064、Weave网络结构分析（2019-04-04 周四）

客官°小女子只卖身不卖艺 2022-01-07 11:53 252阅读 0赞

参考 [https://www.cnblogs.com/CloudMan6/p/7482035.html][https_www.cnblogs.com_CloudMan6_p_7482035.html]

Weave网络使用之前需要执行 eval $(weave env) ，其作用是将后续的docker 命令发送给weave proxy处理，如果需要恢复之前的网络，可以执行 eval $(weave env --restore)

root@host1:~\# eval $(weave env)

root@host1:~\# docker run --name bbox1 -itd busybox

c3414fa41f61583a82aeef4dbbe8f4431f01b063a60696f15ccab35ab68b13f7

root@host1:~\# docker exec bbox1 ip a

1: lo: <LOOPBACK,UP,LOWER\_UP> mtu 65536 qdisc noqueue 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

24: eth0@if25: <BROADCAST,MULTICAST,UP,LOWER\_UP,M-DOWN> mtu 1500 qdisc noqueue

link/ether 02:42:0a:02:2e:02 brd ff:ff:ff:ff:ff:ff

inet 10.2.46.2/24 brd 10.2.46.255 scope global eth0

valid\_lft forever preferred\_lft forever

26: ethwe@if27: <BROADCAST,MULTICAST,UP,LOWER\_UP,M-DOWN> mtu 1376 qdisc noqueue

link/ether aa:f8:77:29:4e:49 brd ff:ff:ff:ff:ff:ff

inet 10.32.0.1/12 brd 10.47.255.255 scope global ethwe

valid\_lft forever preferred\_lft forever

root@host1:~\# ip link

27: vethwepl3962@if26: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1376 qdisc noqueue master weave state UP mode DEFAULT group default

link/ether 3e:45:bc:fd:67:82 brd ff:ff:ff:ff:ff:ff link-netnsid 0

root@host1:~\# brctl show

bridge name bridge id STP enabled interfaces

docker0 8000.0242fbab05c3 no vetha0c66cd

weave 8000.9aac0ef31a18 no vethwe-bridge

vethwepl3962

\# bbox1中的 ethwe@if27 与 host 上的 vethwe13962@if26 是一对 veth pair ， vethwep13962 又挂在了桥 weave下面

root@host1:~\# ip -d link

1: lo: <LOOPBACK,UP,LOWER\_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 promiscuity 0 addrgenmode eui64

2: ens160: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000

link/ether 00:50:56:87:4c:70 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64

3: ens192: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000

link/ether 00:50:56:87:22:32 brd ff:ff:ff:ff:ff:ff promiscuity 0 addrgenmode eui64

4: ens192.10@ens192: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000

link/ether 00:50:56:87:22:32 brd ff:ff:ff:ff:ff:ff promiscuity 0

vlan protocol 802.1Q id 10 <REORDER\_HDR> addrgenmode eui64

5: ens192.20@ens192: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000

link/ether 00:50:56:87:22:32 brd ff:ff:ff:ff:ff:ff promiscuity 0

vlan protocol 802.1Q id 20 <REORDER\_HDR> addrgenmode eui64

6: flannel.1: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1450 qdisc noqueue state UNKNOWN mode DEFAULT group default

link/ether 66:2b:a5:56:0d:c6 brd ff:ff:ff:ff:ff:ff promiscuity 0

vxlan id 1 local 10.12.31.211 dev ens160 srcport 0 0 dstport 8472 nolearning ageing 300 addrgenmode eui64

7: docker0: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default

link/ether 02:42:fb:ab:05:c3 brd ff:ff:ff:ff:ff:ff promiscuity 0

bridge forward\_delay 1500 hello\_time 200 max\_age 2000 ageing\_time 30000 stp\_state 0 priority 32768 vlan\_filtering 0 vlan\_protocol 802.1Q addrgenmode eui64

16: datapath: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1376 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1

link/ether 0e:46:0b:d9:e7:46 brd ff:ff:ff:ff:ff:ff promiscuity 1

openvswitch addrgenmode eui64

18: weave: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1376 qdisc noqueue state UP mode DEFAULT group default qlen 1000

link/ether 9a:ac:0e:f3:1a:18 brd ff:ff:ff:ff:ff:ff promiscuity 0

bridge forward\_delay 1500 hello\_time 200 max\_age 2000 ageing\_time 30000 stp\_state 0 priority 32768 vlan\_filtering 0 vlan\_protocol 802.1Q addrgenmode eui64

19: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/ether 76:8c:4e:05:d9:24 brd ff:ff:ff:ff:ff:ff promiscuity 0

dummy addrgenmode eui64

21: vethwe-datapath@vethwe-bridge: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1376 qdisc noqueue master datapath state UP mode DEFAULT group default

link/ether be:d6:9a:e2:7c:cb brd ff:ff:ff:ff:ff:ff promiscuity 1

veth

openvswitch\_slave addrgenmode eui64

22: vethwe-bridge@vethwe-datapath: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1376 qdisc noqueue master weave state UP mode DEFAULT group default

link/ether e2:ad:6d:b8:8d:c4 brd ff:ff:ff:ff:ff:ff promiscuity 1

veth

bridge\_slave state forwarding priority 32 cost 2 hairpin off guard off root\_block off fastleave off learning on flood on addrgenmode eui64

23: vxlan-6784: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1500 qdisc noqueue master datapath state UNKNOWN mode DEFAULT group default qlen 1000

link/ether da:4e:f2:ed:84:34 brd ff:ff:ff:ff:ff:ff promiscuity 1

vxlan id 0 srcport 0 0 dstport 6784 nolearning ageing 300 udp6zerocsumrx

openvswitch\_slave addrgenmode eui64

25: vetha0c66cd@if24: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1500 qdisc noqueue master docker0 state UP mode DEFAULT group default

link/ether 0a:ea:26:d8:40:3c brd ff:ff:ff:ff:ff:ff link-netnsid 0 promiscuity 1

veth

bridge\_slave state forwarding priority 32 cost 2 hairpin off guard off root\_block off fastleave off learning on flood on addrgenmode eui64

27: vethwepl3962@if26: <BROADCAST,MULTICAST,UP,LOWER\_UP> mtu 1376 qdisc noqueue master weave state UP mode DEFAULT group default

link/ether 3e:45:bc:fd:67:82 brd ff:ff:ff:ff:ff:ff link-netnsid 0 promiscuity 1

veth

bridge\_slave state forwarding priority 32 cost 2 hairpin on guard off root\_block off fastleave off learning on flood on addrgenmode eui64

\# 1、vethwe-bridge@vethwe-datapath 和 vethwe-datapath@vethwe-bridge 是一对 veth pair

\# 2、vethwe-datapath 的父设备（master）是datapath

\# 3、datapath是一个openvswitch

\# 4、vxlan-6784 是vxlan interface ，其master也是datapath，weave主机间通信走的是vxlan

root@host1:~\# docker run --name bbox2 -itd busybox

8ba1a2fd0b8142460adce5c0c84f340f1293c70725703f7553b8eb8f3b559a9b

root@host1:~\# docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

8ba1a2fd0b81 busybox "/w/w sh" 7 seconds ago Up 5 seconds bbox2

c3414fa41f61 busybox "/w/w sh" 7 minutes ago Up 7 minutes bbox1

7e8598656934 weaveworks/weave:2.5.1 "/home/weave/weaver …" 25 hours ago Up 25 hours weave

65fab63189a6 weaveworks/weaveexec:2.5.1 "data-only" 25 hours ago Created weavevolumes-2.5.1

a4d5d7b88819 weaveworks/weavedb:latest "data-only" 25 hours ago Created weavedb

root@host1:~\# docker exec bbox1 hostname

bbox1.weave.local

root@host1:~\# docker exec bbox2 hostname

bbox2.weave.local

root@host1:~\# docker exec bbox1 ping bbox2

PING bbox2 (10.32.0.2): 56 data bytes

64 bytes from 10.32.0.2: seq=0 ttl=64 time=0.097 ms

64 bytes from 10.32.0.2: seq=1 ttl=64 time=0.041 ms

64 bytes from 10.32.0.2: seq=2 ttl=64 time=0.076 ms

root@host1:~\# docker exec bbox1 ip r

default via 10.2.46.1 dev eth0

10.2.46.0/24 dev eth0 scope link src 10.2.46.2

10.32.0.0/12 dev ethwe scope link src 10.32.0.1

224.0.0.0/4 dev ethwe scope link

root@host1:~\# docker exec bbox2 ip r

default via 10.2.46.1 dev eth0

10.2.46.0/24 dev eth0 scope link src 10.2.46.3

10.32.0.0/12 dev ethwe scope link src 10.32.0.2

224.0.0.0/4 dev ethwe scope link

weave网络拓扑如下

![Image 1][]

转载于:https://www.cnblogs.com/www1707/p/10656037.html

[https_www.cnblogs.com_CloudMan6_p_7482035.html]: https://www.cnblogs.com/CloudMan6/p/7482035.html
[Image 1]:

064、Weave网络结构分析（2019-04-04 周四）

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