centOs7 安装 docker

矫情吗；* 2022-04-23 03:32 186阅读 0赞

1.查看你的centos内核版本

Docker 要求 CentOS 系统的内核版本高于 3.10 ，查看本页面的前提条件来验证你的CentOS 版本是否支持 Docker 。

通过 uname -r 命令查看你当前的内核版本

  1. [root@default docker]# uname -r
  2. 3.10.0-957.1.3.el7.x86_64

2.安装Docker

  1. [root@localhost ~]# yum remove docker \
  2.                   docker-client \
  3.                   docker-client-latest \
  4.                   docker-common \
  5.                   docker-latest \
  6.                   docker-latest-logrotate \
  7.                   docker-logrotate \
  8.                   docker-selinux \
  9.                   docker-engine-selinux \
  10.                   docker-engine

首先移除你的centOs上的老版本Docker，没安装过的话可以不进行这步操作。

安装docker需要的系统工具

  1. [root@localhost ~]# sudo yum install -y yum-utils device-mapper-persistent-data lvm2

添加软件源信息(未添加用aliyun centos linux自带了)：

  1. [root@localhost ~]# sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

更新 yum 缓存 ：

  1. [root@localhost ~]# sudo yum makecache fast

配置官方yum源，启用稳定版源配置：

  1. echo '[docker-ce-stable]
  2. name=Docker CE Stable - $basearch
  3. baseurl=https://download.docker.com/linux/centos/7/$basearch/stable
  4. enabled=1
  5. gpgcheck=1
  6. gpgkey=https://download.docker.com/linux/centos/gpg
  8. [docker-ce-stable-debuginfo]
  9. name=Docker CE Stable - Debuginfo $basearch
  10. baseurl=https://download.docker.com/linux/centos/7/debug-$basearch/stable
  11. enabled=0
  12. gpgcheck=1
  13. gpgkey=https://download.docker.com/linux/centos/gpg
  15. [docker-ce-stable-source]
  16. name=Docker CE Stable - Sources
  17. baseurl=https://download.docker.com/linux/centos/7/source/stable
  18. enabled=0
  19. gpgcheck=1
  20. gpgkey=https://download.docker.com/linux/centos/gpg
  22. [docker-ce-edge]
  23. name=Docker CE Edge - $basearch
  24. baseurl=https://download.docker.com/linux/centos/7/$basearch/edge
  25. enabled=0
  26. gpgcheck=1
  27. gpgkey=https://download.docker.com/linux/centos/gpg
  29. [docker-ce-edge-debuginfo]
  30. name=Docker CE Edge - Debuginfo $basearch
  31. baseurl=https://download.docker.com/linux/centos/7/debug-$basearch/edge
  32. enabled=0
  33. gpgcheck=1
  34. gpgkey=https://download.docker.com/linux/centos/gpg
  36. [docker-ce-edge-source]
  37. name=Docker CE Edge - Sources
  38. baseurl=https://download.docker.com/linux/centos/7/source/edge
  39. enabled=0
  40. gpgcheck=1
  41. gpgkey=https://download.docker.com/linux/centos/gpg
  43. [docker-ce-test]
  44. name=Docker CE Test - $basearch
  45. baseurl=https://download.docker.com/linux/centos/7/$basearch/test
  46. enabled=0
  47. gpgcheck=1
  48. gpgkey=https://download.docker.com/linux/centos/gpg
  50. [docker-ce-test-debuginfo]
  51. name=Docker CE Test - Debuginfo $basearch
  52. baseurl=https://download.docker.com/linux/centos/7/debug-$basearch/test
  53. enabled=0
  54. gpgcheck=1
  55. gpgkey=https://download.docker.com/linux/centos/gpg
  57. [docker-ce-test-source]
  58. name=Docker CE Test - Sources
  59. baseurl=https://download.docker.com/linux/centos/7/source/test
  60. enabled=0
  61. gpgcheck=1
  62. gpgkey=https://download.docker.com/linux/centos/gpg
  64. [docker-ce-nightly]
  65. name=Docker CE Nightly - $basearch
  66. baseurl=https://download.docker.com/linux/centos/7/$basearch/nightly
  67. enabled=0
  68. gpgcheck=1
  69. gpgkey=https://download.docker.com/linux/centos/gpg
  71. [docker-ce-nightly-debuginfo]
  72. name=Docker CE Nightly - Debuginfo $basearch
  73. baseurl=https://download.docker.com/linux/centos/7/debug-$basearch/nightly
  74. enabled=0
  75. gpgcheck=1
  76. gpgkey=https://download.docker.com/linux/centos/gpg
  78. [docker-ce-nightly-source]
  79. name=Docker CE Nightly - Sources
  80. baseurl=https://download.docker.com/linux/centos/7/source/nightly
  81. enabled=0
  82. gpgcheck=1
  83. gpgkey=https://download.docker.com/linux/centos/gpg'>/etc/yum.repos.d/docker-ce.repo

查看可用的docker-ce版本：

  1. [root@localhost ~]# yum list docker-ce --showduplicates|grep "^doc"|sort -r
  3. docker-ce.x86_64            3:18.09.0-3.el7                     docker-ce-stable
  4. docker-ce.x86_64            18.06.1.ce-3.el7                    docker-ce-stable
  5. docker-ce.x86_64            18.06.0.ce-3.el7                    docker-ce-stable
  6. docker-ce.x86_64            18.03.1.ce-1.el7.centos             docker-ce-stable
  7. docker-ce.x86_64            18.03.0.ce-1.el7.centos             docker-ce-stable
  8. docker-ce.x86_64            17.12.1.ce-1.el7.centos             docker-ce-stable
  9. docker-ce.x86_64            17.12.0.ce-1.el7.centos             docker-ce-stable
  10. docker-ce.x86_64            17.09.1.ce-1.el7.centos             docker-ce-stable
  11. docker-ce.x86_64            17.09.0.ce-1.el7.centos             docker-ce-stable
  12. docker-ce.x86_64            17.06.2.ce-1.el7.centos             docker-ce-stable
  13. docker-ce.x86_64            17.06.1.ce-1.el7.centos             docker-ce-stable
  14. docker-ce.x86_64            17.06.0.ce-1.el7.centos             docker-ce-stable
  15. docker-ce.x86_64            17.03.3.ce-1.el7                    docker-ce-stable
  16. docker-ce.x86_64            17.03.2.ce-1.el7.centos             docker-ce-stable
  17. docker-ce.x86_64            17.03.1.ce-1.el7.centos             docker-ce-stable
  18. docker-ce.x86_64            17.03.0.ce-1.el7.centos             docker-ce-stable

安装 Docker-ce：

  1. [root@localhost ~]# sudo yum -y install docker-ce-18.06.1.ce-3.el7
  2. [root@localhost ~]# docker version
  3. Client:
  4.  Version:           18.06.1-ce
  5.  API version:       1.38
  6.  Go version:        go1.10.3
  7.  Git commit:        e68fc7a
  8.  Built:             Tue Aug 21 17:23:03 2018
  9.  OS/Arch:           linux/amd64
  10.  Experimental:      false
  12. Server:
  13.  Engine:
  14.   Version:          18.06.1-ce
  15.   API version:      1.38 (minimum version 1.12)
  16.   Go version:       go1.10.3
  17.   Git commit:       e68fc7a
  18.   Built:            Tue Aug 21 17:25:29 2018
  19.   OS/Arch:          linux/amd64
  20.   Experimental:     false

docker 常用的几个命令：

查看docker服务状态、启动docker服务、停止docker服务、重启docker服务

  1. systemctl status docker
  2. systemctl start docker
  3. systemctl stop docker
  4. systemctl restart docker

设置为linux开机启动

  1. [root@localhost ~]# systemctl enable docker
  2. Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.

hello-world测试一下docker

  1. [root@default docker]# docker run hello-world
  3. Hello from Docker!
  4. This message shows that your installation appears to be working correctly.
  6. To generate this message, Docker took the following steps:
  7.  1. The Docker client contacted the Docker daemon.
  8.  2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
  9.     (amd64)
  10.  3. The Docker daemon created a new container from that image which runs the
  11.     executable that produces the output you are currently reading.
  12.  4. The Docker daemon streamed that output to the Docker client, which sent it
  13.     to your terminal.
  15. To try something more ambitious, you can run an Ubuntu container with:
  16.  $ docker run -it ubuntu bash
  18. Share images, automate workflows, and more with a free Docker ID:
  19.  https://hub.docker.com/
  21. For more examples and ideas, visit:
  22.  https://docs.docker.com/get-started/

第一次run hello-world的时候，因为本地没有hello-world镜像，docker引擎会自己去docker hub搜索hello-world，拉取，并运行

用docker search hello-world查看一下远端镜像库中的hello-world镜像，结果如下：

  1. [root@default docker]# docker search hello-world
  3. NAME                                       DESCRIPTION                                     STARS               OFFICIAL            AUTOMATED
  4. hello-world                                Hello World! (an example of minimal Dockeriz…   804                 [OK]                
  5. kitematic/hello-world-nginx                A light-weight nginx container that demonstr…   119                                     
  6. tutum/hello-world                          Image to test docker deployments. Has Apache…   59                                      [OK]
  7. dockercloud/hello-world                    Hello World!                                    14                                      [OK]
  8. hypriot/armhf-hello-world                  Hello World! (an example of minimal Dockeriz…   6                                       
  9. crccheck/hello-world                       Hello World web server in under 2.5 MB          6                                       [OK]
  10. armhf/hello-world                          Hello World! (an example of minimal Dockeriz…   5                                       
  11. marcells/aspnet-hello-world                ASP.NET vNext - Hello World                     5                                       [OK]
  12. kornkitti/express-hello-world              Node.js Express Hello World : https://github…   3                                       
  13. bonomat/nodejs-hello-world                 a simple nodejs hello world container           3                                       [OK]
  14. ppc64le/hello-world                        Hello World! (an example of minimal Dockeriz…   2                                       
  15. hello-seattle                              Hello from DockerCon 2016 (Seattle)!            2                   [OK]                
  16. arm32v7/hello-world                        Hello World! (an example of minimal Dockeriz…   1                                       
  17. microsoft/mcr-hello-world                  Hello World! (an example of minimal Dockeriz…   1                                       
  18. carinamarina/hello-world-app               This is a sample Python web application, run…   1                                       [OK]
  19. ansibleplaybookbundle/hello-world-apb      An APB which deploys a sample Hello World! a…   0                                       [OK]
  20. ansibleplaybookbundle/hello-world-db-apb   An APB which deploys a sample Hello World! a…   0                                       [OK]
  21. mcrflowtest/mcr-hello-world                Hello World! (an example of minimal Dockeriz…   0                                       
  22. gscrivano/hello-world                      hello world example system container            0                                       [OK]
  23. s390x/hello-world                          Hello World! (an example of minimal Dockeriz…   0                                       
  24. markmnei/hello-world-java                  Automated build of Hello World Java             0                                       [OK]
  25. burdz/hello-world-k8s                      To provide a simple webserver that can have …   0                                       [OK]
  26. kevindockercompany/hello-world                                                             0                                       
  27. infrastructureascode/hello-world           A tiny "Hello World" web server with a healt…   0                                       [OK]
  28. winamd64/hello-world                       Hello World! (an example of minimal Dockeriz…   0

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