虚拟化及容器_课上实验

实验1

下载使用虚拟机

然后快照回溯到init

网络：

推荐改为NAT模式：

开机就好啦

实验1 安装和使用Docker

登录名：

root
openstack

步骤1、2 关闭防火墙和SELinux

systemctl stop firewalld
systemctl disable firewalld
systemctl status firewalld

# 关闭SELinux
setenforce 0
# i 进入输入模式，ESC+:wq 退出编辑模式
vi /etc/selinux/config

把SELINUX 改为：
SELINUX=disabled

步骤3 修改网卡配置信息

可能更简单方法

nmtui

改信息：

改成自动然后删掉IP

【俩ESC】
reboot

登录后输入

ip addr

这个就是IP地址啦

修改DNS

vi /etc/sysconfig/network-scripts/ifcfg-ens33

加入DNS1=114.114.114.114

重启下网络

测试与外网的连通性。

[root@node-a ~]# ping -c 4 www.sina.com.cn
PING ww1.sinaimg.cn.w.alikunlun.com (27.221.120.196) 56(84) bytes of data.
64 bytes from 27.221.120.196 (27.221.120.196): icmp_seq=1 ttl=128 time=1.07 ms
64 bytes from 27.221.120.196 (27.221.120.196): icmp_seq=2 ttl=128 time=0.348 ms
64 bytes from 27.221.120.196 (27.221.120.196): icmp_seq=3 ttl=128 time=0.553 ms
64 bytes from 27.221.120.196 (27.221.120.196): icmp_seq=4 ttl=128 time=0.449 ms

--- ww1.sinaimg.cn.w.alikunlun.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 4015ms
rtt min/avg/max/mdev = 0.348/0.606/1.074/0.279 ms
[root@node-a ~]#

SSH连接

在cmd里

ssh root@192.168.59.128 (这里是你的ip)

输入yes

4.更新yum仓库信息

yum -y update

5. 配置时间同步

yum –y install ntpdate
ntpdate ntp.aliyun.com

6 7 8. 安装docker

yum remove docker docker-common docker-selinux docker-engine
yum install -y yum-utils device-mapper-persistent-data lvm2

# 中科大镜像源
yum-config-manager --add-repo http://mirrors.ustc.edu.cn/docker-ce/linux/centos/docker-ce.repo

yum makecache fast

选择并且安装

yum list docker-ce --showduplicates | sort -r
``

安装

yum install –y docker-ce.x86_64 3:24.0.6-1.el7

![](https://cmd.dayi.ink/uploads/upload_a654c8e4ce819f4d5d481ee944fe23fb.png)

![](https://cmd.dayi.ink/uploads/upload_3dca66f686398038d50b9bf533f008c7.png)


### 11.开机自启、开机启动

systemctl start docker
systemctl enable docker

![](https://cmd.dayi.ink/uploads/upload_374bc6ff87835c737c063161c599b027.png)

### 12. 查看docker进程

ps -ef | grep docker
docker version

![](https://cmd.dayi.ink/uploads/upload_5b36fbc33e369422a852b053eedab946.png)

[root@node-a ~]# ps -ef | grep docker
root 2024 1 0 15:29 ? 00:00:00 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
root 2171 1452 0 15:30 pts/0 00:00:00 grep --color=auto docker
[root@node-a ~]# docker version
Client: Docker Engine - Community
Version: 24.0.6
API version: 1.43
Go version: go1.20.7
Git commit: ed223bc
Built: Mon Sep 4 12:35:25 2023
OS/Arch: linux/amd64
Context: default

Server: Docker Engine - Community
Engine:
Version: 24.0.6
API version: 1.43 (minimum version 1.12)
Go version: go1.20.7
Git commit: 1a79695
Built: Mon Sep 4 12:34:28 2023
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.6.24
GitCommit: 61f9fd88f79f081d64d6fa3bb1a0dc71ec870523
runc:
Version: 1.1.9
GitCommit: v1.1.9-0-gccaecfc
docker-init:
Version: 0.19.0
GitCommit: de40ad0
[root@node-a ~]#

### 12.镜像加速器

vi /etc/docker/daemon.json

i 输入
ESC -> :wq 保存

{
"registry-mirrors": ["https://x3n9jrcg.mirror.aliyuncs.com"]
}

![](https://cmd.dayi.ink/uploads/upload_83185599d7289864d5da05dc792fe0bb.png)


### 13. 重启docker

[root@node-a ~]# systemctl daemon-reload
[root@node-a ~]#
[root@node-a ~]# systemctl restart docker
[root@node-a ~]#

![](https://cmd.dayi.ink/uploads/upload_6c5bc74d6a968102224245487a28d5d8.png)


### 14. 下载镜像以便于测试

docker run -dit -p 80:80 nginx:latest

![](https://cmd.dayi.ink/uploads/upload_5a55d20f185bce2cb0d635832eb351f5.png)

打开网页测试：
![](https://cmd.dayi.ink/uploads/upload_d487078c811d28840d7c12c5a7a53ac6.png)