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server.go
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server.go
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package wsserver
import (
"crypto/tls"
"crypto/x509"
"fmt"
"log"
"net/http"
"os"
"strings"
bhLog "github.com/kubeedge/beehive/pkg/common/log"
"github.com/kubeedge/kubeedge/cloud/pkg/cloudhub/channelq"
"github.com/kubeedge/kubeedge/cloud/pkg/cloudhub/common/util"
"github.com/kubeedge/kubeedge/cloud/pkg/cloudhub/handler"
"github.com/gorilla/mux"
)
// constants for api path
const (
PathEvent = "/{project_id}/{node_id}/events"
)
// FilterWriter filter writer
type FilterWriter struct{}
func (f *FilterWriter) Write(p []byte) (n int, err error) {
output := string(p)
if strings.Contains(output, "http: TLS handshake error from") {
return 0, nil
}
return os.Stderr.Write(p)
}
// StartCloudHub starts the cloud hub service
func StartCloudHub(config *util.Config, eventq *channelq.ChannelEventQueue) error {
// init certificate
pool := x509.NewCertPool()
ok := pool.AppendCertsFromPEM(config.Ca)
if !ok {
return fmt.Errorf("fail to load ca content")
}
cert, err := tls.X509KeyPair(config.Cert, config.Key)
if err != nil {
return err
}
tlsConfig := tls.Config{
ClientCAs: pool,
ClientAuth: tls.RequestClientCert,
Certificates: []tls.Certificate{cert},
MinVersion: tls.VersionTLS12,
CipherSuites: []uint16{tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256},
}
// init handler
handler.WebSocketHandler = &handler.WebsocketHandle{
EventHandler: &handler.EventHandle{
KeepaliveInterval: config.KeepaliveInterval,
WriteTimeout: config.WriteTimeout,
EventQueue: eventq,
},
NodeLimit: config.NodeLimit,
}
handler.WebSocketHandler.EventHandler.Handlers = []handler.HandleFunc{handler.WebSocketHandler.EventReadLoop, handler.WebSocketHandler.EventWriteLoop}
router := mux.NewRouter()
router.HandleFunc(PathEvent, handler.WebSocketHandler.ServeEvent)
// start server
s := http.Server{
Addr: fmt.Sprintf("%s:%d", config.Address, config.Port),
Handler: router,
TLSConfig: &tlsConfig,
ErrorLog: log.New(&FilterWriter{}, "", log.LstdFlags),
}
bhLog.LOGGER.Infof("Start cloud hub websocket server")
go s.ListenAndServeTLS("", "")
return nil
}