docker如何在不同的Linux机器上实现容器通信

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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] 3870vincent@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-healthmember 72400c6f5c5691f3 is healthy: got healthy result from http://172.16.247.131:2379member dc0810ee9a06524d is healthy: got healthy result from http://172.16.247.132:2379cluster 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.gzvincent@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-healthmember beb7fd3596aa26eb is healthy: got healthy result from http://192.168.0.109:2379member e6bdc10e37172e00 is healthy: got healthy result from http://192.168.0.107:2379cluster is healthy

然后在node2上执行：

vincent@swarm-worker-1:~/etcd-v3.3.13-linux-amd64$ ./etcdctl cluster-healthmember beb7fd3596aa26eb is healthy: got healthy result from http://192.168.0.109:2379member e6bdc10e37172e00 is healthy: got healthy result from http://192.168.0.107:2379cluster 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 --versionDocker 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 stopsudo /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 lsNETWORK ID          NAME                DRIVER              SCOPEf6acf1d69b7c        bridge              bridge              localc051f46f8a15        host                host                local4caf51fb3438        none                null                local

docker network create -d overlay demo1607f5636b8515d7e06d2f13261d32d8370c72de99ffb688ccdce3f6d8bce898

docker network lsNETWORK ID          NAME                DRIVER              SCOPEf6acf1d69b7c        bridge              bridge              local1607f5636b85        demo                overlay             globalc051f46f8a15        host                host                local4caf51fb3438        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 lsNETWORK ID          NAME                DRIVER              SCOPEe944ecd3d81f        bridge              bridge              local1607f5636b85        demo                overlay             globalca2b5e91ee2f        host                host                localcfb09007c0ce        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 lsCONTAINER ID        IMAGE                 COMMAND                  CREATED              STATUS              PORTS               NAMESc86061fd856c        vincent/ubuntu-base   "/bin/bash -c 'while…"   About a minute ago   Up About a minute

查看test1的ip：

docker exec test1 ifconfigeth0      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 ifconfigeth0      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，小编将为大家推送更多相关知识点的文章，欢迎关注！