docker network bridge模式,默认(一)

查看docker当前创建的网络

[root@localhost claroja]# docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
3c145f070fd7        bridge              bridge              local
f0428b4ac8ec        host                host                local
42c2aaaeac08        none                null                local

当创建容器时,默认都连接bridge局域网中,使用docker inspect bridge查看该模式的详细信息,containers为空,说明没有容器连接到此网络
缺点是不能通过DNS访问

[root@localhost claroja]# docker inspect bridge
[
    {
    
    
        "Name": "bridge",
        "Id": "3c145f070fd74066ccdd08e447ebe511e698efa991842d14a5514233cb53ff72",
        "Created": "2021-03-13T22:09:48.775941917-05:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
    
    
            "Driver": "default",
            "Options": null,
            "Config": [
                {
    
    
                    "Subnet": "172.17.0.0/16",
                    "Gateway": "172.17.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
    
    
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
    
    },
        "Options": {
    
    
            "com.docker.network.bridge.default_bridge": "true",
            "com.docker.network.bridge.enable_icc": "true",
            "com.docker.network.bridge.enable_ip_masquerade": "true",
            "com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
            "com.docker.network.bridge.name": "docker0",
            "com.docker.network.driver.mtu": "1500"
        },
        "Labels": {
    
    }
    }
]

创建容器test1

[root@localhost claroja]# docker container run --name test1 -dit centos /bin/bash
d0e15b7f6fd49f0d12d03edeffb8b6f844f722c97c78e7cba2ed4f7d8c8a89ed

创建容器test2

[root@localhost claroja]# docker container run --name test2 -dit centos /bin/bash
fb6ff2267a7f6f4e7fe31be9e8d016217459c74867d0529d5ed1867b6f76acc0

进入容器test1

[root@localhost claroja]# docker attach test1
[root@d0e15b7f6fd4 /]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
12: eth0@if13: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
    link/ether 02:42:ac:11:00:03 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.17.0.2/16 brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever

进入容器test2,ping test1的ip,可以ping通 说明在同一个网段里

[root@localhost claroja]# docker attach test2
[root@fb6ff2267a7f /]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
10: eth0@if11: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
    link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.17.0.3/16 brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever

[root@fb6ff2267a7f /]# ping 172.17.0.2
PING 172.17.0.2 (172.17.0.2) 56(84) bytes of data.
64 bytes from 172.17.0.2: icmp_seq=1 ttl=64 time=0.062 ms
64 bytes from 172.17.0.2: icmp_seq=2 ttl=64 time=0.051 ms

使用docker inspect bridge查看bridge模式下的状态,“Containers”,可查看当前容器的ip

[root@localhost claroja]# docker inspect bridge
[
    {
    
    
        "Name": "bridge",
        "Id": "3c145f070fd74066ccdd08e447ebe511e698efa991842d14a5514233cb53ff72",
        "Created": "2021-03-13T22:09:48.775941917-05:00",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
    
    
            "Driver": "default",
            "Options": null,
            "Config": [
                {
    
    
                    "Subnet": "172.17.0.0/16",
                    "Gateway": "172.17.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
    
    
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
    
    
            "d0e15b7f6fd49f0d12d03edeffb8b6f844f722c97c78e7cba2ed4f7d8c8a89ed": {
    
    
                "Name": "test1",
                "EndpointID": "da771a11c5fc38be893f5b8de85007cfe139c00d25f6cedc08a7d2051232d850",
                "MacAddress": "02:42:ac:11:00:02",
                "IPv4Address": "172.17.0.2/16",
                "IPv6Address": ""
            },
            "fb6ff2267a7f6f4e7fe31be9e8d016217459c74867d0529d5ed1867b6f76acc0": {
    
    
                "Name": "test2",
                "EndpointID": "d5bca6d5d219c132d5d93ed06fcc2330b23a7674391f1e04a4f1233d15e5db7d",
                "MacAddress": "02:42:ac:11:00:03",
                "IPv4Address": "172.17.0.3/16",
                "IPv6Address": ""
            }
        },
        "Options": {
    
    
            "com.docker.network.bridge.default_bridge": "true",
            "com.docker.network.bridge.enable_icc": "true",
            "com.docker.network.bridge.enable_ip_masquerade": "true",
            "com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
            "com.docker.network.bridge.name": "docker0",
            "com.docker.network.driver.mtu": "1500"
        },
        "Labels": {
    
    }
    }
]

参考:
https://blog.51cto.com/shyln/2133385