109 lines
2.6 KiB
Go
109 lines
2.6 KiB
Go
// Copyright 2017 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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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// See the License for the specific language governing permissions and
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// limitations under the License.
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package server
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"sync"
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"github.com/gorilla/mux"
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"github.com/juju/errors"
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"github.com/ngaut/log"
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"github.com/pingcap/pd/pd-client"
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"github.com/pingcap/tidb/mysql"
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"github.com/pingcap/tidb/store/tikv"
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"github.com/pingcap/tidb/util/printer"
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"github.com/prometheus/client_golang/prometheus"
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)
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var once sync.Once
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const defaultStatusAddr = ":10080"
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func (s *Server) startStatusHTTP() {
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// prepare region cache for region http server
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pdClient, err := s.getPdClient()
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if err != nil {
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log.Fatal(err)
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}
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once.Do(func() {
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go s.startHTTPServer(pdClient)
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})
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}
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func (s *Server) getPdClient() (pd.Client, error) {
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if s.cfg.Store != "tikv" {
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return nil, nil
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}
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path := fmt.Sprintf("%s://%s", s.cfg.Store, s.cfg.StorePath)
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etcdAddrs, err := tikv.ParseEtcdAddr(path)
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if err != nil {
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return nil, err
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}
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client, err := pd.NewClient(etcdAddrs)
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if err != nil {
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return nil, errors.Trace(err)
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}
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return client, nil
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}
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func (s *Server) startHTTPServer(pdClient pd.Client) {
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router := mux.NewRouter()
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router.HandleFunc("/status", s.handleStatus)
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// HTTP path for prometheus.
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router.Handle("/metrics", prometheus.Handler())
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// HTTP path for regions
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router.Handle("/tables/{db}/{table}/regions", s.newTableRegionsHandler(pdClient))
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router.Handle("/regions/{regionID}", s.newRegionHandler(pdClient))
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addr := s.cfg.StatusAddr
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if len(addr) == 0 {
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addr = defaultStatusAddr
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}
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log.Infof("Listening on %v for status and metrics report.", addr)
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http.Handle("/", router)
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err := http.ListenAndServe(addr, nil)
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if err != nil {
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log.Fatal(err)
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}
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}
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// TiDB status
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type status struct {
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Connections int `json:"connections"`
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Version string `json:"version"`
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GitHash string `json:"git_hash"`
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}
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func (s *Server) handleStatus(w http.ResponseWriter, req *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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st := status{
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Connections: s.ConnectionCount(),
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Version: mysql.ServerVersion,
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GitHash: printer.TiDBGitHash,
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}
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js, err := json.Marshal(st)
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if err != nil {
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w.WriteHeader(http.StatusInternalServerError)
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log.Error("Encode json error", err)
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} else {
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w.Write(js)
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}
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}
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