怎么实现docker环境搭建
这期内容当中小编将会给大家带来有关怎么实现docker环境搭建，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
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工具准备：
vagrant、virtualbox、centos7、xshell：链接：https://pan.baidu.com/s/1iilSiJgOQ8Dk0Ol2JcZNzw 密码：kybq
官网下载：
Vagrant：https://www.vagrantup.com/
VirtualBox：https://www.virtualbox.org/
安装contos7（需先安装virtualbox）
1、创建一个存放contos7的文件夹、并进入该目录（目录不要用中文）
2、在此目录输入cmd，运行：vagrant init centos/7，在此目录会生成一个Vagrantfile。
修改Vagrantfile：
# -*- mode: ruby -*-
# vi: set ft=ruby :
# All Vagrant configuration is done below. The "2" in Vagrant.configure
# configures the configuration version (we support older styles for
# backwards compatibility). Please don't change it unless you know what
# you're doing.
Vagrant.configure("2") do |config|
# The most common configuration options are documented and commented below.
# For a complete reference, please see the online documentation at
# https://docs.vagrantup.com.
# Every Vagrant development environment requires a box. You can search for
# boxes at https://vagrantcloud.com/search.
# 安装虚拟机
config.vm.box = "centos/7"
# Disable automatic box update checking. If you disable this, then
# boxes will only be checked for updates when the user runs
# `vagrant box outdated`. This is not recommended.
# config.vm.box_check_update = false
# Create a forwarded port mapping which allows access to a specific port
# within the machine from a port on the host machine. In the example below,
# accessing "localhost:8080" will access port 80 on the guest machine.
# NOTE: This will enable public access to the opened port
# config.vm.network "forwarded_port", guest: 80, host: 8080
# Create a forwarded port mapping which allows access to a specific port
# within the machine from a port on the host machine and only allow access
# via 127.0.0.1 to disable public access
# config.vm.network "forwarded_port", guest: 80, host: 8080, host_ip: "127.0.0.1"
# Create a private network, which allows host-only access to the machine
# using a specific IP.
# config.vm.network "private_network", ip: "192.168.33.10"
# Create a public network, which generally matched to bridged network.
# Bridged networks make the machine appear as another physical device on
# your network.
# 共用网络
config.vm.network "public_network"
# Share an additional folder to the guest VM. The first argument is
# the path on the host to the actual folder. The second argument is
# the path on the guest to mount the folder. And the optional third
# argument is a set of non-required options.
# config.vm.synced_folder "../data", "/vagrant_data"
# Provider-specific configuration so you can fine-tune various
# backing providers for Vagrant. These expose provider-specific options.
# Example for VirtualBox:
#
# config.vm.provider "virtualbox" do |vb|
# # Display the VirtualBox GUI when booting the machine
# vb.gui = true
#
# # Customize the amount of memory on the VM:
# vb.memory = "1024"
# end
config.vm.provider "virtualbox" do |vb|
vb.memory = "3000"
vb.name= "xj-centos7"
vb.cpus= 2
end
#
# View the documentation for the provider you are using for more
# information on available options.
# Enable provisioning with a shell script. Additional provisioners such as
# Puppet, Chef, Ansible, Salt, and Docker are also available. Please see the
# documentation for more information about their specific syntax and use.
# config.vm.provision "shell", inline: <<-SHELL
# apt-get update
# apt-get install -y apache2
# SHELL
end3、将virtualbox.box文件添加到vagrant管理的镜像中
如文件virtualbox.box在E:\centOs\目录下：
vagrant box add centos/7 E:\centOs\virtualbox.box
4、查看本地是否安装成功：vagrant box list
5、启动contos7：vagrant up
vagrant基本操作命令
进入创建的contos7：vagrant ssh
查看centos7状态：vagrant status
停止contos7：vagrant halt
删除contos7：vagrant destroy
vagrantfile中也可以写脚本命令，使得centos7更加丰富，但是要注意，修改了Vagrantfile，要想使正常运行的centos7生效，必须使用vagrant reload
通过xshell链接contos7
1、查看contos7信息：vagrant ssh-config
关注IP：127.0.0.1、prot：2222、用户名/密码：vagrant/vagrant
文件:Identityfile指向的文件private-key
2、root设置密码：
sudo -i
vi /etc/ssh/sshd_config
修改PasswordAuthentication yes并保存
passwd root
systemctl restart sshd
使用账号root，密码root进行登录
box的打包分发
1、退出虚拟机：vagrant halt
2、打包：vagrant package --output first-docker-centos7.box
3、得到first-docker-centos7.box
4、将first-docker-centos7.box添加到其他的vagrant环境中：vagrant box add first-docker-centos7 first-docker-centos7.box
5、得到Vagrantfile：vagrant init first-docker-centos7
6、根据Vagrantfile启动虚拟机：vagrant up [此时可以得到和之前一模一样的环境，但是网络要重新配置]
环境准备完成体验docker安装
1、如果非root用户登陆需在命令前面加上sudo，或者将当前用户添加到docker用户组；
sudo groupadd docker #添加docker用户组 sudo gpasswd -a $USER docker #将登陆用户加入到docker用户组中 newgrp docker #更新用户组
2、卸载之前安装的docker：
sudo yum remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-engine
3、安装必要的依赖
sudo yum install -y yum-utils \ device-mapper-persistent-data \ lvm2
4、添加仓库：
官网仓库：
sudo yum-config-manager \ --add-repo \ https://download.docker.com/linux/centos/docker-ce.repo
阿里云仓库：
sudo yum-config-manager \ --add-repo \ http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
设置阿里云加速器需注销阿里云账号：https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors
5、安装docker:
sudo yum install -y docker-ce docker-ce-cli containerd.io
6、启动docker:
sudo systemctl start docker
7、测试docker
sudo docker run hello-world
docker体验
01 创建tomcat容器 下载镜像：docker pull tomcat 运行tomcat把8080端口映射到contos7的9090端口：docker run -d --name my-tomcat -p 9090:8080 tomcat 访问方式：contos7IP:9090（如果404检查webapps文件是否空文件,webapps.dist有内容） rm -rf webapps mv webapps.dist webapps 03 进入到容器里面 docker exec -it containerid /bin/bash docker pull 拉取镜像到本地 docker run 根据某个镜像创建容器 -d 让容器在后台运行，其实就是一个进程 --name 给容器指定一个名字 -p 将容器的端口映射到宿主机的端口 docker exec -it 进入到某个容器中并交互式运行
上述就是小编为大家分享的怎么实现docker环境搭建了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注创新互联行业资讯频道。
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