摘要： 安装docker，常用命令
安装docker
yum install docker
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配置国内镜像源（提速）
国内加速源：https://www.daocloud.io/mirror.html#accelerator-doc
curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://0fc8f023.m.daocloud.io
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下载docker镜像
- 搜索镜像
docker search centos
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[root@cloud CentOS-YUM]# docker search centos
INDEX NAME DESCRIPTION STARS OFFICIAL AUTOMATED
docker.io docker.io/centos The official build of CentOS. 2987 [OK]
docker.io docker.io/jdeathe/centos-ssh CentOS-6 6.8 x86_64 / CentOS-7 7.3.1611 x8... 55 [OK]
docker.io docker.io/nimmis/java-centos This is docker images of CentOS 7 with dif... 20 [OK]
docker.io docker.io/consol/centos-xfce-vnc Centos container with "headless" VNC sessi... 18 [OK]
docker.io docker.io/million12/centos-supervisor Base CentOS-7 with supervisord launcher, h... 12 [OK]
docker.io docker.io/torusware/speedus-centos Always updated official CentOS docker imag... 8
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- 下载镜像
docker pull centos:6 #下载centos6
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- 查看镜像
docker images #查看镜像
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启动容器
- 创建容器实例
[root@cloud ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ssh-centos6 latest 670e6db182f5 5 days ago 497.1 MB
docker.io/centos latest 67591570dd29 3 weeks ago 191.8 MB
docker.io/centos 6 8315978ceaaa 9 weeks ago 194.6 MB
[root@cloud ~]# docker run -i -t --name=centos10 ssh-centos6 /bin/bash #用镜像ssh-centos6创建容器，设置名称为centos10
[root@e308c0493046 /]#
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docker命令
# 查看运行中的容器
docker ps
# 查看所有容器
docker ps -a
# 退出容器
按Ctrl+D 即可退出当前容器【但退出后会停止容器】
# 退出不停止容器：
组合键：Ctrl+P+Q
# 启动容器
docker start 容器名或ID
# 进入容器
docker attach 容器名或ID
# 停止容器
docker start 容器名或ID
# 删除全部容器--慎用
docker stop $(docker ps -q) & docker rm $(docker ps -aq)
#保存容器，生成镜像
docker commit 容器ID 镜像名称
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docker配置
限制容器资源
# CPU使用0-3总共4个核心，内存1G ,--net=none不配置网络（桥接模式是pipework设置网络）
docker run -itd --net=none --name=centos07 --cpuset-cpus="0-3" -m 1024M --memory-reservation 1024M centos6-132.97.8.7-170106_2 /bin/bash
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更改存储目录
#复制docker存储目录
rsync -aXS /var/lib/docker/. /home/docker
#更改 docker 存储文件目录
ln -s /home/docker /var/lib/docker
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设置存储大小
# ubuntu在/etc/default/docker
# centos在/etc/sysconfig/docker-storage
cat /etc/sysconfig/docker-storage
DOCKER_STORAGE_OPTIONS="--storage-opt dm.loopdatasize=2000G --storage-opt dm.loopmetadatasize=10G --storage-opt dm.fs=ext4 --storage-opt dm.basesize=20G"
#dm.loopdatasize=2000G是指存放数据的数据库空间为2t，默认是100g
#dm.loopmetadatasize=10G是存放Metadata数据空间为10g，默认是2g
#dm.fs=ext4是指容器磁盘分区为ext4
#dm.basesize=20G是指容器根分区默认为20g，默认是10g
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docker桥接模式
linux桥接网络配置
[root@localhost ~]# cd /etc/sysconfig/network-scripts/
[root@localhost network-scripts]# cp ifcfg-eth0 ifcfg-br0
[root@localhost network-scripts]# vi ifcfg-eth0
//改成这样
DEVICE=eth0
HWADDR=00:0C:29:06:A2:35
TYPE=Ethernet
UUID=34b706cc-aa46-4be3-91fc-d1f48c301f23
ONBOOT=yes
BRIDGE=br0
NM_CONTROLLED=yes
BOOTPROTO=static
[root@localhost network-scripts]# vi ifcfg-br0
//改成这样
DEVICE=br0
TYPE=Bridge
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.216.131
NETMASK=255.255.255.0
GATEWAY=192.168.216.2
DNS=8.8.8.8
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- 重启网卡
service network restart
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设置启动参数
# centos 在/etc/sysconfig/docker
# 其他操作系统请前往下面的网址
# https://docs.docker.com/installation/#installation
vi /etc/sysconfig/docker #在OPTIONS='--selinux-enabled'这行中修改为OPTIONS='--selinux-enabled -b=br0'即让docker服务启动时使用br0网卡进行桥接
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安装pipework
git clone https://github.com/jpetazzo/pipework
cp ~/pipework/pipework /usr/local/bin/
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启动手动设置网络的容器
docker run -itd --net=none --name=centos06 --cpuset-cpus="0-3" -m 1024M --memory-reservation 1024M ssh-centos6 /bin/bash
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使用pipework设置IP
pipework br0 centos06 132.97.8.6/24@132.97.8.1
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进去docker查看IP
docker attach centos06
ifconfig
service sshd restart #重启ssh
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docker开机启动脚本
vi docker_start.sh
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#! /bin/bash
# chkconfig: 2345 10 90
# description: docker
service docker start
docker start centos06
docker start centos07
pipework br0 centos06 132.97.8.6/24@132.97.8.1
pipework br0 centos07 132.97.8.7/24@132.97.8.1
docker exec -i centos06 service sshd restart
docker exec -i centos07 service sshd restart
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1、将脚本移动到/etc/rc.d/init.d目录下
mv /home/xy/docker_start.sh /etc/rc.d/init.d
2、增加脚本的可执行权限
chmod +x /etc/rc.d/init.d/docker_start.sh
3、添加脚本到开机自动启动项目中
cd /etc/rc.d/init.d
chkconfig --add docker_start.sh
chkconfig docker_start.sh on
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其他资料
# 5分钟弄懂Docker！
http://www.csdn.net/article/2014-07-02/2820497-what%27s-docker
# docker操作实例，图文教程
http://blog.csdn.net/wuzhilon88/article/details/41621285/