docker - 配置 docker 注册表通知

Question

我使用 official helm chart 设置了一个 docker 注册表在我的 k8s 集群上。
我尝试按照 the docs 为我的注册表配置通知， 如下:

apiVersion: v1
data:
  config.yml: |-
    health:
      storagedriver:
        enabled: true
        interval: 10s
        threshold: 3
    http:
      addr: :5000
      headers:
        X-Content-Type-Options:
        - nosniff
    notifications:
      endpoints:
        - name: keel
          url: http://keel.example.com/v1/webhooks/registry
          headers:
            Content-Type: application/json
          timeout: 500ms
          threshold: 5
          backoff: 1s
    log:
      fields:
        service: registry
    storage:
      cache:
        blobdescriptor: inmemory
    version: 0.1
kind: ConfigMap

将配置更改为包含通知后，注册表无法启动，因为它无法识别配置。我收到此错误:

configuration error: error parsing /etc/docker/registry/config.yml: yaml: unmarshal errors:
  line 16: cannot unmarshal !!str `applica...` into []string

Usage: 
  registry serve <config> [flags]
Flags:
  -h, --help=false: help for serve


Additional help topics:

Answer 1

您错过了 yaml 字符 [在他们的文档中(我承认这是一个糟糕的例子，因为 [ 经常在文档中用作“占位符在此处”)，因为在 yaml 中，它是将项目转换为列表的字符 - 就像在JSON，YAML 从中汲取灵感

但是，除此之外，cannot unmarshal str into []string应该是一个死的赠品，他们期待标题的字符串数组:

headers:
  Content-Type:
  - application/json

或者，使用他们的 的语法可怕例子:

headers:
  Content-Type: [application/json]

跟进， endpoints: reference docs还指出:

A list of static headers to add to each request. Each header's name is a key beneath headers, and each value is a list of payloads for that header name. Values must always be lists.

(重点是我的)