update

agent/handlers.go

@@ -217,7 +217,7 @@ func (h *SyncNetworkProbesHandler) Handle(hctx *HandlerContext) error {
 	if err := cbor.Unmarshal(hctx.Request.Data, &req); err != nil {
 		return err
 	}
-	resp, err := hctx.Agent.probeManager.ApplySync(req)
+	resp, err := hctx.Agent.probeManager.HandleSyncRequest(req)
 	if err != nil {
 		return err
 	}

agent/probe.go

@@ -86,6 +86,19 @@ func newProbeTask(config probe.Config) *probeTask {
 	}
 }
 
+func newProbeTaskFromExisting(config probe.Config, existing *probeTask) *probeTask {
+	task := newProbeTask(config)
+	if existing == nil {
+		return task
+	}
+
+	existing.mu.Lock()
+	defer existing.mu.Unlock()
+	task.samples = append(task.samples, existing.samples...)
+	task.buckets = existing.buckets
+	return task
+}
+
 // newProbeAggregate initializes an aggregate with an unset minimum value.
 func newProbeAggregate() probeAggregate {
 	return probeAggregate{minMs: math.MaxFloat64}
@@ -193,14 +206,14 @@ func (pm *ProbeManager) SyncProbes(configs []probe.Config) {
 		if exists {
 			close(task.cancel)
 		}
-		task = newProbeTask(cfg)
+		task = newProbeTaskFromExisting(cfg, task)
 		pm.probes[key] = task
 		go pm.runProbe(task, true)
 	}
 }
 
-// ApplySync applies a full or incremental probe sync request.
-func (pm *ProbeManager) ApplySync(req probe.SyncRequest) (probe.SyncResponse, error) {
+// HandleSyncRequest applies a full or incremental probe sync request.
+func (pm *ProbeManager) HandleSyncRequest(req probe.SyncRequest) (probe.SyncResponse, error) {
 	switch req.Action {
 	case probe.SyncActionReplace:
 		pm.SyncProbes(req.Configs)
@@ -216,7 +229,7 @@ func (pm *ProbeManager) ApplySync(req probe.SyncRequest) (probe.SyncResponse, er
 		return probe.SyncResponse{Result: *result}, nil
 	case probe.SyncActionDelete:
 		if req.Config.ID == "" {
-			return probe.SyncResponse{}, errors.New("missing probe ID for delete action")
+			return probe.SyncResponse{}, errors.New("missing probe ID for delete")
 		}
 		pm.DeleteProbe(req.Config.ID)
 		return probe.SyncResponse{}, nil
@@ -244,7 +257,7 @@ func (pm *ProbeManager) UpsertProbe(config probe.Config, runNow bool) (*probe.Re
 	if exists {
 		close(task.cancel)
 	}
-	task = newProbeTask(config)
+	task = newProbeTaskFromExisting(config, task)
 	pm.probes[config.ID] = task
 	startTask = true
 	pm.mu.Unlock()
@@ -309,7 +322,7 @@ func (pm *ProbeManager) Stop() {
 }
 
 // runProbe executes a single probe task in a loop.
-func (pm *ProbeManager) runProbe(task *probeTask, runImmediately bool) {
+func (pm *ProbeManager) runProbe(task *probeTask, runNow bool) {
 	interval := time.Duration(task.config.Interval) * time.Second
 	if interval < time.Second {
 		interval = 10 * time.Second
@@ -317,7 +330,7 @@ func (pm *ProbeManager) runProbe(task *probeTask, runImmediately bool) {
 	ticker := time.NewTicker(interval)
 	defer ticker.Stop()
 
-	if runImmediately {
+	if runNow {
 		pm.executeProbe(task)
 	}
 

agent/probe_test.go

@@ -197,7 +197,7 @@ func TestProbeManagerApplySyncUpsertRunsImmediatelyAndReturnsResult(t *testing.T
 		httpClient: server.Client(),
 	}
 
-	resp, err := pm.ApplySync(probe.SyncRequest{
+	resp, err := pm.HandleSyncRequest(probe.SyncRequest{
 		Action: probe.SyncActionUpsert,
 		Config: probe.Config{ID: "probe-1", Target: server.URL, Protocol: "http", Interval: 10},
 		RunNow: true,
@@ -216,6 +216,48 @@ func TestProbeManagerApplySyncUpsertRunsImmediatelyAndReturnsResult(t *testing.T
 	require.Len(t, task.samples, 1)
 }
 
+func TestProbeManagerUpsertProbeKeepsHistoryWhenOnlyIntervalChanges(t *testing.T) {
+	originalCfg := probe.Config{ID: "probe-1", Target: "1.1.1.1", Protocol: "icmp", Interval: 10}
+	updatedCfg := probe.Config{ID: "probe-1", Target: "1.1.1.1", Protocol: "icmp", Interval: 30}
+	now := time.Now().UTC()
+
+	existingTask := &probeTask{config: originalCfg, cancel: make(chan struct{})}
+	existingTask.addSampleLocked(probeSample{responseMs: 12, timestamp: now.Add(-50 * time.Minute)})
+	existingTask.addSampleLocked(probeSample{responseMs: 24, timestamp: now.Add(-30 * time.Second)})
+
+	pm := &ProbeManager{
+		probes: map[string]*probeTask{originalCfg.ID: existingTask},
+	}
+
+	result, err := pm.UpsertProbe(updatedCfg, false)
+	defer pm.Stop()
+
+	require.NoError(t, err)
+	assert.Nil(t, result)
+
+	updatedTask := pm.probes[updatedCfg.ID]
+	require.NotNil(t, updatedTask)
+	assert.NotSame(t, existingTask, updatedTask)
+	assert.Equal(t, updatedCfg, updatedTask.config)
+
+	updatedTask.mu.Lock()
+	defer updatedTask.mu.Unlock()
+	require.Len(t, updatedTask.samples, 1)
+	assert.Equal(t, 24.0, updatedTask.samples[0].responseMs)
+
+	agg := updatedTask.aggregateLocked(time.Hour, now)
+	require.True(t, agg.hasData())
+	assert.Equal(t, 2, agg.totalCount)
+	assert.Equal(t, 2, agg.successCount)
+	assert.Equal(t, 18.0, agg.avgResponse())
+
+	select {
+	case <-existingTask.cancel:
+	default:
+		t.Fatal("expected original probe task to be cancelled")
+	}
+}
+
 func TestProbeManagerApplySyncDeleteRemovesTask(t *testing.T) {
 	config := probe.Config{ID: "probe-1", Target: "1.1.1.1", Protocol: "icmp", Interval: 10}
 	task := &probeTask{config: config, cancel: make(chan struct{})}
@@ -223,7 +265,7 @@ func TestProbeManagerApplySyncDeleteRemovesTask(t *testing.T) {
 		probes: map[string]*probeTask{config.ID: task},
 	}
 
-	_, err := pm.ApplySync(probe.SyncRequest{
+	_, err := pm.HandleSyncRequest(probe.SyncRequest{
 		Action: probe.SyncActionDelete,
 		Config: probe.Config{ID: config.ID},
 	})

internal/hub/probes.go

@@ -1,6 +1,7 @@
 package hub
 
 import (
+	"strconv"
 	"time"
 
 	"github.com/henrygd/beszel/internal/entities/probe"
@@ -11,7 +12,7 @@ import (
 
 // generateProbeID creates a stable hash ID for a probe based on its configuration and the system it belongs to.
 func generateProbeID(systemId string, config probe.Config) string {
-	return systems.MakeStableHashId(systemId, config.Target, config.Protocol)
+	return systems.MakeStableHashId(systemId, config.Target, config.Protocol, strconv.FormatUint(uint64(config.Port), 10))
 }
 
 // bindNetworkProbesEvents keeps probe records and agent probe state in sync.

internal/hub/probes_test.go

@@ -23,7 +23,7 @@ func TestGenerateProbeID(t *testing.T) {
 				Port:     80,
 				Interval: 60,
 			},
-			expected: "a20a5827",
+			expected: "de7b3647",
 		},
 		{
 			name:     "HTTP probe on example.com with different system ID",
@@ -34,7 +34,7 @@ func TestGenerateProbeID(t *testing.T) {
 				Port:     80,
 				Interval: 60,
 			},
-			expected: "ab602ae7",
+			expected: "be9e2707",
 		},
 		{
 			name:     "Same probe, different interval",
@@ -45,7 +45,7 @@ func TestGenerateProbeID(t *testing.T) {
 				Port:     80,
 				Interval: 120,
 			},
-			expected: "ab602ae7",
+			expected: "be9e2707",
 		},
 		{
 			name:     "ICMP probe on 1.1.1.1",
@@ -56,7 +56,7 @@ func TestGenerateProbeID(t *testing.T) {
 				Port:     0,
 				Interval: 10,
 			},
-			expected: "6d13a4a4",
+			expected: "49ec14fc",
 		}, {
 			name:     "ICMP probe on 1.1.1.1 with different system ID",
 			systemID: "sys4567",
@@ -66,7 +66,29 @@ func TestGenerateProbeID(t *testing.T) {
 				Port:     0,
 				Interval: 10,
 			},
-			expected: "ddd6c81",
+			expected: "84921aa3",
+		},
+		{
+			name:     "TCP probe on example.com with port 443",
+			systemID: "sys789",
+			config: probe.Config{
+				Protocol: "tcp",
+				Target:   "example.com",
+				Port:     443,
+				Interval: 30,
+			},
+			expected: "677b991",
+		},
+		{
+			name:     "TCP probe on example.com with port 8443",
+			systemID: "sys789",
+			config: probe.Config{
+				Protocol: "tcp",
+				Target:   "example.com",
+				Port:     8443,
+				Interval: 30,
+			},
+			expected: "84167969",
 		},
 	}