利用etcd实现docker跨主机通信

etcd实现分布是存储，然后让通信等数据共享。

 

步骤：

安装etcd

docker重启加载etcd参数

建立docker overlay网络验证跨主机通信

 

准备：两台安装了docker 的linux主机

 

安装etcd

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在docker-node1上

 

ubuntu@docker-node1:~$ wget https://github.com/coreos/etcd/releases/download/v3.0.12/etcd-v3.0.12-linux-amd64.tar.gz

ubuntu@docker-node1:~$ tar zxvf etcd-v3.0.12-linux-amd64.tar.gz

ubuntu@docker-node1:~$ cd etcd-v3.0.12-linux-amd64

ubuntu@docker-node1:~$ nohup ./etcd --name docker-node1 --initial-advertise-peer-urls http://192.168.205.10:2380 \

--listen-peer-urls http://192.168.205.10:2380 \

--listen-client-urls http://192.168.205.10:2379,http://127.0.0.1:2379 \

--advertise-client-urls http://192.168.205.10:2379 \

--initial-cluster-token etcd-cluster \

--initial-cluster docker-node1=http://192.168.205.10:2380,docker-node2=http://192.168.205.11:2380 \

--initial-cluster-state new&

 

在docker-node2上

 

ubuntu@docker-node2:~$ wget https://github.com/coreos/etcd/releases/download/v3.0.12/etcd-v3.0.12-linux-amd64.tar.gz

ubuntu@docker-node2:~$ tar zxvf etcd-v3.0.12-linux-amd64.tar.gz

ubuntu@docker-node2:~$ cd etcd-v3.0.12-linux-amd64/

ubuntu@docker-node2:~$ nohup ./etcd --name docker-node2 --initial-advertise-peer-urls http://192.168.205.11:2380 \

--listen-peer-urls http://192.168.205.11:2380 \

--listen-client-urls http://192.168.205.11:2379,http://127.0.0.1:2379 \

--advertise-client-urls http://192.168.205.11:2379 \

--initial-cluster-token etcd-cluster \

--initial-cluster docker-node1=http://192.168.205.10:2380,docker-node2=http://192.168.205.11:2380 \

--initial-cluster-state new&

 

 

重启docker加载etcd

 

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检查cluster状态     ubuntu@docker-node2:~/etcd-v3.0.12-linux-amd64$ ./etcdctl cluster-health member 21eca106efe4caee is healthy: got healthy result from http://192.168.205.10:2379 member 8614974c83d1cc6d is healthy: got healthy result from http://192.168.205.11:2379 cluster is healthy     ## 重启docker服务     在docker-node1上   $ sudo service docker stop $ sudo /usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock --cluster-store=etcd://192.168.205.10:2379 --cluster-advertise=192.168.205.10:2375&     在docker-node2上     $ sudo service docker stop $ sudo /usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock --cluster-store=etcd://192.168.205.11:2379 --cluster-advertise=192.168.205.11:2375&

　　

创建docker overlay网络验证通信

 

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在docker-node1上创建一个demo的overlay network   ubuntu@docker-node1:~$ sudo docker network ls NETWORK ID          NAME                DRIVER              SCOPE 0e7bef3f143a        bridge              bridge              local a5c7daf62325        host                host                local 3198cae88ab4        none                null                local ubuntu@docker-node1:~$ sudo docker network create -d overlay demo 3d430f3338a2c3496e9edeccc880f0a7affa06522b4249497ef6c4cd6571eaa9 ubuntu@docker-node1:~$ sudo docker network ls NETWORK ID          NAME                DRIVER              SCOPE 0e7bef3f143a        bridge              bridge              local 3d430f3338a2        demo                overlay             global a5c7daf62325        host                host                local 3198cae88ab4        none                null                local<br><br>在docker-node2上也看到一个demo的overlay networkubuntu@docker-node2:~$ sudo docker network ls NETWORK ID          NAME                DRIVER              SCOPE 0e7bef3f143a        bridge              bridge              local 3d430f3338a2        demo                overlay             global a5c7daf62325        host                host                local 3198cae88ab4        none                null                local