KVM network vlan

最新推荐文章于 2024-05-28 14:35:27 发布
最新推荐文章于 2024-05-28 14:35:27 发布
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分类专栏： 虚拟化 KVM qemu
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本文链接：https://blog.youkuaiyun.com/wozaiyizhideng/article/details/117533071
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本文详细探讨了KVM虚拟化环境中如何配置网络，并重点介绍了VLAN的使用，包括设置VLAN接口、隔离不同VLAN间的流量以及优化网络性能等方面，旨在帮助读者更好地理解和管理KVM虚拟机的网络环境。

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[root@localhost ~]# 
[root@localhost ~]# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.2.5.181  netmask 255.255.255.0  broadcast 10.2.5.255
        inet6 fe80::5054:ff:fe98:e17e  prefixlen 64  scopeid 0x20<link>
        ether 52:54:00:98:e1:7e  txqueuelen 1000  (Ethernet)
        RX packets 86967904  bytes 61065855943 (56.8 GiB)
        RX errors 0  dropped 46  overruns 0  frame 0
        TX packets 5052886  bytes 2188249614 (2.0 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 196161  bytes 51961541 (49.5 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 196161  bytes 51961541 (49.5 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:0b:1b:7b  txqueuelen 1000  (Ethernet)
        RX packets 4277155  bytes 12869552776 (11.9 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3461117  bytes 13566708939 (12.6 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.100.1  netmask 255.255.255.0  broadcast 192.168.100.255
        inet6 fe80::d094:14ff:fe46:fb4f  prefixlen 64  scopeid 0x20<link>
        ether d2:94:14:46:fb:4f  txqueuelen 1000  (Ethernet)
        RX packets 224  bytes 26192 (25.5 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 141  bytes 15433 (15.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@localhost ~]# 
[root@localhost ~]# ovs-vsctl show
90a0e0df-7785-4ba0-9042-b971b76dd96e
    Bridge "virbr2"
        Port "virbr2"
            Interface "virbr2"
                type: internal
    ovs_version: "2.12.0"
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# ip link add link virbr0 name virbr0.10 type vlan id 10
[root@localhost ~]# ifconfig -a
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.2.5.181  netmask 255.255.255.0  broadcast 10.2.5.255
        inet6 fe80::5054:ff:fe98:e17e  prefixlen 64  scopeid 0x20<link>
        ether 52:54:00:98:e1:7e  txqueuelen 1000  (Ethernet)
        RX packets 86968178  bytes 61065879085 (56.8 GiB)
        RX errors 0  dropped 46  overruns 0  frame 0
        TX packets 5052931  bytes 2188256592 (2.0 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 196161  bytes 51961541 (49.5 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 196161  bytes 51961541 (49.5 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ovs-system: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 56:a8:e8:e4:76:33  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:0b:1b:7b  txqueuelen 1000  (Ethernet)
        RX packets 4277155  bytes 12869552776 (11.9 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3461117  bytes 13566708939 (12.6 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.100.1  netmask 255.255.255.0  broadcast 192.168.100.255
        inet6 fe80::d094:14ff:fe46:fb4f  prefixlen 64  scopeid 0x20<link>
        ether d2:94:14:46:fb:4f  txqueuelen 1000  (Ethernet)
        RX packets 224  bytes 26192 (25.5 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 141  bytes 15433 (15.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0-nic: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 52:54:00:0b:1b:7b  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0.10: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 52:54:00:0b:1b:7b  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@localhost ~]# ifconfig virbr0.10 192.168.10.10 up
[root@localhost ~]# 
[root@localhost ~]# 










[root@localhost ~]# /usr/libexec/qemu-kvm centos70-64.qcow2 -enable-kvm -smp 2 -m 2G -device virtio-net-pci,netdev=vnet0 -netdev tap,id=vnet0 -monitor telnet::3333,server,nowait -serial stdio
VNC server running on ::1:5900


CentOS Linux 7 (Core)
Kernel 3.10.0-1127.el7.x86_64 on an x86_64

localhost login: root
Password: 
Last login: Thu Jun  3 07:16:18 on ttyS0
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# ifconfig 
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.122.76  netmask 255.255.255.0  broadcast 192.168.122.255
        inet6 fe80::e940:5ead:bd61:cde5  prefixlen 64  scopeid 0x20<link>
        ether 52:54:00:12:34:56  txqueuelen 1000  (Ethernet)
        RX packets 57  bytes 4711 (4.6 KiB)
        RX errors 0  dropped 21  overruns 0  frame 0
        TX packets 45  bytes 3977 (3.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@localhost ~]# ip link add link enp5s0 name eth0.10 type vlan id 10
Cannot find device "enp5s0"
[root@localhost ~]# ip link add link eth0 name eth0.10 type vlan id 10
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# ifconfig -a
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.122.76  netmask 255.255.255.0  broadcast 192.168.122.255
        inet6 fe80::e940:5ead:bd61:cde5  prefixlen 64  scopeid 0x20<link>
        ether 52:54:00:12:34:56  txqueuelen 1000  (Ethernet)
        RX packets 57  bytes 4711 (4.6 KiB)
        RX errors 0  dropped 21  overruns 0  frame 0
        TX packets 48  bytes 4247 (4.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth0.10: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 52:54:00:12:34:56  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@localhost ~]# ifconfig enp5s0.10 192.168.10.11 up
SIOCSIFADDR: No such device
enp5s0.10: ERROR while getting interface flags: No such device
enp5s0.10: ERROR while getting interface flags: No such device
[root@localhost ~]# ifconfig eth0.10 192.168.10.11 up
[root@localhost ~]# 
[root@localhost ~]# ping 192.168.10.10 -c 5 -I eth0.10
PING 192.168.10.10 (192.168.10.10) from 192.168.10.11 eth0.10: 56(84) bytes of data.
64 bytes from 192.168.10.10: icmp_seq=1 ttl=64 time=0.851 ms
64 bytes from 192.168.10.10: icmp_seq=2 ttl=64 time=0.425 ms
64 bytes from 192.168.10.10: icmp_seq=3 ttl=64 time=0.354 ms
64 bytes from 192.168.10.10: icmp_seq=4 ttl=64 time=0.449 ms
64 bytes from 192.168.10.10: icmp_seq=5 ttl=64 time=0.508 ms

--- 192.168.10.10 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4009ms
rtt min/avg/max/mdev = 0.354/0.517/0.851/0.175 ms
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# ping www.baidu.com -c 5 -I eth0.10
PING www.a.shifen.com (110.242.68.3) from 192.168.10.11 eth0.10: 56(84) bytes of data.

--- www.a.shifen.com ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 4000ms

[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.122.1   0.0.0.0         UG    100    0        0 eth0
192.168.10.0    0.0.0.0         255.255.255.0   U     0      0        0 eth0.10
192.168.122.0   0.0.0.0         255.255.255.0   U     100    0        0 eth0
[root@localhost ~]# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.122.1
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# ping www.baidu.com -c 5 -I eth0.10
PING www.a.shifen.com (110.242.68.4) from 192.168.10.11 eth0.10: 56(84) bytes of data.


--- www.a.shifen.com ping statistics ---
5 packets transmitted, 0 received, 100% packet loss, time 4000ms

[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# route add default gw 192.168.10.10
[root@localhost ~]# 
[root@localhost ~]# echo "nameserver 192.168.10.10" >> /etc/resolv.conf
[root@localhost ~]# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 192.168.122.1
nameserver 192.168.10.10
[root@localhost ~]# 
[root@localhost ~]# ping www.baidu.com -c 5 -I eth0.10
PING www.a.shifen.com (110.242.68.3) from 192.168.10.11 eth0.10: 56(84) bytes of data.
64 bytes from 110.242.68.3 (110.242.68.3): icmp_seq=1 ttl=49 time=12.4 ms
64 bytes from 110.242.68.3 (110.242.68.3): icmp_seq=2 ttl=49 time=41.6 ms
64 bytes from 110.242.68.3 (110.242.68.3): icmp_seq=3 ttl=49 time=10.2 ms
64 bytes from 110.242.68.3 (110.242.68.3): icmp_seq=4 ttl=49 time=45.1 ms
64 bytes from 110.242.68.3 (110.242.68.3): icmp_seq=5 ttl=49 time=54.2 ms

--- www.a.shifen.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4006ms
rtt min/avg/max/mdev = 10.233/32.724/54.201/17.963 ms
[root@localhost ~]# route 
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         gateway         0.0.0.0         UG    0      0        0 eth0.10
default         gateway         0.0.0.0         UG    100    0        0 eth0
192.168.10.0    0.0.0.0         255.255.255.0   U     0      0        0 eth0.10
192.168.122.0   0.0.0.0         255.255.255.0   U     100    0        0 eth0
[root@localhost ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.10.10   0.0.0.0         UG    0      0        0 eth0.10
0.0.0.0         192.168.122.1   0.0.0.0         UG    100    0        0 eth0
192.168.10.0    0.0.0.0         255.255.255.0   U     0      0        0 eth0.10
192.168.122.0   0.0.0.0         255.255.255.0   U     100    0        0 eth0
[root@localhost ~]# 





















[root@localhost ~]# ifconfig -a
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.2.5.181  netmask 255.255.255.0  broadcast 10.2.5.255
        inet6 fe80::5054:ff:fe98:e17e  prefixlen 64  scopeid 0x20<link>
        ether 52:54:00:98:e1:7e  txqueuelen 1000  (Ethernet)
        RX packets 86968742  bytes 61065926676 (56.8 GiB)
        RX errors 0  dropped 46  overruns 0  frame 0
        TX packets 5053132  bytes 2188336550 (2.0 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 196163  bytes 51961653 (49.5 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 196163  bytes 51961653 (49.5 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ovs-system: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 56:a8:e8:e4:76:33  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tap0: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 8a:ed:37:6b:58:0f  txqueuelen 1000  (Ethernet)
        RX packets 10  bytes 1372 (1.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:0b:1b:7b  txqueuelen 1000  (Ethernet)
        RX packets 4277155  bytes 12869552776 (11.9 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3461117  bytes 13566708939 (12.6 GiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.100.1  netmask 255.255.255.0  broadcast 192.168.100.255
        inet6 fe80::d094:14ff:fe46:fb4f  prefixlen 64  scopeid 0x20<link>
        ether d2:94:14:46:fb:4f  txqueuelen 1000  (Ethernet)
        RX packets 224  bytes 26192 (25.5 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 141  bytes 15433 (15.0 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0-nic: flags=4098<BROADCAST,MULTICAST>  mtu 1500
        ether 52:54:00:0b:1b:7b  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0.10: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.10.10  netmask 255.255.255.0  broadcast 192.168.10.255
        ether 52:54:00:0b:1b:7b  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@localhost ~]# 
[root@localhost ~]# brctl show
bridge name	bridge id		STP enabled	interfaces
virbr0		8000.5254000b1b7b	yes		virbr0-nic
[root@localhost ~]# 
[root@localhost ~]# cat /etc/qemu-ifup 
#!/bin/bash
switch=virbr0
#switch=br0
ifconfig $1 up
brctl addif $switch $1
#switch=virbr2
#ifconfig $1 up
#ovs-vsctl add-port $switch $1
[root@localhost ~]# ifconfig tap0 up
[root@localhost ~]# brctl addif virbr0 tap0
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# iptables -t nat -A POSTROUTING -s 192.168.10.0/24 ! -d 192.168.10.0/24 -j MASQUERADE
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# iptables -L -t nat
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination         

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination         
RETURN     all  --  192.168.122.0/24     base-address.mcast.net/24 
RETURN     all  --  192.168.122.0/24     255.255.255.255     
MASQUERADE  tcp  --  192.168.122.0/24    !192.168.122.0/24     masq ports: 1024-65535
MASQUERADE  udp  --  192.168.122.0/24    !192.168.122.0/24     masq ports: 1024-65535
MASQUERADE  all  --  192.168.122.0/24    !192.168.122.0/24    
MASQUERADE  all  --  192.168.100.0/24    !192.168.100.0/24    
MASQUERADE  all  --  192.168.10.0/24     !192.168.10.0/24     

Chain OUTPUT_direct (0 references)
target     prot opt source               destination         

Chain POSTROUTING_ZONES (0 references)
target     prot opt source               destination         

Chain POSTROUTING_ZONES_SOURCE (0 references)
target     prot opt source               destination         

Chain POSTROUTING_direct (0 references)
target     prot opt source               destination         

Chain POST_public (0 references)
target     prot opt source               destination         

Chain POST_public_allow (0 references)
target     prot opt source               destination         

Chain POST_public_deny (0 references)
target     prot opt source               destination         

Chain POST_public_log (0 references)
target     prot opt source               destination         

Chain PREROUTING_ZONES (0 references)
target     prot opt source               destination         

Chain PREROUTING_ZONES_SOURCE (0 references)
target     prot opt source               destination         

Chain PREROUTING_direct (0 references)
target     prot opt source               destination         

Chain PRE_public (0 references)
target     prot opt source               destination         

Chain PRE_public_allow (0 references)
target     prot opt source               destination         

Chain PRE_public_deny (0 references)
target     prot opt source               destination         

Chain PRE_public_log (0 references)
target     prot opt source               destination         
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# ps aux | grep dnsmasq
nobody   20887  0.0  0.0  53900  1092 ?        S    5月20   0:15 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper
root     20888  0.0  0.0  53872   568 ?        S    5月20   0:00 /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper
root     24155  0.0  0.0 112824   972 pts/6    D+   07:30   0:00 grep --color=auto dnsmasq
nobody   25372  0.0  0.0  53904   868 ?        S    5月20   0:00 dnsmasq --strict-order --except-interface=lo --interface=virbr2 --listen-address=192.168.100.1 --bind-interface --dhcp-range=192.168.100.2,192.168.100.254 --conf-file= --pid-file=/var/run/qemu-dhcp-virbr2.pid --dhcp-leasefile=/var/run/qemu-dhcp-virbr2.leases --dhcp-no-override
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# vim /var/lib/libvirt/dnsmasq/default.conf
[root@localhost ~]#

虚拟化技术 — 应用 Bridge 和 VLAN 子接口构建 KVM 多平面网络
烟云的计算
07-10 4845
目录 文章目录目录KVM 虚拟机应用 Linux Bridge + VLAN 实现网络隔离TSG: Failed to restart networkKVM 虚拟机应用 Linux Bridge + VLAN 实现网络隔离与跨主机互通使用 tcpdump 抓包，分析网络包传输路劲KVM 虚拟机应用 Linux Bridge + VLAN 实现网络隔离、跨主机互通并且与外网互通总结：KVM + LinuxBridge 的网络虚拟化方案 KVM 虚拟机应用 Linux Bridge + VLAN 实现网络隔离
如何给KVM上的VM配置VLAN?
阿太 Jin 的专栏
07-16 8799
KVM & BRCTL IN LINUX – BRINGING VLANS TO THE GUESTS
ubuntu server18.04配置网络
pocean2012的博客
05-23 1114
新安装的服务器，系统安装的ubuntu server18.04， 想当然以为网线插上就能正常连接，谁知不是这么回事。 查阅资料，参考文章 https://www.cnblogs.com/jianxuanbing/archive/2018/11/30/10042892.html 依葫芦画瓢，多次尝试，发现中间vim编辑的小trick，原文未说明。 1. 查看确认网卡信息 (base) xxxxx@jxxx:~$ ifconfig -a eno1: flags=4163<UP,BROADCAS
KVM虚拟网络概述
lingshengxiyou的博客
11-21 1967
使用dnsmasq服务，为虚拟网络中的虚拟机提供dhcp、dns服务（在/var/lib/libvirt/dnsmasq目录下，创建相应配置）forward mode：网络的路由转发类型，nat表示该网络提供nat服务，如果为route则表示该网络为普通路由网络。在使用虚拟网络前，需要通过虚拟网络xml配置文件，在libvirt中定义该虚拟网络。当虚拟网络停止后，该虚拟网络中正在运行的域，将无法进行数据通信。因此，最好将连接至虚拟网络上的域都停止后，再停止该虚拟网络。
kvm network
cybertan的专栏
02-08 1547
Chapter 10. Network Configuration 10.1. Network address translation (NAT) with libvirt 10.2. Bridged networking with libvirt This page provides an introduction to the common networking c
「KVM」- Networking @20210226
k4nz
02-26 443
本文介绍基于libvirt的应用程序使用的常见网络配置。 此信息适用于所有「Hypervisor」，无论是Xen，还是KVM，又或者其他。 两种常见设置是： * 虚拟网络：「NAT转发」。开箱即用，无需过多设置。 * 共享设备：「桥接网络」。需要进行特定的手动配置。 本文主要介绍这两种网络。最后一部分是「网络设备直通」相关的内容。 虚拟网络：NAT转发 #1 对Host配置 如果libvirt是标准安装的，那它默认提供基于NAT的虚拟机连接，开箱即用： # virsh net-l.
KVM网络环境下vlan和trunk的理解
祈心无尘的博客
11-16 1330
参考：https://www.cnblogs.com/yueshang/p/9454831.html # KVM网络环境之VLAN搭建。
KVM虚拟机网络模式
weixin_45880055的博客
07-25 3273
NAT模式 [root@kvm ~]# virt-install \ > --name template \ # 虚拟机名 > --ram=512 \ # 虚拟机内存大小，单位M > --vcpus=1 \ # 虚拟机CPU核心数 > --cdrom=/home/iso/CentOS-7-x86_64-Minimal-1708.iso \ # 镜像文件位置 > --disk path=/var/lib/libvirt/images/template.qcow2,
KVM安装+vlan配置(超详细)
Justdoforever的博客
05-18 3213
1. KVM安装 1.1 配置确认 首先需要确认服务器的硬件是否支持虚拟化，执行如下命令确认 egrep -c '(vmx|svm)' /proc/cpuinfo 如果输出结果大于0，意味着服务器硬件是支持虚拟化的。否则，重启进入BIOS设置中启用VT技术。 执行如下命令安装kvm-ok程序，来确定服务器是否能够运行硬件加速的KVM虚拟机 sudo kvm-ok 1.2 安装KVM 安装KVM及依赖项 sudo apt update sudo apt install qemu qemu
centos 7 下双网卡bond 与 trunk口的交换机通信(用作KVM虚拟机)
01-09
trunk 是实现不同网络设备的不同Vlan之间的通信 注意： 网卡也属于网络设备，设置vlan后也可以通信 先说下我的环境 网络工程师在两台交换机上做了两个trunk模式的vlan 两个口分别连接服务器的 1网卡和2网卡 这样做...
linux KVM的网络设置方法（bridge和nat）
zsk_john的技术分享专用博客
07-30 5440
代码】linuxKVM的网络设置方法（bridge和nat）
[ kvm ] 四种简单的网络模型
JL-LOVE
10-21 1551
1. 隔离模式：虚拟机之间组建网络，该模式无法与宿主机通信，无法与其他网络通信，相当于虚拟机只是连接到一台交换机上。 2. 路由模式：相当于虚拟机连接到一台路由器上，由路由器(物理网卡)，统一转发，但是不会改变源地址。 3. NAT模式：在路由模式中，会出现虚拟机可以访问其他主机，但是其他主机的报文无法到达虚拟机，而NAT模式则将源地址转换为路由器(物理网卡)地址，这样其他主机也知道报文来自那个主机，在docker环境中经常被使用。 4. 桥接模式：在宿主机中创建一张虚拟网卡作为宿主机的网卡，而物理网卡则作
KVM的网络Networking-qemu-kvm和openvswitch原型环境部署和基本测试 (3)
weixin_30455067的博客
07-20 265
KVM的网络Networking 本文分为以下几个部分： 用户网络User Networking 私有虚拟网桥Private Virtual Bridge 公有网桥Public Bridge 参考文档：http://www.linux-kvm.org/page/Networking 从http://www.linux-kvm.org/page/HOWTO找到的该网页。 *** KVM的back...
KVM网络模式解析
最新发布
2301_81245072的博客
05-28 873
/usr/libexec/qemu-kvm -net nic,model=?rt18139 这个网卡类型是kvm默认的网卡类型；e1000 是Intel网卡类型；virsh net-list 每创建一个网络，都会自动生产一个配置文件。/etc/libvirt/qemu/networks/cd /usr/share/libvirt/networks/cp default.xml new_nat.xmlvi new_nat.xml virsh --help |grep netvirsh net-d
openstack-KVM-Network
weixin_30315905的博客
02-03 110
一、网络配置 1、查看网卡信息： 　　lspci | grep Ethernet 　　ethtool -i eth0 　　(qemu) info network 　　virsh qemu-monitor-command chen --hmp info 2、QEMU支持的网络模式 　　基于网桥(bridge)的虚拟网卡 　　基于NAT(Network Address ...
KVM中的四种简单网络模型
xdy762024688的博客
08-31 2023
KVM中的四种简单网络模型，分别如下：1、隔离模型（QEMU内置的用户模式网络（user mode networking））：虚拟机之间组建网络，该模式无法与宿主机通信，无法与其他网络通信，相当于虚拟机只是连接到一台交换机上。2、路由模型（直接分配网络设备（包括VT-d和SR-IOV））：相当于虚拟机连接到一台路由器上，由路由器(物理网卡)，统一转发，但是不会改变源地址。
KVM部署
运维小lemon的博客
03-11 1274
一、环境说明 系统类型 ip 服务 RHEL7 192.168.100.33 kvm 关闭防火墙和selinux [root@kvm ~]# systemctl stop firewalld [root@kvm ~]# systemctl disable firewalld [root@kvm ~]# sed -ri 's/^(SELINUX=).*/\1disabled/g...
105-脚本启动网络
Lich Howger
10-31 295
第一步.安装fabric镜像 不要用克隆 直接脚本下载安装 curl -sSL http://bit.ly/2ysbOFE | bash -s -- 1.4.9 1.4.9 0.4.21 或者用bootstrap脚本 第二步.创建网络 ./byfn.sh generate 第三步.启动网络 ./byfn.sh up -l node 第四...
KVM的行为管理 nwfilter规则
Y1309SIR的博客
08-08 1488
KVM的行为规则管理 比如 IP的黑名单白名单 以及端口的黑名单白名单 nwfilter目的是让管理员在host上控制vm的每块网卡。同一个nwfilter规则可以被不同vm重复使用，也可以每个VM创建不同的filter规则。 它的默认路径在/etc/libvirt/nwfilter/ 默认libvirt安装好后会加载一些规则，用户也可以自定义规则。 自定义的规则编写好后使用下面命令加载...
KVM虚拟机网络环境配置图文详解
内部虚拟网络也称为虚拟局域网（VLAN），通过创建虚拟交换机来连接宿主机和虚拟机，允许宿主机和虚拟机之间以及虚拟机与虚拟机之间的通信，但不提供外部网络连接。这种模式常用于虚拟机之间的网络环境测试。 接...
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