一 、安装Docker
1、配置yum源，配置第三方yum源（真机操作）
[root@room9pc01 ~]# mkdir /var/ftp/docker
[root@room9pc01 ~]# mv docker-engine-* /var/ftp/docker
[root@room9pc01 ~]# ls /var/ftp/docker
docker-engine-1.12.1-1.el7.centos.x86_64.rpm
docker-engine-selinux-1.12.1-1.el7.centos.noarch.rpm
[root@room9pc01 ~]# createrepo /var/ftp/docker/
2、配置IP（虚拟机配置静态ip）docker1和docker2主机同样操作；
IP为192.168.1.10和192.168.1.20
[root@localhost ~]# echo docker1 > /etc/hostname
[root@localhost ~]# hostname docker1
[root@localhost ~]# echo docker2 > /etc/hostname
[root@localhost ~]# hostname docker2
[root@docker1 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
‘# Generated by dracut initrd
DEVICE=“eth0”
ONBOOT=“yes”
IPV6INIT=“no”
IPV4_FAILURE_FATAL=“no”
NM_CONTROLLED=“no”
TYPE=“Ethernet”
BOOTPROTO=“static”
IPADDR=“192.168.1.10”
PREFIX=24
GATEWAY=192.168.1.254
[root@docker1 ~]# systemctl restart network
[root@docker2 ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
’# Generated by dracut initrd
DEVICE=“eth0”
ONBOOT=“yes”
IPV6INIT=“no”
IPV4_FAILURE_FATAL=“no”
NM_CONTROLLED=“no”
TYPE=“Ethernet”
BOOTPROTO=“static”
IPADDR=“192.168.1.20”
PREFIX=24
GATEWAY=192.168.1.254
[root@docker1 ~]# systemctl restart network
3、配置yum客户端（docker1和docker2主机同样操作）
[root@docker1 ~]# vim /etc/yum.repos.d/local.repo
[local_repo]
name=CentOS-KaTeX parse error: Expected 'EOF', got '#' at position 169: …root@docker2 ~]#̲ vim /etc/yum.r…releasever - Base
baseurl=“ftp://192.168.1.254/system”
enabled=1
gpgcheck=1
[loca]
name=local
baseurl=“ftp://192.168.1.254/docker”
enabled=1
gpgcheck=0
4、安装docker（docker1和docker2主机同样操作）
[root@docker1 ~]# yum -y install docker-engine
[root@docker1 ~]# systemctl restart docker
[root@docker1 ~]# systemctl enable docker
[root@docker1 ~]# ifconfig //有docker0说明环境部署完成
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0
ether 02:42:3e:e7:3f:6e txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@docker2 ~]# docker version //查看版本
[root@docker2 ~]# yum -y install docker-engine
[root@docker2 ~]# systemctl restart docker
[root@docker2 ~]# systemctl enable docker
[root@docker2 ~]# ifconfig //有docker0说明环境部署完成
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0
ether 02:42:53:82:b9:d4 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@docker2 ~]# docker version //查看版本
二、镜像基本操作
1、下载镜像
[root@docker1 ~]# docker pull busybox
Using default tag: latest
latest: Pulling from library/busybox
8c5a7da1afbc: Pull complete
Digest: sha256:cb63aa0641a885f54de20f61d152187419e8f6b159ed11a251a09d115fdff9bd
Status: Downloaded newer image for busybox:latest
2、上传镜像
[root@docker1 ~]# docker push busybox
3、查看镜像
[root@docker1 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
busybox latest e1ddd7948a1c 4 weeks ago 1.163 MB
4、查找busybox镜像
[root@docker1 ~]# docker search busybox
5、导出busybox镜像为busybox.tar
[root@docker1 ~]# docker save busybox:latest > busybox.tar
[root@docker1 ~]# ls
busybox.tar
6、导入镜像
[root@docker1 ~]# scp busybox.tar 192.168.1.20:/root
[root@docker2 ~]# ls
busybox.tar
[root@docker2 ~]# docker load < busybox.tar
f9d9e4e6e2f0: Loading layer [==================================================>] 1.378 MB/1.378 MB
Loaded image: busybox:latest[=> ] 32.77 kB/1.378 MB
[root@docker2 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
busybox latest e1ddd7948a1c 4 weeks ago 1.163 MB
7、删除镜像
[root@docker2 ~]# docker rmi busybox
Untagged: busybox:latest
Deleted: sha256:e1ddd7948a1c31709a23cc5b7dfe96e55fc364f90e1cebcde0773a1b5a30dcda
Deleted: sha256:f9d9e4e6e2f0689cd752390e14ade48b0ec6f2a488a05af5ab2f9ccaf54c299d
8、启动镜像
启动centos镜像生成一个容器
启动镜像时若不知道后面的命令加什么:
可以猜（如：/bin/bash、/bin/sh）；可以不加后面的命令，默认启动
[root@docker1 docker_images]# docker run -it centos /bin/bash
[root@7a652fc72a9f /]# ls /
anaconda-post.log bin dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var
[root@7a652fc72a9f /]# cd /etc/yum.repos.d/
[root@7a652fc72a9f yum.repos.d]# ls
CentOS-Base.repo CentOS-Debuginfo.repo CentOS-Sources.repo CentOS-fasttrack.repo
CentOS-CR.repo CentOS-Media.repo CentOS-Vault.repo
[root@7a652fc72a9f yum.repos.d]# rm -rf C*
[root@7a652fc72a9f yum.repos.d]# ls
[root@7a652fc72a9f yum.repos.d]#vi dvd.repo //在容器里面配置一个yum源
[local]
name=local
baseurl=ftp://192.168.1.254/system
enable=1
gpgcheck=0
[root@7a652fc72a9f yum.repos.d]# yum -y install net-tools //安装软件
[root@7a652fc72a9f yum.repos.d]# exit
exit
三、镜像与容器常用指令
镜像常用命令
1、查看后台运行的容器
[root@docker1 ~]# docker run -d nginx //启动nginx的镜像
[root@docker1 ~]# docker ps //查看后台运行的容器
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
56ec8154f8e0 nginx:latest “nginx -g 'daemon off” 17 minutes ago Up 12 minutes 80/tcp, 443/tcp
2、只显示容器ID
[root@docker1 docker_images]# docker ps -q
3、显示所有的容器,包括没有启动的
[root@docker1 docker_images]# docker ps -a
4、显示所有的容器ID
[root@docker1 docker_images]# docker ps -qa
5、查看centos镜像历史（制作过程）
[root@docker1 docker_images]# docker history centos
6、删除镜像，启动容器时删除镜像会失败，先删除容器,再删除镜像
格式：docker rmi 镜像名
[root@docker1 docker_images]# docker rmi nginx //nginx为镜像名
Error response from daemon: conflict: unable to remove repository reference “nginx” (must force) - container 4f83871aa42e is using its referenced image a5311a310510 //删除时报错
[root@docker1 docker_images]# docker stop 4f
4f
[root@docker1 docker_images]# docker rm 4f
4f
[root@docker1 docker_images]# docker rmi nginx //成功删除
7、修改镜像的名称和标签,默认标签为latest
[root@docker1 docker_images]# docker tag centos:latest cen:v1
8、查看镜像的底层信息
[root@docker1 docker_images]# docker inspect centos
9、修改镜像的标签
[root@docker1 docker_images]# docker tag centos:latest cen:v1
[root@docker1 docker_images]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
cen v1 e934aafc2206 5 months ago 198.6 MB
[root@docker1 docker_images]# docker rmi centos //删除centos
[root@localhost ~]# docker run -it centos
//启动的时候，因为是用标签标签启动的，所以会重新通过ID下载
[root@localhost ~]# docker run -it centos
Unable to find image ‘centos:latest’ locally
latest: Pulling from library/centos
Digest: sha256:989b936d56b1ace20ddf855a301741e52abca38286382cba7f44443210e96d16
Status: Downloaded newer image for centos:latest
[root@localhost ~]# docker run -it cen:v1 //通过新建的标签启动cen:v1
容器命令
1、关闭容器
命令：docker stop 容器ID
[root@docker1 docker_images]# docker stop 0f //0f为容器ID
0f
2、启动容器
[root@docker1 docker_images]# docker start 0f
0f
3、重启容器
[root@docker1 docker_images]# docker restart 0f
0f
4、删除容器
运行中删除不掉，先关闭容器
[root@docker1 docker_images]# docker rm 0f //删除失败
[root@docker1 docker_images]# docker stop 0f //关闭容器
0f
[root@docker1 docker_images]# docker rm 0f //删除成功
0f
5、接容器attach|exec
[root@docker1 docker_images]# docker attach 0f
[root@docker1 docker_images]# docker ps //容器关闭
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@docker1 docker_images]# docker exec -it 0f /bin/bash
[root@docker1 docker_images]# docker ps //容器不会关闭
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
0b3c50284a1c centos:v1 “/bin/bash” 15 minutes ago Up 15 minutes tiny_lamarr
[root@docker1 docker_images]# docker top f7 //查看容器进程列表
[root@localhost ~]# docker run -itd centos:latest
[root@0b3c50284a1c /]# ps
PID TTY TIME CMD
1 ? 00:00:00 bash
13 ? 00:00:00 ps
[root@docker1 docker_images]# docker exec -it 85 /bin/bash
root@85c6b0b62235:/# sleep 50 &
[1] 9
root@85c6b0b62235:/# exit
exit
[root@docker1 docker_images]#docker top 85
UID PID PPID C STIME TTY TIME CMD
root 2744 2729 0 18:01 pts/4 00:00:00 /bin/bash
6、过滤查看mac和ip地址
[root@docker1 docker_images]# docker inspect -f ‘{{.NetworkSettings.MacAddress}}’ 4f
02:42:ac:11:00:03
[root@docker1 docker_images]# docker inspect -f ‘{{.NetworkSettings.IPAddress}}’ 4f
172.17.0.3
7、修改nginx的显示内容
[root@docker1 docker_images]# docker run -it nginx:latest
[root@docker1 docker_images]# docker exec -it 56 /bin/bash
root@56ec8154f8e0:/# nginx -T /usr/share/nginx/html/
nginx: invalid option: “/usr/share/nginx/html/” //查找并显示结果
root@56ec8154f8e0:/# echo aaa > /usr/share/nginx/html/index.html
//修改主页显示的内容
root@56ec8154f8e0:/# nginx -T
root@56ec8154f8e0:/# cat /usr/share/nginx/html/index.html
aaa
8、过滤查看nginx的ip地址
[root@docker1 ~]# docker inspect -f ‘{{.NetworkSettings.IPAddress}}’ 56
172.17.0.5
[root@docker1 ~]# curl 172.17.0.5
aaa