askubuntu.com/questions/574548/ubuntu-kvm-guest-dns-problems Descarregue o iptables e configure o padrão para aceitar. Ficou confuso.
Esta é uma ocorrência comum no meu servidor KVM e é frustrante porque apenas mexendo com a rede no servidor corrige o problema e não tenho idéia de como ele é consertado.
A falta de energia da noite anterior devido a strongs tempestades provocou essa instância. A energia foi desligada, o que significa que o servidor caiu porque não tem a fonte de alimentação redundante conectada, porque não faria diferença. Está no mesmo circuito no meu porão e é apenas o meu divertido servidor nerd em que eu hospedo serviços pessoais. Agora, os convidados kvm não podem acessar a Internet normalmente porque o dns falha. Um ponto positivo é que eles podem fazer ping por endereço IP, mas isso não ajuda muito, infelizmente.
Eu tenho a maioria dos servidores kvm na ponte br0 e roteio o tráfego em vez de rotea-lo para que eu possa atribuí-los IPs estáticos na minha rede interna e a porta os encaminhe. Eu incluí a configuração 'ip r' e 'ip a' do meu host kvm, e o xmldump kvm do meu não confiável a partir do servidor de email.
Agradeço qualquer ajuda ou instruções para solução de problemas que qualquer pessoa possa me dar. Obrigado !!
default via 192.168.86.1 dev br0
169.254.0.0/16 dev br0 scope link metric 1008
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1
192.168.86.0/24 dev br0 proto kernel scope link src 192.168.86.254
192.168.100.0/24 dev virbr0 proto kernel scope link src 192.168.100.1
192.168.122.0/24 dev defaultbr proto kernel scope link src 192.168.122.1
1: lo: mtu 65536 qdisc noqueue state UNKNOWN qlen 1
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: enp3s0f0: mtu 1500 qdisc mq master br0 state UP qlen 1000
link/ether b4:99:ba:05:39:22 brd ff:ff:ff:ff:ff:ff
inet6 fe80::b699:baff:fe05:3922/64 scope link
valid_lft forever preferred_lft forever
3: enp3s0f1: mtu 1500 qdisc noop state DOWN qlen 1000
link/ether b4:99:ba:05:39:24 brd ff:ff:ff:ff:ff:ff
4: enp4s0f0: mtu 1500 qdisc noop state DOWN qlen 1000
link/ether b4:99:ba:05:39:26 brd ff:ff:ff:ff:ff:ff
5: enp4s0f1: mtu 1500 qdisc noop state DOWN qlen 1000
link/ether b4:99:ba:05:39:28 brd ff:ff:ff:ff:ff:ff
6: ib0: mtu 4092 qdisc noop state DOWN qlen 256
link/infiniband 80:00:02:08:fe:80:00:00:00:00:00:00:00:16:35:ff:ff:bf:fb:f5 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff
7: ib1: mtu 4092 qdisc noop state DOWN qlen 256
link/infiniband 80:00:02:09:fe:80:00:00:00:00:00:00:00:16:35:ff:ff:bf:fb:f6 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff
8: br0: mtu 1500 qdisc noqueue state UP qlen 1000
link/ether b4:99:ba:05:39:22 brd ff:ff:ff:ff:ff:ff
inet 192.168.86.254/24 brd 192.168.86.255 scope global br0
valid_lft forever preferred_lft forever
inet6 fe80::b699:baff:fe05:3922/64 scope link
valid_lft forever preferred_lft forever
9: defaultbr: mtu 1500 qdisc noqueue state DOWN qlen 1000
link/ether 52:54:00:02:c8:49 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global defaultbr
valid_lft forever preferred_lft forever
10: defaultbr-nic: mtu 1500 qdisc pfifo_fast master defaultbr state DOWN qlen 1000
link/ether 52:54:00:02:c8:49 brd ff:ff:ff:ff:ff:ff
11: virbr0: mtu 1500 qdisc noqueue state UP qlen 1000
link/ether 52:54:00:f8:4c:be brd ff:ff:ff:ff:ff:ff
inet 192.168.100.1/24 brd 192.168.100.255 scope global virbr0
valid_lft forever preferred_lft forever
12: virbr0-nic: mtu 1500 qdisc pfifo_fast master virbr0 state DOWN qlen 1000
link/ether 52:54:00:f8:4c:be brd ff:ff:ff:ff:ff:ff
13: vnet0: mtu 1500 qdisc pfifo_fast master br0 state UNKNOWN qlen 1000
link/ether fe:54:00:3f:08:1f brd ff:ff:ff:ff:ff:ff
inet6 fe80::fc54:ff:fe3f:81f/64 scope link
valid_lft forever preferred_lft forever
14: docker0: mtu 1500 qdisc noqueue state UP
link/ether 02:42:22:11:f5:ab brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 scope global docker0
valid_lft forever preferred_lft forever
inet6 fe80::42:22ff:fe11:f5ab/64 scope link
valid_lft forever preferred_lft forever
18: veth776aca1@if17: mtu 1500 qdisc noqueue master docker0 state UP
link/ether da:8a:e2:11:8a:6f brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet6 fe80::d88a:e2ff:fe11:8a6f/64 scope link
valid_lft forever preferred_lft forever
35: vnet1: mtu 1500 qdisc pfifo_fast master br0 state UNKNOWN qlen 1000
link/ether fe:54:00:c5:0f:38 brd ff:ff:ff:ff:ff:ff
inet6 fe80::fc54:ff:fec5:f38/64 scope link
valid_lft forever preferred_lft forever
36: vnet2: mtu 1500 qdisc pfifo_fast master br0 state UNKNOWN qlen 1000
link/ether fe:54:00:3c:a8:3c brd ff:ff:ff:ff:ff:ff
inet6 fe80::fc54:ff:fe3c:a83c/64 scope link
valid_lft forever preferred_lft forever
37: vnet3: mtu 1500 qdisc pfifo_fast master virbr0 state UNKNOWN qlen 1000
link/ether fe:54:00:a8:a2:1e brd ff:ff:ff:ff:ff:ff
inet6 fe80::fc54:ff:fea8:a21e/64 scope link
valid_lft forever preferred_lft forever
38: vnet4: mtu 1500 qdisc pfifo_fast master virbr0 state UNKNOWN qlen 1000
link/ether fe:54:00:48:fa:1f brd ff:ff:ff:ff:ff:ff
inet6 fe80::fc54:ff:fe48:fa1f/64 scope link
valid_lft forever preferred_lft forever
39: vnet5: mtu 1500 qdisc pfifo_fast master br0 state UNKNOWN qlen 1000
link/ether fe:54:00:20:c2:ce brd ff:ff:ff:ff:ff:ff
inet6 fe80::fc54:ff:fe20:c2ce/64 scope link
valid_lft forever preferred_lft forever
zimbra-centos7
aacb9a74-d5f9-48c0-8d26-481cd573bcfd
8392704
8392704
2
/machine
hvm
Westmere
destroy
restart
restart
/usr/libexec/qemu-kvm
system_u:system_r:svirt_t:s0:c340,c568
system_u:object_r:svirt_image_t:s0:c340,c568
+107:+107
+107:+107
Tags dns networking ip kvm-switch linux