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Commit8fee00d

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feat: agent uses Tailnet v2 API for DERPMap updates
1 parent5fa6879 commit8fee00d

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8 files changed

+106
-196
lines changed

8 files changed

+106
-196
lines changed

‎agent/agent.go‎

Lines changed: 34 additions & 37 deletions
Original file line numberDiff line numberDiff line change
@@ -89,7 +89,6 @@ type Options struct {
8989
typeClientinterface {
9090
Manifest(ctx context.Context) (agentsdk.Manifest,error)
9191
Listen(ctx context.Context) (drpc.Conn,error)
92-
DERPMapUpdates(ctx context.Context) (<-chan agentsdk.DERPMapUpdate, io.Closer,error)
9392
ReportStats(ctx context.Context,log slog.Logger,statsChan<-chan*agentsdk.Stats,setIntervalfunc(time.Duration)) (io.Closer,error)
9493
PostLifecycle(ctx context.Context,state agentsdk.PostLifecycleRequest)error
9594
PostAppHealth(ctx context.Context,req agentsdk.PostAppHealthsRequest)error
@@ -822,10 +821,22 @@ func (a *agent) run(ctx context.Context) error {
822821
network.SetBlockEndpoints(manifest.DisableDirectConnections)
823822
}
824823

824+
// Listen returns the dRPC connection we use for both Coordinator and DERPMap updates
825+
conn,err:=a.client.Listen(ctx)
826+
iferr!=nil {
827+
returnerr
828+
}
829+
deferfunc() {
830+
cErr:=conn.Close()
831+
ifcErr!=nil {
832+
a.logger.Debug(ctx,"error closing drpc connection",slog.Error(err))
833+
}
834+
}()
835+
825836
eg,egCtx:=errgroup.WithContext(ctx)
826837
eg.Go(func()error {
827838
a.logger.Debug(egCtx,"running tailnet connection coordinator")
828-
err:=a.runCoordinator(egCtx,network)
839+
err:=a.runCoordinator(egCtx,conn,network)
829840
iferr!=nil {
830841
returnxerrors.Errorf("run coordinator: %w",err)
831842
}
@@ -834,7 +845,7 @@ func (a *agent) run(ctx context.Context) error {
834845

835846
eg.Go(func()error {
836847
a.logger.Debug(egCtx,"running derp map subscriber")
837-
err:=a.runDERPMapSubscriber(egCtx,network)
848+
err:=a.runDERPMapSubscriber(egCtx,conn,network)
838849
iferr!=nil {
839850
returnxerrors.Errorf("run derp map subscriber: %w",err)
840851
}
@@ -1056,21 +1067,8 @@ func (a *agent) createTailnet(ctx context.Context, agentID uuid.UUID, derpMap *t
10561067

10571068
// runCoordinator runs a coordinator and returns whether a reconnect
10581069
// should occur.
1059-
func (a*agent)runCoordinator(ctx context.Context,network*tailnet.Conn)error {
1060-
ctx,cancel:=context.WithCancel(ctx)
1061-
defercancel()
1062-
1063-
conn,err:=a.client.Listen(ctx)
1064-
iferr!=nil {
1065-
returnerr
1066-
}
1067-
deferfunc() {
1068-
cErr:=conn.Close()
1069-
ifcErr!=nil {
1070-
a.logger.Debug(ctx,"error closing drpc connection",slog.Error(err))
1071-
}
1072-
}()
1073-
1070+
func (a*agent)runCoordinator(ctx context.Context,conn drpc.Conn,network*tailnet.Conn)error {
1071+
defera.logger.Debug(ctx,"disconnected from coordination RPC")
10741072
tClient:=tailnetproto.NewDRPCTailnetClient(conn)
10751073
coordinate,err:=tClient.Coordinate(ctx)
10761074
iferr!=nil {
@@ -1082,7 +1080,7 @@ func (a *agent) runCoordinator(ctx context.Context, network *tailnet.Conn) error
10821080
a.logger.Debug(ctx,"error closing Coordinate client",slog.Error(err))
10831081
}
10841082
}()
1085-
a.logger.Info(ctx,"connected to coordinationendpoint")
1083+
a.logger.Info(ctx,"connected to coordinationRPC")
10861084
coordination:=tailnet.NewRemoteCoordination(a.logger,coordinate,network,uuid.Nil)
10871085
select {
10881086
case<-ctx.Done():
@@ -1093,30 +1091,29 @@ func (a *agent) runCoordinator(ctx context.Context, network *tailnet.Conn) error
10931091
}
10941092

10951093
// runDERPMapSubscriber runs a coordinator and returns if a reconnect should occur.
1096-
func (a*agent)runDERPMapSubscriber(ctx context.Context,network*tailnet.Conn)error {
1094+
func (a*agent)runDERPMapSubscriber(ctx context.Context,conn drpc.Conn,network*tailnet.Conn)error {
1095+
defera.logger.Debug(ctx,"disconnected from derp map RPC")
10971096
ctx,cancel:=context.WithCancel(ctx)
10981097
defercancel()
1099-
1100-
updates,closer,err:=a.client.DERPMapUpdates(ctx)
1098+
tClient:=tailnetproto.NewDRPCTailnetClient(conn)
1099+
stream,err:=tClient.StreamDERPMaps(ctx,&tailnetproto.StreamDERPMapsRequest{})
11011100
iferr!=nil {
1102-
returnerr
1101+
returnxerrors.Errorf("stream DERP Maps: %w",err)
11031102
}
1104-
defercloser.Close()
1105-
1106-
a.logger.Info(ctx,"connected to derp map endpoint")
1103+
deferfunc() {
1104+
cErr:=stream.Close()
1105+
ifcErr!=nil {
1106+
a.logger.Debug(ctx,"error closing DERPMap stream",slog.Error(err))
1107+
}
1108+
}()
1109+
a.logger.Info(ctx,"connected to derp map RPC")
11071110
for {
1108-
select {
1109-
case<-ctx.Done():
1110-
returnctx.Err()
1111-
caseupdate:=<-updates:
1112-
ifupdate.Err!=nil {
1113-
returnupdate.Err
1114-
}
1115-
ifupdate.DERPMap!=nil&&!tailnet.CompareDERPMaps(network.DERPMap(),update.DERPMap) {
1116-
a.logger.Info(ctx,"updating derp map due to detected changes")
1117-
network.SetDERPMap(update.DERPMap)
1118-
}
1111+
dmp,err:=stream.Recv()
1112+
iferr!=nil {
1113+
returnxerrors.Errorf("recv DERPMap error: %w",err)
11191114
}
1115+
dm:=tailnet.DERPMapFromProto(dmp)
1116+
network.SetDERPMap(dm)
11201117
}
11211118
}
11221119

‎agent/agent_test.go‎

Lines changed: 12 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -1349,6 +1349,7 @@ func TestAgent_Lifecycle(t *testing.T) {
13491349
make(chan*agentsdk.Stats,50),
13501350
tailnet.NewCoordinator(logger),
13511351
)
1352+
deferclient.Close()
13521353

13531354
fs:=afero.NewMemMapFs()
13541355
agent:=agent.New(agent.Options{
@@ -1683,13 +1684,18 @@ func TestAgent_UpdatedDERP(t *testing.T) {
16831684
statsCh,
16841685
coordinator,
16851686
)
1687+
t.Cleanup(func() {
1688+
t.Log("closing client")
1689+
client.Close()
1690+
})
16861691
uut:=agent.New(agent.Options{
16871692
Client:client,
16881693
Filesystem:fs,
16891694
Logger:logger.Named("agent"),
16901695
ReconnectingPTYTimeout:time.Minute,
16911696
})
16921697
t.Cleanup(func() {
1698+
t.Log("closing agent")
16931699
_=uut.Close()
16941700
})
16951701

@@ -1718,6 +1724,7 @@ func TestAgent_UpdatedDERP(t *testing.T) {
17181724
iferr!=nil {
17191725
t.Logf("error closing in-memory coordination: %s",err.Error())
17201726
}
1727+
t.Logf("closed coordination %s",name)
17211728
})
17221729
// Force DERP.
17231730
conn.SetBlockEndpoints(true)
@@ -1753,11 +1760,9 @@ func TestAgent_UpdatedDERP(t *testing.T) {
17531760
}
17541761

17551762
// Push a new DERP map to the agent.
1756-
err:=client.PushDERPMapUpdate(agentsdk.DERPMapUpdate{
1757-
DERPMap:newDerpMap,
1758-
})
1763+
err:=client.PushDERPMapUpdate(newDerpMap)
17591764
require.NoError(t,err)
1760-
t.Logf("client PushedDERPMap update")
1765+
t.Logf("pushedDERPMap update to agent")
17611766

17621767
require.Eventually(t,func()bool {
17631768
conn:=uut.TailnetConn()
@@ -1826,6 +1831,7 @@ func TestAgent_Reconnect(t *testing.T) {
18261831
statsCh,
18271832
coordinator,
18281833
)
1834+
deferclient.Close()
18291835
initialized:= atomic.Int32{}
18301836
closer:=agent.New(agent.Options{
18311837
ExchangeToken:func(ctx context.Context) (string,error) {
@@ -1862,6 +1868,7 @@ func TestAgent_WriteVSCodeConfigs(t *testing.T) {
18621868
make(chan*agentsdk.Stats,50),
18631869
coordinator,
18641870
)
1871+
deferclient.Close()
18651872
filesystem:=afero.NewMemMapFs()
18661873
closer:=agent.New(agent.Options{
18671874
ExchangeToken:func(ctx context.Context) (string,error) {
@@ -2039,6 +2046,7 @@ func setupAgent(t *testing.T, metadata agentsdk.Manifest, ptyTimeout time.Durati
20392046
statsCh:=make(chan*agentsdk.Stats,50)
20402047
fs:=afero.NewMemMapFs()
20412048
c:=agenttest.NewClient(t,logger.Named("agent"),metadata.AgentID,metadata,statsCh,coordinator)
2049+
t.Cleanup(c.Close)
20422050

20432051
options:= agent.Options{
20442052
Client:c,

‎agent/agenttest/client.go‎

Lines changed: 15 additions & 21 deletions
Original file line numberDiff line numberDiff line change
@@ -39,12 +39,12 @@ func NewClient(t testing.TB,
3939
coordPtr:= atomic.Pointer[tailnet.Coordinator]{}
4040
coordPtr.Store(&coordinator)
4141
mux:=drpcmux.New()
42+
derpMapUpdates:=make(chan*tailcfg.DERPMap)
4243
drpcService:=&tailnet.DRPCService{
43-
CoordPtr:&coordPtr,
44-
Logger:logger,
45-
// TODO: handle DERPMap too!
46-
DerpMapUpdateFrequency:time.Hour,
47-
DerpMapFn:func()*tailcfg.DERPMap {panic("not implemented") },
44+
CoordPtr:&coordPtr,
45+
Logger:logger,
46+
DerpMapUpdateFrequency:time.Microsecond,
47+
DerpMapFn:func()*tailcfg.DERPMap {return<-derpMapUpdates },
4848
}
4949
err:=proto.DRPCRegisterTailnet(mux,drpcService)
5050
require.NoError(t,err)
@@ -64,7 +64,7 @@ func NewClient(t testing.TB,
6464
statsChan:statsChan,
6565
coordinator:coordinator,
6666
server:server,
67-
derpMapUpdates:make(chan agentsdk.DERPMapUpdate),
67+
derpMapUpdates:derpMapUpdates,
6868
}
6969
}
7070

@@ -85,23 +85,26 @@ type Client struct {
8585
lifecycleStates []codersdk.WorkspaceAgentLifecycle
8686
startup agentsdk.PostStartupRequest
8787
logs []agentsdk.Log
88-
derpMapUpdateschan agentsdk.DERPMapUpdate
88+
derpMapUpdateschan*tailcfg.DERPMap
89+
derpMapOnce sync.Once
90+
}
91+
92+
func (c*Client)Close() {
93+
c.derpMapOnce.Do(func() {close(c.derpMapUpdates) })
8994
}
9095

9196
func (c*Client)Manifest(_ context.Context) (agentsdk.Manifest,error) {
9297
returnc.manifest,nil
9398
}
9499

95-
func (c*Client)Listen(_ context.Context) (drpc.Conn,error) {
100+
func (c*Client)Listen(ctx context.Context) (drpc.Conn,error) {
96101
conn,lis:=drpcsdk.MemTransportPipe()
97-
closed:=make(chanstruct{})
98102
c.LastWorkspaceAgent=func() {
99103
_=conn.Close()
100104
_=lis.Close()
101-
<-closed
102105
}
103106
c.t.Cleanup(c.LastWorkspaceAgent)
104-
serveCtx,cancel:=context.WithCancel(context.Background())
107+
serveCtx,cancel:=context.WithCancel(ctx)
105108
c.t.Cleanup(cancel)
106109
auth:= tailnet.AgentTunnelAuth{}
107110
streamID:= tailnet.StreamID{
@@ -112,7 +115,6 @@ func (c *Client) Listen(_ context.Context) (drpc.Conn, error) {
112115
serveCtx=tailnet.WithStreamID(serveCtx,streamID)
113116
gofunc() {
114117
_=c.server.Serve(serveCtx,lis)
115-
close(closed)
116118
}()
117119
returnconn,nil
118120
}
@@ -235,7 +237,7 @@ func (c *Client) GetServiceBanner(ctx context.Context) (codersdk.ServiceBannerCo
235237
return codersdk.ServiceBannerConfig{},nil
236238
}
237239

238-
func (c*Client)PushDERPMapUpdate(updateagentsdk.DERPMapUpdate)error {
240+
func (c*Client)PushDERPMapUpdate(update*tailcfg.DERPMap)error {
239241
timer:=time.NewTimer(testutil.WaitShort)
240242
defertimer.Stop()
241243
select {
@@ -247,14 +249,6 @@ func (c *Client) PushDERPMapUpdate(update agentsdk.DERPMapUpdate) error {
247249
returnnil
248250
}
249251

250-
func (c*Client)DERPMapUpdates(_ context.Context) (<-chan agentsdk.DERPMapUpdate, io.Closer,error) {
251-
closed:=make(chanstruct{})
252-
returnc.derpMapUpdates,closeFunc(func()error {
253-
close(closed)
254-
returnnil
255-
}),nil
256-
}
257-
258252
typecloseFuncfunc()error
259253

260254
func (ccloseFunc)Close()error {

‎coderd/tailnet_test.go‎

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -178,6 +178,7 @@ func setupAgent(t *testing.T, agentAddresses []netip.Prefix) (uuid.UUID, agent.A
178178
})
179179

180180
c:=agenttest.NewClient(t,logger,manifest.AgentID,manifest,make(chan*agentsdk.Stats,50),coord)
181+
t.Cleanup(c.Close)
181182

182183
options:= agent.Options{
183184
Client:c,

‎coderd/wsconncache/wsconncache_test.go‎

Lines changed: 23 additions & 33 deletions
Original file line numberDiff line numberDiff line change
@@ -171,13 +171,16 @@ func setupAgent(t *testing.T, manifest agentsdk.Manifest, ptyTimeout time.Durati
171171
_=coordinator.Close()
172172
})
173173
manifest.AgentID=uuid.New()
174+
aC:=&client{
175+
t:t,
176+
agentID:manifest.AgentID,
177+
manifest:manifest,
178+
coordinator:coordinator,
179+
derpMapUpdates:make(chan*tailcfg.DERPMap),
180+
}
181+
t.Cleanup(aC.close)
174182
closer:=agent.New(agent.Options{
175-
Client:&client{
176-
t:t,
177-
agentID:manifest.AgentID,
178-
manifest:manifest,
179-
coordinator:coordinator,
180-
},
183+
Client:aC,
181184
Logger:logger.Named("agent"),
182185
ReconnectingPTYTimeout:ptyTimeout,
183186
Addresses: []netip.Prefix{netip.PrefixFrom(codersdk.WorkspaceAgentIP,128)},
@@ -230,32 +233,20 @@ func setupAgent(t *testing.T, manifest agentsdk.Manifest, ptyTimeout time.Durati
230233
}
231234

232235
typeclientstruct {
233-
t*testing.T
234-
agentID uuid.UUID
235-
manifest agentsdk.Manifest
236-
coordinator tailnet.Coordinator
237-
}
238-
239-
func (c*client)Manifest(_ context.Context) (agentsdk.Manifest,error) {
240-
returnc.manifest,nil
236+
t*testing.T
237+
agentID uuid.UUID
238+
manifest agentsdk.Manifest
239+
coordinator tailnet.Coordinator
240+
closeOnce sync.Once
241+
derpMapUpdateschan*tailcfg.DERPMap
241242
}
242243

243-
typecloserstruct {
244-
closeFuncfunc()error
244+
func (c*client)close() {
245+
c.closeOnce.Do(func(){close(c.derpMapUpdates) })
245246
}
246247

247-
func (c*closer)Close()error {
248-
returnc.closeFunc()
249-
}
250-
251-
func (*client)DERPMapUpdates(_ context.Context) (<-chan agentsdk.DERPMapUpdate, io.Closer,error) {
252-
closed:=make(chanstruct{})
253-
returnmake(<-chan agentsdk.DERPMapUpdate),&closer{
254-
closeFunc:func()error {
255-
close(closed)
256-
returnnil
257-
},
258-
},nil
248+
func (c*client)Manifest(_ context.Context) (agentsdk.Manifest,error) {
249+
returnc.manifest,nil
259250
}
260251

261252
func (c*client)Listen(_ context.Context) (drpc.Conn,error) {
@@ -271,11 +262,10 @@ func (c *client) Listen(_ context.Context) (drpc.Conn, error) {
271262
coordPtr.Store(&c.coordinator)
272263
mux:=drpcmux.New()
273264
drpcService:=&tailnet.DRPCService{
274-
CoordPtr:&coordPtr,
275-
Logger:logger,
276-
// TODO: handle DERPMap too!
277-
DerpMapUpdateFrequency:time.Hour,
278-
DerpMapFn:func()*tailcfg.DERPMap {panic("not implemented") },
265+
CoordPtr:&coordPtr,
266+
Logger:logger,
267+
DerpMapUpdateFrequency:time.Microsecond,
268+
DerpMapFn:func()*tailcfg.DERPMap {return<-c.derpMapUpdates },
279269
}
280270
err:=proto.DRPCRegisterTailnet(mux,drpcService)
281271
iferr!=nil {

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