apis/v1beta1: remove ComponentUseLocalHostAsDefaultHost feature gate

.chloggen/remove_localhost_fg.yaml

@@ -0,0 +1,18 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. collector, target allocator, auto-instrumentation, opamp, github action)
+component: operator
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Remove ComponentUseLocalHostAsDefaultHost feature gate.
+
+# One or more tracking issues related to the change
+issues: [3306]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: |
+  This change may break setups where receiver endpoints are not explicitly configured to listen on e.g. 0.0.0.0.
+  Change \#3333 attempts to address this issue for a known set of components.

apis/v1beta1/collector_webhook.go

@@ -78,8 +78,6 @@ func (c CollectorWebhook) Default(_ context.Context, obj runtime.Object) error {
 		otelcol.Spec.TargetAllocator.Replicas = &one
 	}
 
-	ComponentUseLocalHostAsDefaultHost(otelcol)
-
 	if otelcol.Spec.Autoscaler != nil && otelcol.Spec.Autoscaler.MaxReplicas != nil {
 		if otelcol.Spec.Autoscaler.MinReplicas == nil {
 			otelcol.Spec.Autoscaler.MinReplicas = otelcol.Spec.Replicas
@@ -453,23 +451,3 @@ func SetupCollectorWebhook(mgr ctrl.Manager, cfg config.Config, reviewer *rbac.R
 		WithDefaulter(cvw).
 		Complete()
 }
-
-// ComponentUseLocalHostAsDefaultHost enables component.UseLocalHostAsDefaultHost
-// featuregate on the given collector instance.
-// NOTE: For more details, visit:
-// https://github.com/open-telemetry/opentelemetry-collector/issues/8510
-func ComponentUseLocalHostAsDefaultHost(otelcol *OpenTelemetryCollector) {
-	const (
-		baseFlag = "feature-gates"
-		fgFlag   = "component.UseLocalHostAsDefaultHost"
-	)
-	if otelcol.Spec.Args == nil {
-		otelcol.Spec.Args = make(map[string]string)
-	}
-	args, ok := otelcol.Spec.Args[baseFlag]
-	if !ok || len(args) == 0 {
-		otelcol.Spec.Args[baseFlag] = "-" + fgFlag
-	} else if !strings.Contains(otelcol.Spec.Args[baseFlag], fgFlag) {
-		otelcol.Spec.Args[baseFlag] += ",-" + fgFlag
-	}
-}

apis/v1beta1/collector_webhook_test.go

@@ -162,7 +162,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 				},
 				Spec: v1beta1.OpenTelemetryCollectorSpec{
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						ManagementState: v1beta1.ManagementStateManaged,
 						Replicas:        &one,
 					},
@@ -195,7 +194,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 				},
 				Spec: v1beta1.OpenTelemetryCollectorSpec{
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						ManagementState: v1beta1.ManagementStateManaged,
 						Replicas:        &one,
 					},
@@ -219,7 +217,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 				},
 				Spec: v1beta1.OpenTelemetryCollectorSpec{
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						ManagementState: v1beta1.ManagementStateManaged,
 						Replicas:        &one,
 					},
@@ -247,7 +244,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 					Mode:            v1beta1.ModeSidecar,
 					UpgradeStrategy: "adhoc",
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						Replicas:        &five,
 						ManagementState: v1beta1.ManagementStateManaged,
 					},
@@ -274,7 +270,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 					Mode:            v1beta1.ModeSidecar,
 					UpgradeStrategy: "adhoc",
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						Replicas:        &five,
 						ManagementState: v1beta1.ManagementStateUnmanaged,
 					},
@@ -299,7 +294,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 					Mode:            v1beta1.ModeDeployment,
 					UpgradeStrategy: v1beta1.UpgradeStrategyAutomatic,
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						Replicas:        &one,
 						ManagementState: v1beta1.ManagementStateManaged,
 					},
@@ -328,7 +322,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 				Spec: v1beta1.OpenTelemetryCollectorSpec{
 					Mode: v1beta1.ModeDeployment,
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						ManagementState: v1beta1.ManagementStateManaged,
 						Replicas:        &one,
 					},
@@ -364,7 +357,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 				Spec: v1beta1.OpenTelemetryCollectorSpec{
 					Mode: v1beta1.ModeDeployment,
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						Replicas:        &one,
 						ManagementState: v1beta1.ManagementStateManaged,
 						PodDisruptionBudget: &v1beta1.PodDisruptionBudgetSpec{
@@ -402,7 +394,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 				Spec: v1beta1.OpenTelemetryCollectorSpec{
 					Mode: v1beta1.ModeDeployment,
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						Replicas:        &one,
 						ManagementState: v1beta1.ManagementStateManaged,
 					},
@@ -445,7 +436,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 				Spec: v1beta1.OpenTelemetryCollectorSpec{
 					Mode: v1beta1.ModeDeployment,
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						Replicas:        &one,
 						ManagementState: v1beta1.ManagementStateManaged,
 					},
@@ -483,7 +473,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 				Spec: v1beta1.OpenTelemetryCollectorSpec{
 					Mode: v1beta1.ModeDeployment,
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						Replicas:        &one,
 						ManagementState: v1beta1.ManagementStateManaged,
 					},
@@ -514,7 +503,6 @@ func TestCollectorDefaultingWebhook(t *testing.T) {
 				Spec: v1beta1.OpenTelemetryCollectorSpec{
 					Mode: v1beta1.ModeDeployment,
 					OpenTelemetryCommonFields: v1beta1.OpenTelemetryCommonFields{
-						Args:            map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
 						Replicas:        &one,
 						ManagementState: v1beta1.ManagementStateManaged,
 					},

pkg/collector/upgrade/upgrade_test.go

@@ -141,7 +141,7 @@ func TestEnvVarUpdates(t *testing.T) {
 	require.Equal(t, collectorInstance.Status.Version, persisted.Status.Version)
 
 	currentV := version.Get()
-	currentV.OpenTelemetryCollector = "0.105.0"
+	currentV.OpenTelemetryCollector = "0.110.0"
 	up := &upgrade.VersionUpgrade{
 		Log:      logger,
 		Version:  currentV,

pkg/collector/upgrade/v0_104_0.go

@@ -27,7 +27,7 @@ func upgrade0_104_0_TA(_ VersionUpgrade, otelcol *v1beta1.OpenTelemetryCollector
 }
 
 func upgrade0_104_0(u VersionUpgrade, otelcol *v1beta1.OpenTelemetryCollector) (*v1beta1.OpenTelemetryCollector, error) {
-	v1beta1.ComponentUseLocalHostAsDefaultHost(otelcol)
+	ComponentUseLocalHostAsDefaultHost(otelcol)
 
 	const issueID = "https://github.com/open-telemetry/opentelemetry-collector/issues/8510"
 	warnStr := fmt.Sprintf(
@@ -69,3 +69,23 @@ func TAUnifyEnvVarExpansion(otelcol *v1beta1.OpenTelemetryCollector) {
 		otelcol.Spec.Args[baseFlag] += ",-" + fgFlag
 	}
 }
+
+// ComponentUseLocalHostAsDefaultHost enables component.UseLocalHostAsDefaultHost
+// featuregate on the given collector instance.
+// NOTE: For more details, visit:
+// https://github.com/open-telemetry/opentelemetry-collector/issues/8510
+func ComponentUseLocalHostAsDefaultHost(otelcol *v1beta1.OpenTelemetryCollector) {
+	const (
+		baseFlag = "feature-gates"
+		fgFlag   = "component.UseLocalHostAsDefaultHost"
+	)
+	if otelcol.Spec.Args == nil {
+		otelcol.Spec.Args = make(map[string]string)
+	}
+	args, ok := otelcol.Spec.Args[baseFlag]
+	if !ok || len(args) == 0 {
+		otelcol.Spec.Args[baseFlag] = "-" + fgFlag
+	} else if !strings.Contains(otelcol.Spec.Args[baseFlag], fgFlag) {
+		otelcol.Spec.Args[baseFlag] += ",-" + fgFlag
+	}
+}

pkg/collector/upgrade/v0_104_0_test.go

@@ -56,7 +56,7 @@ func Test0_104_0Upgrade(t *testing.T) {
 		t.Errorf("expect err: nil but got: %v", err)
 	}
 	assert.EqualValues(t,
-		map[string]string{"feature-gates": "-component.UseLocalHostAsDefaultHost"},
+		map[string]string{},
 		col.Spec.Args, "missing featuregate")
 }
 

pkg/collector/upgrade/v0_110_0.go

@@ -0,0 +1,25 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package upgrade
+
+import (
+	"github.com/open-telemetry/opentelemetry-operator/apis/v1beta1"
+)
+
+func upgrade0_110_0(_ VersionUpgrade, otelcol *v1beta1.OpenTelemetryCollector) (*v1beta1.OpenTelemetryCollector, error) { //nolint:unparam
+	envVarExpansionFeatureFlag := "-component.UseLocalHostAsDefaultHost"
+	otelcol.Spec.OpenTelemetryCommonFields.Args = RemoveFeatureGate(otelcol.Spec.OpenTelemetryCommonFields.Args, envVarExpansionFeatureFlag)
+	return otelcol, nil
+}

pkg/collector/upgrade/v0_38_0_test.go

@@ -82,9 +82,8 @@ service:
 
 	// verify
 	assert.Equal(t, map[string]string{
-		"--hii":         "hello",
-		"--arg1":        "",
-		"feature-gates": "-component.UseLocalHostAsDefaultHost",
+		"--hii":  "hello",
+		"--arg1": "",
 	}, res.Spec.Args)
 
 	// verify
@@ -149,8 +148,7 @@ service:
 	// verify
 	assert.YAMLEq(t, configWithLogging, res.Spec.Config)
 	assert.Equal(t, map[string]string{
-		"--hii":         "hello",
-		"--arg1":        "",
-		"feature-gates": "-component.UseLocalHostAsDefaultHost",
+		"--hii":  "hello",
+		"--arg1": "",
 	}, res.Spec.Args)
 }

pkg/collector/upgrade/v0_43_0_test.go

@@ -82,7 +82,6 @@ service:
 	assert.Equal(t, map[string]string{
 		"--test-upgrade43": "true",
 		"--test-arg1":      "otel",
-		"feature-gates":    "-component.UseLocalHostAsDefaultHost",
 	}, res.Spec.Args)
 
 	// verify
@@ -143,7 +142,6 @@ service:
 	assert.Equal(t, map[string]string{
 		"--test-upgrade43": "true",
 		"--test-arg1":      "otel",
-		"feature-gates":    "-component.UseLocalHostAsDefaultHost",
 	}, res.Spec.Args)
 
 }

pkg/collector/upgrade/versions.go

@@ -102,6 +102,10 @@ var (
 			Version:        *semver.MustParse("0.105.0"),
 			upgradeV1beta1: upgrade0_105_0,
 		},
+		{
+			Version:        *semver.MustParse("0.110.0"),
+			upgradeV1beta1: upgrade0_110_0,
+		},
 	}
 
 	// Latest represents the latest version that we need to upgrade. This is not necessarily the latest known version.

tests/e2e-instrumentation/instrumentation-apache-httpd/01-assert.yaml

@@ -46,7 +46,6 @@ spec:
     - name: otel-apache-conf-dir
       mountPath: /usr/local/apache2/conf
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-apache-multicontainer/01-assert.yaml

@@ -76,7 +76,6 @@ spec:
     - name: OTEL_RESOURCE_ATTRIBUTES
     name: myrabbit
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-apache-multicontainer/02-assert.yaml

@@ -56,7 +56,6 @@ spec:
   - image: rabbitmq
     name: myrabbit
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-dotnet-multicontainer/01-assert.yaml

@@ -128,7 +128,6 @@ spec:
     - mountPath: /otel-auto-instrumentation-dotnet
       name: opentelemetry-auto-instrumentation-dotnet
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-dotnet-multicontainer/02-assert.yaml

@@ -85,7 +85,6 @@ spec:
     - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
       readOnly: true
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-dotnet-musl/01-assert.yaml

@@ -67,7 +67,6 @@ spec:
     - mountPath: /otel-auto-instrumentation-dotnet
       name: opentelemetry-auto-instrumentation-dotnet
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-dotnet/01-assert.yaml

@@ -67,7 +67,6 @@ spec:
     - mountPath: /otel-auto-instrumentation-dotnet
       name: opentelemetry-auto-instrumentation-dotnet
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-go/02-assert.yaml

@@ -11,7 +11,6 @@ spec:
   containers:
   - name: productcatalogservice
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   - env:

tests/e2e-instrumentation/instrumentation-java-multicontainer/01-assert.yaml

@@ -110,7 +110,6 @@ spec:
     - mountPath: /otel-auto-instrumentation-java
       name: opentelemetry-auto-instrumentation-java
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-java-multicontainer/02-assert.yaml

@@ -76,7 +76,6 @@ spec:
     - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
       readOnly: true
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-java-other-ns/03-assert.yaml

@@ -59,7 +59,6 @@ spec:
     - mountPath: /otel-auto-instrumentation-java
       name: opentelemetry-auto-instrumentation-java
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-java/01-assert.yaml

@@ -59,7 +59,6 @@ spec:
     - mountPath: /otel-auto-instrumentation-java
       name: opentelemetry-auto-instrumentation-java
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-nginx-contnr-secctx/01-assert.yaml

@@ -49,7 +49,6 @@ spec:
     - mountPath: /etc/nginx
       name: otel-nginx-conf-dir
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-nginx-multicontainer/01-assert.yaml

@@ -89,7 +89,6 @@ spec:
     - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
       readOnly: true
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers:

tests/e2e-instrumentation/instrumentation-nginx-multicontainer/02-assert.yaml

@@ -68,7 +68,6 @@ spec:
     - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
       readOnly: true
   - args:
-    - --feature-gates=-component.UseLocalHostAsDefaultHost
     - --config=env:OTEL_CONFIG
     name: otc-container
   initContainers: