[root@server ~]# virsh list
Id Name State
----------------------------------------------------
9 kvm01 running
[root@server ~]# virsh list --all
Id Name State
----------------------------------------------------
9 kvm01 running
[root@server kvm]# virsh dumpxml kvm01 > /etc/libvirt/qemu/kvm01.xml
[root@server kvm]# virsh define /etc/libvirt/qemu/kvm01.xml
Domain kvm01 defined from /etc/libvirt/qemu/kvm01.xml
4.虚拟机查看新增网卡
[root@server kvm]# ssh [email protected]
The authenticity of host '192.168.3.169 (192.168.3.169)' can't be established.
ECDSA key fingerprint is SHA256:SMUWtN77SI+zUIX2bBR7/hY176zJLiWvY7KpIUlK0dw.
ECDSA key fingerprint is MD5:df:58:7e:61:73:82:b5:56:03:25:60:f1:80:a6:b1:0b.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.3.169' (ECDSA) to the list of known hosts.
[email protected]'s password:
Last login: Tue Oct 18 23:19:15 2022 from 192.168.3.11
[root@serer01 ~]# ip add
1: lo: mtu 65536 qdisc noqueue state UNKNOWN
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: eth0: mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 52:54:00:6c:cb:10 brd ff:ff:ff:ff:ff:ff
inet 192.168.3.169/24 brd 192.168.3.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::5054:ff:fe6c:cb10/64 scope link
valid_lft forever preferred_lft forever
3: docker0: mtu 1500 qdisc noqueue state UP
link/ether 02:42:5d:4a:c4:9f brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
inet6 fe80::42:5dff:fe4a:c49f/64 scope link
valid_lft forever preferred_lft forever
5: veth0604e80@if4: mtu 1500 qdisc noqueue master docker0 state UP
link/ether be:7f:bd:57:88:71 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet6 fe80::bc7f:bdff:fe57:8871/64 scope link
valid_lft forever preferred_lft forever
6: ens7: mtu 1500 qdisc noop state DOWN qlen 1000
link/ether 52:54:00:45:1b:53 brd ff:ff:ff:ff:ff:ff
5.删除网卡
需要将虚拟机关机再进行删除网卡操作
[root@server kvm]# virsh detach-interface kvm01 --type bridge --mac 52:54:00:45:1b:53 --config
Interface detached successfully
[root@server kvm]# virsh dumpxml kvm01 > /etc/libvirt/qemu/kvm01.xml
[root@server kvm]# virsh define /etc/libvirt/qemu/kvm01.xml
Domain kvm01 defined from /etc/libvirt/qemu/kvm01.xml
[root@server kvm]# virsh domiflist kvm01
Interface Type Source Model MAC
-------------------------------------------------------
- bridge br0 virtio 52:54:00:6c:cb:10
五、KVM虚拟机的快照管理
1.创建快照
[root@server kvm]# virsh snapshot-create kvm01
Domain snapshot 1666155063 created
2.查看快照列表
[root@server kvm]# virsh snapshot-list kvm01
Name Creation Time State
------------------------------------------------------------
1666155063 2022-10-19 12:51:03 +0800 shutoff
访问权限是java中一个比较中要的知识点,它规定者什么方法可以访问,什么不可以访问
一:包访问权限;
自定义包:
package com.wj.control;
//包
public class Demo {
//定义一个无参的方法
public void DemoPackage(){
System.out.println("调用
用户自定义聚合函数，用户提供的多个入参通过聚合计算(求和、求最大值、求最小值)得到一个聚合计算结果的函数。
问题：UDF也可以提供输入多个参数然后输出一个结果的运算，比如加法运算add(3，5)，add这个UDF需要实现UDF的evaluate方法,那么UDF和UDAF的实质分别究竟是什么？
Double evaluate(Double a, Double b)
在利用tomcat-redis-session-manager做session同步时，遇到了在session保存一个自定义对象时，修改该对象中的某个属性，session未进行序列化，属性没有被存储到redis中。 在 tomcat-redis-session-manager的github上有如下说明： Session Change Tracking
As noted in the &qu
关于Table Driven Approach的一篇非常好的文章：
http://www.codeproject.com/Articles/42732/Table-driven-Approach
package com.ljn.base;
import java.util.Random;
public class TableDriven {
public
