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Commit65c6d88

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committed
move back under scaletest cmd
1 parentfafca95 commit65c6d88

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5 files changed

+343
-373
lines changed

5 files changed

+343
-373
lines changed

‎cli/root.go

Lines changed: 0 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -105,7 +105,6 @@ func (r *RootCmd) Core() []*clibase.Cmd {
105105
// Hidden
106106
r.gitssh(),
107107
r.scaletest(),
108-
r.trafficGen(),
109108
r.vscodeSSH(),
110109
r.workspaceAgent(),
111110
}

‎cli/scaletest.go

Lines changed: 260 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -10,6 +10,7 @@ import (
1010
"strconv"
1111
"strings"
1212
"sync"
13+
"sync/atomic"
1314
"syscall"
1415
"time"
1516

@@ -42,6 +43,7 @@ func (r *RootCmd) scaletest() *clibase.Cmd {
4243
Children: []*clibase.Cmd{
4344
r.scaletestCleanup(),
4445
r.scaletestCreateWorkspaces(),
46+
r.scaletestTrafficGen(),
4547
},
4648
}
4749

@@ -947,6 +949,156 @@ func (r *RootCmd) scaletestCreateWorkspaces() *clibase.Cmd {
947949
returncmd
948950
}
949951

952+
typetrafficGenOutputstruct {
953+
DurationSecondsfloat64`json:"duration_s"`
954+
SentBytesint64`json:"sent_bytes"`
955+
RcvdBytesint64`json:"rcvd_bytes"`
956+
}
957+
958+
func (otrafficGenOutput)String()string {
959+
returnfmt.Sprintf("Duration: %.2fs\n",o.DurationSeconds)+
960+
fmt.Sprintf("Sent: %dB\n",o.SentBytes)+
961+
fmt.Sprintf("Rcvd: %dB",o.RcvdBytes)
962+
}
963+
964+
func (r*RootCmd)scaletestTrafficGen()*clibase.Cmd {
965+
var (
966+
duration time.Duration
967+
formatter=cliui.NewOutputFormatter(
968+
cliui.TextFormat(),
969+
cliui.JSONFormat(),
970+
)
971+
bpsint64
972+
client=new(codersdk.Client)
973+
)
974+
975+
cmd:=&clibase.Cmd{
976+
Use:"trafficgen",
977+
Hidden:true,
978+
Short:"Generate traffic to a Coder workspace",
979+
Middleware:clibase.Chain(
980+
clibase.RequireRangeArgs(1,2),
981+
r.InitClient(client),
982+
),
983+
Handler:func(inv*clibase.Invocation)error {
984+
var (
985+
agentNamestring
986+
tickInterval=100*time.Millisecond
987+
)
988+
ws,err:=namedWorkspace(inv.Context(),client,inv.Args[0])
989+
iferr!=nil {
990+
returnerr
991+
}
992+
993+
varagentID uuid.UUID
994+
for_,res:=rangews.LatestBuild.Resources {
995+
iflen(res.Agents)==0 {
996+
continue
997+
}
998+
ifagentName!=""&&agentName!=res.Agents[0].Name {
999+
continue
1000+
}
1001+
agentID=res.Agents[0].ID
1002+
}
1003+
1004+
ifagentID==uuid.Nil {
1005+
returnxerrors.Errorf("no agent found for workspace %s",ws.Name)
1006+
}
1007+
1008+
// Setup our workspace agent connection.
1009+
reconnect:=uuid.New()
1010+
conn,err:=client.WorkspaceAgentReconnectingPTY(inv.Context(), codersdk.WorkspaceAgentReconnectingPTYOpts{
1011+
AgentID:agentID,
1012+
Reconnect:reconnect,
1013+
Height:65535,
1014+
Width:65535,
1015+
Command:"/bin/sh",
1016+
})
1017+
iferr!=nil {
1018+
returnxerrors.Errorf("connect to workspace: %w",err)
1019+
}
1020+
1021+
deferfunc() {
1022+
_=conn.Close()
1023+
}()
1024+
1025+
// Wrap the conn in a countReadWriter so we can monitor bytes sent/rcvd.
1026+
crw:=countReadWriter{ReadWriter:conn}
1027+
1028+
// Set a deadline for stopping the text.
1029+
start:=time.Now()
1030+
deadlineCtx,cancel:=context.WithDeadline(inv.Context(),start.Add(duration))
1031+
defercancel()
1032+
1033+
// Create a ticker for sending data to the PTY.
1034+
tick:=time.NewTicker(tickInterval)
1035+
defertick.Stop()
1036+
1037+
// Now we begin writing random data to the pty.
1038+
writeSize:=int(bps/10)
1039+
rch:=make(chanerror)
1040+
wch:=make(chanerror)
1041+
1042+
// Read forever in the background.
1043+
gofunc() {
1044+
rch<-readContext(deadlineCtx,&crw,writeSize*2)
1045+
conn.Close()
1046+
close(rch)
1047+
}()
1048+
1049+
// Write random data to the PTY every tick.
1050+
gofunc() {
1051+
wch<-writeRandomData(deadlineCtx,&crw,writeSize,tick.C)
1052+
close(wch)
1053+
}()
1054+
1055+
// Wait for both our reads and writes to be finished.
1056+
ifwErr:=<-wch;wErr!=nil {
1057+
returnxerrors.Errorf("write to pty: %w",wErr)
1058+
}
1059+
ifrErr:=<-rch;rErr!=nil {
1060+
returnxerrors.Errorf("read from pty: %w",rErr)
1061+
}
1062+
1063+
duration:=time.Since(start)
1064+
1065+
results:=trafficGenOutput{
1066+
DurationSeconds:duration.Seconds(),
1067+
SentBytes:crw.BytesWritten(),
1068+
RcvdBytes:crw.BytesRead(),
1069+
}
1070+
1071+
out,err:=formatter.Format(inv.Context(),results)
1072+
iferr!=nil {
1073+
returnerr
1074+
}
1075+
1076+
_,err=fmt.Fprintln(inv.Stdout,out)
1077+
returnerr
1078+
},
1079+
}
1080+
1081+
cmd.Options= []clibase.Option{
1082+
{
1083+
Flag:"duration",
1084+
Env:"CODER_SCALETEST_TRAFFICGEN_DURATION",
1085+
Default:"10s",
1086+
Description:"How long to generate traffic for.",
1087+
Value:clibase.DurationOf(&duration),
1088+
},
1089+
{
1090+
Flag:"bps",
1091+
Env:"CODER_SCALETEST_TRAFFICGEN_BPS",
1092+
Default:"1024",
1093+
Description:"How much traffic to generate in bytes per second.",
1094+
Value:clibase.Int64Of(&bps),
1095+
},
1096+
}
1097+
1098+
formatter.AttachOptions(&cmd.Options)
1099+
returncmd
1100+
}
1101+
9501102
typerunnableTraceWrapperstruct {
9511103
tracer trace.Tracer
9521104
spanNamestring
@@ -1023,3 +1175,111 @@ func isScaleTestWorkspace(workspace codersdk.Workspace) bool {
10231175
returnstrings.HasPrefix(workspace.OwnerName,"scaletest-")||
10241176
strings.HasPrefix(workspace.Name,"scaletest-")
10251177
}
1178+
1179+
funcreadContext(ctx context.Context,src io.Reader,bufSizeint)error {
1180+
buf:=make([]byte,bufSize)
1181+
for {
1182+
select {
1183+
case<-ctx.Done():
1184+
returnnil
1185+
default:
1186+
ifctx.Err()!=nil {
1187+
returnnil
1188+
}
1189+
_,err:=src.Read(buf)
1190+
iferr!=nil {
1191+
ifxerrors.Is(err,io.EOF) {
1192+
returnnil
1193+
}
1194+
returnerr
1195+
}
1196+
}
1197+
}
1198+
}
1199+
1200+
funcwriteRandomData(ctx context.Context,dst io.Writer,sizeint,tick<-chan time.Time)error {
1201+
for {
1202+
select {
1203+
case<-ctx.Done():
1204+
returnnil
1205+
case<-tick:
1206+
payload:="#"+mustRandStr(size-1)
1207+
data,err:=json.Marshal(codersdk.ReconnectingPTYRequest{
1208+
Data:payload,
1209+
})
1210+
iferr!=nil {
1211+
returnerr
1212+
}
1213+
if_,err:=copyContext(ctx,dst,data);err!=nil {
1214+
returnerr
1215+
}
1216+
}
1217+
}
1218+
}
1219+
1220+
// copyContext copies from src to dst until ctx is canceled.
1221+
funccopyContext(ctx context.Context,dst io.Writer,src []byte) (int,error) {
1222+
varcountint
1223+
for {
1224+
select {
1225+
case<-ctx.Done():
1226+
returncount,nil
1227+
default:
1228+
ifctx.Err()!=nil {
1229+
returncount,nil
1230+
}
1231+
n,err:=dst.Write(src)
1232+
iferr!=nil {
1233+
ifxerrors.Is(err,io.EOF) {
1234+
// On an EOF, assume that all of src was consumed.
1235+
returnlen(src),nil
1236+
}
1237+
returncount,err
1238+
}
1239+
count+=n
1240+
ifn==len(src) {
1241+
returncount,nil
1242+
}
1243+
// Not all of src was consumed. Update src and retry.
1244+
src=src[n:]
1245+
}
1246+
}
1247+
}
1248+
1249+
typecountReadWriterstruct {
1250+
io.ReadWriter
1251+
bytesRead atomic.Int64
1252+
bytesWritten atomic.Int64
1253+
}
1254+
1255+
func (w*countReadWriter)Read(p []byte) (int,error) {
1256+
n,err:=w.ReadWriter.Read(p)
1257+
iferr==nil {
1258+
w.bytesRead.Add(int64(n))
1259+
}
1260+
returnn,err
1261+
}
1262+
1263+
func (w*countReadWriter)Write(p []byte) (int,error) {
1264+
n,err:=w.ReadWriter.Write(p)
1265+
iferr==nil {
1266+
w.bytesWritten.Add(int64(n))
1267+
}
1268+
returnn,err
1269+
}
1270+
1271+
func (w*countReadWriter)BytesRead()int64 {
1272+
returnw.bytesRead.Load()
1273+
}
1274+
1275+
func (w*countReadWriter)BytesWritten()int64 {
1276+
returnw.bytesWritten.Load()
1277+
}
1278+
1279+
funcmustRandStr(lenint)string {
1280+
randStr,err:=cryptorand.String(len)
1281+
iferr!=nil {
1282+
panic(err)
1283+
}
1284+
returnrandStr
1285+
}

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