我有一台 CentOS 7 服务器，其 VXLAN 接口连接到网桥。服务器正在使用网络服务。未安装网络管理器。此/sbin/ifup-local脚本在网桥启动后设置 VXLAN 接口。
#!/bin/bash
# Set up VXLAN once cloudbr0 is available.
if [[ "$1" == "cloudbr0" ]]
then
ip link add vxlan100 type vxlan id 100 dstport 4789 group "240.10.11.1" dev "eth0"
brctl addif cloudbr0 vxlan100
ip link set up dev vxlan100
fi
它工作了一段时间，然后 VXLAN 接口就消失了。我需要帮助找出原因并修复。我在 中看到了这一点/var/log/messages。
Mar 7 18:20:37 cloudstack-worker-4 kernel: brvxlan100-100: port 2(vnet0) entered disabled state
Mar 7 18:20:37 cloudstack-worker-4 kernel: device vnet0 left promiscuous mode
Mar 7 18:20:37 cloudstack-worker-4 kernel: brvxlan100-100: port 2(vnet0) entered disabled state
Mar 7 18:20:37 cloudstack-worker-4 libvirtd: 2022-03-07 18:20:37.544+0000: 85757: error : qemuMonitorIO:718 : internal error: End of file from qemu monitor
Mar 7 18:20:37 cloudstack-worker-4 kvm: 0 guests now active
Mar 7 18:20:37 cloudstack-worker-4 systemd-machined: Machine qemu-5-i-2-34-VM terminated.
Mar 7 18:20:38 cloudstack-worker-4 java: libvirt: QEMU Driver error : Domain not found: no domain with matching uuid '32a413eb-7d54-4b63-bcea-4354c9649db9' (i-2-34-VM)
Mar 7 18:20:38 cloudstack-worker-4 java: WARN [kvm.resource.LibvirtKvmAgentHook] (agentRequest-Handler-5:) (logid:e71a1258) Groovy script '/etc/cloudstack/agent/hooks/libvirt-vm-state-change.groovy' is not available. Transformations will not be applied.
Mar 7 18:20:38 cloudstack-worker-4 java: WARN [kvm.resource.LibvirtKvmAgentHook] (agentRequest-Handler-5:) (logid:e71a1258) Groovy scripting engine is not initialized. Data transformation skipped.
Mar 7 18:20:38 cloudstack-worker-4 kernel: cloudbr0: port 2(vxlan100) entered disabled state
Mar 7 18:20:38 cloudstack-worker-4 kernel: device vxlan100 left promiscuous mode
Mar 7 18:20:38 cloudstack-worker-4 kernel: brvxlan100-100: port 1(vxlan100.100) entered disabled state
Mar 7 18:20:38 cloudstack-worker-4 kernel: brvxlan100-100: port 1(vxlan100.100) entered disabled state
Mar 7 18:20:39 cloudstack-worker-4 ntpd[83942]: Deleting interface #23 brvxlan100-100, fe80::4890:56ff:fe85:3cb3#123, interface stats: received=0, sent=0, dropped=0, active_time=571 secs
Mar 7 18:20:39 cloudstack-worker-4 ntpd[83942]: Deleting interface #22 vnet0, fe80::fc00:6bff:fe5b:1#123, interface stats: received=0, sent=0, dropped=0, active_time=571 secs
Mar 7 18:20:39 cloudstack-worker-4 ntpd[83942]: Deleting interface #21 vxlan100.100, fe80::8c5:cff:fec1:2025#123, interface stats: received=0, sent=0, dropped=0, active_time=571 secs
Mar 7 18:20:39 cloudstack-worker-4 ntpd[83942]: Deleting interface #14 vxlan100.179, fe80::8c5:cff:fec1:2025#123, interface stats: received=0, sent=0, dropped=0, active_time=1274 secs
Mar 7 18:20:39 cloudstack-worker-4 ntpd[83942]: Deleting interface #7 vxlan100, fe80::8c5:cff:fec1:2025#123, interface stats: received=0, sent=0, dropped=0, active_time=264643 secs
Mar 7 18:36:08 cloudstack-worker-4 java: INFO [cloud.agent.Agent] (Agent-Handler-2:) (logid:6fdfda4a) Lost connection to host: 10.11.0.2. Attempting reconnection while we still have 0 commands in progress.
Mar 7 18:36:08 cloudstack-worker-4 java: INFO [utils.nio.NioClient] (Agent-Handler-2:) (logid:6fdfda4a) NioClient connection closed
Mar 7 18:36:08 cloudstack-worker-4 java: INFO [cloud.agent.Agent] (Agent-Handler-2:) (logid:6fdfda4a) Reconnecting to host:10.11.0.2
Mar 7 18:36:08 cloudstack-worker-4 java: INFO [utils.nio.NioClient] (Agent-Handler-2:) (logid:6fdfda4a) Connecting to 10.11.0.2:8250
Mar 7 18:36:11 cloudstack-worker-4 java: ERROR [utils.nio.NioConnection] (Agent-Handler-2:) (logid:6fdfda4a) Unable to initialize the threads.
Mar 7 18:36:11 cloudstack-worker-4 java: java.net.NoRouteToHostException: No route to host
运行systemctl status network显示网络服务正常运行时间较长（比接口消失后的时间长很多）。 systemctl restart network成功地使缺失的界面恢复存在。然后过了一段时间，界面又消失了。
知道为什么界面消失了吗？其他接口继续工作。有没有更可靠的方法来配置接口？
更新1
ip link界面消失后输出：
[centos@cloudstack-worker-3 ~]$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9001 qdisc mq state UP mode DEFAULT group default qlen 1000
link/ether 0e:e1:87:a2:92:db brd ff:ff:ff:ff:ff:ff
3: ethdummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master cloudbr0 state UNKNOWN mode DEFAULT group default qlen 1000
link/ether 8a:9d:8a:91:9c:6e brd ff:ff:ff:ff:ff:ff
8: cloud0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
23: cloudbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
link/ether 8a:9d:8a:91:9c:6e brd ff:ff:ff:ff:ff:ff
ip linkafter的输出systemctl restart network使界面返回：
[root@cloudstack-worker-3 centos]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> 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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9001 qdisc mq state UP group default qlen 1000
link/ether 0e:e1:87:a2:92:db brd ff:ff:ff:ff:ff:ff
inet 10.10.67.48/18 brd 10.10.127.255 scope global dynamic eth0
valid_lft 2361sec preferred_lft 2361sec
inet6 fe80::ce1:87ff:fea2:92db/64 scope link
valid_lft forever preferred_lft forever
3: ethdummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master cloudbr0 state UNKNOWN group default qlen 1000
link/ether 8a:9d:8a:91:9c:6e brd ff:ff:ff:ff:ff:ff
8: cloud0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
inet 169.254.0.1/16 scope global cloud0
valid_lft forever preferred_lft forever
inet6 fe80::248d:90ff:fe51:1fa1/64 scope link
valid_lft forever preferred_lft forever
23: cloudbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
inet 10.11.0.13/16 brd 10.11.255.255 scope global cloudbr0
valid_lft forever preferred_lft forever
inet6 fe80::889d:8aff:fe91:9c6e/64 scope link
valid_lft forever preferred_lft forever
30: vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue master cloudbr0 state UNKNOWN group default qlen 1000
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
inet6 fe80::68bb:e5ff:fecb:8ab1/64 scope link
valid_lft forever preferred_lft forever
更新2
我跑ip -ts monitor link了一段时间，界面消失前后有很多活动。 （/var/log/messages显示 ntpd 在 17:20:21 检测到已删除的接口。）
[root@cloudstack-worker-3 centos]# ip -ts monitor link
[2022-03-08T17:12:06.165185] 30: vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue master cloudbr0 state UNKNOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.165394] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST> mtu 8951 qdisc noop state DOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.165812] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue state UP group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.167814] 32: brvxlan100-100: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
link/ether ea:26:7d:91:78:ff brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.168344] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default
link/ether ea:26:7d:91:78:ff brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.170981] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue master brvxlan100-100 state UP group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.171376] 30: vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue master cloudbr0 state UNKNOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.171414] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue master brvxlan100-100 state UP group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.171459] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default
link/ether ea:26:7d:91:78:ff brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.172330] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 master brvxlan100-100 state UP
link/ether 6a:bb:e5:cb:8a:b1
[2022-03-08T17:12:06.172339] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 master brvxlan100-100 state UP
link/ether 6a:bb:e5:cb:8a:b1
[2022-03-08T17:12:06.172345] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 master brvxlan100-100 state UP
link/ether 6a:bb:e5:cb:8a:b1
[2022-03-08T17:12:06.172372] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.172421] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue state UNKNOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.209537] 33: vnet0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
link/ether 02:4f:a5:47:6e:c9 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.209863] 33: vnet0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
link/ether fe:00:61:80:00:02 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.209874] 33: vnet0: <BROADCAST,MULTICAST> mtu 8951 qdisc noop state DOWN group default
link/ether fe:00:61:80:00:02 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.210667] 33: vnet0: <BROADCAST,MULTICAST> mtu 8951 qdisc noop master brvxlan100-100 state DOWN group default
link/ether fe:00:61:80:00:02 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.211017] 33: vnet0: <BROADCAST,MULTICAST> mtu 8951 qdisc noop master brvxlan100-100 state DOWN group default
link/ether fe:00:61:80:00:02 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.211096] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue state UNKNOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.211113] 33: vnet0: <BROADCAST,MULTICAST> mtu 8951 master brvxlan100-100 state DOWN
link/ether fe:00:61:80:00:02
[2022-03-08T17:12:06.211176] 33: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc pfifo_fast master brvxlan100-100 state UNKNOWN group default
link/ether fe:00:61:80:00:02 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.212034] 33: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 master brvxlan100-100 state UNKNOWN
link/ether fe:00:61:80:00:02
[2022-03-08T17:12:06.212066] 33: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 master brvxlan100-100 state UNKNOWN
link/ether fe:00:61:80:00:02
[2022-03-08T17:12:06.212073] 33: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 master brvxlan100-100 state UNKNOWN
link/ether fe:00:61:80:00:02
[2022-03-08T17:12:06.234242] 34: vnet1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
link/ether 36:3d:41:4e:01:07 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.234316] 34: vnet1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.235157] 34: vnet1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop master cloud0 state DOWN group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.235509] 34: vnet1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop master cloud0 state DOWN group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.235551] 8: cloud0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.235559] 34: vnet1: <BROADCAST,MULTICAST> mtu 1500 master cloud0 state DOWN
link/ether fe:00:a9:fe:1f:0a
[2022-03-08T17:12:06.235603] 8: cloud0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.235685] 34: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master cloud0 state UNKNOWN group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.236450] 34: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master cloud0 state UNKNOWN
link/ether fe:00:a9:fe:1f:0a
[2022-03-08T17:12:06.236458] 34: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master cloud0 state UNKNOWN
link/ether fe:00:a9:fe:1f:0a
[2022-03-08T17:12:06.236464] 34: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master cloud0 state UNKNOWN
link/ether fe:00:a9:fe:1f:0a
[2022-03-08T17:12:06.236759] 35: vnet2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
link/ether ee:73:d0:55:96:b8 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.236818] 35: vnet2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
link/ether fe:00:ed:00:01:c9 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.237680] 35: vnet2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop master cloudbr0 state DOWN group default
link/ether fe:00:ed:00:01:c9 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.238113] 35: vnet2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop master cloudbr0 state DOWN group default
link/ether fe:00:ed:00:01:c9 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.238121] 35: vnet2: <BROADCAST,MULTICAST> mtu 1500 master cloudbr0 state DOWN
link/ether fe:00:ed:00:01:c9
[2022-03-08T17:12:06.238205] 35: vnet2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master cloudbr0 state UNKNOWN group default
link/ether fe:00:ed:00:01:c9 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.238997] 35: vnet2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master cloudbr0 state UNKNOWN
link/ether fe:00:ed:00:01:c9
[2022-03-08T17:12:06.239008] 35: vnet2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master cloudbr0 state UNKNOWN
link/ether fe:00:ed:00:01:c9
[2022-03-08T17:12:06.239013] 35: vnet2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master cloudbr0 state UNKNOWN
link/ether fe:00:ed:00:01:c9
[2022-03-08T17:12:06.239128] 8: cloud0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.342461] 33: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc htb master brvxlan100-100 state UNKNOWN group default
link/ether fe:00:61:80:00:02 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.342563] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue state UNKNOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.342624] 33: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc htb master brvxlan100-100 state UNKNOWN group default
link/ether fe:00:61:80:00:02 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.342660] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue state UNKNOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.342893] 34: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master cloud0 state UNKNOWN group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.342959] 8: cloud0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.343006] 34: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master cloud0 state UNKNOWN group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.343042] 8: cloud0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.343255] 35: vnet2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc htb master cloudbr0 state UNKNOWN group default
link/ether fe:00:ed:00:01:c9 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:06.343314] 35: vnet2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc htb master cloudbr0 state UNKNOWN group default
link/ether fe:00:ed:00:01:c9 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:07.166770] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue state UP group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:09.839987] 33: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc htb master brvxlan100-100 state UNKNOWN group default
link/ether fe:00:61:80:00:02 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:09.840016] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue state UP group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:09.848776] 34: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master cloud0 state UNKNOWN group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:09.848821] 8: cloud0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:09.852466] 35: vnet2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc htb master cloudbr0 state UNKNOWN group default
link/ether fe:00:ed:00:01:c9 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:12:11.254594] 35: vnet2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master cloudbr0 state UNKNOWN
link/ether fe:00:ed:00:01:c9
[2022-03-08T17:12:21.174674] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 master brvxlan100-100 state UP
link/ether 6a:bb:e5:cb:8a:b1
[2022-03-08T17:12:21.238653] 34: vnet1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master cloud0 state UNKNOWN
link/ether fe:00:a9:fe:1f:0a
[2022-03-08T17:12:21.239591] 33: vnet0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 master brvxlan100-100 state UNKNOWN
link/ether fe:00:61:80:00:02
[2022-03-08T17:20:19.215787] 33: vnet0: <BROADCAST,MULTICAST> mtu 8951 qdisc htb master brvxlan100-100 state DOWN group default
link/ether fe:00:61:80:00:02 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:19.216347] 33: vnet0: <BROADCAST,MULTICAST> mtu 8951 master brvxlan100-100 state DOWN
link/ether fe:00:61:80:00:02
[2022-03-08T17:20:19.216361] 33: vnet0: <BROADCAST,MULTICAST> mtu 8951 master brvxlan100-100 state DOWN
link/ether fe:00:61:80:00:02
[2022-03-08T17:20:19.218506] 33: vnet0: <BROADCAST,MULTICAST> mtu 8951 master brvxlan100-100 state DOWN
link/ether fe:00:61:80:00:02
[2022-03-08T17:20:19.218518] Deleted 33: vnet0: <BROADCAST,MULTICAST> mtu 8951 master brvxlan100-100 state DOWN
link/ether fe:00:61:80:00:02
[2022-03-08T17:20:19.223039] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue state UP group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:19.223210] Deleted 33: vnet0: <BROADCAST,MULTICAST> mtu 8951 qdisc noop state DOWN group default
link/ether fe:00:61:80:00:02 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:19.238916] 34: vnet1: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast master cloud0 state DOWN group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:19.239404] 34: vnet1: <BROADCAST,MULTICAST> mtu 1500 master cloud0 state DOWN
link/ether fe:00:a9:fe:1f:0a
[2022-03-08T17:20:19.239450] 34: vnet1: <BROADCAST,MULTICAST> mtu 1500 master cloud0 state DOWN
link/ether fe:00:a9:fe:1f:0a
[2022-03-08T17:20:19.241524] 34: vnet1: <BROADCAST,MULTICAST> mtu 1500 master cloud0 state DOWN
link/ether fe:00:a9:fe:1f:0a
[2022-03-08T17:20:19.241606] Deleted 34: vnet1: <BROADCAST,MULTICAST> mtu 1500 master cloud0 state DOWN
link/ether fe:00:a9:fe:1f:0a
[2022-03-08T17:20:19.248933] 8: cloud0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state UP group default
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:19.249089] 8: cloud0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state UP group default
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:19.249240] Deleted 34: vnet1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
link/ether fe:00:a9:fe:1f:0a brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:19.260921] 35: vnet2: <BROADCAST,MULTICAST> mtu 1500 qdisc htb master cloudbr0 state DOWN group default
link/ether fe:00:ed:00:01:c9 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:19.261455] 35: vnet2: <BROADCAST,MULTICAST> mtu 1500 master cloudbr0 state DOWN
link/ether fe:00:ed:00:01:c9
[2022-03-08T17:20:19.261469] 35: vnet2: <BROADCAST,MULTICAST> mtu 1500 master cloudbr0 state DOWN
link/ether fe:00:ed:00:01:c9
[2022-03-08T17:20:19.263556] 35: vnet2: <BROADCAST,MULTICAST> mtu 1500 master cloudbr0 state DOWN
link/ether fe:00:ed:00:01:c9
[2022-03-08T17:20:19.263585] Deleted 35: vnet2: <BROADCAST,MULTICAST> mtu 1500 master cloudbr0 state DOWN
link/ether fe:00:ed:00:01:c9
[2022-03-08T17:20:19.268967] Deleted 35: vnet2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
link/ether fe:00:ed:00:01:c9 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.226898] 8: cloud0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.310747] 30: vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue master cloudbr0 state UNKNOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.311100] 30: vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 master cloudbr0 state UNKNOWN
link/ether 6a:bb:e5:cb:8a:b1
[2022-03-08T17:20:20.311112] Deleted 30: vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 master cloudbr0 state UNKNOWN
link/ether 6a:bb:e5:cb:8a:b1
[2022-03-08T17:20:20.317679] 30: vxlan100: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8951 qdisc noqueue state UNKNOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.317793] 23: cloudbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether 8a:9d:8a:91:9c:6e brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.317844] 23: cloudbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
link/ether 8a:9d:8a:91:9c:6e brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.318482] 30: vxlan100: <BROADCAST,MULTICAST> mtu 8951 qdisc noqueue state DOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.320254] 30: vxlan100: <BROADCAST,MULTICAST> mtu 8951 qdisc noqueue state DOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.320311] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,ALLMULTI,PROMISC,M-DOWN> mtu 8951 qdisc noqueue master brvxlan100-100 state DOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.320843] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,ALLMULTI,PROMISC,M-DOWN> mtu 8951 master brvxlan100-100 state DOWN
link/ether 6a:bb:e5:cb:8a:b1
[2022-03-08T17:20:20.320852] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,ALLMULTI,PROMISC,M-DOWN> mtu 8951 master brvxlan100-100 state DOWN
link/ether 6a:bb:e5:cb:8a:b1
[2022-03-08T17:20:20.322764] 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,ALLMULTI,PROMISC,M-DOWN> mtu 8951 master brvxlan100-100 state DOWN
link/ether 6a:bb:e5:cb:8a:b1
[2022-03-08T17:20:20.322784] Deleted 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,ALLMULTI,PROMISC,M-DOWN> mtu 8951 master brvxlan100-100 state DOWN
link/ether 6a:bb:e5:cb:8a:b1
[2022-03-08T17:20:20.331412] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state UP group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.331502] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state UP group default
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.331546] 32: brvxlan100-100: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state UP group default
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.331561] Deleted 31: vxlan100.100@vxlan100: <BROADCAST,MULTICAST,ALLMULTI,PROMISC,M-DOWN> mtu 8951 qdisc noop state DOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.332299] Deleted 30: vxlan100: <BROADCAST,MULTICAST> mtu 8951 qdisc noop state DOWN group default
link/ether 6a:bb:e5:cb:8a:b1 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.347065] 32: brvxlan100-100: <BROADCAST,MULTICAST> mtu 1500 qdisc noqueue state DOWN group default
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
[2022-03-08T17:20:20.356653] Deleted 32: brvxlan100-100: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
答案1
当服务器空闲时我从未见过这个问题。我还注意到/var/log/messages，vxlan100 接口总是在 CloudStack 关闭虚拟机并删除关联网络接口的同时被删除。知道 CloudStack 有时在接口名称上使用模式匹配，我将接口从 vxlan100 重命名为 ethvxlan0。从那时起它就一直稳定。
当 CloudStack 将其 API 绑定到网络接口时，它仅使用名称与 eth*、bond*、team*、vlan*、em*、p*p*、ens*、eno*、enp* 或 enx 匹配的接口*。我想知道它是否有一个清理例程可以删除与这些模式之一不匹配的所有接口？
名称 vxlan100 从未出现在 CloudStack 日志中。我没有证据证明这是一个 CloudStack bug，但这是我目前最好的猜测。