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storegw.go
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storegw.go
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/*
* Tencent is pleased to support the open source community by making Blueking Container Service available.
* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
* Licensed under the MIT License (the "License"); you may not use this file except
* in compliance with the License. You may obtain a copy of the License at
* http://opensource.org/licenses/MIT
* Unless required by applicable law or agreed to in writing, software distributed under
* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions and
* limitations under the License.
*/
// Package storegw xxx
package storegw
import (
"context"
"encoding/json"
"strconv"
"github.com/go-kit/log"
"github.com/go-kit/log/level"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/model"
"github.com/prometheus/prometheus/discovery/targetgroup"
"github.com/thanos-io/thanos/pkg/store/storepb"
"github.com/Tencent/bk-bcs/bcs-services/bcs-monitor/pkg/config"
"github.com/Tencent/bk-bcs/bcs-services/bcs-monitor/pkg/utils"
)
// StoreFactory 工厂模式
type StoreFactory func(logger log.Logger, reg *prometheus.Registry, conf *config.StoreConf) (storepb.StoreServer, error)
// StoreGW Store 管理结构
type StoreGW struct {
confs []*config.StoreConf
stores map[string]*Store
logger log.Logger
ctx context.Context
reg *prometheus.Registry
stop func()
GRPCAdvertiseIP string
portRange *PortRange
storeFunc StoreFactory
}
// NewStoreGW :
func NewStoreGW(ctx context.Context, logger log.Logger, reg *prometheus.Registry, grpcAdvertiseIP string,
grpcAdvertisePortRangeStr string, confs []*config.StoreConf, storeFunc StoreFactory) (*StoreGW, error) {
portRange, err := NewPortRange(grpcAdvertisePortRangeStr)
if err != nil {
return nil, err
}
ctx, cancel := context.WithCancel(ctx)
gw := &StoreGW{
confs: confs,
ctx: ctx,
stop: cancel,
logger: logger,
reg: reg,
GRPCAdvertiseIP: grpcAdvertiseIP,
portRange: portRange,
stores: map[string]*Store{},
storeFunc: storeFunc,
}
if err := gw.initStore(); err != nil {
return nil, err
}
return gw, nil
}
// initStore 初始化 store
func (s *StoreGW) initStore() error {
for idx, conf := range s.confs {
port, err := s.portRange.AllocatePort(int64(idx))
if err != nil {
return err
}
address := utils.GetListenAddr(s.GRPCAdvertiseIP, strconv.FormatInt(port, 10))
storeSvr, err := s.storeFunc(s.logger, s.reg, conf)
if err != nil {
return err
}
store, err := NewStore(s.ctx, s.logger, s.reg, address, conf, storeSvr)
if err != nil {
return err
}
id := strconv.Itoa(idx)
s.stores[id] = store
}
return nil
}
// Run 启动服务
func (s *StoreGW) Run() error {
for idx, s := range s.stores {
go func(idx string, s Store) {
logger := log.With(s.logger, "provider", s.Type, "id", idx)
// 因为阻塞, 另外启动,同时打印日志
err := s.ListenAndServe()
if err != nil {
_ = level.Error(logger).Log("msg", "ListenAndServe grpc server done", "err", err)
return
}
_ = level.Info(logger).Log("msg", "ListenAndServe grpc server done")
}(idx, *s)
}
<-s.ctx.Done()
return nil
}
// Shutdown xxx
func (s *StoreGW) Shutdown(err error) {
s.stop()
}
// Group 兼容 targetgroup.Group, 老版本没有MarshalJSON, 按最新版本
// 参考 https://github.com/prometheus/prometheus/blob/v2.36.2/discovery/targetgroup/targetgroup.go#L96
type Group struct {
targetgroup.Group
}
// MarshalJSON implements the json.Marshaler interface.
func (tg Group) MarshalJSON() ([]byte, error) {
g := &struct {
Targets []string `json:"targets"`
Labels model.LabelSet `json:"labels,omitempty"`
}{
Targets: make([]string, 0, len(tg.Targets)),
Labels: tg.Labels,
}
for _, t := range tg.Targets {
g.Targets = append(g.Targets, string(t[model.AddressLabel]))
}
return json.Marshal(g)
}
// TargetGroups 返回标准的targets
func (s *StoreGW) TargetGroups() []*Group {
tgs := make([]*Group, 0, len(s.stores))
for _, store := range s.stores {
tgs = append(tgs, &Group{targetgroup.Group{
Targets: []model.LabelSet{
{model.AddressLabel: model.LabelValue(store.Address)},
},
Labels: model.LabelSet{},
}})
}
return tgs
}
// GetStoreAddrs 本地 store 地址
func (s *StoreGW) GetStoreAddrs() []string {
addrs := make([]string, 0, len(s.stores))
for _, store := range s.stores {
addrs = append(addrs, store.Address)
}
return addrs
}