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server.go
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server.go
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package authzserver
import (
"context"
"log"
"github.com/pkg/errors"
"github.com/skeleton1231/go-iam-ecommerce-microservice/pkg/shutdown"
"github.com/skeleton1231/go-iam-ecommerce-microservice/pkg/shutdown/shutdownmanagers/posixsignal"
"github.com/skeleton1231/go-iam-ecommerce-microservice/pkg/storage"
"github.com/skeleton1231/go-iam-ecommerce-microservice/internal/authzserver/analytics"
"github.com/skeleton1231/go-iam-ecommerce-microservice/internal/authzserver/config"
"github.com/skeleton1231/go-iam-ecommerce-microservice/internal/authzserver/load"
"github.com/skeleton1231/go-iam-ecommerce-microservice/internal/authzserver/load/cache"
"github.com/skeleton1231/go-iam-ecommerce-microservice/internal/authzserver/store/apiserver"
genericoptions "github.com/skeleton1231/go-iam-ecommerce-microservice/internal/pkg/options"
genericapiserver "github.com/skeleton1231/go-iam-ecommerce-microservice/internal/pkg/server"
)
// RedisKeyPrefix defines the prefix key in redis for analytics data.
const RedisKeyPrefix = "analytics-"
type authzServer struct {
gs *shutdown.GracefulShutdown
rpcServer string
clientCA string
redisOptions *genericoptions.RedisOptions
genericAPIServer *genericapiserver.GenericAPIServer
analyticsOptions *analytics.AnalyticsOptions
redisCancelFunc context.CancelFunc
}
type preparedAuthzServer struct {
*authzServer
}
// func createAuthzServer(cfg *config.Config) (*authzServer, error) {.
func createAuthzServer(cfg *config.Config) (*authzServer, error) {
gs := shutdown.New()
gs.AddShutdownManager(posixsignal.NewPosixSignalManager())
genericConfig, err := buildGenericConfig(cfg)
if err != nil {
return nil, err
}
genericServer, err := genericConfig.Complete().New()
if err != nil {
return nil, err
}
server := &authzServer{
gs: gs,
redisOptions: cfg.RedisOptions,
analyticsOptions: cfg.AnalyticsOptions,
rpcServer: cfg.RPCServer,
clientCA: cfg.ClientCA,
genericAPIServer: genericServer,
}
return server, nil
}
func (s *authzServer) PrepareRun() preparedAuthzServer {
_ = s.initialize()
initRouter(s.genericAPIServer.Engine)
return preparedAuthzServer{s}
}
func (s *authzServer) initialize() error {
ctx, cancel := context.WithCancel(context.Background())
s.redisCancelFunc = cancel
// keep redis connected
go storage.ConnectToRedis(ctx, s.buildStorageConfig())
// cron to reload all secrets and policies from iam-apiserver
cacheIns, err := cache.GetCacheInsOr(apiserver.GetAPIServerFactoryOrDie(s.rpcServer, s.clientCA))
if err != nil {
return errors.Wrap(err, "get cache instance failed")
}
load.NewLoader(ctx, cacheIns).Start()
// start analytics service
if s.analyticsOptions.Enable {
analyticsStore := storage.RedisCluster{KeyPrefix: RedisKeyPrefix}
analyticsIns := analytics.NewAnalytics(s.analyticsOptions, &analyticsStore)
analyticsIns.Start()
}
return nil
}
// Run start to run AuthzServer.
func (s preparedAuthzServer) Run() error {
stopCh := make(chan struct{})
// start shutdown managers
if err := s.gs.Start(); err != nil {
log.Fatalf("start shutdown manager failed: %s", err.Error())
}
//nolint: errcheck
go s.genericAPIServer.Run()
// in order to ensure that the reported data is not lost,
// please ensure the following graceful shutdown sequence
s.gs.AddShutdownCallback(shutdown.ShutdownFunc(func(string) error {
s.genericAPIServer.Close()
if s.analyticsOptions.Enable {
analytics.GetAnalytics().Stop()
}
s.redisCancelFunc()
return nil
}))
// blocking here via channel to prevents the process exit.
<-stopCh
return nil
}
func buildGenericConfig(cfg *config.Config) (genericConfig *genericapiserver.Config, lastErr error) {
genericConfig = genericapiserver.NewConfig()
if lastErr = cfg.GenericServerRunOptions.ApplyTo(genericConfig); lastErr != nil {
return
}
if lastErr = cfg.FeatureOptions.ApplyTo(genericConfig); lastErr != nil {
return
}
if lastErr = cfg.SecureServing.ApplyTo(genericConfig); lastErr != nil {
return
}
if lastErr = cfg.InsecureServing.ApplyTo(genericConfig); lastErr != nil {
return
}
return
}
func (s *authzServer) buildStorageConfig() *storage.Config {
return &storage.Config{
Host: s.redisOptions.Host,
Port: s.redisOptions.Port,
Addrs: s.redisOptions.Addrs,
MasterName: s.redisOptions.MasterName,
Username: s.redisOptions.Username,
Password: s.redisOptions.Password,
Database: s.redisOptions.Database,
MaxIdle: s.redisOptions.MaxIdle,
MaxActive: s.redisOptions.MaxActive,
Timeout: s.redisOptions.Timeout,
EnableCluster: s.redisOptions.EnableCluster,
UseSSL: s.redisOptions.UseSSL,
SSLInsecureSkipVerify: s.redisOptions.SSLInsecureSkipVerify,
}
}