/
watch.go
512 lines (461 loc) · 16.2 KB
/
watch.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 app
import (
"encoding/json"
"fmt"
"net/http"
"os"
"os/signal"
"runtime"
"strconv"
"strings"
"syscall"
"time"
rd "github.com/Tencent/bk-bcs/bcs-common/common/RegisterDiscover"
"github.com/Tencent/bk-bcs/bcs-common/common/blog"
commtype "github.com/Tencent/bk-bcs/bcs-common/common/types"
"github.com/Tencent/bk-bcs/bcs-common/common/version"
"github.com/Tencent/bk-bcs/bcs-common/pkg/registry"
"github.com/Tencent/bk-bcs/bcs-mesos/bcs-mesos-watch/cluster"
"github.com/Tencent/bk-bcs/bcs-mesos/bcs-mesos-watch/cluster/etcd"
"github.com/Tencent/bk-bcs/bcs-mesos/bcs-mesos-watch/cluster/mesos"
"github.com/Tencent/bk-bcs/bcs-mesos/bcs-mesos-watch/service"
"github.com/Tencent/bk-bcs/bcs-mesos/bcs-mesos-watch/storage"
"github.com/Tencent/bk-bcs/bcs-mesos/bcs-mesos-watch/types"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"golang.org/x/net/context"
)
var (
storageState = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "bkbcs_datawatch",
Subsystem: "mesos",
Name: "storage_state",
Help: "The state of bcs-storage that watch detected",
})
clusterState = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "bkbcs_datawatch",
Subsystem: "mesos",
Name: "cluster_state",
Help: "The state of mesos watch cluster state",
})
roleState = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "bkbcs_datawatch",
Subsystem: "mesos",
Name: "role_state",
Help: "The role of meoss watch",
})
)
const (
roleStateMaster float64 = 1
roleStateSlave float64 = 0
stateErr float64 = 0
stateOK float64 = 1
stateRegisteErr float64 = 2
stateDiscvErr float64 = 3
stateNotRun float64 = 4
stateRoleErr float64 = 5
)
func runMetric(cfg *types.CmdConfig) {
blog.Infof("run metric: port(%d)", cfg.MetricPort)
prometheus.MustRegister(storageState)
prometheus.MustRegister(clusterState)
prometheus.MustRegister(roleState)
http.Handle("/metrics", promhttp.Handler())
addr := cfg.Address + ":" + strconv.Itoa(int(cfg.MetricPort))
go http.ListenAndServe(addr, nil)
blog.Infof("run metric ok")
}
//Run running watch
func Run(cfg *types.CmdConfig) error {
if cfg.ClusterID == "" {
blog.Error("datawatcher cluster unknown")
return fmt.Errorf("datawatcher cluster unknown")
}
blog.Info("datawatcher run for cluster %s", cfg.ClusterID)
//create root context for exit
rootCxt, rootCancel := context.WithCancel(context.Background())
interrupt := make(chan os.Signal, 10)
signal.Notify(interrupt, syscall.SIGINT, syscall.SIGKILL, syscall.SIGTERM)
signalCxt, _ := context.WithCancel(rootCxt)
go handleSysSignal(signalCxt, interrupt, rootCancel)
runMetric(cfg)
//create storage
ccStorage, ccErr := storage.NewCCStorage(cfg)
if ccErr != nil {
blog.Error("Create CCStorage Err: %s", ccErr.Error())
return ccErr
}
ccStorage.SetDCAddress(cfg.StorageAddresses)
//servermetric.SetDCStatus(false)
clusterState.Set(stateErr)
ccCxt, _ := context.WithCancel(rootCxt)
ccStorage.Run(ccCxt)
rdCxt, _ := context.WithCancel(rootCxt)
go func() {
retry, rdErr := registerZkEndpoints(rdCxt, cfg)
for retry == true {
if rdErr != nil {
blog.Error("registerZkEndpoints err: %s", rdErr.Error())
}
time.Sleep(3 * time.Second)
blog.Info("retry registerZkEndpoints...")
retry, rdErr = registerZkEndpoints(rdCxt, cfg)
}
if rdErr != nil {
blog.Error("registerZkEndpoints err: %s, and exit", rdErr.Error())
}
}()
var etcdRegistry registry.Registry
if cfg.Etcd.Feature {
blog.Infof("etcd registry enabled")
tlsConfig, err := cfg.Etcd.GetTLSConfig()
if err != nil {
blog.Errorf("get tls config from etcd options failed, err %s", err.Error())
return fmt.Errorf("get tls config from etcd options failed, err %s", err.Error())
}
//get cluster id for registry
clusterID := strings.Split(cfg.ClusterID, "-")
if len(clusterID) == 0 {
blog.Errorf("cluster ID formation error, detail in config: %s", cfg.ClusterID)
return fmt.Errorf("cluster ID formation err")
}
// etcd registry
eoption := ®istry.Options{
Name: clusterID[len(clusterID)-1] + ".mesoswatch.bkbcs.tencent.com",
Version: version.BcsVersion,
RegistryAddr: strings.Split(cfg.Etcd.Address, ","),
RegAddr: fmt.Sprintf("%s:%d", cfg.Address, cfg.MetricPort),
Config: tlsConfig,
}
blog.Infof("turn on etcd registry feature, options %+v", eoption)
etcdRegistry = registry.NewEtcdRegistry(eoption)
err = etcdRegistry.Register()
if err != nil {
blog.Errorf("etcd registry register failed, err %s", err.Error())
return fmt.Errorf("etcd registry register failed, err %s", err.Error())
}
}
// watch netservice servers from ZK.
netservice, netserviceZKRD, err := GetNetService(cfg)
if err != nil {
blog.Error("watch netservice servers failed, %+v", err)
return err
}
blog.Info("after storage created, to run server...")
retry, rdErr := runServer(rdCxt, cfg, ccStorage, netservice)
for retry == true {
if rdErr != nil {
blog.Error("run server err: %s", rdErr.Error())
}
time.Sleep(3 * time.Second)
blog.Info("retry run server...")
retry, rdErr = runServer(rdCxt, cfg, ccStorage, netservice)
}
if rdErr != nil {
blog.Error("run server err: %s", rdErr.Error())
}
blog.Info("to cancel root after runServer returned")
if cfg.Etcd.Feature {
if err := etcdRegistry.Deregister(); err != nil {
blog.Errorf("etcd registry deregister failed, err %s", err.Error())
}
}
netserviceZKRD.Stop()
rootCancel()
return rdErr
}
func handleSysSignal(exitCxt context.Context, signalChan <-chan os.Signal, cancel context.CancelFunc) {
select {
case s := <-signalChan:
blog.V(3).Infof("watch Get singal %s, exit!", s.String())
cancel()
time.Sleep(2 * time.Second)
return
case <-exitCxt.Done():
blog.V(3).Infof("Signal Handler asked to exit")
return
}
}
func runServer(rdCxt context.Context, cfg *types.CmdConfig, storage storage.Storage, netservice *service.InnerService) (bool, error) {
// servermetric.SetClusterStatus(false, "begin run server")
// servermetric.SetRole(metric.SlaveRole)
clusterState.Set(stateErr)
roleState.Set(roleStateSlave)
regDiscv := rd.NewRegDiscoverEx(cfg.RegDiscvSvr, time.Second*10)
if regDiscv == nil {
// servermetric.SetClusterStatus(false, "register error")
clusterState.Set(stateRegisteErr)
return false, fmt.Errorf("NewRegDiscover(%s) return nil", cfg.RegDiscvSvr)
}
blog.Info("NewRegDiscover(%s) succ", cfg.RegDiscvSvr)
err := regDiscv.Start()
if err != nil {
blog.Error("regDisv start error(%s)", err.Error())
// servermetric.SetClusterStatus(false, "register error:"+err.Error())
clusterState.Set(stateRegisteErr)
return false, err
}
blog.Info("RegDiscover start succ")
blog.Infof("ApplicationThreadNum: %d, TaskgroupThreadNum: %d, ExportserviceThreadNum: %d",
cfg.ApplicationThreadNum, cfg.TaskgroupThreadNum, cfg.ExportserviceThreadNum)
host, err := os.Hostname()
if err != nil {
blog.Error("mesoswatcher get hostname err: %s", err.Error())
host = "UNKOWN"
}
var regInfo commtype.MesosDataWatchServInfo
regInfo.ServerInfo.Cluster = cfg.ClusterID
regInfo.ServerInfo.IP = cfg.Address
regInfo.ServerInfo.Port = 0
regInfo.ServerInfo.MetricPort = cfg.MetricPort
regInfo.ServerInfo.HostName = host
regInfo.ServerInfo.Scheme = cfg.ServerSchem
regInfo.ServerInfo.Pid = os.Getpid()
regInfo.ServerInfo.Version = version.GetVersion()
data, err := json.Marshal(regInfo)
key := commtype.BCS_SERV_BASEPATH + "/" + commtype.BCS_MODULE_MESOSDATAWATCH + "/" + cfg.ClusterID + "/" + cfg.Address
discvPath := commtype.BCS_SERV_BASEPATH + "/" + commtype.BCS_MODULE_MESOSDATAWATCH + "/" + cfg.ClusterID
err = regDiscv.RegisterService(key, []byte(data))
if err != nil {
blog.Error("RegisterService(%s) error(%s)", key, err.Error())
//servermetric.SetClusterStatus(false, "register error:"+err.Error())
clusterState.Set(stateRegisteErr)
regDiscv.Stop()
return true, err
}
blog.Info("RegisterService(%s:%s) succ", key, data)
discvEvent, err := regDiscv.DiscoverService(discvPath)
if err != nil {
blog.Error("DiscoverService(%s) error(%s)", discvPath, err.Error())
//servermetric.SetClusterStatus(false, "discove error:"+err.Error())
clusterState.Set(stateDiscvErr)
regDiscv.Stop()
return true, err
}
blog.Info("DiscoverService(%s) succ", discvPath)
// init, slave, master
var clusterCancel context.CancelFunc
var currCluster cluster.Cluster
clusterCancel = nil
currCluster = nil
appRole := "slave"
tick := time.NewTicker(60 * time.Second)
defer tick.Stop()
for {
select {
case <-rdCxt.Done():
blog.V(3).Infof("runServer asked to exit")
regDiscv.Stop()
if currCluster != nil {
currCluster.Stop()
currCluster = nil
}
if clusterCancel != nil {
clusterCancel()
}
return false, nil
case <-tick.C:
blog.V(3).Infof("tick: runServer is alive, current goroutine num (%d)", runtime.NumGoroutine())
if currCluster != nil && currCluster.GetClusterStatus() != "running" {
blog.V(3).Infof("tick: current cluster status(%s), to rebuild cluster", currCluster.GetClusterStatus())
// servermetric.SetClusterStatus(false, "cluster status not running")
clusterState.Set(stateNotRun)
regDiscv.Stop()
if currCluster != nil {
currCluster.Stop()
currCluster = nil
}
if clusterCancel != nil {
clusterCancel()
}
return true, nil
}
case event := <-discvEvent:
blog.Info("get discover event")
if event.Err != nil {
blog.Error("get discover event err:%s", event.Err.Error())
// servermetric.SetClusterStatus(false, "get discove error:"+event.Err.Error())
clusterState.Set(stateDiscvErr)
regDiscv.Stop()
if currCluster != nil {
currCluster.Stop()
currCluster = nil
}
if clusterCancel != nil {
clusterCancel()
}
return true, event.Err
}
currRole := ""
for i, server := range event.Server {
blog.Info("get discover event: server[%d]: %s %s", i, event.Key, server)
if currRole == "" && i == 0 && server == string(data) {
currRole = "master"
// servermetric.SetRole(metric.MasterRole)
// servermetric.SetClusterStatus(true, "master run ok")
roleState.Set(roleStateMaster)
clusterState.Set(stateOK)
}
if currRole == "" && i != 0 && server == string(data) {
currRole = "slave"
// servermetric.SetRole(metric.SlaveRole)
// servermetric.SetClusterStatus(true, "slave run ok")
roleState.Set(roleStateSlave)
clusterState.Set(stateOK)
}
}
if currRole == "" {
blog.Infof("get discover event, server list len(%d), but cannot find myself", len(event.Server))
regDiscv.Stop()
if currCluster != nil {
currCluster.Stop()
currCluster = nil
}
if clusterCancel != nil {
clusterCancel()
}
//servermetric.SetClusterStatus(false, "role error")
clusterState.Set(stateRoleErr)
return true, fmt.Errorf("currRole is nil")
}
blog.Info("get discover event, curr role: %s", currRole)
if currRole != appRole {
blog.Info("role changed: from %s to %s", appRole, currRole)
appRole = currRole
if appRole == "master" {
blog.Info("become to master: to new and run cluster...")
var cluster cluster.Cluster
if cfg.StoreDriver == "etcd" {
cluster = etcd.NewEtcdCluster(cfg, storage, netservice)
} else {
cluster = mesos.NewMesosCluster(cfg, storage, netservice)
}
if cluster == nil {
blog.Error("Create Cluster Error.")
regDiscv.Stop()
//servermetric.SetClusterStatus(false, "master create cluster error")
clusterState.Set(stateRoleErr)
return true, fmt.Errorf("cluster create failed")
}
currCluster = cluster
clusterCxt, cancel := context.WithCancel(rdCxt)
clusterCancel = cancel
go cluster.Run(clusterCxt)
} else {
blog.Infof("become to slave: to cancel cluster...")
if currCluster != nil {
currCluster.Stop()
currCluster = nil
}
if clusterCancel != nil {
clusterCancel()
clusterCancel = nil
}
}
} // end role change
} // end select
} // end for
}
// GetNetService returns netservice InnerService object for discovery.
func GetNetService(cfg *types.CmdConfig) (*service.InnerService, *rd.RegDiscover, error) {
discovery := rd.NewRegDiscoverEx(cfg.NetServiceZK, 10*time.Second)
if err := discovery.Start(); err != nil {
return nil, nil, fmt.Errorf("get netservice from ZK failed, %+v", err)
}
// zknode: bcs/services/endpoints/netservice
path := fmt.Sprintf("%s/%s", commtype.BCS_SERV_BASEPATH, commtype.BCS_MODULE_NETSERVICE)
eventChan, err := discovery.DiscoverService(path)
if err != nil {
discovery.Stop()
return nil, nil, fmt.Errorf("discover netservice failed, %+v", err)
}
netService := service.NewInnerService(commtype.BCS_MODULE_NETSERVICE, eventChan)
go netService.Watch(cfg)
return netService, discovery, nil
}
func registerZkEndpoints(rdCxt context.Context, cfg *types.CmdConfig) (bool, error) {
clusterinfo := strings.Split(cfg.ClusterInfo, "/")
regDiscv := rd.NewRegDiscoverEx(clusterinfo[0], time.Second*10)
if regDiscv == nil {
return false, fmt.Errorf("registerZkEndpoints(%s) return nil", clusterinfo[0])
}
blog.Info("registerZkEndpoints(%s) succ", clusterinfo[0])
err := regDiscv.Start()
if err != nil {
blog.Error("registerZkEndpoints regDisv start error(%s)", err.Error())
return false, err
}
blog.Info("registerZkEndpoints RegDiscover start succ")
host, err := os.Hostname()
if err != nil {
blog.Error("registerZkEndpoints mesoswatcher get hostname err: %s", err.Error())
host = "UNKOWN"
}
var regInfo commtype.MesosDataWatchServInfo
regInfo.ServerInfo.Cluster = cfg.ClusterID
regInfo.ServerInfo.IP = cfg.Address
regInfo.ServerInfo.Port = 0
regInfo.ServerInfo.MetricPort = cfg.MetricPort
regInfo.ServerInfo.HostName = host
regInfo.ServerInfo.Scheme = cfg.ServerSchem
regInfo.ServerInfo.Pid = os.Getpid()
regInfo.ServerInfo.Version = version.GetVersion()
data, _ := json.Marshal(regInfo)
key := commtype.BCS_SERV_BASEPATH + "/" + commtype.BCS_MODULE_MESOSDATAWATCH + "/" + cfg.Address
discvPath := commtype.BCS_SERV_BASEPATH + "/" + commtype.BCS_MODULE_MESOSDATAWATCH
err = regDiscv.RegisterService(key, []byte(data))
if err != nil {
blog.Error("registerZkEndpoints RegisterService(%s) error(%s)", key, err.Error())
regDiscv.Stop()
return true, err
}
blog.Info("registerZkEndpoints RegisterService(%s:%s) succ", key, data)
discvEvent, err := regDiscv.DiscoverService(discvPath)
if err != nil {
blog.Error("registerZkEndpoints DiscoverService(%s) error(%s)", discvPath, err.Error())
regDiscv.Stop()
return true, err
}
blog.Info("registerZkEndpoints DiscoverService(%s) succ", discvPath)
for {
select {
case <-rdCxt.Done():
blog.V(3).Infof("registerZkEndpoints asked to exit")
regDiscv.Stop()
return false, nil
case event := <-discvEvent:
blog.Info("registerZkEndpoints get discover event")
if event.Err != nil {
blog.Error("registerZkEndpoints get discover event err:%s", event.Err.Error())
regDiscv.Stop()
return true, event.Err
}
registerd := false
for i, server := range event.Server {
blog.Info("registerZkEndpoints get discover event: server[%d]: %s %s", i, event.Key, server)
if server == string(data) {
blog.Infof("registerZkEndpoints get discover event, and myself is registered")
registerd = true
break
}
}
if !registerd {
blog.Infof("registerZkEndpoints get discover event, server list len(%d), but cannot find myself", len(event.Server))
regDiscv.Stop()
return true, fmt.Errorf("current server is nil")
}
} // end select
} // end for
}