/
controller.go
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/
controller.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 controller xxx
package controller
import (
"encoding/json"
"os"
"strings"
"github.com/Tencent/bk-bcs/bcs-common/common/blog"
commtypes "github.com/Tencent/bk-bcs/bcs-common/common/types"
"github.com/Tencent/bk-bcs/bcs-services/bcs-service-prometheus/config"
"github.com/Tencent/bk-bcs/bcs-services/bcs-service-prometheus/discovery"
)
const (
// ServiceMonitorModule name
ServiceMonitorModule = "ServiceMonitor"
)
// PrometheusController controller for prometheus service discovery
type PrometheusController struct {
promFilePrefix string
clusterID string
conf *config.Config
discovers map[string]discovery.Discovery
mesosModules []string
serviceModules []string
nodeModules []string
serviceMonitor string
}
// NewPrometheusController new prometheus controller
func NewPrometheusController(conf *config.Config) *PrometheusController {
prom := &PrometheusController{
conf: conf,
clusterID: conf.ClusterID,
promFilePrefix: conf.PromFilePrefix,
discovers: make(map[string]discovery.Discovery),
mesosModules: []string{commtypes.BCS_MODULE_SCHEDULER, commtypes.BCS_MODULE_MESOSDATAWATCH,
commtypes.BCS_MODULE_MESOSAPISERVER,
commtypes.BCS_MODULE_DNS, commtypes.BCS_MODULE_LOADBALANCE},
serviceModules: []string{commtypes.BCS_MODULE_APISERVER, commtypes.BCS_MODULE_STORAGE,
commtypes.BCS_MODULE_NETSERVICE},
nodeModules: []string{discovery.CadvisorModule, discovery.NodeexportModule},
serviceMonitor: ServiceMonitorModule,
}
if len(conf.ServiceModules) > 0 {
prom.serviceModules = conf.ServiceModules
}
if len(conf.ClusterModules) > 0 {
prom.mesosModules = conf.ClusterModules
}
return prom
}
// Start to work update prometheus sd config
func (prom *PrometheusController) Start() error {
// init bcs mesos module discovery
if prom.conf.EnableMesos {
dis, err := discovery.NewBcsDiscovery(prom.conf.ClusterZk, prom.promFilePrefix, prom.mesosModules)
if err != nil {
blog.Errorf("NewBcsDiscovery ClusterZk %s error %s", prom.conf.ClusterZk, err.Error())
return err
}
// register event handle function
dis.RegisterEventFunc(prom.handleDiscoveryEvent)
for _, module := range prom.mesosModules {
prom.discovers[module] = dis
}
err = dis.Start()
if err != nil {
blog.Errorf("mesosDiscovery start failed: %s", err.Error())
return err
}
}
// init node discovery
if prom.conf.EnableNode {
for _, module := range prom.nodeModules {
var nodeDiscovery discovery.Discovery
var err error
if prom.conf.Kubeconfig != "" {
nodeDiscovery, err = discovery.NewNodeEtcdDiscovery(prom.conf.Kubeconfig, prom.promFilePrefix, module,
prom.conf.CadvisorPort, prom.conf.NodeExportPort)
} else {
zkAddr := strings.Split(prom.conf.ClusterZk, ",")
nodeDiscovery, err = discovery.NewNodeZkDiscovery(zkAddr, prom.promFilePrefix, module, prom.conf.CadvisorPort,
prom.conf.NodeExportPort)
}
if err != nil {
blog.Errorf("NewNodeDiscovery ClusterZk %s error %s", prom.conf.ClusterZk, err.Error())
return err
}
// register event handle function
nodeDiscovery.RegisterEventFunc(prom.handleDiscoveryEvent)
prom.discovers[module] = nodeDiscovery
err = nodeDiscovery.Start()
if err != nil {
blog.Errorf("nodeDiscovery start failed: %s", err.Error())
}
}
}
// init bcs service module discovery
if prom.conf.EnableService {
serviceDiscovery, err := discovery.NewBcsDiscovery(prom.conf.ServiceZk, prom.promFilePrefix, prom.serviceModules)
if err != nil {
blog.Errorf("NewBcsDiscovery ClusterZk %s error %s", prom.conf.ServiceZk, err.Error())
return err
}
// register event handle function
serviceDiscovery.RegisterEventFunc(prom.handleDiscoveryEvent)
for _, module := range prom.serviceModules {
prom.discovers[module] = serviceDiscovery
}
err = serviceDiscovery.Start()
if err != nil {
blog.Errorf("serviceDiscovery start failed: %s", err.Error())
return err
}
}
// init taskgroup ServiceMonitor discovery
if prom.conf.EnableServiceMonitor {
serviceDiscovery, err := discovery.NewServiceMonitor(prom.conf.Kubeconfig, prom.promFilePrefix, prom.serviceMonitor)
if err != nil {
blog.Errorf("NewBcsDiscovery ClusterZk %s error %s", prom.conf.ServiceZk, err.Error())
return err
}
// register event handle function
serviceDiscovery.RegisterEventFunc(prom.handleDiscoveryEvent)
prom.discovers[prom.serviceMonitor] = serviceDiscovery
err = serviceDiscovery.Start()
if err != nil {
blog.Errorf("serviceDiscovery start failed: %s", err.Error())
return err
}
}
return nil
}
func (prom *PrometheusController) handleDiscoveryEvent(dInfo discovery.Info) {
blog.Infof("discovery %s service discovery config changed", dInfo.Module)
disc, ok := prom.discovers[dInfo.Module]
if !ok {
blog.Errorf("not found discovery %s", dInfo.Module)
return
}
sdConfig, err := disc.GetPrometheusSdConfig(dInfo.Key)
if err != nil {
// if serviceMonitor Not Found, then delete the specify config file
if strings.Contains(err.Error(), "Not Found") {
prom.deletePrometheusConfigFile(dInfo)
return
}
blog.Errorf("discovery %s get prometheus service discovery config error %s", dInfo.Key, err.Error())
return
}
by, _ := json.Marshal(sdConfig)
file, err := os.OpenFile(disc.GetPromSdConfigFile(dInfo.Key), os.O_RDWR|os.O_CREATE, 0644)
if err != nil {
blog.Errorf("open/create file %s error %s", disc.GetPromSdConfigFile(dInfo.Key), err.Error())
return
}
defer file.Close()
err = file.Truncate(0)
if err != nil {
blog.Errorf("Truncate file %s error %s", disc.GetPromSdConfigFile(dInfo.Key), err.Error())
return
}
_, err = file.Write(by)
if err != nil {
blog.Errorf("write file %s error %s", disc.GetPromSdConfigFile(dInfo.Key), err.Error())
return
}
blog.Infof("discovery %s write config file %s success", dInfo.Key, disc.GetPromSdConfigFile(dInfo.Key))
}
func (prom *PrometheusController) deletePrometheusConfigFile(dInfo discovery.Info) {
disc, ok := prom.discovers[dInfo.Module]
if !ok {
blog.Errorf("not found discovery %s", dInfo.Module)
return
}
cFile := disc.GetPromSdConfigFile(dInfo.Key)
err := os.Remove(cFile)
if err != nil {
blog.Errorf("remove config file(%s) error %s", cFile, err.Error())
return
}
blog.Infof("remove config file(%s) success", cFile)
}