/
proxy.go
158 lines (147 loc) · 3.99 KB
/
proxy.go
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package action
import (
"fmt"
"io"
log "github.com/sirupsen/logrus"
"github.com/spf13/pflag"
"k8s.io/utils/ptr"
"github.com/wencaiwulue/kubevpn/v2/pkg/config"
"github.com/wencaiwulue/kubevpn/v2/pkg/daemon/rpc"
"github.com/wencaiwulue/kubevpn/v2/pkg/handler"
"github.com/wencaiwulue/kubevpn/v2/pkg/util"
)
// Proxy
// 1. if not connect to cluster
// 1.1 connect to cluster
// 1.2 proxy workloads
// 2. if already connect to cluster
// 2.1 disconnect from cluster
// 2.2 same as step 1
func (svr *Server) Proxy(req *rpc.ConnectRequest, resp rpc.Daemon_ProxyServer) error {
out := io.MultiWriter(newProxyWarp(resp), svr.LogFile)
log.SetOutput(out)
defer func() {
log.SetOutput(svr.LogFile)
log.SetLevel(log.DebugLevel)
}()
config.Image = req.Image
config.Debug = req.Level == int32(log.DebugLevel)
log.SetLevel(log.InfoLevel)
ctx := resp.Context()
connect := &handler.ConnectOptions{
Namespace: req.Namespace,
Headers: req.Headers,
PortMap: req.PortMap,
Workloads: req.Workloads,
ExtraRouteInfo: *handler.ParseExtraRouteFromRPC(req.ExtraRoute),
Engine: config.Engine(req.Engine),
OriginKubeconfigPath: req.OriginKubeconfigPath,
}
var sshConf = util.ParseSshFromRPC(req.SshJump)
file, err := util.ConvertToTempKubeconfigFile([]byte(req.KubeconfigBytes))
if err != nil {
return err
}
flags := pflag.NewFlagSet("", pflag.ContinueOnError)
flags.AddFlag(&pflag.Flag{
Name: "kubeconfig",
DefValue: file,
})
var path string
path, err = util.SshJump(ctx, sshConf, flags, false)
if err != nil {
return err
}
err = connect.InitClient(util.InitFactoryByPath(path, req.Namespace))
if err != nil {
return err
}
err = connect.PreCheckResource()
if err != nil {
return err
}
daemonClient := svr.GetClient(false)
if daemonClient == nil {
return fmt.Errorf("daemon is not avaliable")
}
if svr.connect != nil {
var isSameCluster bool
isSameCluster, err = util.IsSameCluster(
svr.connect.GetClientset().CoreV1().ConfigMaps(svr.connect.Namespace), svr.connect.Namespace,
connect.GetClientset().CoreV1().ConfigMaps(connect.Namespace), connect.Namespace,
)
if err == nil && isSameCluster && svr.connect.Equal(connect) {
// same cluster, do nothing
log.Infof("already connect to cluster")
} else {
log.Infof("try to disconnect from another cluster")
var disconnect rpc.Daemon_DisconnectClient
disconnect, err = daemonClient.Disconnect(ctx, &rpc.DisconnectRequest{
KubeconfigBytes: ptr.To(req.KubeconfigBytes),
Namespace: ptr.To(connect.Namespace),
SshJump: sshConf.ToRPC(),
})
if err != nil {
return err
}
var recv *rpc.DisconnectResponse
for {
recv, err = disconnect.Recv()
if err == io.EOF {
break
} else if err != nil {
log.Errorf("recv from disconnect failed, %v", err)
return err
}
err = resp.Send(&rpc.ConnectResponse{Message: recv.Message})
if err != nil {
return err
}
}
log.SetOutput(out)
}
}
if svr.connect == nil {
log.Infof("connectting to cluster")
var connResp rpc.Daemon_ConnectClient
connResp, err = daemonClient.Connect(ctx, req)
if err != nil {
return err
}
var recv *rpc.ConnectResponse
for {
recv, err = connResp.Recv()
if err == io.EOF {
break
} else if err != nil {
return err
}
err = resp.Send(recv)
if err != nil {
return err
}
}
log.SetOutput(out)
}
svr.connect.Workloads = req.Workloads
svr.connect.Headers = req.Headers
svr.connect.PortMap = req.PortMap
err = svr.connect.CreateRemoteInboundPod(ctx)
if err != nil {
log.Errorf("create remote inbound pod failed: %s", err.Error())
return err
}
return nil
}
type proxyWarp struct {
server rpc.Daemon_ProxyServer
}
func (r *proxyWarp) Write(p []byte) (n int, err error) {
err = r.server.Send(&rpc.ConnectResponse{
Message: string(p),
})
return len(p), err
}
func newProxyWarp(server rpc.Daemon_ProxyServer) io.Writer {
return &proxyWarp{server: server}
}