Docker Base image creates its own concrete implementation _docker

Docker Base Image Creation

In the learning attitude, want to understand the creation of Docker Base image method, in the official website, in Baidu, in the relevant forums, find relevant information, here record the implementation of the steps,

I. Environment

Host operating system: OS X, need to install VirtualBox;
Container environment: CENTOS7

two. Install the system with VirtualBox, take CentOS 7 for example (Centos-7-x86_64-minimal-1503-01.iso)

To create a virtual machine and install CENTOS7, the detailed installation process is documented below.

* Installation process is simple, I have a slow speed here, not on the map, there is a need for friends to leave a mailbox, I send PDF. *

After installation, reboot and enter the system.

Three. Modify Network configuration

Modify the network configuration/etc/sysconfig/network-script/ifcfg-enp0s3.
Delete uuid,hwaddr
, modify Onboot=no to Onboot=yes, and then save.

$ ifconfig 
Cannot find a valid baseurl for Repo:base/7/x86_6

Restart network interface:
[root@centos7 ~] #ifdown enps03
[Root@centos7 ~]# Ifup enps03

$ yum Install ifconfig 
 hint: Nothing to do
 lists the package with the Yum provides command
$ ifconfig yum s ifconfig  
//Installation
$ yum-y Install Net-tools

Four. Install Docker

Install Epel (reference: http://www.tecmint.com/how-to-enable-epel-repository-for-rhel-centos-6-5/)
[Root@centos7 ~]# rpm- UVH http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-5.noarch.rpm

Modification/etc/yum.repos.d/ Centos-base.repo Enabled=0 changed to enabled=1
Vim/etc/yum.repos.d/centos-base.repo
[Centosplus]
enabled =1

installation Docker
[Root@centos7 yum.repos.d]# yum install


boot docker-io docker 
[Root@centos7 yum.repos.d]# Service Docker start

Five. Create an underlying mirror

The substitution variable replaces the $releasever in the/etc/yum.repos.d/centos-base.repo file with a 7 $basearch replaces the x86_64 Quick Replace method: vim/etc/yum.repos.d/centos- Base.repo:%s/$releasever/7/g:%s/$basearch/x86_64/g Create Docker image build script [Root@centos7 yum.repos.d]# cd/root [root@cent OS7 ~]# mkdir scripts [root@centos7 ~]# cd scripts/[Root@centos7 scripts]# vim createimage.sh then turn https://github.com/dock Er/docker/blob/master/contrib/mkimage-yum.sh the content in the file [Root@centos7 scripts]# chmod +x createimage.sh Create Image [     Root@centos7 scripts]#./createimage.sh Centos7base After successful creation, view and delete the currently running container [Root@centos7 tmp]# Docker images] REPOSITORY  TAG IMAGE ID CREATED VIRTUAL SIZE centos7base 7.1.1503 112ee00c2cbc 8 minutes ago 227.7        MB [Root@centos7 tmp]# Docker ps-all CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 752b9d49a079 centos7base:7.1.1503 "echo success" minutes ago exited (0) minutes ago M Ad_saha [Root@centos7 tmp]# DockER rm 752b9d49a079 752b9d49a079 [Root@centos7 tmp]# Docker ps-all CONTAINER ID IMAGE COMMAND CREATED     STATUS PORTS NAMES export Image [Root@centos7 tmp]# cd/tmp/[Root@centos7 tmp]# Docker Images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE centos7base 7.1.1503 112ee00c2cbc minutes ago 227.7 MB [Root@centos7 tmp]# docker save 112EE00C2CBC >/tmp/centos7base.tar [root@centos7 tmp]# ls Centos7base.tar KS-SCRI 

 Pt-l8tdo5 Yum.log [Root@centos7 tmp]#

Six. Docker Common commands

Docker Stop <container id>: A container used to stop running, and you can also use
docker start <container Id>: To start a container that has stopped.
Docker restart <container id>: You can restart a running container. This is equivalent to the first stop and start of a container.
Docker attach <container id>: Associating to a running container

delete Mirror: Docker rmi <image id> Docker
  RMI 2db1e85f26ba< c7/> Delete containers: Docker rm <container id>
  Docker rm c3bfb652a491

View the running container
  Docker ps-all

stop container:
  Exit

back into window
  docker start <container id>
  Docker attach <container id>

temporary exit container
  CTRL + P then CTRL + Q
Re-enter:
  Docker attach <container id>

Save the container as a mirror:
  Docker commit <container ID > <NAME>:<TAG>

Seven. Guide to the local mirror library

Go back to the host, copy the image exported from the virtual machine to the local hr:~ hr$ mkdir-p docker/images hr:~ hr$ cd docker/images/hr:images hr$ SCP Root@192.168.1.4:/tm
P/centos7base.tar.
Hr:images hr$ Ls-lah Total 469392 drwxr-xr-x 3 hr staff 102B 12 5 21:08.
Drwxr-xr-x 3 HR Staff 102B 12 5 21:05. -rw-r--r--1 hr Staff 229M 5 21:08 centos7base.tar boot docker Quick start Terminal load image package to Docker image Hr:images  hr$ Docker Load </users/hr/docker/images/centos7base.tar hr:images hr$ Docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE <none> <none> 112ee00c2cbc minutes ago 227.7 MB hello- World latest 975B84D108F1 7 weeks ago 960 B TAR equals none is just imported, change the tag name: Hr:images hr$, docker tag 112ee0 0C2CBC centos7base:7.1 hr:images hr$ docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE cen Tos7base 7.1 112ee00c2cbc minutes ago 227.7 MB Hello-world latest 975B84D108F1 7 weeks AG O 960 B Run Container: hr:images hr$ Docker run-i-T 112ee00c2cbc/bin/bash [ROOT@E948ACAE7B42/]# hostname e948acae7b42 [root@e948 

 Acae7b42/]# cat/etc/redhat-release CentOS Linux release 7.1.1503 (Core)

Eight. Release mirror to Docker hub

The premise is to register an account first: https://hub.docker.com/

1. Login

Docker login-username=< User name >-email=< email address >

2. Docker REPOSITORY required to modify the mirror tag

Docker tag <image id> user name/mirror name/tag
Docker tag 112EE00C2CBC honor/centos7base:7.1

3. Upload

Docker Push Honor/centos7base

Thank you for reading, I hope to help you, thank you for your support for this site!