Get Docker CE for CentOS

configure Docker source

Detail url：https://docs.docker.com/engine/installation/linux/docker-ce/centos/

1.Uninstall old versions

Older versions of Docker were called docker or docker-engine. If these are installed, uninstall them, along with associated dependencies.

$ sudo yum remove docker docker-common docker-selinux docker-engine

2.Set up the repository

• Install required packages

$ sudo yum install -y yum-utils device-mapper-persistent-data lvm2

• set up the stable repository

$ sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

3.Install Docker CE

$ sudo yum install docker-ce

4.Start Docker

$ sudo systemctl start docker

5.running the hello-world image

$ sudo docker run hello-world

6.Docker Hub

login

vim /etc/docker/daemon.json

sudo mkdir -p /etc/dockersudo tee /etc/docker/daemon.json <<-'EOF'{  "registry-mirrors": ["https://0i5z79j3.mirror.aliyuncs.com"]}EOFsudo systemctl daemon-reloadsudo systemctl restart docker

7.Docker start remote manager --centos not this step

• modify configure

vim /etc/systemd/system/multi-user.target.wants/docker.service

ExecStart=/usr/bin/dockerd -H fd:// -H tcp://0.0.0.0

• systemctl daemon-reload
• systemctl restart docker
• $docker -H 127.0.0.1 info

8.Docker run stop delete

[root@master ~]# docker images[root@master ~]# docker ps -a

DockerFile

FROM scratchCOPY hello /CMD ["/hello"]

[root@master ~]# docker pull centos

FROM scratch    ADD centos-7-docker.tar.xz /    LABEL name="CentOS Base Image" \    vendor="CentOS" \    license="GPLv2" \    build-date="20170911"    CMD ["/bin/bash"]

#

uname -r

# docker run -ti centos /bin/bash

Dockerfile

# Version: 0.0.1FROM centos     1.新镜像不再是从 scratch 开始，而是直接在 centos base 镜像上构建。MAINTAINER wzlinuxRUN yum update && yum install -y emacs   2.安装 emacs 编辑器。RUN yum install -y apache2               3.安装 apache2。CMD ["/bin/bash"]                        4.容器启动时运行 bash。[root@master ~]# docker build -t rhel_httpd2:2.4 .

[root@master ~]# docker rm $(docker ps -qa)

Custom image

[root@master tmp]# docker run -ti rhel /bin/bash[root@f54311d5c910 /]# yum -y install httpd[root@master tmp]# docker ps -a[root@master tmp]# docker commit f54311d5c910 wzlinux/centos_with_centos[root@master tmp]# docker images

push local image to docker repository

[root@master tmp]# docker login ---login

building private repository

docker pull registry docker images docker run -d -p 5000:5000 registry:latest docker ps docker tag 5709795eeffa localhost:5000/leejaylinux/mysql:2.0 docker images docker push localhost:5000/leejaylinux/mysql

enter container two way

1. root@ubuntu:~# docker exec -ti 780ec986be0f /bin/bash

2. root@ubuntu:~# docker start 0972061092ac

   root@ubuntu:~# docker attach 0972061092ac

能够动态查看日志的产生

[root@master tmp]# docker logs -f ba4681c485e5