docker如何在不同的Linux机器上实现容器通信
这篇文章主要讲解了“docker如何在不同的Linux机器上实现容器通信”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“docker如何在不同的Linux机器上实现容器通信”吧！
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分布式存储有很多工具，今天选择etcd工具，这个是开源的免费分布式存储。
准备实验环境：
docker node1 ip: 192.168.0.109
docker node2 ip: 192.168.0.107
在docker node1 上,下载解压https://github.com/etcd-io/etcd/releases/tag/v3.3.13
vincent@swarm-manager:~/etcd-v3.3.13-linux-amd64$ nohup ./etcd --name docker-node1 --initial-advertise-peer-urls http://192.168.0.109:2380 \ > --listen-peer-urls http://192.168.0.109:2380 \ > --listen-client-urls http://192.168.0.109:2379,http://127.0.0.1:2379 \ > --advertise-client-urls http://192.168.0.109:2379 \ > --initial-cluster-token etcd-cluster \ > --initial-cluster docker-node1=http://192.168.0.109:2380,docker-node2=http://192.168.0.107:2380 \ > --initial-cluster-state new & [1] 3870 vincent@swarm-manager:~/etcd-v3.3.13-linux-amd64$ nohup: ignoring input and appending output to 'nohup.out'
--name 表示这个名字是docker-node1
--initial-advertise-peer-urls 表示本地地址
./etcdctl cluster-health member 72400c6f5c5691f3 is healthy: got healthy result from http://172.16.247.131:2379 member dc0810ee9a06524d is healthy: got healthy result from http://172.16.247.132:2379 cluster is healthy
在docker node2上也去执行：
wget https://github.com/coreos/etcd/releases/download/v3.0.12/etcd-v3.0.12-linux-amd64.tar.gz vincent@swarm-worker-1:~/etcd-v3.3.13-linux-amd64$ ./etcd --name docker-node2 --initial-advertise-peer-urls http://192.168.0.107:2380 \ > --listen-peer-urls http://192.168.0.107:2380 \ > --listen-client-urls http://192.168.0.107:2379,http://127.0.0.1:2379 \ > --advertise-client-urls http://192.168.0.107:2379 \ > --initial-cluster-token etcd-cluster \ > --initial-cluster docker-node1=http://192.168.0.109:2380,docker-node2=http://192.168.0.107:2380 \ > --initial-cluster-state new &
如何确定我们的cluster已经成功建立了：
在node1上执行：
vincent@swarm-manager:~/etcd-v3.3.13-linux-amd64$ ./etcdctl cluster-health member beb7fd3596aa26eb is healthy: got healthy result from http://192.168.0.109:2379 member e6bdc10e37172e00 is healthy: got healthy result from http://192.168.0.107:2379 cluster is healthy
然后在node2上执行：
vincent@swarm-worker-1:~/etcd-v3.3.13-linux-amd64$ ./etcdctl cluster-health member beb7fd3596aa26eb is healthy: got healthy result from http://192.168.0.109:2379 member e6bdc10e37172e00 is healthy: got healthy result from http://192.168.0.107:2379 cluster is healthy
这样我们就在两台机器上搭建了一个分布式存储
重启docker服务
因为我们要让docker知道我们要去使用分布式存储。
在docker-node1上执行：
vincent@swarm-manager:~/etcd-v3.3.13-linux-amd64$ sudo service docker stop [sudo] password for vincent: vincent@swarm-manager:~/etcd-v3.3.13-linux-amd64$ docker --version Docker version 17.12.0-ce, build c97c6d6
然后手动启动docker：
vincent@swarm-manager:~/etcd-v3.3.13-linux-amd64$ sudo /usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock --cluster-store=etcd://192.168.0.109:2379 --cluster-advertise=192.168.0.109:2375& [2] 4153
在docker-node2上执行：
sudo service docker stop sudo /usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock --cluster-store=etcd://192.168.0.109:2379 --cluster-advertise=192.168.0.109:2375&
创建overlay network
在docker-node1上创建一个demo的overlay network
sudo docker network ls NETWORK ID NAME DRIVER SCOPE f6acf1d69b7c bridge bridge local c051f46f8a15 host host local 4caf51fb3438 none null local
docker network create -d overlay demo 1607f5636b8515d7e06d2f13261d32d8370c72de99ffb688ccdce3f6d8bce898
docker network ls NETWORK ID NAME DRIVER SCOPE f6acf1d69b7c bridge bridge local 1607f5636b85 demo overlay global c051f46f8a15 host host local 4caf51fb3438 none null local
查看overlay网络的详细信息：
docker network inspect demo
[
{
"Name": "demo",
"Id": "1607f5636b8515d7e06d2f13261d32d8370c72de99ffb688ccdce3f6d8bce898",
"Created": "2019-07-01T07:52:43.137469208-07:00",
"Scope": "global",
"Driver": "overlay",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "10.0.0.0/24",
"Gateway": "10.0.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {},
"Options": {},
"Labels": {}
}
]我们会看到在node2上，这个demo的overlay network会被同步创建:
docker network ls NETWORK ID NAME DRIVER SCOPE e944ecd3d81f bridge bridge local 1607f5636b85 demo overlay global ca2b5e91ee2f host host local cfb09007c0ce none null local
创建连接demo网络的容器
在docker-node1上创建容器：
docker run -d --name test1 --network demo vincent/ubuntu-base /bin/bash -c "while true; do sleep 3600; done" c86061fd856cca0d157cc602cd9b98edd9f0fa4db9a26aa77ae2b054d6d804f1
docker container ls CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES c86061fd856c vincent/ubuntu-base "/bin/bash -c 'while…" About a minute ago Up About a minute
查看test1的ip：
docker exec test1 ifconfig eth0 Link encap:Ethernet HWaddr 02:42:0a:00:00:02 inet addr:10.0.0.2 Bcast:10.0.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1450 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) eth2 Link encap:Ethernet HWaddr 02:42:ac:12:00:02 inet addr:172.18.0.2 Bcast:172.18.255.255 Mask:255.255.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:16 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1308 (1.3 KB) TX bytes:0 (0.0 B) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
在docker-node2上新建容器test2：
docker run -d --name test2 --network demo vincent/ubuntu-base /bin/bash -c "while true; do sleep 3600; done" 31f87913be02db7a8033b407c559a7a213445384d735239ff6504318c5077e46
在docker-node2上测试连通性
docker exec -it test2 ifconfig eth0 Link encap:Ethernet HWaddr 02:42:0a:00:00:03 inet addr:10.0.0.3 Bcast:10.0.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1450 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) eth2 Link encap:Ethernet HWaddr 02:42:ac:12:00:02 inet addr:172.18.0.2 Bcast:172.18.255.255 Mask:255.255.0.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:16 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1308 (1.3 KB) TX bytes:0 (0.0 B) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
这两个container之间可以连通。
感谢各位的阅读，以上就是“docker如何在不同的Linux机器上实现容器通信”的内容了，经过本文的学习后，相信大家对docker如何在不同的Linux机器上实现容器通信这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是创新互联，小编将为大家推送更多相关知识点的文章，欢迎关注！
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