health: prefix Warnables received from the control plane

Updates tailscale/corp#27759

Signed-off-by: James Sanderson <jsanderson@tailscale.com>

control/controlclient/map.go

@@ -853,7 +853,7 @@ func (ms *mapSession) netmap() *netmap.NetworkMap {
 	} else if len(ms.lastHealth) > 0 {
 		// Convert all ms.lastHealth to the new [netmap.NetworkMap.DisplayMessages]
 		for _, h := range ms.lastHealth {
-			id := "control-health-" + strhash(h) // Unique ID in case there is more than one health message
+			id := "health-" + strhash(h) // Unique ID in case there is more than one health message
 			mak.Set(&msgs, tailcfg.DisplayMessageID(id), tailcfg.DisplayMessage{
 				Title:    "Coordination server reports an issue",
 				Severity: tailcfg.SeverityMedium,

control/controlclient/map_test.go

@@ -1340,14 +1340,14 @@ func TestNetmapHealthIntegration(t *testing.T) {
 	ht.SetControlHealth(nm.DisplayMessages)
 
 	want := map[health.WarnableCode]health.UnhealthyState{
-		"control-health-c0719e9a8d5d838d861dc6f675c899d2b309a3a65bb9fe6b11e5afcbf9a2c0b1": {
-			WarnableCode: "control-health-c0719e9a8d5d838d861dc6f675c899d2b309a3a65bb9fe6b11e5afcbf9a2c0b1",
+		"control-health.health-c0719e9a8d5d838d861dc6f675c899d2b309a3a65bb9fe6b11e5afcbf9a2c0b1": {
+			WarnableCode: "control-health.health-c0719e9a8d5d838d861dc6f675c899d2b309a3a65bb9fe6b11e5afcbf9a2c0b1",
 			Title:        "Coordination server reports an issue",
 			Severity:     health.SeverityMedium,
 			Text:         "The coordination server is reporting a health issue: Test message",
 		},
-		"control-health-1dc7017a73a3c55c0d6a8423e3813c7ab6562d9d3064c2ec6ac7822f61b1db9c": {
-			WarnableCode: "control-health-1dc7017a73a3c55c0d6a8423e3813c7ab6562d9d3064c2ec6ac7822f61b1db9c",
+		"control-health.health-1dc7017a73a3c55c0d6a8423e3813c7ab6562d9d3064c2ec6ac7822f61b1db9c": {
+			WarnableCode: "control-health.health-1dc7017a73a3c55c0d6a8423e3813c7ab6562d9d3064c2ec6ac7822f61b1db9c",
 			Title:        "Coordination server reports an issue",
 			Severity:     health.SeverityMedium,
 			Text:         "The coordination server is reporting a health issue: Another message",
@@ -1401,8 +1401,8 @@ func TestNetmapDisplayMessageIntegration(t *testing.T) {
 	}
 
 	want := map[health.WarnableCode]health.UnhealthyState{
-		"test-message": {
-			WarnableCode:        "test-message",
+		"control-health.test-message": {
+			WarnableCode:        "control-health.test-message",
 			Title:               "Testing",
 			Text:                "This is a test message",
 			Severity:            health.SeverityHigh,

health/health_test.go

@@ -468,14 +468,14 @@ func TestControlHealth(t *testing.T) {
 	baseStrs := ht.Strings()
 
 	msgs := map[tailcfg.DisplayMessageID]tailcfg.DisplayMessage{
-		"control-health-test": {
+		"test": {
 			Title: "Control health message",
 			Text:  "Extra help.",
 		},
-		"control-health-title": {
+		"title": {
 			Title: "Control health title only",
 		},
-		"control-health-with-action": {
+		"with-action": {
 			Title: "Control health message",
 			Text:  "Extra help.",
 			PrimaryAction: &tailcfg.DisplayMessageAction{
@@ -488,19 +488,19 @@ func TestControlHealth(t *testing.T) {
 
 	t.Run("Warnings", func(t *testing.T) {
 		wantWarns := map[WarnableCode]UnhealthyState{
-			"control-health-test": {
-				WarnableCode: "control-health-test",
+			"control-health.test": {
+				WarnableCode: "control-health.test",
 				Severity:     SeverityMedium,
 				Title:        "Control health message",
 				Text:         "Extra help.",
 			},
-			"control-health-title": {
-				WarnableCode: "control-health-title",
+			"control-health.title": {
+				WarnableCode: "control-health.title",
 				Severity:     SeverityMedium,
 				Title:        "Control health title only",
 			},
-			"control-health-with-action": {
-				WarnableCode: "control-health-with-action",
+			"control-health.with-action": {
+				WarnableCode: "control-health.with-action",
 				Severity:     SeverityMedium,
 				Title:        "Control health message",
 				Text:         "Extra help.",

health/state.go

@@ -112,7 +112,7 @@ func (t *Tracker) CurrentState() *State {
 
 	for id, msg := range t.lastNotifiedControlMessages {
 		state := UnhealthyState{
-			WarnableCode:        WarnableCode(id),
+			WarnableCode:        WarnableCode("control-health." + id),
 			Severity:            severityFromTailcfg(msg.Severity),
 			Title:               msg.Title,
 			Text:                msg.Text,

ipn/ipnlocal/local_test.go

@@ -8,6 +8,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"maps"
 	"math"
 	"net"
 	"net/http"
@@ -5422,10 +5423,11 @@ func TestDisplayMessages(t *testing.T) {
 	})
 
 	state := ht.CurrentState()
-	_, ok := state.Warnings["test-message"]
+	wantID := health.WarnableCode("control-health.test-message")
+	_, ok := state.Warnings[wantID]
 
 	if !ok {
-		t.Error("no warning found with id 'test-message'")
+		t.Errorf("no warning found with id %q", wantID)
 	}
 }
 
@@ -5455,14 +5457,15 @@ func TestDisplayMessagesURLFilter(t *testing.T) {
 	})
 
 	state := ht.CurrentState()
-	got, ok := state.Warnings["test-message"]
+	wantID := health.WarnableCode("control-health.test-message")
+	got, ok := state.Warnings[wantID]
 
 	if !ok {
-		t.Fatal("no warning found with id 'test-message'")
+		t.Fatalf("no warning found with id %q", wantID)
 	}
 
 	want := health.UnhealthyState{
-		WarnableCode: "test-message",
+		WarnableCode: wantID,
 		Title:        "Testing",
 		Severity:     health.SeverityHigh,
 	}
@@ -5494,12 +5497,14 @@ func TestDisplayMessageIPNBus(t *testing.T) {
 		},
 	}
 
+	wantID := health.WarnableCode("control-health.test-message")
+
 	for _, tt := range []test{
 		{
 			name: "older-client-no-actions",
 			mask: 0,
 			wantWarning: health.UnhealthyState{
-				WarnableCode:  "test-message",
+				WarnableCode:  wantID,
 				Severity:      health.SeverityMedium,
 				Title:         "Message title",
 				Text:          "Message text. Learn more: https://example.com", // PrimaryAction appended to text
@@ -5510,7 +5515,7 @@ func TestDisplayMessageIPNBus(t *testing.T) {
 			name: "new-client-with-actions",
 			mask: ipn.NotifyHealthActions,
 			wantWarning: health.UnhealthyState{
-				WarnableCode: "test-message",
+				WarnableCode: wantID,
 				Severity:     health.SeverityMedium,
 				Title:        "Message title",
 				Text:         "Message text.",
@@ -5530,17 +5535,20 @@ func TestDisplayMessageIPNBus(t *testing.T) {
 
 			ipnWatcher := newNotificationWatcher(t, lb, nil)
 			ipnWatcher.watch(tt.mask, []wantedNotification{{
-				name: "test",
+				name: fmt.Sprintf("warning with ID %q", wantID),
 				cond: func(_ testing.TB, _ ipnauth.Actor, n *ipn.Notify) bool {
 					if n.Health == nil {
 						return false
 					}
-					got, ok := n.Health.Warnings["test-message"]
+					got, ok := n.Health.Warnings[wantID]
 					if ok {
 						if diff := cmp.Diff(tt.wantWarning, got); diff != "" {
 							t.Errorf("unexpected warning details (-want/+got):\n%s", diff)
 							return true // we failed the test so tell the watcher we've seen what we need to to stop it waiting
 						}
+					} else {
+						got := slices.Collect(maps.Keys(n.Health.Warnings))
+						t.Logf("saw warnings: %v", got)
 					}
 					return ok
 				},