Docker 容器互联互通的实现方法

网络集群

先创建test-network网络：

docker network create test-network

再运行centos01容器并加入到test-network网络下

docker run -it -P –name centos01 –net test-network centos

centos01容器已经加入在test-network网络下了

centos01加入mynet网络

root@— ~]# docker network connect mynet centos01

查看mynet网络

docker network ls

[root@— ~]# docker network ls
NETWORK ID NAME DRIVER SCOPE
feafa30d4051 bridge bridge local
e8bf4fced9e2 host host local
0096a971fd2c mynet bridge local # 自定义bridge网桥
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\”,
# … 省略代码展示
\”IPAM\”: {
\”Driver\”: \”default\”,
\”Options\”: {},
\”Config\”: [
{
\”Subnet\”: \”192.168.0.0/16\”,
\”Gateway\”: \”192.168.0.1\”
}
]
},
# … 省略代码展示
\”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两个网络连接信息

一个容器两个ip地址

无关代码已省略展示

[root@— ~]# docker inspect cb19
[
{
\”Id\”: \”cb1922b95b9316d129b54f3545fad9729092926e10a1d5517f8928db42706151\”,
\”Created\”: \”2021-10-03T13:39:00.942877668Z\”,
\”Path\”: \”/bin/bash\”,
\”Args\”: [],

# … 省略代码展示

\”NetworkSettings\”: {
# … 省略代码展示
\”Networks\”: {
# 网络连接1 ： mynet
\”mynet\”: {、
# … 省略代码展示
\”Gateway\”: \”192.168.0.1\”,
\”IPAddress\”: \”192.168.0.4\”,
\”MacAddress\”: \”02:42:c0:a8:00:04\”,
},
# 网络连接2 ： test-network
\”test-network\”: {
# … 省略代码展示
\”Gateway\”: \”172.18.0.1\”,
\”IPAddress\”: \”172.18.0.3\”,
\”MacAddress\”: \”02:42:ac:12:00:03\”,
}
}
}
}
]

test-network网卡下的centos01访问mynet网卡下的mynet-centos01、mynet-tomcat01

容器ip和容器名都可以连接

进入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 /]#