为什么consul health check返回空数组？

Question

我们有一个docker-compose.yml文件：

version: '3'
services:
  consul:
    container_name: consul
    command: agent -dev -config-dir=/consul/config
    dns: 8.8.8.8
    hostname: consul-docker
    image: docker-registry.mycompany.net/ap/consul-ent:0.9.2
    ports:
      - "8500:8500"
    volumes:
      - ./consul/config/conf.json:/consul/config/conf.json

# https://github.com/gliderlabs/registrator
  registrator:
    command: consul://consul:8500
    container_name: registrator
    depends_on:
      - consul
    image: gliderlabs/registrator:latest
    restart: always
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock

  myservice1:
    container_name: myservice1
    image: docker-registry.mycompany.net/ap/myservice1/develop:latest
    ports:
      - "8080:8080"
      - "5000:5000"

# more services below

当我通过转到http://localhost:8500/v1/health/checks/myservice1使用consul v1 API检查健康状态时，它返回一个空数组[]。

​

根据docker ps和myservice1的日志，myservice1已准备就绪。

http://localhost:8500/ui/#/dc1/services上的myservice1显示为绿色

myservice1是一个基于dropwizard的Java微服务。

根据https://www.consul.io/api/health.html的说法，样本响应

$ curl https://consul.rocks/v1/health/service/my-service

看起来像这样：

[
  {
    "Node": {
      "ID": "40e4a748-2192-161a-0510-9bf59fe950b5",
      "Node": "foobar",
      "Address": "10.1.10.12",
      "Datacenter": "dc1",
      "TaggedAddresses": {
        "lan": "10.1.10.12",
        "wan": "10.1.10.12"
      },
      "Meta": {
        "instance_type": "t2.medium"
      }
    },
    "Service": {
      "ID": "redis",
      "Service": "redis",
      "Tags": ["primary"],
      "Address": "10.1.10.12",
      "Port": 8000
    },
    "Checks": [
      {
        "Node": "foobar",
        "CheckID": "service:redis",
        "Name": "Service 'redis' check",
        "Status": "passing",
        "Notes": "",
        "Output": "",
        "ServiceID": "redis",
        "ServiceName": "redis",
        "ServiceTags": ["primary"]
      },
      {
        "Node": "foobar",
        "CheckID": "serfHealth",
        "Name": "Serf Health Status",
        "Status": "passing",
        "Notes": "",
        "Output": "",
        "ServiceID": "",
        "ServiceName": "",
        "ServiceTags": []
      }
    ]
  }
]

根据注册器日志，它看到myservice1正常，正在添加myservice1。

有什么想法可以解释为什么我会看到[]回复吗？

Answer 1

在遵循https://gliderlabs.com/registrator/latest/user/backends/上的说明后，我能够进行基本的健康检查。我的印象是，在设置注册器和领事后，健康检查将自动工作。我需要在docker-compose.yml中提供环境变量来设置HTTP检查，如下所示：

SERVICE_80_CHECK_HTTP=/health/endpoint/path
SERVICE_80_CHECK_INTERVAL=15s
SERVICE_80_CHECK_TIMEOUT=1s     # optional, Consul default used otherwise