051、在overlay中运行容器（2019-03-18 周一）

参考https://www.cnblogs.com/CloudMan6/p/7294501.html

 

我们前面创建了overlay网络 ov_net1 ，今天我们运行一个busybox容器并连接到 ov_net1

 

root@host01:~# docker run -itd --name bbox1 --network ov_net1 busybox    #    创建容器bbox1，使用ov_net1网络

e666ab4af792055c63afde141a13286a8e108df2472994a42f22d92e4dbd4f61

root@host01:~# docker exec bbox1 ip r    #    查看容器内路由表

default via 172.18.0.1 dev eth1

10.0.0.0/24 dev eth0 scope link  src 10.0.0.2

172.18.0.0/16 dev eth1 scope link  src 172.18.0.2

root@host01:~# docker exec bbox1 ip a    #    查看容器内网络信息，比我们想象的多了一块网卡，且默认路由走这块网卡

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1

    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

8: eth0@if9: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1450 qdisc noqueue

    link/ether 02:42:0a:00:00:02 brd ff:ff:ff:ff:ff:ff

    inet 10.0.0.2/24 brd 10.0.0.255 scope global eth0

       valid_lft forever preferred_lft forever

11: eth1@if12: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue

    link/ether 02:42:ac:12:00:02 brd ff:ff:ff:ff:ff:ff

    inet 172.18.0.2/16 brd 172.18.255.255 scope global eth1

       valid_lft forever preferred_lft forever

root@host01:~# docker network ls    #    上面使用的网卡是overlay网络自动创建的一种docker网络 docker_gwbridge，专门给使用overlay网络的机器上网用

NETWORK ID          NAME                DRIVER              SCOPE

5f1cb3e7ea16        bridge              bridge              local

467a0c3b1d73        docker_gwbridge     bridge              local

a08d5e1df638        host                host                local

83f08e15caa8        none                null                local

609020e03ff4        ov_net1             overlay             global

root@host01:~# docker network inspect docker_gwbridge

[

    {

        "Name": "docker_gwbridge",

        "Id": "467a0c3b1d73a3b025ff0fd32d87158855573ee7c056060b7967d02096fc626d",

        "Created": "2019-03-18T08:55:22.63696796+08:00",

        "Scope": "local",

        "Driver": "bridge",

        "EnableIPv6": false,

        "IPAM": {

            "Driver": "default",

            "Options": null,

            "Config": [

                {

                    "Subnet": "172.18.0.0/16",

                    "Gateway": "172.18.0.1"

                }

            ]

        },

        "Internal": false,

        "Attachable": false,

        "Ingress": false,

        "ConfigFrom": {

            "Network": ""

        },

        "ConfigOnly": false,

        "Containers": {

            "e666ab4af792055c63afde141a13286a8e108df2472994a42f22d92e4dbd4f61": {

                "Name": "gateway_a8d468c12df8",

                "EndpointID": "d083b420b79f99a4456eccacc8b472e77a29c821cffa726afff63b484323750e",

                "MacAddress": "02:42:ac:12:00:02",

                "IPv4Address": "172.18.0.2/16",

                "IPv6Address": ""

            }

        },

        "Options": {

            "com.docker.network.bridge.enable_icc": "false",

            "com.docker.network.bridge.enable_ip_masquerade": "true",

            "com.docker.network.bridge.name": "docker_gwbridge"

        },

        "Labels": {}

    }

]

root@host01:~# ifconfig docker_gwbridge

docker_gwbridge Link encap:Ethernet  HWaddr 02:42:4d:d7:0f:5f  

          inet addr:172.18.0.1  Bcast:172.18.255.255  Mask:255.255.0.0

          inet6 addr: fe80::42:4dff:fed7:f5f/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:0 errors:0 dropped:0 overruns:0 frame:0

          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0

          RX bytes:0 (0.0 B)  TX bytes:648 (648.0 B)

 

root@host01:~# docker exec bbox1 ping -c 2 www.qq.com

PING www.qq.com (123.151.137.18): 56 data bytes

64 bytes from 123.151.137.18: seq=0 ttl=51 time=5.621 ms

64 bytes from 123.151.137.18: seq=1 ttl=51 time=5.695 ms

 

--- www.qq.com ping statistics ---

2 packets transmitted, 2 packets received, 0% packet loss

round-trip min/avg/max = 5.621/5.658/5.695 ms

 

上面是如何让容器访问外网，下面学习一下如何让外面访问容器

 

和之前方法一样，把网络类型换成 overlay 网络即可

 

docker run -d -p 80:80 --network ov_net1 --name web01 httpd