目錄
- 網絡集群
- 查看mynet網絡
- 查看centos01的容器信息
- test-network網卡下的centos01訪問mynet網卡下的mynet-centos01、mynet-tomcat01
- 容器ip和容器名都可以連接
- 結論
本文講解不同網絡下的容器可以通過加入同一個docker網絡，來訪問該docker網絡下的容器，并且既可以通過容器ip也可以通過容器名連接，非常方便。
上篇講到創建自定義網絡，我創建了 mynet 網絡，并指定了網關和子網地址。在上篇結尾呢，我拋出了一個問題：其它網絡下的容器可以直接訪問mynet網絡下的容器嗎？今天就讓我們一塊看下怎么實現容器互聯。
其它網絡下的容器加入mynet網絡，實現一個容器兩個ip地址
網絡集群
- 先創建
test-network網絡：
docker network create test-network
- 再運行
centos01容器并加入到test-network網絡下
docker run -it -P --name centos01 --net test-network centos
centos01容器已經加入在test-network網絡下了
centos01加入mynet網絡
root@--- ~]# docker network connect mynet centos01
查看mynet網絡
docker network ls
[root@--- ~]# docker network ls NETWORK ID NAME DRIVER SCOPE feafa30d4051 bridge bridge local e8bf4fced9e2 host host local 0096a971fd2c mynet bridge local # 自定義bridge網橋 6263db0933b9 none null local 799426d70aa2 test-network bridge local
docker network inspect 0096
[root@--- ~]# docker network inspect 0096
[
{
"Name": "mynet",
"Id": "0096a971fd2c66400e53cbae5e53eceedc2f90d5685917e9534640a3535c0ef1",
"Created": "2021-10-04T10:18:09.113847736+08:00",
# ... 省略代碼展示
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "192.168.0.0/16",
"Gateway": "192.168.0.1"
}
]
},
# ... 省略代碼展示
"Containers": {
"2fac920eebd505794c4a27ef4efdf531d32805e8663bded93a473bd28236bc27": {
"Name": "mynet-centos01",
"EndpointID": "3aff075...",
"MacAddress": "02:42:c0:a8:00:02",
"IPv4Address": "192.168.0.2/16",
"IPv6Address": ""
},
"3dceda051252b6970fe2156bac7710ba6489a97aac68c49b1c85a2f130d0556f": {
"Name": "mynet-tomcat01",
"EndpointID": "9f52b19...",
"MacAddress": "02:42:c0:a8:00:03",
"IPv4Address": "192.168.0.3/16",
"IPv6Address": ""
},
"cb1922b95b9316d129b54f3545fad9729092926e10a1d5517f8928db42706151": {
"Name": "centos01",
"EndpointID": "0ba2107...",
"MacAddress": "02:42:c0:a8:00:04",
"IPv4Address": "192.168.0.4/16", # 新加入的centos01容器
"IPv6Address": ""
}
},
"Options": {},
"Labels": {}
}
]
查看centos01的容器信息
可以看到Networks下面存在mynet、test-network兩個網絡連接信息
一個容器兩個ip地址
無關代碼已省略展示
[root@--- ~]# docker inspect cb19
[
{
"Id": "cb1922b95b9316d129b54f3545fad9729092926e10a1d5517f8928db42706151",
"Created": "2021-10-03T13:39:00.942877668Z",
"Path": "/bin/bash",
"Args": [],
# ... 省略代碼展示
"NetworkSettings": {
# ... 省略代碼展示
"Networks": {
# 網絡連接1 ： mynet
"mynet": {、
# ... 省略代碼展示
"Gateway": "192.168.0.1",
"IPAddress": "192.168.0.4",
"MacAddress": "02:42:c0:a8:00:04",
},
# 網絡連接2 ： test-network
"test-network": {
# ... 省略代碼展示
"Gateway": "172.18.0.1",
"IPAddress": "172.18.0.3",
"MacAddress": "02:42:ac:12:00:03",
}
}
}
}
]
test-network網卡下的centos01訪問mynet網卡下的mynet-centos01、mynet-tomcat01
容器ip和容器名都可以連接
進入centos01容器
[root@--- ~]# docker exec -it cb19 /bin/bash
mynet-tomcat01 容器的IP是: 192.168.0.3
ping mynet-tomcat01 容器的IP
[root@cb1922b95b93 /]# ping 192.168.0.3 PING 192.168.0.3 (192.168.0.3) 56(84) bytes of data. 64 bytes from 192.168.0.3: icmp_seq=1 ttl=64 time=0.186 ms ^C --- 192.168.0.3 ping statistics --- 7 packets transmitted, 7 received, 0% packet loss, time 6000ms rtt min/avg/max/mdev = 0.090/0.127/0.186/0.029 ms
直接ping 容器名 mynet-centos01 mynet-tomcat01
[root@cb1922b95b93 /]# ping mynet-centos01 PING mynet-centos01 (192.168.0.2) 56(84) bytes of data. 64 bytes from mynet-centos01.mynet (192.168.0.2): icmp_seq=1 ttl=64 time=0.105 ms ^C --- mynet-centos01 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2001ms rtt min/avg/max/mdev = 0.105/0.116/0.130/0.013 ms [root@cb1922b95b93 /]# ping mynet-tomcat01 PING mynet-tomcat01 (192.168.0.3) 56(84) bytes of data. 64 bytes from mynet-tomcat01.mynet (192.168.0.3): icmp_seq=1 ttl=64 time=0.085 ms ^C --- mynet-tomcat01 ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1001ms rtt min/avg/max/mdev = 0.085/0.093/0.102/0.012 ms [root@cb1922b95b93 /]#
結論
其它網絡下的容器可以通過加入docker網絡，來訪問該docker網絡下的容器，并且既可以通過容器ip也可以通過容器名連接，非常方便。docker0十分強大
