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使用docker compose在2个docker容器之间 Build 连接

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我在同一个网桥“restorecms_default”上运行了2个docker容器“restorecms_facade_1”（外观服务）和“restorecms_identity_1”（身份服务） .

我在docker compose文件中为身份服务映像指定了主机名“hostname：identity-srv”

Facade服务暴露了5000端口，它接受我的graphQL请求 . 此Facite服务将委托请求到端口50051上运行的身份服务（dns名称'identity-srv'），但请求当前正在服务外观上超时 .

我的码头集装箱和新娘网络详情如下 .

我甚至无法从门面服务ping到身份服务（但反过来也是可能的） .

我在这里遗漏了什么或者我是否需要在外观服务上添加任何内容以便连接到身份服务？

Docker ps：

akumar@client3 /restore $ docker ps
CONTAINER ID        IMAGE                               COMMAND                  CREATED             STATUS                    PORTS                                                NAMES
4a8854ce4876        xxx/facade-srv          "node lib/index.js"      41 minutes ago      Up 41 minutes             0.0.0.0:5000->5000/tcp                               restorecms_facade_1
00f1f00ae2a6        xxx/identity-srv        "node service.js"        41 minutes ago      Up 41 minutes (healthy)   0.0.0.0:50051->50051/tcp                             restorecms_identity_1

Docker检查：

akumar@client3 /restore/identity-srv-TypeScript $ docker inspect restorecms_default 
[
    {
        "Name": "restorecms_default",
        "Id": "102358eab67884f7d39b78fd0bcf1050499d3dc667eddab5e15086633185837d",
        "Created": "2017-06-08T10:40:59.672964582+02:00",
        "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": true,
        "Ingress": false,
        "Containers": {
            "00f1f00ae2a64f489a530a63a9fb57711618d5e67769b739db514b5f20b73d36": {
                "Name": "restorecms_identity_1",
                "EndpointID": "d005cdff65479817bf769e4b60a18769c40d9d9cae396f3c735c2e497d6e08a4",
                "MacAddress": "02:42:ac:12:00:09",
                "IPv4Address": "172.18.0.9/16",
                "IPv6Address": ""
            },
            "4a8854ce487698149072c224378f697e9309e32649f6010d2d8c4cc4f0bb3f42": {
                "Name": "restorecms_facade_1",
                "EndpointID": "2509c8e1444d27cbe8a3188412fcbfb1aab103ec2366c22f3ad614c684ef87ab",
                "MacAddress": "02:42:ac:12:00:0a",
                "IPv4Address": "172.18.0.10/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {
            "com.docker.compose.network": "default",
            "com.docker.compose.project": "restorecms"
        }
    }
]

主机名和ping：

root@identity-srv:/# cat /etc/hostname 
identity-srv

root@identity-srv:/# ping 4a8854ce4876
PING 4a8854ce4876 (172.18.0.10): 48 data bytes
56 bytes from 172.18.0.10: icmp_seq=0 ttl=64 time=0.241 ms
56 bytes from 172.18.0.10: icmp_seq=1 ttl=64 time=0.149 ms
56 bytes from 172.18.0.10: icmp_seq=2 ttl=64 time=0.165 ms
^C--- 4a8854ce4876 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.149/0.185/0.241/0.040 ms


root@4a8854ce4876:/# cat /etc/hostname 
4a8854ce4876

root@4a8854ce4876:/# ping identity-srv
ping: unknown host

我当前的docker-compose.yml（用于身份和外观服务）配置如下：

identity:
    hostname: identity-srv
    image: xxx/identity-srv
    ports:
      - "50051:50051"
    depends_on:
      arangodb:
        condition: service_healthy
    links:
      - arangodb
      - kafka
    healthcheck:
      test: "exit 0"

  # Facade service
  facade:
    image: xxx/facade-srv
    ports:
      - "5000:5000"
    depends_on:
      identity:
        condition: service_healthy
      #resource:
      #  condition: service_healthy
    links:
      - identity
      - kafka
      - elasticsearch
      - arangodb
      - redis
docker docker-compose docker-networking

2 回答

  • 0

    主机名仅设置主机名"inside"容器 . 如果要从另一个ping它，则需要使用在 links 部分中使用的别名（默认为服务名称） .

    ping identity 如果你想使用 identity-srv 你可以这样使用链接： ... links: - identity:identity-srv ...

    回复于
  • 2

    links are legacy . 多年来现代的方法是确保你的compose文件顶部有版本2（最新的架构版本是3.6但是我将它保持在2这个例子）然后自定义桥接网络上的所有容器都保持不变在DNS中，可以在该网络上相互访问 . Docker为每个虚拟网络提供一个私有DNS服务器，并且不再使用 hosts 文件来解析同一个docker网络上的容器的名称解析 .

    另请注意，服务名称是它们的默认DNS名称，因此最简单的方法就是保持它们不变，这样您就不会有明确的主机名键/值 .

    这应该工作 . 您将能够从 facade ping identity ，反之亦然：

    version: '2'
services:
  identity:
    image: xxx/identity-srv
    ports:
      - "50051:50051"
    depends_on:
      arangodb:
        condition: service_healthy
    healthcheck:
      test: "exit 0"

  facade:
    image: xxx/facade-srv
    ports:
      - "5000:5000"
    depends_on:
      identity:
        condition: service_healthy
    回复于

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