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server.go
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server.go
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package apiserver
import (
"context"
"fmt"
"log"
pb "github.com/rose839/IAM/api/proto/apiserver/v1"
"github.com/rose839/IAM/internal/apiserver/config"
cachev1 "github.com/rose839/IAM/internal/apiserver/controller/v1/cache"
"github.com/rose839/IAM/internal/apiserver/store"
"github.com/rose839/IAM/internal/apiserver/store/mysql"
genericoptions "github.com/rose839/IAM/internal/pkg/options"
genericapiserver "github.com/rose839/IAM/internal/pkg/server"
"github.com/rose839/IAM/pkg/shutdown"
"github.com/rose839/IAM/pkg/shutdown/shutdownmanagers/posixsignal"
"github.com/rose839/IAM/pkg/storage"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
"google.golang.org/grpc/reflection"
)
// apiServer represent iam apiserver runtime instance.
type apiServer struct {
gs *shutdown.GracefulShutdown // graceful shutdown instance
redisOptions *genericoptions.RedisOptions // redis options
genericAPIServer *genericapiserver.GenericAPIServer // rest api server
gRPCAPIServer *grpcAPIServer // grpc server
}
// preparedAPIServer represent an iam apiserver runtime instance that is prepared.
type preparedAPIServer struct {
*apiServer
}
// ExtraConfig defines extra configuration for the iam-apiserver.
type ExtraConfig struct {
Addr string // grpc address
MaxMsgSize int // grpc max message size
ServerCert genericoptions.GeneratableKeyCert
MySQLOptions *genericoptions.MySQLOptions
}
// Create rest api server config from app config.
func buildGenericConfig(cfg *config.Config) (genericConfig *genericapiserver.Config, err error) {
genericConfig = genericapiserver.NewConfig()
if err = cfg.GenericServerRunOptions.ApplyTo(genericConfig); err != nil {
return
}
if err = cfg.FeatureOptions.ApplyTo(genericConfig); err != nil {
return
}
if err = cfg.SecureServing.ApplyTo(genericConfig); err != nil {
return
}
if err = cfg.InsecureServing.ApplyTo(genericConfig); err != nil {
return
}
return
}
func buildExtraConfig(cfg *config.Config) (*ExtraConfig, error) {
return &ExtraConfig{
Addr: fmt.Sprintf("%s:%d", cfg.GRPCOptions.BindAddress, cfg.GRPCOptions.BindPort),
MaxMsgSize: cfg.GRPCOptions.MaxMsgSize,
ServerCert: cfg.SecureServing.ServerCert,
MySQLOptions: cfg.MySQLOptions,
}, nil
}
// Create iam apiserver instance.
func createAPIServer(cfg *config.Config) (*apiServer, error) {
gs := shutdown.New()
gs.AddShutdownManager(posixsignal.NewPosixSignalManager())
genericConfig, err := buildGenericConfig(cfg)
if err != nil {
return nil, err
}
extraConfig, err := buildExtraConfig(cfg)
if err != nil {
return nil, err
}
genericServer, err := genericConfig.Complete().New()
if err != nil {
return nil, err
}
extraServer, err := extraConfig.complete().New()
if err != nil {
return nil, err
}
server := &apiServer{
gs: gs,
redisOptions: cfg.RedisOptions,
genericAPIServer: genericServer,
gRPCAPIServer: extraServer,
}
return server, nil
}
// do some prepare work on apiserver object.
func (s *apiServer) PrepareRun() preparedAPIServer {
// init rest api server router
initRouter(s.genericAPIServer.Engine)
// init redis connection
s.initRedisStore()
// add graceful shutdown callback
s.gs.AddShutdownCallback(shutdown.ShutdownFunc(func(string) error {
// close mysql connection
mysqlStore, _ := mysql.GetMySQLFactoryOr(nil)
if mysqlStore != nil {
return mysqlStore.Close()
}
// close rest api server and grpc server
s.genericAPIServer.Close()
s.gRPCAPIServer.Close()
return nil
}))
return preparedAPIServer{s}
}
// start api server
func (s preparedAPIServer) Run() error {
// start rpc server
go s.gRPCAPIServer.Run()
// start shutdown managers
if err := s.gs.Start(); err != nil {
log.Fatalf("start shutdown manager failed: %s", err.Error())
}
// this will block until api server close
s.genericAPIServer.Run()
return nil
}
type completedExtraConfig struct {
*ExtraConfig
}
func (c *ExtraConfig) complete() *completedExtraConfig {
if c.Addr == "" {
c.Addr = "127.0.0.1:8081"
}
return &completedExtraConfig{c}
}
// New create a grpcAPIServer instance.
func (c *completedExtraConfig) New() (*grpcAPIServer, error) {
// create grpc encryption communication
creds, err := credentials.NewServerTLSFromFile(c.ServerCert.CertKey.CertFile, c.ServerCert.CertKey.KeyFile)
if err != nil {
log.Fatalf("Failed to generate credentials: %s", err.Error())
}
// create grpc server
opts := []grpc.ServerOption{grpc.MaxRecvMsgSize(c.MaxMsgSize), grpc.Creds(creds)}
grpcServer := grpc.NewServer(opts...)
// create mysql store instance
storeIns, _ := mysql.GetMySQLFactoryOr(c.MySQLOptions)
store.SetClient(storeIns)
// create grpc instance
cacheIns, err := cachev1.GetCacheInsOr(storeIns)
if err != nil {
}
// register grpc server
pb.RegisterCacheServer(grpcServer, cacheIns)
// register grpc reflcetion server to enable grpcurl and grpc Swagger test
reflection.Register(grpcServer)
return &grpcAPIServer{grpcServer, c.Addr}, nil
}
func (s *apiServer) initRedisStore() {
ctx, cancle := context.WithCancel(context.Background())
s.gs.AddShutdownCallback(shutdown.ShutdownFunc(func(string) error {
cancle()
return nil
}))
config := &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,
}
// try to connect to redis
go storage.ConnectToRedis(ctx, config)
}