kvm部署

kvm部署 kvm部署

环境：

主机IPweb（centos7）192.168.72.128kvm1（centos8）192.168.72.139kvm2(redhat8)192.168.72.138

//关闭防火墙
[root@kvm ~]# systemctl stop firewalld
[root@kvm ~]# vim /etc/selinux/config 
[root@kvm ~]# setenforce 0
setenforce: SELinux is disabled

//配置桥接网络
[root@kvm ~]# nmcli connection add type bridge con-name br0 ifname br0 ipv4.addresses 192.168.72.131/24 ipv4.gateway 192.168.72.2 ipv4.dns 192.168.72.2 ipv4.method manual connection.autoconnect yes
连接 "br0" (dfa267d3-2db5-4747-bb99-b089dcd4c1b1) 已成功添加。
[root@kvm ~]# nmcli connection modify ens160 slave-type bridge master br0 connection.autoconnect yes
[root@kvm ~]# systemctl restart NetworkManager
[root@kvm ~]# nmcli connection down ens160;nmcli connection up ens160
[root@kvm ~]# ip a
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens160:  mtu 1500 qdisc mq master br0 state UP group default qlen 1000
    link/ether 00:0c:29:2e:a5:d7 brd ff:ff:ff:ff:ff:ff
3: br0:  mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:0c:29:2e:a5:d7 brd ff:ff:ff:ff:ff:ff
    inet 192.168.72.138/24 brd 192.168.72.255 scope global noprefixroute br0
       valid_lft forever preferred_lft forever
    inet6 fe80::9ee9:87f6:6685:9252/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
[root@kvm ~]# 


//下载依赖包
[root@kvm ~]# yum -y install epel-release vim wget net-tools unzip zip gcc gcc-c++

//验证CPU是否支持KVM；如果结果中有vmx（Intel）或svm(AMD)字样，就说明CPU的支持的
[root@kvm ~]# egrep -o 'vmx|svm' /proc/cpuinfo
vmx
vmx
vmx
vmx

//kvm安装
[root@kvm yum.repos.d]# yum -y install qemu-kvm qemu-kvm-common qemu-img virt-manager libvirt python3-libvirt libvirt-client virt-install virt-viewer libguestfs-tools



//验证安装结果
[root@kvm ~]# lsmod|grep kvm
kvm_intel             294912  0
kvm                   786432  1 kvm_intel
irqbypass              16384  1 kvm
[root@kvm ~]# 

//测试并验证安装结果
[root@kvm ~]# virsh -c qemu:///system list
 Id    名称                         状态
----------------------------------------------------


[root@kvm ~]# virsh --version
4.5.0
[root@kvm ~]# virt-install --version
2.2.1
[root@kvm ~]# ln -s /usr/libexec/qemu-kvm /usr/bin/qemu-kvm
[root@kvm ~]# ll /usr/bin/qemu-kvm
lrwxrwxrwx. 1 root root 21 10月 20 01:04 /usr/bin/qemu-kvm -> /usr/libexec/qemu-kvm
[root@kvm ~]# lsmod |grep kvm
kvm_intel             294912  0
kvm                   786432  1 kvm_intel
irqbypass  

//查看网桥信息
[root@kvm ~]# brctl show
bridge name     bridge id               STP enabled  interfaces
br0             8000.000c292ea5d7       yes ens160
virbr0          8000.525400618543       yes virbr0-nic

kvm web管理界面安装

[root@kvm ~]# yum -y install git python3-pip python3-libvirt python3-libxml2 python3-websocket-client supervisor nginx python36-devel

//从github上下载webvirtmgr代码
[root@kvm ~]# cd /usr/local/src/
[root@kvm src]# git clone git://github.com/retspen/webvirtmgr.git
正克隆到 'webvirtmgr'...

//安装webvirtmgr
[root@kvm src]# cd webvirtmgr/
[root@kvm webvirtmgr]# pip2 install -r requirements.txt

//检查sqlite3是否安装
[root@kvm webvirtmgr]# ln -s /usr/bin/python2 /usr/bin/python
[root@kvm webvirtmgr]# env python
Python 2.7.18 (default, Jan 29 2021, 18:19:04) 
[GCC 8.4.1 20200928 (Red Hat 8.4.1-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()
[root@kvm webvirtmgr]#

//初始化帐号信息
[root@kvm webvirtmgr]# ./manage.py syncdb
WARNING:root:No local_settings file found.
Creating tables ...
Creating table auth_permission
Creating table auth_group_permissions
Creating table auth_group
Creating table auth_user_groups
Creating table auth_user_user_permissions
Creating table auth_user
Creating table django_content_type
Creating table django_session
Creating table django_site
Creating table servers_compute
Creating table instance_instance
Creating table create_flavor

You just installed Django's auth system, which means you don't have any superusers defined.
Would you like to create one now? (yes/no): yes
Username (leave blank to use 'root'): 
Email address: 1@2.com
Password: 
Password (again): 
Superuser created successfully.
Installing custom SQL ...
Installing indexes ...
Installed 6 object(s) from 1 fixture(s)
[root@kvm webvirtmgr]# 

//拷贝web网页至指定目录
[root@kvm ~]# mkdir /var/www
[root@kvm ~]# cp -r /usr/local/src/webvirtmgr /var/www/
[root@kvm ~]# chown -R nginx.nginx /var/www/webvirtmgr/
[root@kvm ~]# 


//生成密钥
[root@kvm ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
Created directory '/root/.ssh'.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:ObOqqW0Oc6gNxwOELvzqShREcKFvCPyj2ETzCBG0C6E root@kvm
The key's randomart image is:
+---[RSA 3072]----+
|O=o.             |
|==.              |
|E=o              |
|*=++     .       |
|+==o.   S        |
|+*o..    +       |
|ooO..   .        |
|.=.*.. .         |
|=oo+=..          |
+----[SHA256]-----+
[root@kvm ~]# ssh-copy-id 192.168.72.138
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
The authenticity of host '192.168.72.138 (192.168.72.138)' can't be established.
ECDSA key fingerprint is SHA256:EczzC1cmnInKnDJezHx/wuaazyzEdTIrbIIDkqOkqLc.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@192.168.72.138's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh '192.168.72.138'"
and check to make sure that only the key(s) you wanted were added.

[root@kvm ~]# ss -antl
State   Recv-Q  Send-Q   Local Address:Port                Peer Address:Port              
LISTEN  0       32       192.168.122.1:53                       0.0.0.0:*                 
LISTEN  0       128            0.0.0.0:22                       0.0.0.0:*                 
LISTEN  0       128            0.0.0.0:111                      0.0.0.0:*                 
LISTEN  0       128               [::]:22                          [::]:*                 
LISTEN  0       128               [::]:111                         [::]:*                 
[root@kvm ~]# 

//配置端口转发
[root@kvm ~]# ssh 192.168.72.138 -L localhost:8000:localhost:8000 -L localhost:6080:localhost:60
Last login: Wed Oct 20 02:13:24 2021 from 192.168.72.1
[root@kvm ~]# ss -antl
State   Recv-Q  Send-Q   Local Address:Port                Peer Address:Port              
LISTEN  0       32       192.168.122.1:53                       0.0.0.0:*                 
LISTEN  0       128            0.0.0.0:22                       0.0.0.0:*                 
LISTEN  0       128          127.0.0.1:6080                     0.0.0.0:*                 
LISTEN  0       128          127.0.0.1:8000                     0.0.0.0:*                 
LISTEN  0       128            0.0.0.0:111                      0.0.0.0:*                 
LISTEN  0       128               [::]:22                          [::]:*                 
LISTEN  0       128              [::1]:6080                        [::]:*                 
LISTEN  0       128              [::1]:8000                        [::]:*                 
LISTEN  0       128               [::]:111                         [::]:*                 
[root@kvm ~]# 

//配置nginx
[root@kvm ~]# vim /etc/nginx/nginx.conf
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

include /usr/share/nginx/modules/*.conf;

events {
    worker_connections 1024;
}

http {
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

    include /etc/nginx/conf.d/*.conf;

    server {
        listen       80;
        server_name  localhost;

        include /etc/nginx/default.d/*.conf;

        location / {
            root html;
            index index.html index.htm;
        }

        error_page 404 /404.html;
            location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }
}

[root@kvm ~]# vim /etc/nginx/conf.d/webvirtmgr.conf
server {
    listen 80 default_server;

    server_name $hostname;
    #access_log /var/log/nginx/webvirtmgr_access_log;

    location /static/ {
        root /var/www/webvirtmgr/webvirtmgr;
        expires max;
    }

    location / {
        proxy_pass http://127.0.0.1:8000;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-for $proxy_add_x_forwarded_for;
        proxy_set_header Host $host:$server_port;
        proxy_set_header X-Forwarded-Proto $remote_addr;
        proxy_connect_timeout 600;
        proxy_read_timeout 600;
        proxy_send_timeout 600;
        client_max_body_size 1024M;
    }
}

//确保bind绑定的是本机的8000端口
[root@kvm ~]# vim /var/www/webvirtmgr/conf/gunicorn.conf.py
.....此处省略N行
bind = '0.0.0.0:8000'     //确保此处绑定的是本机的8000端口，这个在nginx配置中定义了，被代理的端口
backlog = 2048

//重启nginx
[root@kvm ~]# systemctl restart nginx
[root@kvm ~]# ss -antl
State   Recv-Q  Send-Q   Local Address:Port                Peer Address:Port              
LISTEN  0       32       192.168.122.1:53                       0.0.0.0:*                 
LISTEN  0       128            0.0.0.0:22                       0.0.0.0:*                 
LISTEN  0       128          127.0.0.1:6080                     0.0.0.0:*                 
LISTEN  0       128          127.0.0.1:8000                     0.0.0.0:*                 
LISTEN  0       128            0.0.0.0:111                      0.0.0.0:*                 
LISTEN  0       128            0.0.0.0:80                       0.0.0.0:*                 
LISTEN  0       128               [::]:22                          [::]:*                 
LISTEN  0       128              [::1]:6080                        [::]:*                 
LISTEN  0       128              [::1]:8000                        [::]:*                 
LISTEN  0       128               [::]:111                         [::]:*                 
[root@kvm ~]# 


//设置supervisor
[root@kvm ~]# vim /etc/supervisord.conf
.....此处省略上面的内容，在文件最后加上以下内容
[program:webvirtmgr]
command=/usr/bin/python2 /var/www/webvirtmgr/manage.py run_gunicorn -c /var/www/webvirtmgr/conf/gunicorn.conf.py
directory=/var/www/webvirtmgr
autostart=true
autorestart=true
logfile=/var/log/supervisor/webvirtmgr.log
log_stderr=true
user=nginx

[program:webvirtmgr-console]
command=/usr/bin/python2 /var/www/webvirtmgr/console/webvirtmgr-console
directory=/var/www/webvirtmgr
autostart=true
autorestart=true
stdout_logfile=/var/log/supervisor/webvirtmgr-console.log
redirect_stderr=true
user=nginx

//启动supervisor并设置开机自启
[root@kvm ~]# systemctl start supervisord
[root@kvm ~]# systemctl enable supervisord
Created symlink /etc/systemd/system/multi-user.target.wants/supervisord.service → /usr/lib/systemd/system/supervisord.service.
[root@kvm ~]# systemctl status supervisord
● supervisord.service - Process Monitoring a>
   Loaded: loaded (/usr/lib/systemd/system/s>
   Active: active (running) since Wed 2021-1>
 Main PID: 170059 (supervisord)
    Tasks: 2 (limit: 23789)
   Memory: 39.5M
   CGroup: /system.slice/supervisord.service
           ├─170059 /usr/bin/python3.6 /usr/>
           └─170300 /usr/bin/python2 /var/ww>

10月 20 02:32:05 kvm systemd[1]: Starting Pr>
10月 20 02:32:05 kvm systemd[1]: Started Pro>

[root@kvm ~]# ss -antl
State   Recv-Q  Send-Q   Local Address:Port                Peer Address:Port              
LISTEN  0       32       192.168.122.1:53                       0.0.0.0:*                 
LISTEN  0       128            0.0.0.0:22                       0.0.0.0:*                 
LISTEN  0       128          127.0.0.1:6080                     0.0.0.0:*                 
LISTEN  0       128          127.0.0.1:8000                     0.0.0.0:*                 
LISTEN  0       128            0.0.0.0:111                      0.0.0.0:*                 
LISTEN  0       128            0.0.0.0:80                       0.0.0.0:*                 
LISTEN  0       128               [::]:22                          [::]:*                 
LISTEN  0       128              [::1]:6080                        [::]:*                 
LISTEN  0       128              [::1]:8000                        [::]:*                 
LISTEN  0       128               [::]:111                         [::]:*                 
[root@kvm ~]# 


//配置nginx用户
[root@kvm ~]# su - nginx
上一次登录：三 10月 20 02:34:23 EDT 2021pts/0 上
This account is currently not available.
[root@kvm ~]# su - nginx -s /bin/bash
上一次登录：三 10月 20 02:34:53 EDT 2021pts/0 上
[nginx@kvm ~]$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/var/lib/nginx/.ssh/id_rsa): 
Created directory '/var/lib/nginx/.ssh'.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /var/lib/nginx/.ssh/id_rsa.
Your public key has been saved in /var/lib/nginx/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:LJHgpsLYYaKk55g15GzqggH9zHo0GtMNtlYJwgsN7tg nginx@kvm
The key's randomart image is:
+---[RSA 3072]----+
|.+  .            |
|o +... .         |
|.=+oo.o.         |
|XOo+o oo         |
|BoE* =. S        |
|.Xo.X ..         |
|=..B .           |
|+ o .            |
|.. .             |
+----[SHA256]-----+
[nginx@kvm ~]$ touch ~/.ssh/config && echo -e "StrictHostKeyChecking=nonUserKnownHostsFile=/dev/null" >> ~/.ssh/config
[nginx@kvm ~]$ chmod 0600 ~/.ssh/config
[nginx@kvm ~]$ ssh-copy-id root@192.168.72.138
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/var/lib/nginx/.ssh/id_rsa.pub"
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
Warning: Permanently added '192.168.72.138' (ECDSA) to the list of known hosts.
root@192.168.72.138's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'root@192.168.72.138'"
and check to make sure that only the key(s) you wanted were added.

[nginx@kvm ~]$ 


[root@kvm ~]# vim /etc/polkit-1/localauthority/50-local.d/50-libvirt-remote-access.pkla
[Remote libvirt SSH access]
Identity=unix-user:root
Action=org.libvirt.unix.manage
ResultAny=yes
ResultInactive=yes
ResultActive=yes
[root@kvm ~]# vim /etc/polkit-1/localauthority/50-local.d/50-libvirt-remote-access.pkla
[root@kvm ~]# chown -R root.root /etc/polkit-1/localauthority/50-local.d/50-libvirt-remote-access.pkla
[root@kvm ~]# systemctl restart nginx
[root@kvm ~]# systemctl restart libvirtd
[root@kvm ~]# 

访问

[root@kvm ~]# cd /var/lib/libvirt/images/
[root@kvm images]# ls
CentOS-7-x86_64-DVD-1804-7.5.iso
[root@kvm images]# 

添加第二台主机

[root@web ~]# hostnamectl set-hostname kvm2
[root@web ~]# bash
[root@kvm2 ~]# cd /etc/yum.repos.d/
[root@kvm2 yum.repos.d]# ls
epel-modular.repo     epel.repo                  epel-testing.repo  xx.repo
epel-playground.repo  epel-testing-modular.repo  redhat.repo
[root@kvm2 yum.repos.d]# mount /dev/cdrom /mnt/
mount: /mnt: WARNING: device write-protected, mounted read-only.
[root@kvm2 yum.repos.d]# cd
[root@kvm2 ~]# cd /etc/sysconfig/network-scripts/
[root@kvm2 network-scripts]# ls
ifcfg-ens160
[root@kvm2 network-scripts]# cp ifcfg-ens160 ifcfg-br0
[root@kvm2 network-scripts]# vim ifcfg-br0 
[root@kvm2 network-scripts]# vi ifcfg-br0 
[root@kvm2 network-scripts]# vi ifcfg-ens160 
[root@kvm2 network-scripts]# yum -y install qemu-kvm qemu-kvm-tools qemu-img virt-manager libvirt libvirt-python libvirt-client virt-install virt-viewer bridge-utils libguestfs-tools
Updating Subscription Management repositories.
Unable to read consumer identity
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
上次元数据过期检查：17:10:42 前，执行于 2021年10月20日 星期三 04时25分09秒。
软件包 qemu-kvm-15:2.12.0-99.module+el8.2.0+5827+8c39933c.x86_64 已安装。
No match for argument: qemu-kvm-tools
软件包 qemu-img-15:2.12.0-99.module+el8.2.0+5827+8c39933c.x86_64 已安装。
软件包 virt-manager-2.2.1-3.el8.noarch 已安装。
软件包 libvirt-4.5.0-42.module+el8.2.0+6024+15a2423f.x86_64 已安装。
No match for argument: libvirt-python
软件包 libvirt-client-4.5.0-42.module+el8.2.0+6024+15a2423f.x86_64 已安装。
软件包 virt-install-2.2.1-3.el8.noarch 已安装。
软件包 virt-viewer-7.0-9.el8.x86_64 已安装。
软件包 libguestfs-tools-1:1.38.4-15.module+el8.2.0+5297+222a20af.noarch 已安装。
错误：没有任何匹配: qemu-kvm-tools libvirt-python
[root@kvm2 network-scripts]# yum -y install qemu-kvm qemu-kvm-common qemu-img virt-manager libvirt python3-libvirt libvirt-client virt-install virt-viewer bridge-utils libguestfs-tools
Updating Subscription Management repositories.
Unable to read consumer identity
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
上次元数据过期检查：17:11:26 前，执行于 2021年10月20日 星期三 04时25分09秒。
软件包 qemu-kvm-15:2.12.0-99.module+el8.2.0+5827+8c39933c.x86_64 已安装。
软件包 qemu-kvm-common-15:2.12.0-99.module+el8.2.0+5827+8c39933c.x86_64 已安装。
软件包 qemu-img-15:2.12.0-99.module+el8.2.0+5827+8c39933c.x86_64 已安装。
软件包 virt-manager-2.2.1-3.el8.noarch 已安装。
软件包 libvirt-4.5.0-42.module+el8.2.0+6024+15a2423f.x86_64 已安装。
软件包 python3-libvirt-4.5.0-2.module+el8.1.0+4066+0f1aadab.x86_64 已安装。
软件包 libvirt-client-4.5.0-42.module+el8.2.0+6024+15a2423f.x86_64 已安装。
软件包 virt-install-2.2.1-3.el8.noarch 已安装。
软件包 virt-viewer-7.0-9.el8.x86_64 已安装。
软件包 libguestfs-tools-1:1.38.4-15.module+el8.2.0+5297+222a20af.noarch 已安装。
依赖关系解决。
=========================================================================================================
 软件包                      架构                  版本                        仓库                 大小
=========================================================================================================
安装:
 bridge-utils                x86_64                1.7.1-2.el8                 epel                 40 k

事务概要
=========================================================================================================
安装  1 软件包

总下载：40 k
安装大小：61 k
下载软件包：
bridge-utils-1.7.1-2.el8.x86_64.rpm                                      126 kB/s |  40 kB     00:00    
---------------------------------------------------------------------------------------------------------
总计                                                                     7.5 kB/s |  40 kB     00:05     
运行事务检查
事务检查成功。
运行事务测试
事务测试成功。
运行事务
  准备中  :                                                                                          1/1 
  安装    : bridge-utils-1.7.1-2.el8.x86_64                                                          1/1 
  运行脚本: bridge-utils-1.7.1-2.el8.x86_64                                                          1/1 
  验证    : bridge-utils-1.7.1-2.el8.x86_64                                                          1/1 
Installed products updated.

已安装:
  bridge-utils-1.7.1-2.el8.x86_64                                                                        

完毕！
[root@kvm2 network-scripts]# yum -y install vim wget net-tools unzip zip gcc gcc-c++
Updating Subscription Management repositories.
Unable to read consumer identity
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
上次元数据过期检查：17:11:55 前，执行于 2021年10月20日 星期三 04时25分09秒。
软件包 vim-enhanced-2:8.0.1763-13.el8.x86_64 已安装。
软件包 wget-1.19.5-8.el8_1.1.x86_64 已安装。
软件包 net-tools-2.0-0.51.20160912git.el8.x86_64 已安装。
软件包 unzip-6.0-43.el8.x86_64 已安装。
软件包 zip-3.0-23.el8.x86_64 已安装。
软件包 gcc-8.3.1-5.el8.x86_64 已安装。
软件包 gcc-c++-8.3.1-5.el8.x86_64 已安装。
依赖关系解决。
无需任何处理。
完毕！
[root@kvm2 network-scripts]# ip a
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens160:  mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:0c:29:2e:a5:d7 brd ff:ff:ff:ff:ff:ff
    inet 192.168.72.138/24 brd 192.168.72.255 scope global dynamic noprefixroute ens160
       valid_lft 1482sec preferred_lft 1482sec
    inet6 fe80::2d22:fc96:1bdb:33f4/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: virbr0:  mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:2d:79:02 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic:  mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:2d:79:02 brd ff:ff:ff:ff:ff:ff
[root@kvm2 network-scripts]# systemctl restart NetworkManager
[root@kvm2 network-scripts]# ip a
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens160:  mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:0c:29:2e:a5:d7 brd ff:ff:ff:ff:ff:ff
    inet 192.168.72.138/24 brd 192.168.72.255 scope global dynamic noprefixroute ens160
       valid_lft 1463sec preferred_lft 1463sec
    inet6 fe80::2d22:fc96:1bdb:33f4/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: virbr0:  mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:2d:79:02 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic:  mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:2d:79:02 brd ff:ff:ff:ff:ff:ff
5: br0:  mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 0a:91:4a:6b:7b:b4 brd ff:ff:ff:ff:ff:ff
    inet 192.168.72.138/24 brd 192.168.72.255 scope global noprefixroute br0
       valid_lft forever preferred_lft forever
[root@kvm2 network-scripts]# reboot

连接断开
连接成功
Last login: Wed Oct 20 21:32:22 2021 from 192.168.72.1
[root@kvm2 ~]# 
[root@kvm2 ~]# 
[root@kvm2 ~]# 
[root@kvm2 ~]# 
[root@kvm2 ~]# ip a
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: ens160:  mtu 1500 qdisc mq master br0 state UP group default qlen 1000
    link/ether 00:0c:29:2e:a5:d7 brd ff:ff:ff:ff:ff:ff
3: br0:  mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 00:0c:29:2e:a5:d7 brd ff:ff:ff:ff:ff:ff
    inet 192.168.72.138/24 brd 192.168.72.255 scope global noprefixroute br0
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe2e:a5d7/64 scope link 
       valid_lft forever preferred_lft forever
4: virbr0:  mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:2d:79:02 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
5: virbr0-nic:  mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:2d:79:02 brd ff:ff:ff:ff:ff:ff
[root@kvm2 ~]# systemctl start libvirtd
[root@kvm2 ~]# systemctl enable libvirtd
[root@kvm2 ~]# lsmod|grep kvm
kvm_intel             294912  0
kvm                   786432  1 kvm_intel
irqbypass              16384  1 kvm
[root@kvm2 ~]# virsh -c qemu:///system list
 Id    名称                         状态
----------------------------------------------------

[root@kvm2 ~]# virsh --version
4.5.0
[root@kvm2 ~]# virt-install --version
2.2.1
[root@kvm2 ~]# ln -s /usr/libexec/qemu-kvm /usr/bin/qemu-kvm
[root@kvm2 ~]# ll /usr/bin/qemu-kvm
lrwxrwxrwx 1 root root 21 10月 20 21:39 /usr/bin/qemu-kvm -> /usr/libexec/qemu-kvm
[root@kvm2 ~]# brctl show
bridge name     bridge id               STP enabled     interfaces
br0             8000.000c292ea5d7       no              ens160
virbr0          8000.5254002d7902       yes             virbr0-nic
[root@kvm2 ~]# getenforce 
Disabled
[root@kvm2 ~]# systemctl restart libvirtd
[root@kvm2 ~]# ss -antl
State        Recv-Q        Send-Q               Local Address:Port               Peer Address:Port       
LISTEN       0             128                        0.0.0.0:111                     0.0.0.0:*          
LISTEN       0             32                   192.168.122.1:53                      0.0.0.0:*          
LISTEN       0             128                        0.0.0.0:22                      0.0.0.0:*          
LISTEN       0             128                           [::]:111                        [::]:*          
LISTEN       0             128                           [::]:22                         [::]:*          
[root@kvm2 ~]# systemctl stop firewalld
[root@kvm2 ~]# setenforce 0
setenforce: SELinux is disabled
[root@kvm2 ~]# cd /var/lib/libvirt/images
[root@kvm2 images]# 

web

[root@web ~]# ssh-copy-id root@192.168.72.138
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
The authenticity of host '192.168.72.138 (192.168.72.138)' can't be established.
ECDSA key fingerprint is SHA256:EczzC1cmnInKnDJezHx/wuaazyzEdTIrbIIDkqOkqLc.
ECDSA key fingerprint is MD5:ef:6c:6c:72:ad:fe:86:ec:ab:14:2e:95:97:83:cc:4a.
Are you sure you want to continue connecting (yes/no)? yes
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@192.168.72.138's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'root@192.168.72.138'"
and check to make sure that only the key(s) you wanted were added.

[root@web ~]# su - nginx -s /bin/bash
上一次登录：三 10月 20 21:25:05 CST 2021pts/0 上
-bash-4.2$ ssh-copy-id root@192.168.72.138
/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/var/lib/nginx/.ssh/id_rsa.pub"
/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
Warning: Permanently added '192.168.72.138' (ECDSA) to the list of known hosts.
root@192.168.72.138's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'root@192.168.72.138'"
and check to make sure that only the key(s) you wanted were added.

-bash-4.2$ exit
登出
[root@web ~]# systemctl restart nginx
[root@web ~]# systemctl restart supervisord

在web界面添加