing to unpack .../aufs-tools_1%3a3.2+20130722-1.1_armhf.deb ...Unpacking aufs-tools (1:3.2+20130722-1.1) ...Selecting previously unselected package cgroupfs-mount.Preparing to unpack .../cgroupfs-mount_1.1_all.deb ...Unpacking cgroupfs-mount (1.1) ...Selecting previously unselected package libapparmor1:armhf.Preparing to unpack .../libapparmor1_2.9.0-3_armhf.deb ...Unpacking libapparmor1:armhf (2.9.0-3) ...Selecting previously unselected package docker.io.Preparing to unpack .../docker.io_1.3.3~dfsg1-2_armhf.deb ...Unpacking docker.io (1.3.3~dfsg1-2) ...Processing triggers for man-db (2.7.0.2-5) ...Processing triggers for systemd (215-17+deb8u2) ...Setting up aufs-tools (1:3.2+20130722-1.1) ...Setting up cgroupfs-mount (1.1) ...Mounting cgroupfs hierarchy.Setting up libapparmor1:armhf (2.9.0-3) ...Setting up docker.io (1.3.3~dfsg1-2) ...Adding group `docker' (GID 117) ...Done.Starting Docker: docker.Processing triggers for libc-bin (2.19-18+deb8u1) ...Processing triggers for systemd (215-17+deb8u2) ...pi@rpi ~ $

果然如此, 顺利安装完毕, 试着运行一下:

pi@rpi ~ $ docker --versionDocker version 1.3.3, build d344625pi@rpi ~ $pi@rpi ~ $ sudo docker infoContainers: 0Images: 0Storage Driver: devicemapper Pool Name: docker-179:2-73614-pool Pool Blocksize: 65.54 kB Data file: /var/lib/docker/devicemapper/devicemapper/data Metadata file: /var/lib/docker/devicemapper/devicemapper/metadata Data Space Used: 305.7 MB Data Space Total: 107.4 GB Metadata Space Used: 729.1 kB Metadata Space Total: 2.147 GB Library Version: 1.02.90 (2014-09-01)Execution Driver: native-0.2Kernel Version: 4.1.13-v7+Operating System: Raspbian GNU/Linux 8 (jessie)WARNING: No swap limit supportpi@rpi ~ $

很好, 现在我们已经成功地在 raspbian 系统上安装了一个 docker, 后续就可以在这个 docker 进行操作了.

启动我们的 docker 守护进程:

pi@rpi ~/notebooks $ sudo docker -d2015/12/29 16:35:03 docker daemon: 1.3.3 d344625; execdriver: native; graphdriver: [ed7f66b0] +job serveapi(unix:///var/run/docker.sock)WARNING: The Docker runtime currently only officially supports amd64 (not arm). THIS BUILD IS NOT OFFICIAL AND WILL NOT BE SUPPORTED BY DOCKER UPSTREAM.[info] Listening for HTTP on unix (/var/run/docker.sock)[ed7f66b0] +job init_networkdriver()Interface docker0 has more than 1 IPv4 address. Defaulting to using 172.17.42.1[ed7f66b0] -job init_networkdriver() = OK (0)2015/12/29 16:35:04 WARNING: Your kernel does not support cgroup swap limit.[info] Loading containers: [info] : done.[ed7f66b0] +job acceptconnections()[ed7f66b0] -job acceptconnections() = OK (0)

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