9.2 7 Centos7 下安装  Docker
9.2.1 配置虚拟机
docker 官方文档要求必须运行在 Linux kernel 3.8 以上，所以需要安装在 Centos7
或者 Ubantu 系统上。
yum install lrzsz #安装上传下载组件
uname –a #检查当前 Linux 内核版本
查询结果：
Linux tdocker 3.10.0-327.el7.x86_64 #1 SMP Thu Nov 19 22:10:57 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux
9.2.2 VM 配置 NAT 模式网络上网
修改配置文件
cd /etc/sysconfig/network-scripts #进入网络配置目录
dir ifcfg* #找到网卡配置文件
ifcfg-eno16777736 ifcfg-lo
vi ifcfg-eno16777736
配置文件内容
TYPE=Ethernet
BOOTPROTO=static #改成 static，针对 NAT
NAME=eno16777736
UUID=4cc9c89b-cf9e-4847-b9ea-ac713baf4cc8
DEVICE=eno16777736
ONBOOT=yes #开机启动此网卡
IPADDR=192.168.163.30 #固定 IP 地址
NETMASK=255.255.255.0 #子网掩码
GATEWAY=192.168.163.2 #网关和 NAT 自动配置的相同，不同则无法登录
DNS1=192.168.163.2 #和网关相同
测试
centos7命令发生巨大变化
ip addr #查看 IP 地址 ip add
service network restart #重启网络
systemctl restart network.service #重启网络 centos7
vi /etc/hosts #127.0.0.1 dredis
hostname dreids #注意必须修改机器名 hostname
ping www.baidu.com #如果出现 baidu 的 ip 地址则表示网络连通
9.2.3 安装 Docker
9.2.3.1 第一步：安装工具包
$ sudo yum install -y yum-utils #安装工具包，缺少这些依赖将无法完成
执行结果：
Loaded plugins: fastestmirror, langpacks
base
| 3.6 kB 00:00:00
epel
| 4.3 kB 00:00:00
extras
| 3.4 kB 00:00:00
update
| 3.4 kB 00:00:00
(1/3): epel/7/x86_64/updateinfo
| 797 kB 00:00:00
(2/3): epel/7/x86_64/primary_db
| 4.7 MB 00:00:00
(3/3): update/7/x86_64/primary_db
| 4.8 MB 00:00:00
Loading mirror speeds from cached hostfile
Package yum-utils-1.1.31-40.el7.noarch already installed and latest
version
Nothing to do
9.2.3.2 第二步：设置远程仓库
$sudo yum-config-manager --add-repo
https://download.docker.com/linux/centos/docker-ce.repo
执行结果：
Loaded plugins: fastestmirror, langpacks
adding repo from:
https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo
to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
9.2.3.3 第三步：安装
$ sudo yum install docker-ce
执行结果：
Loaded plugins: fastestmirror, langpacks
docker-ce-stable
| 2.9 kB 00:00:00
docker-ce-stable/x86_64/primary_db
| 4.8 kB 00:00:00
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package docker-ce.x86_64 0:17.03.1.ce-1.el7.centos will be
installed
--> Processing Dependency: docker-ce-selinux >= 17.03.1.ce-1.el7.centos
for package: docker-ce-17.03.1.ce-1.el7.centos.x86_64
--> Processing Dependency: libcgroup for package:
docker-ce-17.03.1.ce-1.el7.centos.x86_64
--> Processing Dependency: libseccomp.so.2()(64bit) for package:
docker-ce-17.03.1.ce-1.el7.centos.x86_64
--> Running transaction check
---> Package docker-ce-selinux.noarch 0:17.03.1.ce-1.el7.centos will be
installed
--> Processing Dependency: policycoreutils-python for package:
docker-ce-selinux-17.03.1.ce-1.el7.centos.noarch
---> Package libcgroup.x86_64 0:0.41-11.el7 will be installed
---> Package libseccomp.x86_64 0:2.3.1-2.el7 will be installed
--> Running transaction check
---> Package policycoreutils-python.x86_64 0:2.5-11.el7_3 will be
installed
--> Processing Dependency: setools-libs >= 3.3.8-1 for package:
policycoreutils-python-2.5-11.el7_3.x86_64
--> Processing Dependency: libsemanage-python >= 2.5-5 for package:
policycoreutils-python-2.5-11.el7_3.x86_64
--> Processing Dependency: audit-libs-python >= 2.1.3-4 for package:
policycoreutils-python-2.5-11.el7_3.x86_64
--> Processing Dependency: python-IPy for package:
policycoreutils-python-2.5-11.el7_3.x86_64
--> Processing Dependency: libqpol.so.1(VERS_1.4)(64bit) for package:
policycoreutils-python-2.5-11.el7_3.x86_64
--> Processing Dependency: libqpol.so.1(VERS_1.2)(64bit) for package:
policycoreutils-python-2.5-11.el7_3.x86_64
--> Processing Dependency: libapol.so.4(VERS_4.0)(64bit) for package:
policycoreutils-python-2.5-11.el7_3.x86_64
--> Processing Dependency: checkpolicy for package:
policycoreutils-python-2.5-11.el7_3.x86_64
--> Processing Dependency: libqpol.so.1()(64bit) for package:
policycoreutils-python-2.5-11.el7_3.x86_64
--> Processing Dependency: libapol.so.4()(64bit) for package:
policycoreutils-python-2.5-11.el7_3.x86_64
--> Running transaction check
---> Package audit-libs-python.x86_64 0:2.6.5-3.el7_3.1 will be
installed
---> Package checkpolicy.x86_64 0:2.5-4.el7 will be installed
---> Package libsemanage-python.x86_64 0:2.5-5.1.el7_3 will be
installed
---> Package python-IPy.noarch 0:0.75-6.el7 will be installed
---> Package setools-libs.x86_64 0:3.3.8-1.1.el7 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
====================================================================
=================================================
Package Arch Version
Repository Size
====================================================================
=================================================
Installing:
docker-ce x86_64
17.03.1.ce-1.el7.centos docker-ce-stable 19 M
Installing for dependencies:
audit-libs-python x86_64 2.6.5-3.el7_3.1
update 70 k
checkpolicy x86_64 2.5-4.el7
base 290 k
docker-ce-selinux noarch
17.03.1.ce-1.el7.centos docker-ce-stable 28 k
libcgroup x86_64 0.41-11.el7
base 65 k
libseccomp x86_64 2.3.1-2.el7
base 56 k
libsemanage-python x86_64 2.5-5.1.el7_3
update 104 k
policycoreutils-python x86_64 2.5-11.el7_3
update 445 k
python-IPy noarch 0.75-6.el7
base 32 k
setools-libs x86_64 3.3.8-1.1.el7
base 612 k
Transaction Summary
====================================================================
=================================================
Install 1 Package (+9 Dependent packages)
Total download size: 20 M
Installed size: 24 M
Is this ok [y/d/N]: y
Downloading packages:
(1/10): audit-libs-python-2.6.5-3.el7_3.1.x86_64.rpm
| 70 kB 00:00:00
(2/10): checkpolicy-2.5-4.el7.x86_64.rpm
| 290 kB 00:00:00
(3/10): libseccomp-2.3.1-2.el7.x86_64.rpm
| 56 kB 00:00:00
(4/10): libcgroup-0.41-11.el7.x86_64.rpm
| 65 kB 00:00:00
(5/10): policycoreutils-python-2.5-11.el7_3.x86_64.rpm
| 445 kB 00:00:00
(6/10): setools-libs-3.3.8-1.1.el7.x86_64.rpm
| 612 kB 00:00:00
(7/10): libsemanage-python-2.5-5.1.el7_3.x86_64.rpm
| 104 kB 00:00:00
(8/10): python-IPy-0.75-6.el7.noarch.rpm
| 32 kB 00:00:00
warning:
/var/cache/yum/x86_64/7/docker-ce-stable/packages/docker-ce-selinux-17.
03.1.ce-1.el7.centos.noarch.rpm: Header V4 RSA/SHA512 Signature, key ID
621e9f35: NOKEY
Public key for docker-ce-selinux-17.03.1.ce-1.el7.centos.noarch.rpm is
not installed
(9/10): docker-ce-selinux-17.03.1.ce-1.el7.centos.noarch.rpm
| 28 kB 00:00:00
(10/10): docker-ce-17.03.1.ce-1.el7.centos.x86_64.rpm
| 19 MB 00:00:00
--------------------------------------------------------------------
-------------------------------------------------
Total
23 MB/s | 20 MB 00:00:00
Retrieving key from https://download.docker.com/linux/centos/gpg
Importing GPG key 0x621E9F35:
Userid : "Docker Release (CE rpm) docker@docker.com"
Fingerprint: 060a 61c5 1b55 8a7f 742b 77aa c52f eb6b 621e 9f35
From : https://download.docker.com/linux/centos/gpg
Is this ok [y/N]: y
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Installing : libcgroup-0.41-11.el7.x86_64
1/10
Installing : setools-libs-3.3.8-1.1.el7.x86_64
2/10
Installing : checkpolicy-2.5-4.el7.x86_64
3/10
Installing : libsemanage-python-2.5-5.1.el7_3.x86_64
4/10
Installing : audit-libs-python-2.6.5-3.el7_3.1.x86_64
5/10
Installing : python-IPy-0.75-6.el7.noarch
6/10
Installing : policycoreutils-python-2.5-11.el7_3.x86_64
7/10
Installing : docker-ce-selinux-17.03.1.ce-1.el7.centos.noarch
8/10
setsebool: SELinux is disabled.
libsemanage.semanage_direct_install_info: Overriding docker module at
lower priority 100 with module at priority 400.
Installing : libseccomp-2.3.1-2.el7.x86_64
9/10
Installing : docker-ce-17.03.1.ce-1.el7.centos.x86_64
10/10
Verifying : libseccomp-2.3.1-2.el7.x86_64
1/10
Verifying : python-IPy-0.75-6.el7.noarch
2/10
Verifying : audit-libs-python-2.6.5-3.el7_3.1.x86_64
3/10
Verifying : libsemanage-python-2.5-5.1.el7_3.x86_64
4/10
Verifying : docker-ce-selinux-17.03.1.ce-1.el7.centos.noarch
5/10
Verifying : libcgroup-0.41-11.el7.x86_64
6/10
Verifying : policycoreutils-python-2.5-11.el7_3.x86_64
7/10
Verifying : docker-ce-17.03.1.ce-1.el7.centos.x86_64
8/10
Verifying : checkpolicy-2.5-4.el7.x86_64
9/10
Verifying : setools-libs-3.3.8-1.1.el7.x86_64
10/10
Installed:
docker-ce.x86_64 0:17.03.1.ce-1.el7.centos
Dependency Installed:
audit-libs-python.x86_64 0:2.6.5-3.el7_3.1
checkpolicy.x86_64 0:2.5-4.el7
docker-ce-selinux.noarch 0:17.03.1.ce-1.el7.centos
libcgroup.x86_64 0:0.41-11.el7
libseccomp.x86_64 0:2.3.1-2.el7
libsemanage-python.x86_64 0:2.5-5.1.el7_3
policycoreutils-python.x86_64 0:2.5-11.el7_3
python-IPy.noarch 0:0.75-6.el7
setools-libs.x86_64 0:3.3.8-1.1.el7
Complete!
9.2.3.4 第四步：启动
或者
$ sudo service docker start
service docker start #启动 docker
chkconfig docker on #加入开机启动
9.2.3.5 第五步：查看版本
$ sudo docker version
执行结果：
Client:
Version: 17.03.1-ce
API version: 1.27
Go version: go1.7.5
Git commit: c6d412e
Built: Mon Mar 27 17:05:44 2017
OS/Arch: linux/amd64
9.2.3.6 第六步：校验
$ sudo docker run hello-world
执行结果：
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
78445dd45222: Pull complete
Digest:
sha256:c5515758d4c5e1e838e9cd307f6c6a0d620b5e07e6f927b07d05f6d12a1ac8d7
Status: Downloaded newer image for hello-world:latest
Hello from Docker!
This message shows that your installation appears to be working
correctly.
To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
3. The Docker daemon created a new container from that image which runs
the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which
sent it
to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
https://cloud.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/engine/userguide/
9.2.4 查看 Docker 版本
docker --help #帮助
docker –v #简单查看版本
docker version #查看版本
Client version: 1.7.1
Client API version: 1.19
Go version (client): go1.4.2
Git commit (client): 786b29d/1.7.1
OS/Arch (client): linux/amd64
Server version: 1.7.1
Server API version: 1.19
Go version (server): go1.4.2
Git commit (server): 786b29d/1.7.1
OS/Arch (server): linux/amd64
docker info #查看信息
Containers: 0
Images: 2
Storage Driver: devicemapper
Pool Name: docker-253:0-34097258-pool
Pool Blocksize: 65.54 kB
Backing Filesystem: xfs
Data file: /dev/loop0
Metadata file: /dev/loop1
Data Space Used: 308.3 MB
Data Space Total: 107.4 GB
Data Space Available: 16.08 GB
Metadata Space Used: 782.3 kB
Metadata Space Total: 2.147 GB
Metadata Space Available: 2.147 GB
Udev Sync Supported: true
Deferred Removal Enabled: false
Data loop file: /var/lib/docker/devicemapper/devicemapper/data
Metadata loop file:
/var/lib/docker/devicemapper/devicemapper/metadata
Library Version: 1.02.107-RHEL7 (2015-10-14)
Execution Driver: native-0.2
Logging Driver: json-file
Kernel Version: 3.10.0-327.el7.x86_64
Operating System: CentOS Linux 7 (Core)
CPUs: 4
Total Memory: 985.6 MiB
Name: localhost.localdomain
ID: B5ZW:FJXF:FNUD:OLH7:FCNI:56DJ:XEQY:I6J4:PPHQ:OKRW:CIJK:Y26P
9.2.5 安装其它产品的两种方式
docker 安装其它产品有两种方式
方式一：通过拉取事先做好的镜像，例如下面 redis 的安装方式
方式二：通过 Dockerfile 来构建新的镜像，例如下面 tomcat 的安装方式
9.2.6 组成结构
docker 会自动给 docker 容器配置一个 vip 虚拟 ip 地址
bash-4.1#提示符就代表进入 docker 容器内部