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engine.go
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engine.go
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// Copyright 2020 Douyu
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// 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 core
import (
"context"
"fmt"
"sync"
"time"
"github.com/douyu/juno-agent/pkg/check"
"github.com/douyu/juno-agent/pkg/job"
"github.com/douyu/juno-agent/pkg/mbus"
"github.com/douyu/juno-agent/pkg/mbus/rocketmq"
"github.com/douyu/juno-agent/pkg/nginx"
"github.com/douyu/juno-agent/pkg/pmt/supervisor"
"github.com/douyu/juno-agent/pkg/pmt/systemd"
"github.com/douyu/juno-agent/pkg/process"
"github.com/douyu/juno-agent/pkg/proxy/confProxy"
"github.com/douyu/juno-agent/pkg/proxy/regProxy"
"github.com/douyu/juno-agent/pkg/report"
"github.com/douyu/juno-agent/pkg/structs"
"github.com/douyu/jupiter"
"github.com/douyu/jupiter/pkg/client/etcdv3"
"github.com/douyu/jupiter/pkg/util/xgo"
"github.com/douyu/jupiter/pkg/xlog"
"golang.org/x/sync/errgroup"
)
// Engine engine
type Engine struct {
jupiter.Application
registryClient *etcdv3.Client
confClient *etcdv3.Client
clients []*Client
tracer mbus.Tracer
// Depending on the configuration details, decide which plug-ins to open
programs sync.Map
processMap sync.Map
healthCheck *check.HealthCheck
process *process.Scanner
confProxy *confProxy.ConfProxy
regProxy *regProxy.RegProxy
report *report.Report
supervisorScanner *supervisor.Scanner
systemdScanner *systemd.Scanner
nginxScanner *nginx.ConfScanner
worker *job.Worker
}
// NewEngine new the engine
func NewEngine() *Engine {
eng := &Engine{}
//eng.SetRegistry(
// compound_registry.New(
// etcdv3_registry.StdConfig("test").Build(),
// ),
//)
if err := eng.Startup(
eng.startLogRecord,
eng.startReportStatus, // start report agent status
eng.startNginxConfScanner,
eng.loadServiceNode, // load service nodes, and init configurations
eng.startProcessScanner,
eng.startConfProxy,
eng.startRegProxy,
eng.startSupervisorScanner, // scan supervisor conf dir in agent mode
eng.startSystemdScanner, // scan systemd conf dir in agent mode
eng.startEventLogger, // start event logger,
eng.startShellProxy, // start shell execution proxy,
eng.startHealthScanner, // start health scanner,
eng.startHealCheck,
eng.serveGRPC,
eng.serveHTTP,
eng.startWorker,
); err != nil {
xlog.Panic("new engine", xlog.Any("err", err))
}
err := eng.RegisterHooks(jupiter.StageAfterStop, eng.cleanJobs)
if err != nil {
xlog.Panicf("register hook failed. err=%s", err.Error())
}
return eng
}
// startLogRecord start log record
func (eng *Engine) startLogRecord() error {
xlog.DefaultLogger = xlog.StdConfig("default").Build()
return nil
}
// loadServiceNode ... TODO
func (eng *Engine) loadServiceNode() error { // load service node from local storage
// recover fast when run fail
return nil
}
// startConfProxy start app conf plugin
func (eng *Engine) startConfProxy() error {
eng.confProxy = confProxy.StdConfig("confProxy").Build()
eng.confProxy.Start()
xgo.Go(func() {
for node := range eng.confProxy.C() {
// Monitor the confNode information of confProxy and bring the node into the Engine for management
eng.upsertConfClient(node)
// 1.0 Prefetch the registration configuration information for the pull configuration client application
if err := eng.loadServiceConfiguration(node.AppName); err != nil {
xlog.Error("load service configuration")
}
}
})
return nil
}
// startRegProxy start app regist proxy plugin
func (eng *Engine) startRegProxy() error {
eng.regProxy = regProxy.StdConfig("regProxy").Build()
if eng.regProxy == nil {
return nil
}
if err := eng.regProxy.Start(); err != nil {
return err
}
xgo.Go(func() {
for node := range eng.regProxy.C() {
eng.upsertRegClient(node)
}
})
return nil
}
// startHealthScanner check node health status
func (eng *Engine) startHealthScanner() error {
xgo.Go(
eng.checkServiceNodes,
)
return nil
}
// startSupervisorScanner check and scan supervisor config
func (eng *Engine) startSupervisorScanner() error {
eng.supervisorScanner = supervisor.StdConfig("supervisor").Build()
if err := eng.supervisorScanner.Start(); err != nil {
return err
}
programs, err := eng.supervisorScanner.ListPrograms()
if err != nil {
xlog.Error("startSupervisorScanner err", xlog.String("err", err.Error()))
return nil
}
for _, program := range programs {
eng.updateProgram(program.Unwrap())
}
xgo.Go(func() {
for program := range eng.supervisorScanner.C() {
eng.updateProgram(program.Unwrap())
}
})
return nil
}
// startSystemdScanner check and scan systemd cofig
func (eng *Engine) startSystemdScanner() error {
eng.systemdScanner = systemd.StdConfig("systemd").Build()
if err := eng.systemdScanner.Start(); err != nil {
return err
}
programs, err := eng.systemdScanner.ListPrograms()
if err != nil {
xlog.Debug("startSystemdScanner", xlog.String("err", err.Error()))
return nil
}
for _, program := range programs {
eng.updateProgram(program.Unwrap())
}
xgo.Go(func() {
for program := range eng.systemdScanner.C() {
eng.updateProgram(program.Unwrap())
}
})
return nil
}
// startProcessScanner check go process
func (eng *Engine) startProcessScanner() error {
eng.process = process.StdConfig("process").Build()
if err := eng.process.Start(); err != nil {
return err
}
processes, err := eng.process.Scan()
if err != nil {
return err
}
eng.updateProcesses(processes...)
xgo.Go(func() {
for processes := range eng.process.C() {
eng.updateProcesses(processes...)
}
})
return nil
}
// startShellProxy ...
func (eng *Engine) startShellProxy() error {
return nil
}
// startEventLogger ...
func (eng *Engine) startEventLogger() error {
tracer := rocketmq.New()
if err := tracer.Start(); err != nil {
return nil
}
// eng.tracer = tracer
return nil
}
// startNginxConfScanner ...
func (eng *Engine) startNginxConfScanner() error {
eng.nginxScanner = nginx.StdConfig("nginx").Build()
confs, err := eng.nginxScanner.Scan()
if err != nil {
xlog.Error("startNginxScanner", xlog.String("err", err.Error()))
return nil
}
for _, conf := range confs {
eng.updateNginxProgram(conf)
}
if err := eng.nginxScanner.Start(); err != nil {
return err
}
xgo.Go(func() {
for update := range eng.nginxScanner.C() {
eng.updateNginxProgram(update)
}
})
return nil
}
// startReportStatus monitor the health status of the machine deployed by the agent, and regularly report the health information to the caller
func (eng *Engine) startReportStatus() error {
eng.report = report.StdConfig("report").Build()
err := eng.report.ReportAgentStatus()
return err
}
// startHealCheck health status (including tcp, mysql, redis, http)
func (eng *Engine) startHealCheck() error {
eng.healthCheck = check.StdConfig("healthCheck").Build()
return nil
}
func (eng *Engine) startWorker() error {
worker := job.StdConfig("worker").Build()
if worker == nil {
return nil
}
eng.worker = worker
return worker.Run()
}
func (eng *Engine) loadServiceConfiguration(name string) interface{} {
return nil
}
func (eng *Engine) getConfigStatus(configPath string) map[string]bool {
var confStatusMap = map[string]bool{
"supervisor": false,
"systemd": false,
}
if _, ok := eng.programs.Load(fmt.Sprintf("%s_%s", "supervisor", configPath)); ok {
confStatusMap["supervisor"] = true
}
if _, ok := eng.programs.Load(fmt.Sprintf("%s_%s", "systemd", configPath)); ok {
confStatusMap["systemd"] = true
}
return confStatusMap
}
func (eng *Engine) upsertRegClient(node *structs.ServiceNode) {
for _, c := range eng.clients {
if c.AppName != node.AppName || c.IP != node.IP {
continue
}
if c.ServiceNodes == nil {
c.ServiceNodes = make(map[*structs.ServiceNode]*CheckMeta)
}
for sn := range c.ServiceNodes {
if sn.IP == node.IP && sn.Port == node.Port && sn.Schema == node.Schema {
// have registered
// todo(gorexlv): fulfill the register info?
return
}
}
c.ServiceNodes[node] = newCheckMeta()
return
}
var client = &Client{
AppName: node.AppName,
IP: node.IP,
Port: "",
ServiceNodes: map[*structs.ServiceNode]*CheckMeta{
node: newCheckMeta(),
},
}
eng.clients = append(eng.clients, client)
}
//If the confNode already exists in the client managed by Engine, update the AppConfiguration in time;
//otherwise, add the confNode to the client managed by Engine
func (eng *Engine) upsertConfClient(node *structs.ConfNode) {
for _, c := range eng.clients {
if c.AppName == node.AppName &&
c.AppEnvi == node.AppEnvi &&
c.IP == node.IP {
c.AppConfiguration = node.Configuration
return
}
}
var client = &Client{
AppName: node.AppName,
AppEnvi: node.AppEnvi,
IP: node.IP,
Port: "",
AppConfiguration: node.Configuration,
ServiceNodes: nil,
}
eng.clients = append(eng.clients, client)
}
func (eng *Engine) checkServiceNodes() {
for {
time.Sleep(time.Second)
var eg errgroup.Group
// ping all registered nodes, then flush all node's status into storage
for _, client := range eng.clients {
for node, meta := range client.ServiceNodes {
node := node
meta := meta
if meta.NextCheckTime.Load() > now().Unix() {
continue
}
eg.Go(func() (err error) {
fmt.Printf("node = %+v\n", node)
if err := ping(context.TODO(), node); err != nil {
fmt.Printf("err = %+v\n", err)
meta.NextCheckTime.Add(3) // retry after 3s
// todo(gorexlv): 超过一定次数, deregister service node
} else {
fmt.Printf("err = %+v\n", err)
meta.NextCheckTime.Add(60) // retry after 60s
}
return
})
}
}
if err := eg.Wait(); err != nil {
xlog.Error("group wait", xlog.Any("err", err))
}
}
}
func (eng *Engine) cleanJobs() error {
eng.worker.CleanJobs()
return nil
}