在DigitalOcean App Platform配置www转非www重定向遇验证错误

我尝试部署带有如下App Spec的应用，配置www到非www的Ingress重定向规则时遭遇报错：

第一个报错：
error validating app spec field "ingress.rules.rule.match.type": App Ingress routing match type is missing

添加path条目后，又出现新报错：
error validating app spec field "ingress.rules.rule.match": rule matching path prefix "/" already in use by rule with component: "website"

原App Spec内容：

alerts:
- rule: DEPLOYMENT_FAILED
- rule: DOMAIN_FAILED
domains:
  - domain: domain.bla
    type: PRIMARY
    zone: domain.bla
  - domain: www.domain.bla
    type: ALIAS
    zone: domain.bla
features:
- buildpack-stack=ubuntu-22
ingress:
  rules:
  - component:
      name: website
    match:
      path:
        prefix: /
      authority:
        exact: "domain.bla"
  - redirect:
      authority: "domain.bla"
    match:
      authority:
        exact: "www.domain.bla"
      path:
        prefix: /
name: domain-bla
region: lon
services:
- http_port: 80
  image:
    # snip
  instance_count: 1
  instance_size_slug: basic-xxs
  name: website

解决方案 #

问题核心在于Ingress规则缺少明确的匹配类型定义，且重复使用了路径前缀/的匹配规则。调整后的配置如下：

alerts:
- rule: DEPLOYMENT_FAILED
- rule: DOMAIN_FAILED
domains:
  - domain: domain.bla
    type: PRIMARY
    zone: domain.bla
  - domain: www.domain.bla
    type: ALIAS
    zone: domain.bla
features:
- buildpack-stack=ubuntu-22
ingress:
  rules:
  - component:
      name: website
    match:
      type: path_prefix
      path: /
      authority:
        exact: "domain.bla"
  - redirect:
      authority: "domain.bla"
      type: permanent_redirect
    match:
      type: authority_exact
      authority: "www.domain.bla"
name: domain-bla
region: lon
services:
- http_port: 80
  image:
    # snip
  instance_count: 1
  instance_size_slug: basic-xxs
  name: website

修改说明 #

• 为每个match块添加type字段：第一个规则用path_prefix明确匹配路径前缀，第二个规则用authority_exact仅匹配域名，避免路径规则重复冲突。
• 重定向规则添加type: permanent_redirect（可根据需求改为temporary_redirect），明确重定向类型。
• 移除重定向规则中的path配置，仅通过域名匹配完成www到非www的跳转，所有子路径会自动继承该重定向逻辑。

内容的提问来源于stack exchange，提问作者Jasper van den Bosch