Docker 记录 ------ 使用weave实现docker跨网段通信

参考博客

 

(1)我们使用weave虚拟工具配置，完成两台主机上的DDS接收端和发送端的实时通信。首先保证两台宿主机在同一网段下，这里我的主机（简称c1），皓淳主机（简称c2）的ip地址分别是192.168.1.241和192.168.1.168

(2)weave的安装过程：首先我们完成对6783接口的处理：sudo ufw allow 6783

(3)安装weave：首先将weave文件移动到/usr/loacl/bin，然后执行：chmod a+x /usr/local/bin/weave。之后执行：sudo weave launch

latest: Pulling from weaveworks/weave
21c83c524219: Pull complete
02ec35b6f627: Pull complete
c40f141adde9: Pull complete
a63db11be476: Pull complete
e8d3a1b4fb09: Pull complete
Digest: sha256:a4f1dd7b4fcd3a391c165f1ab20c5f72330c22fe0918c899be67763717bb2a28
Status: Downloaded newer image for weaveworks/weave:latest
docker.io/weaveworks/weave:latest
latest: Pulling from weaveworks/weavedb
a53a673d456f: Pull complete
Digest: sha256:69451a2121b288e09329241de9401af1aeddd05d93f145764bbb735a4ea05c76
Status: Downloaded newer image for weaveworks/weavedb:latest
docker.io/weaveworks/weavedb:latest
Unable to find image 'weaveworks/weaveexec:latest' locally
latest: Pulling from weaveworks/weaveexec
21c83c524219: Already exists
02ec35b6f627: Already exists
c40f141adde9: Already exists
a63db11be476: Already exists
e8d3a1b4fb09: Already exists
a32777c54c9c: Pull complete
62ae831e3996: Pull complete
4dce36b0e389: Pull complete
6f3464413eb4: Pull complete
Digest: sha256:847cdb3eb0d38ff6590b6066ec0f6b02ced47c1d76a78f3f93d8ca6145aecaa5
Status: Downloaded newer image for weaveworks/weaveexec:latest
46fbc8bf317be2515ccd93892a14de1c7709bc32f16762c30d6329c38f4f5045

(4)观察docker的运行内容：sudo docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
46fbc8bf317b weaveworks/weave:latest "/home/weave/weaver …" 12 seconds ago Up 11 seconds weave
e9f579397e8d weaveworks/weaveexec:latest "data-only" 12 seconds ago Created weavevolumes-latest
0aff14057936 weaveworks/weavedb:latest "data-only" 12 seconds ago Created weavedb

(5)观察docker镜像是否齐全：sudo docker images

REPOSITORY TAG IMAGE ID CREATED SIZE
10.71.22.141:5000/dds latest 1d5dcc0655e7 28 hours ago 807MB
weaveworks/weaveexec latest e8d7a2b95ca2 17 months ago 71.2MB
weaveworks/weave latest c5f94c391f12 17 months ago 61.2MB
weaveworks/weavedb latest 19661b1dbf28 18 months ago 698B

(6)观察brctl，但是这里没有安装相关功能： sudo brctl show

(7)观察weave的ip：sudo ifconfig weave

weave: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1376
inet6 fe80::cca5:c9ff:feba:a664 prefixlen 64 scopeid 0x20<link>
ether ce:a5:c9:ba:a6:64 txqueuelen 1000 (Ethernet)
RX packets 42 bytes 4910 (4.9 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 22 bytes 2897 (2.8 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

(8)观察docker的network：sudo docker network ls

NETWORK ID NAME DRIVER SCOPE
41ff08ec42c4 bridge bridge local
bf346cea5356 host host local
312a84361715 none null local
8264adb53fd2 weave weavemesh local

(9)在c1上进行对c2的weave功能的连接：
sudo weave connect 192.168.1.168
在c2上进行对c1的weave功能的连接：
sudo weave connect 192.168.1.241

(10)开始run需要的DDS镜像，注意到这里添加了参数"--net=none"使得运行的容器不使用docker自动分配的ip，实用意义不明，但是加上是通的，故保留。
sudo docker run -itd --net=none 10.71.22.141:5000/dds
结果会返回该容器的container id

(11)查看docker是否正常运行：sudo docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a4d9495dd5f7 10.71.22.141:5000/dds "/bin/bash" 4 seconds ago Up 4 seconds compassionate_wright
46fbc8bf317b weaveworks/weave:latest "/home/weave/weaver …" 3 minutes ago Up 3 minutes weave

(12)这步较为关键，要使用weave工具命令该容器在c1上使用192.168.10.11/24这个地址:
sudo weave attach 192.168.10.20/24 a4d9495dd5f7

(13)查看weave的相关状态：sudo weave version
weave script unreleased
weave git-34de0b10a69c

sudo weave status

Version: git-34de0b10a69c (up to date; next check at 2022/07/30 17:26:33)

Service: router
Protocol: weave 1..2
Name: ce:a5:c9:ba:a6:64(yhc-virtual-machine)
Encryption: disabled
PeerDiscovery: enabled
Targets: 1
Connections: 2 (2 established)
Peers: 3 (with 6 established connections)
TrustedSubnets: none

Service: ipam
Status: all IP ranges owned by unreachable peers - use 'rmpeer' if they are dead
Range: 10.32.0.0/12
DefaultSubnet: 10.32.0.0/12

Service: dns
Domain: weave.local.
Upstream: 127.0.0.53
TTL: 1
Entries: 0

Service: proxy
Address: unix:///var/run/weave/weave.sock

Service: plugin (legacy)
DriverName: weave

(14)执行该容器：sudo docker exec -it a4d /bin/bash。并在进入后首先查看是否ip地址正确：（这里是c2）

root@a4d9495dd5f7:/# ifconfig
ethwe: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1376
inet 192.168.10.20 netmask 255.255.255.0 broadcast 192.168.10.255
ether f2:f0:9d:22:f9:90 txqueuelen 0 (Ethernet)
RX packets 25 bytes 3142 (3.1 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1 bytes 42 (42.0 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
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

(15)进入测试目录：cd home/dds/Debug,执行：./test_Recv.