Raspberries come in the installation and use of Docker

Docker is an open source application container engine that allows developers to package their applications and dependencies to a lightweight, portable container and then posted to any popular Linux machine, can be virtualized. The container is full use of the sandbox mechanism will not have any interface, vessel performance with very low overhead between each other. This is useful for Raspberry Pi, this tutorial will introduce this tool and how to install Docker Docker on Raspbian.

Docker application scenarios

Automation package and publish Web applications.
Automated testing and continuous integration, release.
Deployment and tuning the database or other back-office applications in a service-oriented environment.
Recompile or extend an existing OpenShift or Cloud Foundry PaaS platform to build their own environment.

Docker's advantage

Docker allows developers to package their applications as well as a portable container to the dependencies, and then posted to any popular Linux machine, you can virtualize. Convenient Docker already is the biggest advantage of, used to take days or even weeks with the task in handling Docker containers, only take seconds to complete. Docker can simplify the deployment of multiple application instances work. Such as Web applications, back-end applications, database applications, large data applications such as Hadoop cluster, message queues, etc., can be packaged into a single image deployment.

Here are two methods for installing Docker, the simplest is to download directly from get.docker.com installation script and start the installation. Only execute the following line command. After testing, raspberry pie 3B, 3A +, 3B + can support Docker, raspberry pie Zero Although you can install successfully, but can not start Docker service .

Installation method (installation script)

Script installation is the most recommended way, just type the following command, wait for the automatic installation can be good.

 
         sudo 
         curl -sSL https: 
         //get 
         .docker.com | sh

If this step is successful installation, you can jump directly below the graphical installer where to continue reading.

The method of mounting two (apt installed)

由于 Raspbian 基于 Debian，我们还可以使用 apt 来安装 Docker，首先需要更新一下软件包的索引。

 
         sudo 
         apt-get update

安装 HTTPS 所依赖的包

 
         sudo 
         apt-get  
         install 
         apt-transport-https \ 
        
         ca-certificates \ 
        
         software-properties-common

添加 Docker 的 GPG key

 
         curl -fsSL https: 
         //yum 
         .dockerproject.org 
         /gpg 
         |  
         sudo 
         apt-key add -

验证 key id:

 
         apt-key fingerprint 58118E89F3A912897C070ADBF76221572C52609D

设置稳定的 repository:

 
         sudo 
         add-apt-repository \ 
        
         "deb https: 
         //apt 
         .dockerproject.org 
         /repo/ 
         \ 
        
         raspbian-$(lsb_release -cs) \ 
        
         main"

注意：如果 add-apt-repository 命令遇到问题，可以尝试将下面这行添加到树莓派软件源 sources.list，操作如下：

 
         sudo 
         nano  
         /etc/apt/sources 
         .list

添加一行：

deb https://apt.dockerproject.org/repo/ raspbian-RELEASE main

根据自己系统版本调整上面的 RELEASE。通过下面的命令可以查看发行版。

 
         lsb_release -cs

安装 Docker

 
         sudo 
         apt-get update 
        
         sudo 
         apt-get -y  
         install 
         docker-engine

测试 Docker

运行 hello-world 镜像来做一个测试。

 
         sudo 
         docker run hello-world

如果 Docker 安装成功，你会看到一条消息：“Hello from Docker!”。

常用配置和工具命令

 
         #查看 Docker 版本 
        
         docker - 
         v 
        
         sudo 
         docker pull 仓库/镜像:版本（留空的话默认为 latest） 
        
         sudo 
         docker run 加参数，用来创建容器 
        
         #查看运行容器 
        
         sudo 
         docker  
         ps 
        
         #查看所有下载的镜像 
        
         sudo 
         docker images 
        
         #进入容器终端 
        
         sudo 
         docker  
         exec 
         -i -t ha  
         /bin/bash 
        
         #实时查看10行的 ha 日志 
        
         sudo 
         docker logs -f -t -- 
         tail 
         10 ha 
        
         #重启 systemctl 守护进程 
        
         sudo 
         systemctl daemon-reload 
        
         #设置 Docker 开机启动 
        
         sudo 
         systemctl  
         enable 
         docker 
        
         #开启 Docker 服务 
        
         sudo 
         systemctl start docker 
        
         #下载 Docker 图形化界面 portainer 
        
         sudo 
         docker pull portainer 
         /portainer 
        
         #创建 portainer 容器 
        
         sudo 
         docker volume create portainer_data 
        
         #运行 portainer 
        
         sudo 
         docker run -d -p 9000:9000 --name portainer --restart always - 
         v 
         /var/run/docker 
         .sock: 
         /var/run/docker 
         .sock - 
         v 
         portainer_data: 
         /data 
         portainer 
         /portainer