Remove SplitBrain implementation

api/v1beta1/gslb_types.go

@@ -36,7 +36,7 @@ type Strategy struct {
 	PrimaryGeoTag string `json:"primaryGeoTag,omitempty"`
 	// Defines DNS record TTL in seconds
 	DNSTtlSeconds int `json:"dnsTtlSeconds,omitempty"`
-	// Split brain TXT record expiration in seconds
+	// Split brain TXT record expiration in seconds. The field is deprecated and not used.
 	SplitBrainThresholdSeconds int `json:"splitBrainThresholdSeconds,omitempty"`
 }
 

chart/k8gb/README.md

@@ -116,7 +116,6 @@ For Kubernetes `< 1.19` use this chart and k8gb in version `0.8.8` or lower.
 | k8gb.securityContext.runAsNonRoot | bool | `true` | For more options consult https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.28/#securitycontext-v1-core |
 | k8gb.securityContext.runAsUser | int | `1000` |  |
 | k8gb.serviceMonitor | object | `{"enabled":false}` | enable ServiceMonitor |
-| k8gb.splitBrainCheck | bool | `false` | Enable SplitBrain check (Infoblox only) |
 | k8gb.validatingAdmissionPolicy | object | `{"enabled":false}` | enable validating admission policies |
 | ns1.enabled | bool | `false` | Enable NS1 provider |
 | ns1.ignoreSSL | bool | `false` | optional custom NS1 API endpoint for on-prem setups endpoint: https://api.nsone.net/v1/ |

chart/k8gb/crd/k8gb.absa.oss_gslbs.yaml

@@ -380,7 +380,8 @@ spec:
                     description: Primary Geo Tag. Valid for failover strategy only
                     type: string
                   splitBrainThresholdSeconds:
-                    description: Split brain TXT record expiration in seconds
+                    description: Split brain TXT record expiration in seconds. The
+                      field is deprecated and not used.
                     type: integer
                   type:
                     description: Load balancing strategy type:(roundRobin|failover)

chart/k8gb/templates/deployment.yaml

@@ -132,8 +132,6 @@ spec:
               value: {{ quote .Values.k8gb.log.level }}
             - name: NO_COLOR
               value: "true"
-            - name: SPLIT_BRAIN_CHECK
-              value: {{ quote .Values.k8gb.splitBrainCheck }}
             - name: METRICS_ADDRESS
               value: {{ .Values.k8gb.metricsAddress }}
       {{- if .Values.tracing.enabled }}

chart/k8gb/values.yaml

@@ -41,8 +41,6 @@ k8gb:
     format: simple # log format (simple,json)
     # -- log level (panic,fatal,error,warn,info,debug,trace)
     level: info # log level (panic,fatal,error,warn,info,debug,trace)
-  # -- Enable SplitBrain check (Infoblox only)
-  splitBrainCheck: false
   # -- Metrics server address
   metricsAddress: "0.0.0.0:8080"
   securityContext:

controllers/depresolver/depresolver.go

@@ -150,8 +150,6 @@ type Config struct {
 	MetricsAddress string `env:"METRICS_ADDRESS, default=0.0.0.0:8080"`
 	// extDNSEnabled hidden. EdgeDNSType defines all enabled Enabled types
 	extDNSEnabled bool `env:"EXTDNS_ENABLED, default=false"`
-	// SplitBrainCheck flag decides whether split brain TXT records will be stored in edge DNS
-	SplitBrainCheck bool `env:"SPLIT_BRAIN_CHECK, default=false"`
 	// TracingEnabled flag decides whether to use a real otlp tracer or a noop one
 	TracingEnabled bool `env:"TRACING_ENABLED, default=false"`
 	// TracingSamplingRatio how many traces should be kept and sent (1.0 - all, 0.0 - none)

controllers/depresolver/depresolver_config.go

@@ -54,7 +54,6 @@ const (
 	LogLevelKey                    = "LOG_LEVEL"
 	LogFormatKey                   = "LOG_FORMAT"
 	LogNoColorKey                  = "NO_COLOR"
-	SplitBrainCheckKey             = "SPLIT_BRAIN_CHECK"
 	TracingEnabled                 = "TRACING_ENABLED"
 	OtelExporterOtlpEndpoint       = "OTEL_EXPORTER_OTLP_ENDPOINT"
 	TracingSamplingRatio           = "TRACING_SAMPLING_RATIO"
@@ -383,18 +382,6 @@ func (c *Config) GetClusterNSName() string {
 	return getNsName(c.ClusterGeoTag, c.DNSZone, c.EdgeDNSZone, c.EdgeDNSServers[0].Host)
 }
 
-func (c *Config) GetExternalClusterHeartbeatFQDNs(gslbName string) (m map[string]string) {
-	m = make(map[string]string, len(c.ExtClustersGeoTags))
-	for _, tag := range c.ExtClustersGeoTags {
-		m[tag] = getHeartbeatFQDN(gslbName, tag, c.EdgeDNSZone)
-	}
-	return
-}
-
-func (c *Config) GetClusterHeartbeatFQDN(gslbName string) string {
-	return getHeartbeatFQDN(gslbName, c.ClusterGeoTag, c.EdgeDNSZone)
-}
-
 // getNsName returns NS for geo tag.
 // The values is combination of DNSZone, EdgeDNSZone and (Ext)ClusterGeoTag, see:
 // DNS_ZONE k8gb-test.gslb.cloud.example.com
@@ -412,14 +399,3 @@ func getNsName(tag, dnsZone, edgeDNSZone, edgeDNSServer string) string {
 	domainX := strings.ReplaceAll(d, ".", "-")
 	return fmt.Sprintf("%s-%s-%s.%s", prefix, tag, domainX, edgeDNSZone)
 }
-
-// getHeartbeatFQDN returns heartbeat for geo tag.
-// The values is combination of EdgeDNSZone and (Ext)ClusterGeoTag, and GSLB name see:
-// EDGE_DNS_ZONE: cloud.example.com
-// CLUSTER_GEOTAG: us
-// gslb.Name: test-gslb-1
-// will generate "test-gslb-1-heartbeat-us.cloud.example.com"
-// The function is private and expects only valid inputs.
-func getHeartbeatFQDN(name, geoTag, edgeDNSZone string) string {
-	return fmt.Sprintf("%s-heartbeat-%s.%s", name, geoTag, edgeDNSZone)
-}

controllers/depresolver/depresolver_spec.go

@@ -29,8 +29,7 @@ import (
 )
 
 var predefinedStrategy = k8gbv1beta1.Strategy{
-	DNSTtlSeconds:              30,
-	SplitBrainThresholdSeconds: 300,
+	DNSTtlSeconds: 30,
 }
 
 // ResolveGslbSpec fills Gslb by spec values. It executes always, when gslb is initialised.
@@ -44,9 +43,6 @@ func (dr *DependencyResolver) ResolveGslbSpec(ctx context.Context, gslb *k8gbv1b
 		if gslb.Spec.Strategy.DNSTtlSeconds == 0 {
 			gslb.Spec.Strategy.DNSTtlSeconds = predefinedStrategy.DNSTtlSeconds
 		}
-		if gslb.Spec.Strategy.SplitBrainThresholdSeconds == 0 {
-			gslb.Spec.Strategy.SplitBrainThresholdSeconds = predefinedStrategy.SplitBrainThresholdSeconds
-		}
 		dr.errorSpec = dr.validateSpec(gslb.Spec.Strategy)
 		if dr.errorSpec == nil {
 			dr.errorSpec = client.Update(ctx, gslb)
@@ -61,10 +57,6 @@ func (dr *DependencyResolver) validateSpec(strategy k8gbv1beta1.Strategy) (err e
 	if err != nil {
 		return
 	}
-	err = field("SplitBrainThresholdSeconds", strategy.SplitBrainThresholdSeconds).isHigherOrEqualToZero().err
-	if err != nil {
-		return
-	}
 	err = field("Type", strategy.Type).isOneOf(RoundRobinStrategy, GeoStrategy, FailoverStrategy).err
 	if err != nil {
 		return

controllers/depresolver/depresolver_test.go

@@ -70,7 +70,6 @@ var predefinedConfig = Config{
 	EdgeDNSZone:               "example.com",
 	DNSZone:                   defaultEdgeDNSZone,
 	K8gbNamespace:             "k8gb",
-	SplitBrainCheck:           true,
 	MetricsAddress:            "0.0.0.0:8080",
 	Infoblox: Infoblox{
 		"Infoblox.host.com",
@@ -97,7 +96,6 @@ func TestResolveSpecWithFilledFields(t *testing.T) {
 	// assert
 	assert.NoError(t, err)
 	assert.Equal(t, 35, gslb.Spec.Strategy.DNSTtlSeconds)
-	assert.Equal(t, 305, gslb.Spec.Strategy.SplitBrainThresholdSeconds)
 	assert.False(t, len(gslb.Spec.Strategy.Weight) == 0)
 	assert.Equal(t, 15, gslb.Spec.Strategy.Weight["za"])
 	assert.Equal(t, 25, gslb.Spec.Strategy.Weight["eu"])
@@ -114,22 +112,9 @@ func TestResolveSpecWithoutFields(t *testing.T) {
 	// assert
 	assert.NoError(t, err)
 	assert.Equal(t, predefinedStrategy.DNSTtlSeconds, gslb.Spec.Strategy.DNSTtlSeconds)
-	assert.Equal(t, predefinedStrategy.SplitBrainThresholdSeconds, gslb.Spec.Strategy.SplitBrainThresholdSeconds)
 	assert.True(t, len(gslb.Spec.Strategy.Weight) == 0)
 }
 
-func TestResolveSpecWithZeroSplitBrain(t *testing.T) {
-	// arrange
-	cl, gslb := getTestContext("./testdata/filled_omitempty_with_zero_splitbrain.yaml")
-	resolver := NewDependencyResolver()
-	// act
-	err := resolver.ResolveGslbSpec(context.TODO(), gslb, cl)
-	// assert
-	assert.NoError(t, err)
-	assert.Equal(t, 35, gslb.Spec.Strategy.DNSTtlSeconds)
-	assert.Equal(t, predefinedStrategy.SplitBrainThresholdSeconds, gslb.Spec.Strategy.SplitBrainThresholdSeconds)
-}
-
 func TestResolveSpecWithEmptyFields(t *testing.T) {
 	// arrange
 	cl, gslb := getTestContext("./testdata/invalid_omitempty_empty.yaml")
@@ -139,17 +124,6 @@ func TestResolveSpecWithEmptyFields(t *testing.T) {
 	// assert
 	assert.NoError(t, err)
 	assert.Equal(t, predefinedStrategy.DNSTtlSeconds, gslb.Spec.Strategy.DNSTtlSeconds)
-	assert.Equal(t, predefinedStrategy.SplitBrainThresholdSeconds, gslb.Spec.Strategy.SplitBrainThresholdSeconds)
-}
-
-func TestResolveSpecWithNegativeFields(t *testing.T) {
-	// arrange
-	cl, gslb := getTestContext("./testdata/invalid_omitempty_negative.yaml")
-	resolver := NewDependencyResolver()
-	// act
-	err := resolver.ResolveGslbSpec(context.TODO(), gslb, cl)
-	// assert
-	assert.Error(t, err)
 }
 
 func TestResolveSpecWithType(t *testing.T) {
@@ -227,13 +201,11 @@ func TestSpecRunWhenChanged(t *testing.T) {
 	resolver := NewDependencyResolver()
 	// act
 	err1 := resolver.ResolveGslbSpec(ctx, gslb, cl)
-	gslb.Spec.Strategy.SplitBrainThresholdSeconds = 0
 	err2 := resolver.ResolveGslbSpec(ctx, gslb, cl)
 	// assert
 	assert.NoError(t, err1)
 	// err2 would not be empty
 	assert.NoError(t, err2)
-	assert.Equal(t, predefinedStrategy.SplitBrainThresholdSeconds, gslb.Spec.Strategy.SplitBrainThresholdSeconds)
 	assert.Equal(t, 35, gslb.Spec.Strategy.DNSTtlSeconds)
 }
 
@@ -1184,63 +1156,6 @@ func TestResolveLoggerOutputWithInvalidValue(t *testing.T) {
 	assert.Equal(t, NoFormat, config.Log.Format)
 }
 
-func TestResolveConfigSplitBrainCheckEnabled(t *testing.T) {
-	// arrange
-	defer cleanup()
-	expected := predefinedConfig
-	expected.SplitBrainCheck = true
-	// act,assert
-	arrangeVariablesAndAssert(t, expected, assert.NoError)
-}
-
-func TestHeartBeatWithMultipleExtClusterGeoTag(t *testing.T) {
-	const geoTag = "test-gslb-1"
-	// arrange
-	defer cleanup()
-	customConfig := predefinedConfig
-	customConfig.DNSZone = defaultDNSZone
-	customConfig.EdgeDNSZone = defaultEdgeDNSZone
-	customConfig.ClusterGeoTag = defaultClusterGeoTagUs1
-	customConfig.ExtClustersGeoTags = []string{defaultClusterGeoTagUs2, defaultClusterGeoTagEu}
-	configureEnvVar(customConfig)
-	resolver := NewDependencyResolver()
-
-	// act
-	config, err := resolver.ResolveOperatorConfig()
-
-	// assert
-	assert.NoError(t, err)
-	assert.Len(t, config.GetExternalClusterHeartbeatFQDNs(geoTag), 2)
-	assert.Equal(t, "test-gslb-1-heartbeat-us-west-1.cloud.example.com", config.GetClusterHeartbeatFQDN(geoTag))
-
-	for k, v := range map[string]string{defaultClusterGeoTagUs2: "test-gslb-1-heartbeat-us-east-1.cloud.example.com",
-		defaultClusterGeoTagEu: "test-gslb-1-heartbeat-eu-central-1.cloud.example.com"} {
-		assert.Equal(t, config.GetExternalClusterHeartbeatFQDNs(geoTag)[k], v)
-	}
-}
-
-func TestHeartBeatWithOneExtClusterGeoTag(t *testing.T) {
-	const geoTag = "test-gslb-1"
-	// arrange
-	defer cleanup()
-	customConfig := predefinedConfig
-	customConfig.DNSZone = defaultDNSZone
-	customConfig.EdgeDNSZone = defaultEdgeDNSZone
-	customConfig.ClusterGeoTag = defaultClusterGeoTagUs1
-	customConfig.ExtClustersGeoTags = []string{defaultClusterGeoTagUs2}
-	configureEnvVar(customConfig)
-	resolver := NewDependencyResolver()
-
-	// act
-	config, err := resolver.ResolveOperatorConfig()
-
-	// assert
-	assert.NoError(t, err)
-	assert.Len(t, config.GetExternalClusterHeartbeatFQDNs(geoTag), 1)
-	assert.Equal(t, "test-gslb-1-heartbeat-us-west-1.cloud.example.com", config.GetClusterHeartbeatFQDN(geoTag))
-	assert.Equal(t, config.GetExternalClusterHeartbeatFQDNs(geoTag)[defaultClusterGeoTagUs2], "test-gslb-1-heartbeat-us-east-1.cloud.example.com")
-}
-
 func TestNsServerNamesWithMultipleExtClusterGeoTag(t *testing.T) {
 	// arrange
 	defer cleanup()
@@ -1526,7 +1441,7 @@ func cleanup() {
 	for _, s := range []string{ReconcileRequeueSecondsKey, NSRecordTTLKey, ClusterGeoTagKey, ExtClustersGeoTagsKey, EdgeDNSZoneKey, DNSZoneKey,
 		EdgeDNSServersKey, ExtDNSEnabledKey, InfobloxGridHostKey, InfobloxVersionKey, InfobloxPortKey, InfobloxUsernameKey,
 		InfobloxPasswordKey, K8gbNamespaceKey, CoreDNSExposedKey, InfobloxHTTPRequestTimeoutKey,
-		InfobloxHTTPPoolConnectionsKey, LogLevelKey, LogFormatKey, LogNoColorKey, MetricsAddressKey, SplitBrainCheckKey, TracingEnabled,
+		InfobloxHTTPPoolConnectionsKey, LogLevelKey, LogFormatKey, LogNoColorKey, MetricsAddressKey, TracingEnabled,
 		TracingSamplingRatio, OtelExporterOtlpEndpoint} {
 		if os.Unsetenv(s) != nil {
 			panic(fmt.Errorf("cleanup %s", s))
@@ -1558,7 +1473,6 @@ func configureEnvVar(config Config) {
 	_ = os.Setenv(LogFormatKey, config.Log.Format.String())
 	_ = os.Setenv(LogNoColorKey, strconv.FormatBool(config.Log.NoColor))
 	_ = os.Setenv(MetricsAddressKey, config.MetricsAddress)
-	_ = os.Setenv(SplitBrainCheckKey, strconv.FormatBool(config.SplitBrainCheck))
 	_ = os.Setenv(TracingEnabled, strconv.FormatBool(config.TracingEnabled))
 	_ = os.Setenv(TracingSamplingRatio, strconv.FormatFloat(config.TracingSamplingRatio, 'f', 2, 64))
 	_ = os.Setenv(OtelExporterOtlpEndpoint, config.OtelExporterOtlpEndpoint)

controllers/depresolver/testdata/filled_omitempty.yaml

@@ -35,7 +35,6 @@ spec:
                   name: http
   strategy:
     type: roundRobin # Use a round robin load balancing strategy, when deciding which downstream clusters to route clients too
-    splitBrainThresholdSeconds: 305
     dnsTtlSeconds: 35
     weight:
       us: 60

controllers/depresolver/testdata/filled_omitempty_with_zero_splitbrain.yaml

@@ -35,6 +35,5 @@ spec:
                     name: http
   strategy:
     type: roundRobin # Use a round robin load balancing strategy, when deciding which downstream clusters to route clients too
-    splitBrainThresholdSeconds: 0
     dnsTtlSeconds: 35
 

controllers/depresolver/testdata/invalid_omitempty_empty.yaml

@@ -35,5 +35,4 @@ spec:
                     name: http
   strategy:
     type: roundRobin # Use a round robin load balancing strategy, when deciding which downstream clusters to route clients too
-    splitBrainThresholdSeconds:
     weight:

controllers/gslb_controller_reconciliation.go

@@ -56,14 +56,13 @@ type GslbReconciler struct {
 }
 
 const (
-	gslbFinalizer                        = "k8gb.absa.oss/finalizer"
-	primaryGeoTagAnnotation              = "k8gb.io/primary-geotag"
-	strategyAnnotation                   = "k8gb.io/strategy"
-	dnsTTLSecondsAnnotation              = "k8gb.io/dns-ttl-seconds"
-	splitBrainThresholdSecondsAnnotation = "k8gb.io/splitbrain-threshold-seconds"
+	gslbFinalizer           = "k8gb.absa.oss/finalizer"
+	primaryGeoTagAnnotation = "k8gb.io/primary-geotag"
+	strategyAnnotation      = "k8gb.io/strategy"
+	dnsTTLSecondsAnnotation = "k8gb.io/dns-ttl-seconds"
 )
 
-var k8gbAnnotations = []string{strategyAnnotation, primaryGeoTagAnnotation, dnsTTLSecondsAnnotation, splitBrainThresholdSecondsAnnotation}
+var k8gbAnnotations = []string{strategyAnnotation, primaryGeoTagAnnotation, dnsTTLSecondsAnnotation}
 
 var log = logging.Logger()