health.go 1.3 KB

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  1. // Copyright 2017 The etcd Authors
  2. //
  3. // Licensed under the Apache License, Version 2.0 (the "License");
  4. // you may not use this file except in compliance with the License.
  5. // You may obtain a copy of the License at
  6. //
  7. // http://www.apache.org/licenses/LICENSE-2.0
  8. //
  9. // Unless required by applicable law or agreed to in writing, software
  10. // distributed under the License is distributed on an "AS IS" BASIS,
  11. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12. // See the License for the specific language governing permissions and
  13. // limitations under the License.
  14. package grpcproxy
  15. import (
  16. "context"
  17. "net/http"
  18. "time"
  19. "go.etcd.io/etcd/clientv3"
  20. "go.etcd.io/etcd/etcdserver/api/etcdhttp"
  21. "go.etcd.io/etcd/etcdserver/api/v3rpc/rpctypes"
  22. )
  23. // HandleHealth registers health handler on '/health'.
  24. func HandleHealth(mux *http.ServeMux, c *clientv3.Client) {
  25. mux.Handle(etcdhttp.PathHealth, etcdhttp.NewHealthHandler(func() etcdhttp.Health { return checkHealth(c) }))
  26. }
  27. func checkHealth(c *clientv3.Client) etcdhttp.Health {
  28. h := etcdhttp.Health{Health: "false"}
  29. ctx, cancel := context.WithTimeout(c.Ctx(), time.Second)
  30. _, err := c.Get(ctx, "a")
  31. cancel()
  32. if err == nil || err == rpctypes.ErrPermissionDenied {
  33. h.Health = "true"
  34. }
  35. return h
  36. }