小白第一次接触Docker，网上找了好多教程，有很多都不行，找了好久找到一个靠谱的，所以自己记一下方便日后安装。
感谢云雀https://www.yuque.com/grasilife/docker/install-centos
官谢docker官方文档https://docs.docker.com/install/linux/docker-ce/centos/
1.安装之前注意下自己的操作系统的内核版本
[root@localhost ~]# uname -r
3.10.0-862.el7.x86_64
建议安装版本大于3.10，不要安装太老的centos版本！！
2.使用 yum 安装
[root@localhost ~]# sudo yum install -y yum-utils \
> device-mapper-persistent-data \
> lvm2
Loaded plugins: fastestmirror
Determining fastest mirrors
* base: mirrors.nju.edu.cn
* extras: mirrors.163.com
* updates: centos.ustc.edu.cn
base | 3.6 kB 00:00:00
extras | 3.4 kB 00:00:00
updates | 3.4 kB 00:00:00
(1/4): extras/7/x86_64/primary_db | 180 kB 00:00:00
(2/4): base/7/x86_64/primary_db | 6.0 MB 00:00:07
(3/4): base/7/x86_64/group_gz | 166 kB 00:00:15
(4/4): updates/7/x86_64/primary_db | 2.5 MB 00:00:18
Package device-mapper-persistent-data-0.7.3-3.el7.x86_64 already installed and latest version
Resolving Dependencies
--> Running transaction check
---> Package lvm2.x86_64 7:2.02.177-4.el7 will be updated
---> Package lvm2.x86_64 7:2.02.180-10.el7_6.3 will be an update
--> Processing Dependency: lvm2-libs = 7:2.02.180-10.el7_6.3 for package: 7:lvm2-2.02.180-10.el7_6.3.x86_64
---> Package yum-utils.noarch 0:1.1.31-50.el7 will be installed
--> Processing Dependency: python-kitchen for package: yum-utils-1.1.31-50.el7.noarch
--> Processing Dependency: libxml2-python for package: yum-utils-1.1.31-50.el7.noarch
--> Running transaction check
---> Package libxml2-python.x86_64 0:2.9.1-6.el7_2.3 will be installed
---> Package lvm2-libs.x86_64 7:2.02.177-4.el7 will be updated
---> Package lvm2-libs.x86_64 7:2.02.180-10.el7_6.3 will be an update
--> Processing Dependency: device-mapper-event = 7:1.02.149-10.el7_6.3 for package: 7:lvm2-libs-2.02.180-10.el7_6.3.x86_64
---> Package python-kitchen.noarch 0:1.1.1-5.el7 will be installed
--> Processing Dependency: python-chardet for package: python-kitchen-1.1.1-5.el7.noarch
--> Running transaction check
---> Package device-mapper-event.x86_64 7:1.02.146-4.el7 will be updated
---> Package device-mapper-event.x86_64 7:1.02.149-10.el7_6.3 will be an update
--> Processing Dependency: device-mapper-event-libs = 7:1.02.149-10.el7_6.3 for package: 7:device-mapper-event-1.02.149-10.el7_6.3.x86_64
--> Processing Dependency: device-mapper = 7:1.02.149-10.el7_6.3 for package: 7:device-mapper-event-1.02.149-10.el7_6.3.x86_64
---> Package python-chardet.noarch 0:2.2.1-1.el7_1 will be installed
--> Running transaction check
---> Package device-mapper.x86_64 7:1.02.146-4.el7 will be updated
--> Processing Dependency: device-mapper = 7:1.02.146-4.el7 for package: 7:device-mapper-libs-1.02.146-4.el7.x86_64
---> Package device-mapper.x86_64 7:1.02.149-10.el7_6.3 will be an update
---> Package device-mapper-event-libs.x86_64 7:1.02.146-4.el7 will be updated
---> Package device-mapper-event-libs.x86_64 7:1.02.149-10.el7_6.3 will be an update
--> Running transaction check
---> Package device-mapper-libs.x86_64 7:1.02.146-4.el7 will be updated
---> Package device-mapper-libs.x86_64 7:1.02.149-10.el7_6.3 will be an update
--> Finished Dependency Resolution
Dependencies Resolved
=============================================================================================================================================
Package Arch Version Repository Size
=============================================================================================================================================
Installing:
yum-utils noarch 1.1.31-50.el7 base 121 k
Updating:
lvm2 x86_64 7:2.02.180-10.el7_6.3 updates 1.3 M
Installing for dependencies:
libxml2-python x86_64 2.9.1-6.el7_2.3 base 247 k
python-chardet noarch 2.2.1-1.el7_1 base 227 k
python-kitchen noarch 1.1.1-5.el7 base 267 k
Updating for dependencies:
device-mapper x86_64 7:1.02.149-10.el7_6.3 updates 292 k
device-mapper-event x86_64 7:1.02.149-10.el7_6.3 updates 188 k
device-mapper-event-libs x86_64 7:1.02.149-10.el7_6.3 updates 188 k
device-mapper-libs x86_64 7:1.02.149-10.el7_6.3 updates 320 k
lvm2-libs x86_64 7:2.02.180-10.el7_6.3 updates 1.1 M
Transaction Summary
=============================================================================================================================================
Install 1 Package (+3 Dependent packages)
Upgrade 1 Package (+5 Dependent packages)
Total download size: 4.2 M
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
warning: /var/cache/yum/x86_64/7/updates/packages/device-mapper-event-libs-1.02.149-10.el7_6.3.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID f4a80eb5: NOKEY
Public key for device-mapper-event-libs-1.02.149-10.el7_6.3.x86_64.rpm is not installed
(1/10): device-mapper-event-libs-1.02.149-10.el7_6.3.x86_64.rpm | 188 kB 00:00:00
(2/10): device-mapper-1.02.149-10.el7_6.3.x86_64.rpm | 292 kB 00:00:01
(3/10): lvm2-libs-2.02.180-10.el7_6.3.x86_64.rpm | 1.1 MB 00:00:02
(4/10): lvm2-2.02.180-10.el7_6.3.x86_64.rpm | 1.3 MB 00:00:02
Public key for python-kitchen-1.1.1-5.el7.noarch.rpm is not installed=========================- ] 703 kB/s | 3.1 MB 00:00:01 ETA
(5/10): python-kitchen-1.1.1-5.el7.noarch.rpm | 267 kB 00:00:00
(6/10): yum-utils-1.1.31-50.el7.noarch.rpm | 121 kB 00:00:00
(7/10): device-mapper-event-1.02.149-10.el7_6.3.x86_64.rpm | 188 kB 00:00:16
(8/10): libxml2-python-2.9.1-6.el7_2.3.x86_64.rpm | 247 kB 00:00:16
(9/10): device-mapper-libs-1.02.149-10.el7_6.3.x86_64.rpm | 320 kB 00:00:16
(10/10): python-chardet-2.2.1-1.el7_1.noarch.rpm | 227 kB 00:00:15
---------------------------------------------------------------------------------------------------------------------------------------------
Total 225 kB/s | 4.2 MB 00:00:19
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Importing GPG key 0xF4A80EB5:
Userid : "CentOS-7 Key (CentOS 7 Official Signing Key) <security@centos.org>"
Fingerprint: 6341 ab27 53d7 8a78 a7c2 7bb1 24c6 a8a7 f4a8 0eb5
Package : centos-release-7-5.1804.el7.centos.x86_64 (@anaconda)
From : /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Updating : 7:device-mapper-1.02.149-10.el7_6.3.x86_64 1/16
Updating : 7:device-mapper-libs-1.02.149-10.el7_6.3.x86_64 2/16
Updating : 7:device-mapper-event-libs-1.02.149-10.el7_6.3.x86_64 3/16
Updating : 7:device-mapper-event-1.02.149-10.el7_6.3.x86_64 4/16
Updating : 7:lvm2-libs-2.02.180-10.el7_6.3.x86_64 5/16
Installing : python-chardet-2.2.1-1.el7_1.noarch 6/16
Installing : python-kitchen-1.1.1-5.el7.noarch 7/16
Installing : libxml2-python-2.9.1-6.el7_2.3.x86_64 8/16
Installing : yum-utils-1.1.31-50.el7.noarch 9/16
Updating : 7:lvm2-2.02.180-10.el7_6.3.x86_64 10/16
Cleanup : 7:lvm2-2.02.177-4.el7.x86_64 11/16
Cleanup : 7:lvm2-libs-2.02.177-4.el7.x86_64 12/16
Cleanup : 7:device-mapper-event-1.02.146-4.el7.x86_64 13/16
Cleanup : 7:device-mapper-event-libs-1.02.146-4.el7.x86_64 14/16
Cleanup : 7:device-mapper-1.02.146-4.el7.x86_64 15/16
Cleanup : 7:device-mapper-libs-1.02.146-4.el7.x86_64 16/16
Verifying : yum-utils-1.1.31-50.el7.noarch 1/16
Verifying : 7:device-mapper-libs-1.02.149-10.el7_6.3.x86_64 2/16
Verifying : libxml2-python-2.9.1-6.el7_2.3.x86_64 3/16
Verifying : 7:device-mapper-event-libs-1.02.149-10.el7_6.3.x86_64 4/16
Verifying : python-chardet-2.2.1-1.el7_1.noarch 5/16
Verifying : python-kitchen-1.1.1-5.el7.noarch 6/16
Verifying : 7:device-mapper-event-1.02.149-10.el7_6.3.x86_64 7/16
Verifying : 7:lvm2-libs-2.02.180-10.el7_6.3.x86_64 8/16
Verifying : 7:lvm2-2.02.180-10.el7_6.3.x86_64 9/16
Verifying : 7:device-mapper-1.02.149-10.el7_6.3.x86_64 10/16
Verifying : 7:lvm2-2.02.177-4.el7.x86_64 11/16
Verifying : 7:device-mapper-event-libs-1.02.146-4.el7.x86_64 12/16
Verifying : 7:device-mapper-1.02.146-4.el7.x86_64 13/16
Verifying : 7:device-mapper-event-1.02.146-4.el7.x86_64 14/16
Verifying : 7:lvm2-libs-2.02.177-4.el7.x86_64 15/16
Verifying : 7:device-mapper-libs-1.02.146-4.el7.x86_64 16/16
Installed:
yum-utils.noarch 0:1.1.31-50.el7
Dependency Installed:
libxml2-python.x86_64 0:2.9.1-6.el7_2.3 python-chardet.noarch 0:2.2.1-1.el7_1 python-kitchen.noarch 0:1.1.1-5.el7
Updated:
lvm2.x86_64 7:2.02.180-10.el7_6.3
Dependency Updated:
device-mapper.x86_64 7:1.02.149-10.el7_6.3 device-mapper-event.x86_64 7:1.02.149-10.el7_6.3
device-mapper-event-libs.x86_64 7:1.02.149-10.el7_6.3 device-mapper-libs.x86_64 7:1.02.149-10.el7_6.3
lvm2-libs.x86_64 7:2.02.180-10.el7_6.3
Complete!
看到compkete就表示已经好了！
鉴于国内网络问题，强烈建议使用国内源，官方源请在注释中查看。
执行下面的命令添加 yum 软件源：
[root@localhost ~]# sudo yum-config-manager \
> --add-repo \
> http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
Loaded plugins: fastestmirror
adding repo from: http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
grabbing file http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
这里的源换一下，换成阿里云的！
3.安装 Docker CE
更新 yum 软件源缓存，并安装 docker-ce。
[root@localhost ~]# yum makecache fast
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.163.com
* extras: mirrors.163.com
* updates: mirrors.163.com
base | 3.6 kB 00:00:00
docker-ce-stable | 3.5 kB 00:00:00
extras | 3.4 kB 00:00:00
updates | 3.4 kB 00:00:00
(1/2): docker-ce-stable/x86_64/updateinfo | 55 B 00:00:00
(2/2): docker-ce-stable/x86_64/primary_db | 25 kB 00:00:00
Metadata Cache Created
开始安装啦！
[root@localhost ~]# yum -y install docker-ce
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.163.com
* extras: mirrors.tuna.tsinghua.edu.cn
* updates: mirrors.shu.edu.cn
Resolving Dependencies
--> Running transaction check
---> Package docker-ce.x86_64 3:18.09.3-3.el7 will be installed
--> Processing Dependency: container-selinux >= 2.9 for package: 3:docker-ce-18.09.3-3.el7.x86_64
--> Processing Dependency: containerd.io >= 1.2.2-3 for package: 3:docker-ce-18.09.3-3.el7.x86_64
--> Processing Dependency: docker-ce-cli for package: 3:docker-ce-18.09.3-3.el7.x86_64
--> Processing Dependency: libcgroup for package: 3:docker-ce-18.09.3-3.el7.x86_64
--> Running transaction check
---> Package container-selinux.noarch 2:2.74-1.el7 will be installed
--> Processing Dependency: selinux-policy-targeted >= 3.13.1-216.el7 for package: 2:container-selinux-2.74-1.el7.noarch
--> Processing Dependency: selinux-policy-base >= 3.13.1-216.el7 for package: 2:container-selinux-2.74-1.el7.noarch
--> Processing Dependency: selinux-policy >= 3.13.1-216.el7 for package: 2:container-selinux-2.74-1.el7.noarch
--> Processing Dependency: policycoreutils-python for package: 2:container-selinux-2.74-1.el7.noarch
---> Package containerd.io.x86_64 0:1.2.4-3.1.el7 will be installed
---> Package docker-ce-cli.x86_64 1:18.09.3-3.el7 will be installed
---> Package libcgroup.x86_64 0:0.41-20.el7 will be installed
--> Running transaction check
---> Package policycoreutils-python.x86_64 0:2.5-29.el7_6.1 will be installed
--> Processing Dependency: policycoreutils = 2.5-29.el7_6.1 for package: policycoreutils-python-2.5-29.el7_6.1.x86_64
--> Processing Dependency: setools-libs >= 3.3.8-4 for package: policycoreutils-python-2.5-29.el7_6.1.x86_64
--> Processing Dependency: libsemanage-python >= 2.5-14 for package: policycoreutils-python-2.5-29.el7_6.1.x86_64
--> Processing Dependency: audit-libs-python >= 2.1.3-4 for package: policycoreutils-python-2.5-29.el7_6.1.x86_64
--> Processing Dependency: python-IPy for package: policycoreutils-python-2.5-29.el7_6.1.x86_64
--> Processing Dependency: libqpol.so.1(VERS_1.4)(64bit) for package: policycoreutils-python-2.5-29.el7_6.1.x86_64
--> Processing Dependency: libqpol.so.1(VERS_1.2)(64bit) for package: policycoreutils-python-2.5-29.el7_6.1.x86_64
--> Processing Dependency: libapol.so.4(VERS_4.0)(64bit) for package: policycoreutils-python-2.5-29.el7_6.1.x86_64
--> Processing Dependency: checkpolicy for package: policycoreutils-python-2.5-29.el7_6.1.x86_64
--> Processing Dependency: libqpol.so.1()(64bit) for package: policycoreutils-python-2.5-29.el7_6.1.x86_64
--> Processing Dependency: libapol.so.4()(64bit) for package: policycoreutils-python-2.5-29.el7_6.1.x86_64
---> Package selinux-policy.noarch 0:3.13.1-192.el7 will be updated
---> Package selinux-policy.noarch 0:3.13.1-229.el7_6.9 will be an update
--> Processing Dependency: libsemanage >= 2.5-13 for package: selinux-policy-3.13.1-229.el7_6.9.noarch
---> Package selinux-policy-targeted.noarch 0:3.13.1-192.el7 will be updated
---> Package selinux-policy-targeted.noarch 0:3.13.1-229.el7_6.9 will be an update
--> Running transaction check
---> Package audit-libs-python.x86_64 0:2.8.4-4.el7 will be installed
--> Processing Dependency: audit-libs(x86-64) = 2.8.4-4.el7 for package: audit-libs-python-2.8.4-4.el7.x86_64
---> Package checkpolicy.x86_64 0:2.5-8.el7 will be installed
---> Package libsemanage.x86_64 0:2.5-11.el7 will be updated
---> Package libsemanage.x86_64 0:2.5-14.el7 will be an update
--> Processing Dependency: libsepol >= 2.5-10 for package: libsemanage-2.5-14.el7.x86_64
--> Processing Dependency: libselinux >= 2.5-14 for package: libsemanage-2.5-14.el7.x86_64
---> Package libsemanage-python.x86_64 0:2.5-14.el7 will be installed
---> Package policycoreutils.x86_64 0:2.5-22.el7 will be updated
---> Package policycoreutils.x86_64 0:2.5-29.el7_6.1 will be an update
--> Processing Dependency: libselinux-utils >= 2.5-14 for package: policycoreutils-2.5-29.el7_6.1.x86_64
---> Package python-IPy.noarch 0:0.75-6.el7 will be installed
---> Package setools-libs.x86_64 0:3.3.8-4.el7 will be installed
--> Running transaction check
---> Package audit-libs.x86_64 0:2.8.1-3.el7 will be updated
--> Processing Dependency: audit-libs(x86-64) = 2.8.1-3.el7 for package: audit-2.8.1-3.el7.x86_64
---> Package audit-libs.x86_64 0:2.8.4-4.el7 will be an update
---> Package libselinux.x86_64 0:2.5-12.el7 will be updated
--> Processing Dependency: libselinux(x86-64) = 2.5-12.el7 for package: libselinux-python-2.5-12.el7.x86_64
---> Package libselinux.x86_64 0:2.5-14.1.el7 will be an update
---> Package libselinux-utils.x86_64 0:2.5-12.el7 will be updated
---> Package libselinux-utils.x86_64 0:2.5-14.1.el7 will be an update
---> Package libsepol.x86_64 0:2.5-8.1.el7 will be updated
---> Package libsepol.x86_64 0:2.5-10.el7 will be an update
--> Running transaction check
---> Package audit.x86_64 0:2.8.1-3.el7 will be updated
---> Package audit.x86_64 0:2.8.4-4.el7 will be an update
---> Package libselinux-python.x86_64 0:2.5-12.el7 will be updated
---> Package libselinux-python.x86_64 0:2.5-14.1.el7 will be an update
--> Finished Dependency Resolution
Dependencies Resolved
=============================================================================================================================================
Package Arch Version Repository Size
=============================================================================================================================================
Installing:
docker-ce x86_64 3:18.09.3-3.el7 docker-ce-stable 19 M
Installing for dependencies:
audit-libs-python x86_64 2.8.4-4.el7 base 76 k
checkpolicy x86_64 2.5-8.el7 base 295 k
container-selinux noarch 2:2.74-1.el7 extras 38 k
containerd.io x86_64 1.2.4-3.1.el7 docker-ce-stable 22 M
docker-ce-cli x86_64 1:18.09.3-3.el7 docker-ce-stable 14 M
libcgroup x86_64 0.41-20.el7 base 66 k
libsemanage-python x86_64 2.5-14.el7 base 113 k
policycoreutils-python x86_64 2.5-29.el7_6.1 updates 456 k
python-IPy noarch 0.75-6.el7 base 32 k
setools-libs x86_64 3.3.8-4.el7 base 620 k
Updating for dependencies:
audit x86_64 2.8.4-4.el7 base 250 k
audit-libs x86_64 2.8.4-4.el7 base 100 k
libselinux x86_64 2.5-14.1.el7 base 162 k
libselinux-python x86_64 2.5-14.1.el7 base 235 k
libselinux-utils x86_64 2.5-14.1.el7 base 151 k
libsemanage x86_64 2.5-14.el7 base 151 k
libsepol x86_64 2.5-10.el7 base 297 k
policycoreutils x86_64 2.5-29.el7_6.1 updates 916 k
selinux-policy noarch 3.13.1-229.el7_6.9 updates 483 k
selinux-policy-targeted noarch 3.13.1-229.el7_6.9 updates 6.9 M
Transaction Summary
=============================================================================================================================================
Install 1 Package (+10 Dependent packages)
Upgrade ( 10 Dependent packages)
Total download size: 66 M
Downloading packages:
Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
(1/21): audit-libs-2.8.4-4.el7.x86_64.rpm | 100 kB 00:00:00
(2/21): container-selinux-2.74-1.el7.noarch.rpm | 38 kB 00:00:00
(3/21): checkpolicy-2.5-8.el7.x86_64.rpm | 295 kB 00:00:00
(4/21): audit-2.8.4-4.el7.x86_64.rpm | 250 kB 00:00:01
(5/21): audit-libs-python-2.8.4-4.el7.x86_64.rpm | 76 kB 00:00:16
warning: /var/cache/yum/x86_64/7/docker-ce-stable/packages/docker-ce-18.09.3-3.el7.x86_64.rpm: Header V4 RSA/SHA512 Signature, key ID 621e9f35: NOKEY
Public key for docker-ce-18.09.3-3.el7.x86_64.rpm is not installed
(6/21): docker-ce-18.09.3-3.el7.x86_64.rpm | 19 MB 00:00:38
(7/21): libcgroup-0.41-20.el7.x86_64.rpm | 66 kB 00:00:00
(8/21): libselinux-2.5-14.1.el7.x86_64.rpm | 162 kB 00:00:01
(9/21): libselinux-utils-2.5-14.1.el7.x86_64.rpm | 151 kB 00:00:01
(10/21): libsemanage-python-2.5-14.el7.x86_64.rpm | 113 kB 00:00:00
(11/21): libsepol-2.5-10.el7.x86_64.rpm | 297 kB 00:00:00
(12/21): libsemanage-2.5-14.el7.x86_64.rpm | 151 kB 00:00:01
(13/21): containerd.io-1.2.4-3.1.el7.x86_64.rpm | 22 MB 00:00:47
(14/21): python-IPy-0.75-6.el7.noarch.rpm | 32 kB 00:00:00
(15/21): libselinux-python-2.5-14.1.el7.x86_64.rpm | 235 kB 00:00:17
(16/21): policycoreutils-python-2.5-29.el7_6.1.x86_64.rpm | 456 kB 00:00:15
(17/21): setools-libs-3.3.8-4.el7.x86_64.rpm | 620 kB 00:00:02
(18/21): policycoreutils-2.5-29.el7_6.1.x86_64.rpm | 916 kB 00:00:18
(19/21): docker-ce-cli-18.09.3-3.el7.x86_64.rpm | 14 MB 00:00:21
(20/21): selinux-policy-targeted-3.13.1-229.el7_6.9.noarch.rpm | 6.9 MB 00:00:10
selinux-policy-3.13.1-229.el7_ FAILED ===========================-] 1.0 kB/s | 66 MB 00:02:57 ETA
http://mirror.lzu.edu.cn/centos/7.6.1810/updates/x86_64/Packages/selinux-policy-3.13.1-229.el7_6.9.noarch.rpm: [Errno 12] Timeout on http://mirror.lzu.edu.cn/centos/7.6.1810/updates/x86_64/Packages/selinux-policy-3.13.1-229.el7_6.9.noarch.rpm: (28, 'Operation too slow. Less than 1000 bytes/sec transferred the last 30 seconds')
Trying other mirror.
(21/21): selinux-policy-3.13.1-229.el7_6.9.noarch.rpm | 483 kB 00:00:15
---------------------------------------------------------------------------------------------------------------------------------------------
Total 595 kB/s | 66 MB 00:01:53
Retrieving key from https://mirrors.aliyun.com/docker-ce/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://mirrors.aliyun.com/docker-ce/linux/centos/gpg
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Updating : libsepol-2.5-10.el7.x86_64 1/31
Updating : libselinux-2.5-14.1.el7.x86_64 2/31
Updating : audit-libs-2.8.4-4.el7.x86_64 3/31
Updating : libsemanage-2.5-14.el7.x86_64 4/31
Updating : libselinux-utils-2.5-14.1.el7.x86_64 5/31
Updating : policycoreutils-2.5-29.el7_6.1.x86_64 6/31
Updating : selinux-policy-3.13.1-229.el7_6.9.noarch 7/31
Installing : libcgroup-0.41-20.el7.x86_64 8/31
Updating : selinux-policy-targeted-3.13.1-229.el7_6.9.noarch 9/31
Installing : libsemanage-python-2.5-14.el7.x86_64 10/31
Installing : audit-libs-python-2.8.4-4.el7.x86_64 11/31
Installing : setools-libs-3.3.8-4.el7.x86_64 12/31
Updating : libselinux-python-2.5-14.1.el7.x86_64 13/31
Installing : containerd.io-1.2.4-3.1.el7.x86_64 14/31
Installing : 1:docker-ce-cli-18.09.3-3.el7.x86_64 15/31
Installing : python-IPy-0.75-6.el7.noarch 16/31
Installing : checkpolicy-2.5-8.el7.x86_64 17/31
Installing : policycoreutils-python-2.5-29.el7_6.1.x86_64 18/31
Installing : 2:container-selinux-2.74-1.el7.noarch 19/31
Installing : 3:docker-ce-18.09.3-3.el7.x86_64 20/31
Updating : audit-2.8.4-4.el7.x86_64 21/31
Cleanup : selinux-policy-targeted-3.13.1-192.el7.noarch 22/31
Cleanup : selinux-policy-3.13.1-192.el7.noarch 23/31
Cleanup : policycoreutils-2.5-22.el7.x86_64 24/31
Cleanup : libsemanage-2.5-11.el7.x86_64 25/31
Cleanup : libselinux-utils-2.5-12.el7.x86_64 26/31
Cleanup : libselinux-python-2.5-12.el7.x86_64 27/31
Cleanup : libselinux-2.5-12.el7.x86_64 28/31
Cleanup : audit-2.8.1-3.el7.x86_64 29/31
Cleanup : audit-libs-2.8.1-3.el7.x86_64 30/31
Cleanup : libsepol-2.5-8.1.el7.x86_64 31/31
Verifying : libcgroup-0.41-20.el7.x86_64 1/31
Verifying : 2:container-selinux-2.74-1.el7.noarch 2/31
Verifying : policycoreutils-2.5-29.el7_6.1.x86_64 3/31
Verifying : checkpolicy-2.5-8.el7.x86_64 4/31
Verifying : audit-libs-2.8.4-4.el7.x86_64 5/31
Verifying : audit-2.8.4-4.el7.x86_64 6/31
Verifying : python-IPy-0.75-6.el7.noarch 7/31
Verifying : setools-libs-3.3.8-4.el7.x86_64 8/31
Verifying : policycoreutils-python-2.5-29.el7_6.1.x86_64 9/31
Verifying : libsemanage-python-2.5-14.el7.x86_64 10/31
Verifying : selinux-policy-3.13.1-229.el7_6.9.noarch 11/31
Verifying : libsemanage-2.5-14.el7.x86_64 12/31
Verifying : selinux-policy-targeted-3.13.1-229.el7_6.9.noarch 13/31
Verifying : libsepol-2.5-10.el7.x86_64 14/31
Verifying : libselinux-python-2.5-14.1.el7.x86_64 15/31
Verifying : audit-libs-python-2.8.4-4.el7.x86_64 16/31
Verifying : libselinux-utils-2.5-14.1.el7.x86_64 17/31
Verifying : 1:docker-ce-cli-18.09.3-3.el7.x86_64 18/31
Verifying : libselinux-2.5-14.1.el7.x86_64 19/31
Verifying : 3:docker-ce-18.09.3-3.el7.x86_64 20/31
Verifying : containerd.io-1.2.4-3.1.el7.x86_64 21/31
Verifying : libsemanage-2.5-11.el7.x86_64 22/31
Verifying : libselinux-python-2.5-12.el7.x86_64 23/31
Verifying : audit-libs-2.8.1-3.el7.x86_64 24/31
Verifying : policycoreutils-2.5-22.el7.x86_64 25/31
Verifying : audit-2.8.1-3.el7.x86_64 26/31
Verifying : libsepol-2.5-8.1.el7.x86_64 27/31
Verifying : selinux-policy-3.13.1-192.el7.noarch 28/31
Verifying : libselinux-2.5-12.el7.x86_64 29/31
Verifying : libselinux-utils-2.5-12.el7.x86_64 30/31
Verifying : selinux-policy-targeted-3.13.1-192.el7.noarch 31/31
Installed:
docker-ce.x86_64 3:18.09.3-3.el7
Dependency Installed:
audit-libs-python.x86_64 0:2.8.4-4.el7 checkpolicy.x86_64 0:2.5-8.el7 container-selinux.noarch 2:2.74-1.el7
containerd.io.x86_64 0:1.2.4-3.1.el7 docker-ce-cli.x86_64 1:18.09.3-3.el7 libcgroup.x86_64 0:0.41-20.el7
libsemanage-python.x86_64 0:2.5-14.el7 policycoreutils-python.x86_64 0:2.5-29.el7_6.1 python-IPy.noarch 0:0.75-6.el7
setools-libs.x86_64 0:3.3.8-4.el7
Dependency Updated:
audit.x86_64 0:2.8.4-4.el7 audit-libs.x86_64 0:2.8.4-4.el7 libselinux.x86_64 0:2.5-14.1.el7
libselinux-python.x86_64 0:2.5-14.1.el7 libselinux-utils.x86_64 0:2.5-14.1.el7 libsemanage.x86_64 0:2.5-14.el7
libsepol.x86_64 0:2.5-10.el7 policycoreutils.x86_64 0:2.5-29.el7_6.1 selinux-policy.noarch 0:3.13.1-229.el7_6.9
selinux-policy-targeted.noarch 0:3.13.1-229.el7_6.9
Complete!
这样就安装好了。
可能有朋友会问，太麻烦有没有简单一点的安装步骤，一步到位的那种，不好意思，还真没有，这里有两步到位的！可以试试。说不定能成功。
4.脚本一键安装
在测试或开发环境中 Docker 官方为了简化安装流程，提供了一套便捷的安装脚本，CentOS 系统上可以使用这套脚本安装：
$ curl -fsSL get.docker.com -o get-docker.sh
$ sudo sh get-docker.sh --mirror Aliyun
执行这个命令后，脚本就会自动的将一切准备工作做好，并且把 Docker CE 的 Edge 版本安装在系统中。
--PS：我自己反正没成功，你们可以试试看。
5.启动 Docker CE
[root@localhost ~]# sudo systemctl enable docker
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@localhost ~]# sudo systemctl start docker
到这一步就安装好了！哎。小白不容易，需要努力啊！
6.查看下版本
[root@localhost ~]# docker version
Client:
Version: 18.09.3
API version: 1.39
Go version: go1.10.8
Git commit: 774a1f4
Built: Thu Feb 28 06:33:21 2019
OS/Arch: linux/amd64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 18.09.3
API version: 1.39 (minimum version 1.12)
Go version: go1.10.8
Git commit: 774a1f4
Built: Thu Feb 28 06:02:24 2019
OS/Arch: linux/amd64
Experimental: false
这个18版本还好不是很老的版本。
7.测试 Docker 是否安装正确
[root@localhost ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete
Digest: sha256:2557e3c07ed1e38f26e389462d03ed943586f744621577a99efb77324b0fe535
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.
(amd64)
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://hub.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/get-started/
若能正常输出以上信息，则说明安装成功。
谢谢。
