怎么實現docker環(huán)境搭建
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工具準備：
vagrant、virtualbox、centos7、xshell：鏈接：https://pan.baidu.com/s/1iilSiJgOQ8Dk0Ol2JcZNzw 密碼：kybq
官網下載：
Vagrant：https://www.vagrantup.com/
VirtualBox：https://www.virtualbox.org/
安裝contos7（需先安裝virtualbox）
1、創(chuàng)建一個存放contos7的文件夾、并進入該目錄（目錄不要用中文）
2、在此目錄輸入cmd，運行：vagrant init centos/7，在此目錄會生成一個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.
# 安裝虛擬機
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# `vagrant box outdated`.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.
# 共用網絡
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、將virtualbox.box文件添加到vagrant管理的鏡像中
如文件virtualbox.box在E:\centOs\目錄下：
vagrant box add centos/7 E:\centOs\virtualbox.box
4、查看本地是否安裝成功：vagrant box list
5、啟動contos7：vagrant up
vagrant基本操作命令
進入創(chuàng)建的contos7：vagrant ssh
查看centos7狀態(tài)：vagrant status
停止contos7：vagrant halt
刪除contos7：vagrant destroy
vagrantfile中也可以寫腳本命令，使得centos7更加豐富，但是要注意，修改了Vagrantfile，要想使正常運行的centos7生效，必須使用vagrant reload
通過xshell鏈接contos7
1、查看contos7信息：vagrant ssh-config
關注IP：127.0.0.1、prot：2222、用戶名/密碼：vagrant/vagrant
文件:Identityfile指向的文件private-key
2、root設置密碼：
sudo -i
vi /etc/ssh/sshd_config
修改PasswordAuthentication yes并保存
passwd root
systemctl restart sshd
使用賬號root，密碼root進行登錄
box的打包分發(fā)
1、退出虛擬機：vagrant halt
2、打包：vagrant package --output first-docker-centos7.box
3、得到first-docker-centos7.box
4、將first-docker-centos7.box添加到其他的vagrant環(huán)境中：vagrant box add first-docker-centos7 first-docker-centos7.box
5、得到Vagrantfile：vagrant init first-docker-centos7
6、根據Vagrantfile啟動虛擬機：vagrant up [此時可以得到和之前一模一樣的環(huán)境，但是網絡要重新配置]
環(huán)境準備完成體驗docker安裝
1、如果非root用戶登陸需在命令前面加上sudo，或者將當前用戶添加到docker用戶組；
sudo groupadd docker #添加docker用戶組 sudo gpasswd -a $USER docker #將登陸用戶加入到docker用戶組中 newgrp docker #更新用戶組
2、卸載之前安裝的docker：
sudo yum remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-engine
3、安裝必要的依賴
sudo yum install -y yum-utils \ device-mapper-persistent-data \ lvm2
4、添加倉庫：
官網倉庫：
sudo yum-config-manager \ --add-repo \ https://download.docker.com/linux/centos/docker-ce.repo
阿里云倉庫：
sudo yum-config-manager \ --add-repo \ http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
設置阿里云加速器需注銷阿里云賬號：https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors
5、安裝docker:
sudo yum install -y docker-ce docker-ce-cli containerd.io
6、啟動docker:
sudo systemctl start docker
7、測試docker
sudo docker run hello-world
docker體驗
01 創(chuàng)建tomcat容器 下載鏡像：docker pull tomcat 運行tomcat把8080端口映射到contos7的9090端口：docker run -d --name my-tomcat -p 9090:8080 tomcat 訪問方式：contos7IP:9090（如果404檢查webapps文件是否空文件,webapps.dist有內容） rm -rf webapps mv webapps.dist webapps 03 進入到容器里面 docker exec -it containerid /bin/bash docker pull 拉取鏡像到本地 docker run 根據某個鏡像創(chuàng)建容器 -d 讓容器在后臺運行，其實就是一個進程 --name 給容器指定一個名字 -p 將容器的端口映射到宿主機的端口 docker exec -it 進入到某個容器中并交互式運行
上述就是小編為大家分享的怎么實現docker環(huán)境搭建了，如果剛好有類似的疑惑，不妨參照上述分析進行理解。如果想知道更多相關知識，歡迎關注創(chuàng)新互聯行業(yè)資訊頻道。
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