mirror of
https://gitee.com/milvus-io/milvus.git
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114 lines
3.1 KiB
Go
114 lines
3.1 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package healthz
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import (
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"context"
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"encoding/json"
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"fmt"
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"net/http"
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"github.com/milvus-io/milvus-proto/go-api/commonpb"
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"github.com/milvus-io/milvus-proto/go-api/milvuspb"
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"github.com/milvus-io/milvus/internal/log"
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"go.uber.org/zap"
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)
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// GetComponentStatesInterface defines the interface that get states from component.
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type GetComponentStatesInterface interface {
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// GetComponentStates returns the states of component.
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GetComponentStates(ctx context.Context, request *milvuspb.GetComponentStatesRequest) (*milvuspb.ComponentStates, error)
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}
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type Indicator interface {
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GetName() string
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Health(ctx context.Context) commonpb.StateCode
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}
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type IndicatorState struct {
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Name string `json:"name"`
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Code commonpb.StateCode `json:"code"`
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}
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type HealthResponse struct {
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State string `json:"state"`
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Detail []*IndicatorState `json:"detail"`
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}
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type HealthHandler struct {
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indicators []Indicator
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}
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var _ http.Handler = (*HealthHandler)(nil)
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var defaultHandler = HealthHandler{}
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func Register(indicator Indicator) {
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defaultHandler.indicators = append(defaultHandler.indicators, indicator)
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}
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func Handler() *HealthHandler {
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return &defaultHandler
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}
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func (handler *HealthHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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resp := &HealthResponse{
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State: "OK",
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}
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ctx := context.Background()
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for _, in := range handler.indicators {
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code := in.Health(ctx)
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resp.Detail = append(resp.Detail, &IndicatorState{
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Name: in.GetName(),
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Code: code,
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})
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if code != commonpb.StateCode_Healthy && code != commonpb.StateCode_StandBy {
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resp.State = fmt.Sprintf("component %s state is %s", in.GetName(), code.String())
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}
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}
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if resp.State == "OK" {
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w.WriteHeader(http.StatusOK)
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} else {
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w.WriteHeader(http.StatusInternalServerError)
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}
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// for compatibility
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if r.Header.Get(ContentTypeHeader) != ContentTypeJSON {
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writeText(w, r, resp.State)
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return
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}
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writeJSON(w, r, resp)
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}
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func writeJSON(w http.ResponseWriter, r *http.Request, resp *HealthResponse) {
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w.Header().Set(ContentTypeHeader, ContentTypeJSON)
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bs, err := json.Marshal(resp)
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if err != nil {
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log.Warn("faild to send response", zap.Error(err))
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}
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w.Write(bs)
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}
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func writeText(w http.ResponseWriter, r *http.Request, reason string) {
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w.Header().Set(ContentTypeHeader, ContentTypeText)
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_, err := fmt.Fprint(w, reason)
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if err != nil {
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log.Warn("failed to send response",
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zap.Error(err))
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}
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}
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