docker容器间通信

现在在我们的docker中已经有了三个容器，分别是DB/API/UI三个容器，三个容器间肯定是要进行互相通信的

可以查看docker的官方文档，https://docs.docker.com/engine/userguide/networking/#the-default-bridge-network

当您安装Docker时，它会自动创建三个网络。您可以使用以下docker network ls命令列出这些网络：

docker@default:~$ docker network ls
NETWORK ID NAME DRIVER SCOPE
78763a12b144 bridge bridge local
7da828c0e77b host host local
af3045e58ef6 none null local

Docker内置这三个网络。运行容器时，您可以使用该--network标志来指定容器应连接到哪些网络。

通过命令创建了两个容器

docker run -d --name mongo-docker-dev --restart=always -p :  -v /home/docker/mongo/dev/data/configdb:/data/configdb  -v/home/docker/mongo/dev/data/db:/data/db mongo

docker run -d --name person-blog-dev-backend --restart=always -p : person-blog-dev-backend

当创建了两个容器后，通过命令可以查看到所以容器的网络配置信息

docker@default:~$ docker network inspect bridge

[

    {

        "Name": "bridge",

        "Id": "78763a12b144233dea7b7695490567dcace526019b8268f11df019aab7c9340a",

        "Created": "2017-04-27T02:06:16.288209903Z",

        "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,

        "Containers": {

            "b93993405c432c276d43220abebc8e3529a49dc42afa4a7ee5afdb139774b973": {

                "Name": "person-blog-dev-backend",

                "EndpointID": "20ce486bbd7756260948160ea93cf69f5a9a8dd9809acf89a35cc20d07b9377c",

                "MacAddress": "02:42:ac:11:00:03",

                "IPv4Address": "172.17.0.3/16",

                "IPv6Address": ""

            },

            "f107144cf3cb412f69dc36dd11601b592b220601a6dce549be8e2ea781b53522": {

                "Name": "mongo-docker-dev",

                "EndpointID": "6b852692948c3c8d83979c33afe3e4c97055f07e74660e20cad612e86984d0c2",

                "MacAddress": "02:42:ac:11:00:02",

                "IPv4Address": "172.17.0.2/16",

                "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": ""

        },

        "Labels": {}

    }

]

docker@default:~$

可以看到，两个容器都在同一个网段中，应该也是可以互相通信的，使用命令，这里是使用backend去ping mongodb容器

docker@default:~$ docker exec -it person-blog-dev-backend bash

root@b93993405c43:/user/src/app# ping -w3 172.17.0.2

PING 172.17.0.2 (172.17.0.2):  data bytes

 bytes from 172.17.0.2: icmp_seq= ttl= time=0.080 ms

 bytes from 172.17.0.2: icmp_seq= ttl= time=0.091 ms

 bytes from 172.17.0.2: icmp_seq= ttl= time=0.146 ms

--- 172.17.0.2 ping statistics ---

 packets transmitted,  packets received, % packet loss

round-trip min/avg/max/stddev = 0.080/0.106/0.146/0.029 ms

root@b93993405c43:/user/src/app#

巴特西

docker容器间通信

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