Docker跨主机网络联通之etcd实现
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搭建ETCD集群
查看NODE1机器IP，并启动ETCD
ubuntu@docker-node1:~$ ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450
inet 172.16.1.15 netmask 255.255.255.0 broadcast 172.16.1.255
inet6 fe80::f816:3eff:fe33:11a8 prefixlen 64 scopeid 0x20<link>
ether fa:16:3e:33:11:a8 txqueuelen 1000 (Ethernet)
RX packets 11765471 bytes 10784121723 (10.0 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 10697881 bytes 7319647448 (6.8 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ubuntu@docker-node1:~$ wget http://192.168.9.251:9000/software/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://172.16.1.15:2380 --listen-peer-urls http://172.16.1.15:2380 --listen-client-urls http://172.16.1.15:2379,http://127.0.0.1:2379 --advertise-client-urls http://172.16.1.15:2379 --initial-cluster-token etcd-cluster --initial-cluster docker-node1=http://172.16.1.15:2380,docker-node2=http://172.16.1.36:2380 --initial-cluster-state new&
查看NODE2机器IP、启动ETCD,并ETCD健康检查
ubuntu@docker-node2:~$ ifconfig eth0
eth0 Link encap:Ethernet HWaddr fa:16:3e:ec:fc:12
inet addr:172.16.1.36 Bcast:172.16.1.255 Mask:255.255.255.0
inet6 addr: fe80::f816:3eff:feec:fc12/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1450 Metric:1
RX packets:18479729 errors:0 dropped:0 overruns:0 frame:0
TX packets:16843586 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:7717777368 (7.7 GB) TX bytes:6506041953 (6.5 GB)
ubuntu@docker-node2:~$ wget http://192.168.9.251:9000/software/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://172.16.1.36:2380 --listen-peer-urls http://172.16.1.36:2380 --listen-client-urls http://172.16.1.36:2379,http://127.0.0.1:2379 --advertise-client-urls http://172.16.1.36:2379 --initial-cluster-token etcd-cluster --initial-cluster docker-node1=http://172.16.1.15:2380,docker-node2=http://172.16.1.36:2380 --initial-cluster-state new&
ubuntu@docker-node2:~/etcd-v3.0.12-linux-amd64$ ./etcdctl cluster-health
member cd18d4410e46bbd1 is healthy: got healthy result from http://172.16.1.36:2379
member d05d0bbb1534c7ee is healthy: got healthy result from http://172.16.1.15:2379
cluster is healthy
修改docker配置文件支持etcd，重启docker
查看配置文件位于哪里
systemctl show --property=FragmentPath docker
编辑配置文件内容，接收所有IP请求
sudo vim /usr/lib/systemd/system/docker.service
修改配置ExecStart ，在后面追加 --cluster-store=etcd://172.16.1.36:2379 --cluster-advertise=172.16.1.36:2375
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix:///var/run/docker.sock --cluster-store=etcd://172.16.1.36:2379 --cluster-advertise=172.16.1.36:2375
重新加载配置文件，重启DOCKER DAEMON
sudo systemctl daemon-reload
sudo systemctl restart docker
两台服务器都需要上述操作
创建全局网络，并在网络中添加容器
创建全局网络
[email protected]:~$ sudo docker network ls
NETWORK ID NAME DRIVER SCOPE
0e7bef3f143a bridge bridge local
a5c7daf62325 host host local
3198cae88ab4 none null local
[email protected]:~$ sudo docker network create -d overlay demo
3d430f3338a2c3496e9edeccc880f0a7affa06522b4249497ef6c4cd6571eaa9
[email protected]:~$ 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
[email protected]:~$ sudo docker network inspect demo
[
{
"Name": "demo",
"Id": "3d430f3338a2c3496e9edeccc880f0a7affa06522b4249497ef6c4cd6571eaa9",
"Scope": "global",
"Driver": "overlay",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "10.0.0.0/24",
"Gateway": "10.0.0.1/24"
}
]
},
"Internal": false,
"Containers": {},
"Options": {},
"Labels": {}
}
]
添加容器
在node1上添加cli1.yaml,内容如下，网络指定为上面创建的全局网络
version: ‘2‘
services:
cli:
container_name: cli
image: hyperledger/fabric-tools:raft
tty: true
working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
networks:
default:
external:
name: demo
在node2上添加cli2.yaml,内容如下，网络指定为上面创建的全局网络
version: ‘2‘
services:
cli2:
container_name: cli2
image: hyperledger/fabric-tools:raft
tty: true
working_dir: /opt/gopath/src/github.com/hyperledger/fabric/peer
networks:
default:
external:
name: demo
利用docker-compose分别启动两个节点。
docker-compose -f cli1.yaml up -d
docker-compose -f cli2.yaml up -d
查看demo网络详情，可以看到两个容器已经加入同一网络。
[email protected]node1:~$ sudo docker network inspect demo
[
{
"Name": "demo",
"Id": "9dc055222c85e1ca09db6d66910c1dba27d342e070f1ca6f976533071344e939",
"Created": "2018-05-23T10:44:36.454709725+08:00",
"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,
"Containers": {
"21da2d4d9b55e60b4636d7d0a9e7513b47784be55990ba46288a29a527ba470e": {
"Name": "cli",
"EndpointID": "411418d95a303f0452415e0481fc11ac41d6755e9680e042042f2afd93f62cca",
"MacAddress": "02:42:0a:00:00:03",
"IPv4Address": "10.0.0.3/24",
"IPv6Address": ""
},
"ep-6725169b38e657bd6cef4d1b1cdf530575b7caf78f78a037d21c65eb2c90e6ab": {
"Name": "cli2",
"EndpointID": "6725169b38e657bd6cef4d1b1cdf530575b7caf78f78a037d21c65eb2c90e6ab",
"MacAddress": "02:42:0a:00:00:02",
"IPv4Address": "10.0.0.2/24",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {}
}
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