请求超时

未完成撰写的文档，因为版本迭代过快，跟新版本会存在一定差异，后续会进行补充完善。

前提条件¶

已安装 moviereview 服务

超时¶

把 reviews 请求转发到 reviews-v2，并把请求超时设置为 500ms：

cat <<EOF | kubectl apply -f -
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: reviews-timeout
  namespace: moviereview
spec:
  parentRefs:
  - group: ""
    kind: Service
    name: reviews
    port: 9080
  rules:
  - timeouts:
      request: 500ms
    backendRefs:
    - name: reviews-v2
      port: 9080
EOF

查看资源信息¶

kubectl get httproute -n moviereview

TODO 过时内容

验证¶

先把 dubbod 的测试入口转发到本地：

kubectl -n dubbo-system port-forward deploy/dubbod 17171:17171

正常超时时间下，请求应该返回 reviews-v2：

grpcurl -plaintext \
  -d '{"url":"xds:///reviews.moviereview.svc.cluster.local:9080","path":"/reviews"}' \
  :17171 proto.XDSTestService/ForwardHTTP | jq -r '.output | join("")'

预期输出包含 v2：

reviews v2

把超时临时改成 1ms，验证请求会被取消：

kubectl -n moviereview patch httproute reviews-timeout --type='merge' -p '
{
  "spec": {
    "rules": [
      {
        "timeouts": {
          "request": "1ms"
        },
        "backendRefs": [
          {
            "name": "reviews-v2",
            "port": 9080
          }
        ]
      }
    ]
  }
}'

再次请求：

grpcurl -plaintext \
  -d '{"url":"xds:///reviews.moviereview.svc.cluster.local:9080","path":"/reviews"}' \
  :17171 proto.XDSTestService/ForwardHTTP

预期返回 context deadline exceeded：

ERROR:
  Code: Unknown
  Message: Get "http://.../reviews": context deadline exceeded

恢复 500ms 后，请求应重新成功：

kubectl -n moviereview patch httproute reviews-timeout --type='merge' -p '
{
  "spec": {
    "rules": [
      {
        "timeouts": {
          "request": "500ms"
        },
        "backendRefs": [
          {
            "name": "reviews-v2",
            "port": 9080
          }
        ]
      }
    ]
  }
}'

清理资源¶

kubectl -n moviereview delete httproute reviews-timeout