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Commitc7f73d4

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feat: make ServerTailnet set peers lost when it reconnects to the coordinator
1 parent771cdf1 commitc7f73d4

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6 files changed

+314
-6
lines changed

6 files changed

+314
-6
lines changed

‎Makefile‎

Lines changed: 6 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -476,7 +476,9 @@ gen: \
476476
site/e2e/provisionerGenerated.ts\
477477
site/src/theme/icons.json\
478478
examples/examples.gen.json\
479-
tailnet/tailnettest/coordinatormock.go
479+
tailnet/tailnettest/coordinatormock.go\
480+
tailnet/tailnettest/coordinateemock.go\
481+
tailnet/tailnettest/multiagentmock.go
480482
.PHONY: gen
481483

482484
# Mark all generated files as fresh so make thinks they're up-to-date. This is
@@ -504,6 +506,8 @@ gen/mark-fresh:
504506
site/src/theme/icons.json\
505507
examples/examples.gen.json\
506508
tailnet/tailnettest/coordinatormock.go\
509+
tailnet/tailnettest/coordinateemock.go\
510+
tailnet/tailnettest/multiagentmockmock.go\
507511
"
508512
forfilein$$files;do
509513
echo"$$file"
@@ -531,7 +535,7 @@ coderd/database/querier.go: coderd/database/sqlc.yaml coderd/database/dump.sql $
531535
coderd/database/dbmock/dbmock.go: coderd/database/db.go coderd/database/querier.go
532536
go generate ./coderd/database/dbmock/
533537

534-
tailnet/tailnettest/coordinatormock.go: tailnet/coordinator.go
538+
tailnet/tailnettest/coordinatormock.gotailnet/tailnettest/multiagentmock.gotailnet/tailnettest/coordinateemock.go: tailnet/coordinator.go tailnet/multiagent.go
535539
go generate ./tailnet/tailnettest/
536540

537541
tailnet/proto/tailnet.pb.go: tailnet/proto/tailnet.proto

‎coderd/tailnet.go‎

Lines changed: 11 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -95,6 +95,7 @@ func NewServerTailnet(
9595
logger:logger,
9696
tracer:traceProvider.Tracer(tracing.TracerName),
9797
conn:conn,
98+
coordinatee:conn,
9899
getMultiAgent:getMultiAgent,
99100
cache:cache,
100101
agentConnectionTimes:map[uuid.UUID]time.Time{},
@@ -224,13 +225,14 @@ func (s *ServerTailnet) watchAgentUpdates() {
224225
if!ok {
225226
ifconn.IsClosed()&&s.ctx.Err()==nil {
226227
s.logger.Warn(s.ctx,"multiagent closed, reinitializing")
228+
s.coordinatee.SetAllPeersLost()
227229
s.reinitCoordinator()
228230
continue
229231
}
230232
return
231233
}
232234

233-
err:=s.conn.UpdatePeers(resp.GetPeerUpdates())
235+
err:=s.coordinatee.UpdatePeers(resp.GetPeerUpdates())
234236
iferr!=nil {
235237
ifxerrors.Is(err,tailnet.ErrConnClosed) {
236238
s.logger.Warn(context.Background(),"tailnet conn closed, exiting watchAgentUpdates",slog.Error(err))
@@ -280,9 +282,14 @@ type ServerTailnet struct {
280282
cancelfunc()
281283
derpMapUpdaterClosedchanstruct{}
282284

283-
logger slog.Logger
284-
tracer trace.Tracer
285-
conn*tailnet.Conn
285+
logger slog.Logger
286+
tracer trace.Tracer
287+
288+
// in prod, these are the same, but coordinatee is a subset of Conn's
289+
// methods which makes some tests easier.
290+
conn*tailnet.Conn
291+
coordinatee tailnet.Coordinatee
292+
286293
getMultiAgentfunc(context.Context) (tailnet.MultiAgentConn,error)
287294
agentConn atomic.Pointer[tailnet.MultiAgentConn]
288295
cache*wsconncache.Cache

‎coderd/tailnet_internal_test.go‎

Lines changed: 75 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,75 @@
1+
package coderd
2+
3+
import (
4+
"context"
5+
"sync/atomic"
6+
"testing"
7+
"time"
8+
9+
"github.com/google/uuid"
10+
"go.uber.org/mock/gomock"
11+
12+
"cdr.dev/slog"
13+
"cdr.dev/slog/sloggers/slogtest"
14+
"github.com/coder/coder/v2/tailnet"
15+
"github.com/coder/coder/v2/tailnet/tailnettest"
16+
"github.com/coder/coder/v2/testutil"
17+
)
18+
19+
// TestServerTailnet_Reconnect tests that ServerTailnet calls SetAllPeersLost on the Coordinatee
20+
// (tailnet.Conn in production) when it disconnects from the Coordinator (via MultiAgentConn) and
21+
// reconnects.
22+
funcTestServerTailnet_Reconnect(t*testing.T) {
23+
t.Parallel()
24+
logger:=slogtest.Make(t,&slogtest.Options{IgnoreErrors:true}).Leveled(slog.LevelDebug)
25+
ctrl:=gomock.NewController(t)
26+
ctx:=testutil.Context(t,testutil.WaitShort)
27+
28+
mMultiAgent0:=tailnettest.NewMockMultiAgentConn(ctrl)
29+
mMultiAgent1:=tailnettest.NewMockMultiAgentConn(ctrl)
30+
mac:=make(chan tailnet.MultiAgentConn,2)
31+
mac<-mMultiAgent0
32+
mac<-mMultiAgent1
33+
mCoord:=tailnettest.NewMockCoordinatee(ctrl)
34+
35+
uut:=&ServerTailnet{
36+
ctx:ctx,
37+
logger:logger,
38+
coordinatee:mCoord,
39+
getMultiAgent:func(ctx context.Context) (tailnet.MultiAgentConn,error) {
40+
select {
41+
case<-ctx.Done():
42+
returnnil,ctx.Err()
43+
casem:=<-mac:
44+
returnm,nil
45+
}
46+
},
47+
agentConn: atomic.Pointer[tailnet.MultiAgentConn]{},
48+
agentConnectionTimes:make(map[uuid.UUID]time.Time),
49+
}
50+
// reinit the Coordinator once, to load mMultiAgent0
51+
uut.reinitCoordinator()
52+
53+
mMultiAgent0.EXPECT().NextUpdate(gomock.Any()).
54+
Times(1).
55+
Return(nil,false)// this indicates there are no more updates
56+
closed0:=mMultiAgent0.EXPECT().IsClosed().
57+
Times(1).
58+
Return(true)// this triggers reconnect
59+
setLost:=mCoord.EXPECT().SetAllPeersLost().Times(1).After(closed0)
60+
mMultiAgent1.EXPECT().NextUpdate(gomock.Any()).
61+
Times(1).
62+
After(setLost).
63+
Return(nil,false)
64+
mMultiAgent1.EXPECT().IsClosed().
65+
Times(1).
66+
Return(false)// this causes us to exit and not reconnect
67+
68+
done:=make(chanstruct{})
69+
gofunc() {
70+
uut.watchAgentUpdates()
71+
close(done)
72+
}()
73+
74+
testutil.RequireRecvCtx(ctx,t,done)
75+
}

‎tailnet/tailnettest/coordinateemock.go‎

Lines changed: 79 additions & 0 deletions
Some generated files are not rendered by default. Learn more aboutcustomizing how changed files appear on GitHub.

‎tailnet/tailnettest/multiagentmock.go‎

Lines changed: 141 additions & 0 deletions
Some generated files are not rendered by default. Learn more aboutcustomizing how changed files appear on GitHub.

‎tailnet/tailnettest/tailnettest.go‎

Lines changed: 2 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -21,7 +21,9 @@ import (
2121
"github.com/coder/coder/v2/tailnet"
2222
)
2323

24+
//go:generate mockgen -destination ./multiagentmock.go -package tailnettest github.com/coder/coder/v2/tailnet MultiAgentConn
2425
//go:generate mockgen -destination ./coordinatormock.go -package tailnettest github.com/coder/coder/v2/tailnet Coordinator
26+
//go:generate mockgen -destination ./coordinateemock.go -package tailnettest github.com/coder/coder/v2/tailnet Coordinatee
2527

2628
// RunDERPAndSTUN creates a DERP mapping for tests.
2729
funcRunDERPAndSTUN(t*testing.T) (*tailcfg.DERPMap,*derp.Server) {

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