kvm web管理界面安装

kvm web管理界面安装

kvm 的 web 管理界面是由 webvirtmgr 程序提供的。

安装依赖包

[root@mp ~]# yum -y install git python-pip libvirt-python libxml2-python python-websockify supervisor nginx python-devel

升级pip

[root@mp ~]# pip install --upgrade pip
//过程省略......

从github上下载webvirtmgr代码

[root@mp ~]# cd /usr/local/src/
[root@mp src]# git clone git://github.com/retspen/webvirtmgr.git
正克隆到 'webvirtmgr'...
remote: Enumerating objects: 5614, done.
remote: Total 5614 (delta 0), reused 0 (delta 0), pack-reused 561
接收对象中: 100% (5614/5614), 2.98 MiB | 1011.00 KiB/s, done.
处理 delta 中: 100% (3602/3602), done.

安装webvirtmgr

[root@mp src]# cd webvirtmgr/
[root@mp webvirtmgr]# pip install -r requirements.txt
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
//安装过程省略......

检查sqlite3是否安装

[root@mp webvirtmgr]# python
Python 2.7.5 (default, Oct 30 2018, 23:45:53) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sqlite3
>>> exit()

初始化帐号信息

[root@kvm webvirtmgr]# python 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     //问你是否创建超级管理员帐号
Username (leave blank to use 'root'):   //指定超级管理员帐号用户名，默认留空为root
Email address: bebejo@126.com     //设置超级管理员邮箱
Password:1       //设置超级管理员密码
Password (again):1       //再次输入超级管理员密码
Superuser created successfully.
Installing custom SQL ...
Installing indexes ...
Installed 6 object(s) from 1 fixture(s)

拷贝web网页至指定目录

[root@mp webvirtmgr]# mkdir /var/www
[root@mp webvirtmgr]# cp -r /usr/local/src/webvirtmgr/ /var/www/
[root@mp webvirtmgr]# chown -R nginx.nginx /var/www/webvirtmgr/

生成密钥

//全部保持默认，回车即可
[root@mp ~]# 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:
SHA256:3/LDSmdcrWbrJxAXtt9HJD13UKlz4lTbYrCqzUNVkWQ root@mp
The key's randomart image is:
+---[RSA 2048]----+
|             .E*o|
|            ..*+=|
|             =o=*|
|            +==+o|
|        S  oo+=+o|
|         .oo.o .+|
|         =+.=.+ .|
|        ..+=oo...|
|          .o.ooo |
+----[SHA256]-----+

由于这里webvirtmgr和kvm服务部署在同一台机器，所以这里本地信任。如果kvm部署在其他机器，那么这个是它的ip

[root@mp ~]# ssh-copy-id 192.168.157.99
/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub"
The authenticity of host '192.168.157.99 (192.168.157.99)' can't be established.
ECDSA key fingerprint is SHA256:I20VCudXLSb+D75FPy0SjjexuAhmPkhN8hO4DZFjaT8.
ECDSA key fingerprint is MD5:f2:04:78:0f:b3:30:ae:12:66:05:85:97:e6:ab:80:15.
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@192.168.157.99's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh '192.168.157.99'"
and check to make sure that only the key(s) you wanted were added.

端口转发

[root@mp ~]# ssh 192.168.157.99 -L localhost:8000:localhost:8000 -L localhost:6080:localhost:60
Last login: Fri Mar 15 02:23:10 2019 from 192.168.157.1
[root@mp ~]# ss -antl 
State      Recv-Q Send-Q Local Address:Port               Peer Address:Port              
LISTEN     0      128        *:111                    *:*                  
LISTEN     0      5      192.168.122.1:53                     *:*                  
LISTEN     0      128        *:22                     *:*                  
LISTEN     0      100    127.0.0.1:25                     *:*                  
LISTEN     0      128    127.0.0.1:6080                   *:*                  
LISTEN     0      128    127.0.0.1:8000                   *:*                  
LISTEN     0      128       :::111                   :::*                  
LISTEN     0      128       :::22                    :::*                  
LISTEN     0      100      ::1:25                    :::*                  
LISTEN     0      128      ::1:6080                  :::*                  
LISTEN     0      128      ::1:8000                  :::*        

配置nginx

[root@mp ~]# 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@mp ~]# 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@mp ~]# 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
.....此处省略N行

重启nginx

[root@mp ~]# systemctl start nginx 
[root@mp ~]# ss -antl
State      Recv-Q Send-Q Local Address:Port               Peer Address:Port              
LISTEN     0      128        *:111                    *:*                  
LISTEN     0      128        *:80                     *:*                  
LISTEN     0      5      192.168.122.1:53                     *:*                  
LISTEN     0      128        *:22                     *:*                  
LISTEN     0      100    127.0.0.1:25                     *:*                  
LISTEN     0      128    127.0.0.1:6080                   *:*                  
LISTEN     0      128    127.0.0.1:8000                   *:*                  
LISTEN     0      128       :::111                   :::*                  
LISTEN     0      128       :::22                    :::*                  
LISTEN     0      100      ::1:25                    :::*                  
LISTEN     0      128      ::1:6080                  :::*                  
LISTEN     0      128      ::1:8000                  :::*        

设置supervisor

[root@mp ~]# 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并设置开机自动启动

[root@mp ~]# systemctl start supervisord
[root@mp ~]# systemctl enable supervisord
Created symlink from /etc/systemd/system/multi-user.target.wants/supervisord.service to /usr/lib/systemd/system/supervisord.service.
[root@mp ~]# systemctl status supervisord
● supervisord.service - Process Monitoring and Control Daemon
   Loaded: loaded (/usr/lib/systemd/system/supervisord.service; enabled; vendor preset: disabled)
   Active: active (running) since 五 2019-03-15 03:06:19 CST; 20s ago
 Main PID: 3326 (supervisord)
   CGroup: /system.slice/supervisord.service
           └─3326 /usr/bin/python /usr/bin/supervisord -c /etc/supervisor...

3月 15 03:06:18 mp systemd[1]: Starting Process Monitoring and Control.....
3月 15 03:06:19 mp systemd[1]: Started Process Monitoring and Control ...n.
Hint: Some lines were ellipsized, use -l to show in full.

[root@mp ~]# ss -antl 
State      Recv-Q Send-Q Local Address:Port               Peer Address:Port              
LISTEN     0      128        *:111                    *:*                  
LISTEN     0      128        *:80                     *:*                  
LISTEN     0      5      192.168.122.1:53                     *:*                  
LISTEN     0      128        *:22                     *:*                  
LISTEN     0      100    127.0.0.1:25                     *:*                  
LISTEN     0      128    127.0.0.1:6080                   *:*                  
LISTEN     0      128    127.0.0.1:8000                   *:*                  
LISTEN     0      128       :::111                   :::*                  
LISTEN     0      128       :::22                    :::*                  
LISTEN     0      100      ::1:25                    :::*                  
LISTEN     0      128      ::1:6080                  :::*                  
LISTEN     0      128      ::1:8000                  :::*     

配置nginx用户

//未创建nginx用户，所以用su命令赋予它交互式登录的权限
[root@mp ~]# su - nginx -s /bin/bash
-bash-4.2$ ssh-keygen -t rsa
//全部保持默认，回车即可，密码除外。
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:
SHA256:86tvVfX2z7hqCHz/rqVUKMQPReWO26hNWlpZaZOTOgg nginx@mp
The key's randomart image is:
+---[RSA 2048]----+
|           .o..  |
|         . . .  .|
|          +   ...|
|         . o +.+o|
|       .E . +.@..|
|        o+.o.X o.|
|         oo+@ oo.|
|          o@o+. o|
|        .+*.==+. |
+----[SHA256]-----+
-bash-4.2$ touch ~/.ssh/config && echo -e "StrictHostKeyChecking=no
UserKnownHostsFile=/dev/null" >> ~/.ssh/config
-bash-4.2$ chmod 0600 ~/.ssh/config
-bash-4.2$ ssh-copy-id root@192.168.157.99
/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 '192.168.157.99' (ECDSA) to the list of known hosts.
root@192.168.157.99's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'root@192.168.157.99'"
and check to make sure that only the key(s) you wanted were added.

-bash-4.2$ exit
登出

[root@mp ~]#  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@mp ~]# chown -R root.root /etc/polkit-1/localauthority/50-local.d/50-libvirt-remote-access.pkla
[root@mp ~]# systemctl restart nginx
[root@mp ~]# systemctl restart libvirtd

kvm web界面管理

通过ip地址在浏览器上访问kvm，例如我这里就是：http://192.168.157.99

此处的用户为：root
密码为：执行python manage syncdb时设置的超级管理员密码

此处的Label要与下面的FQDN / IP一致！

点击上方的IP地址，不是点击Host：192.168.157.99

kvm存储管理

//创建存储

点击New Storage

进入存储

点击default

池路径 /var/lib/libvirt/images：磁盘镜像ISO文件存储的位置

//通过远程连接软件上传ISO镜像文件至存储目录/var/lib/libvirt/images/

[root@mp ~]# cd /var/lib/libvirt/images/
[root@mp images]# ll
总用量 3963904
-rw-r--r-- 1 root root 4059037696 3月  15 03:50 rhel-server-7.4-x86_64-dvd.iso

在web界面查看ISO镜像文件是否存在

创建系统安装镜像

//添加成功如下图

kvm网络管理

点击New Network

实例管理

实例（虚拟机的创建）

//虚拟机插入光盘

//设置在web上访问虚拟机的密码

//启动虚拟机

//虚拟机安装

此步骤为虚拟机的安装步骤，不再阐述

所遇问题

4.1 故障一
第一次通过web访问kvm时可能会一直访问不了，一直转圈，而命令行界面一直报错(too many open files)

永久生效方法：
	修改/etc/security/limits.conf，在文件底部添加：
	* soft nofile 655360
	* hard nofile 655360
	星号代表全局， soft为软件，hard为硬件，nofile为这里指可打开文件数。
 
另外，要使limits.conf文件配置生效，必须要确保 pam_limits.so 文件被加入到启动文件中。
查看 /etc/pam.d/login 文件中有：
session required /lib/security/pam_limits.so

4.2 故障二
web界面配置完成后可能会出现以下错误界面

解决方法是安装novnc并通过novnc_server启动一个vnc

方法一

[root@mp ~]# ll /etc/rc.local
lrwxrwxrwx. 1 root root 13 Aug  6  2018 /etc/rc.local -> rc.d/rc.local
[root@mp ~]# ll /etc/rc.d/rc.local
-rw-r--r-- 1 root root 513 Mar 11 22:35 /etc/rc.d/rc.local
[root@mp ~]# chmod +x /etc/rc.d/rc.local
[root@mp ~]# ll /etc/rc.d/rc.local
-rwxr-xr-x 1 root root 513 Mar 11 22:35 /etc/rc.d/rc.local

[root@mp ~]# vim /etc/rc.d/rc.local
......此处省略N行
# that this script will be executed during boot.

touch /var/lock/subsys/local
nohup novnc_server 172.16.12.128:5920 &

[root@mp ~]# . /etc/rc.d/rc.local

方法二(推荐)

python /var/www/webvirtmgr/console/webvirtmgr-console