Make sure OTLP exporter can report data to OTLP ingress/route without additional configuration

.chloggen/1967-ingress-path.yaml

@@ -0,0 +1,21 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+
+# The name of the component, or a single word describing the area of concern, (e.g. operator, target allocator, github action)
+component: operator
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Make sure OTLP export can report data to OTLP ingress/route without additional configuration
+
+# One or more tracking issues related to the change
+issues: [1967]
+
+# (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: | 
+    The ingress can be configured to create a single host with multiple paths or 
+    multiple hosts with subdomains (one per receiver port).
+    The path from OpenShift route was removed.
+    The port names are truncate to 15 characters. Users with custom receivers
+    which create ports with longer name might need to update their configuration.

Makefile

@@ -36,7 +36,7 @@ BUNDLE_DEFAULT_CHANNEL := --default-channel=$(DEFAULT_CHANNEL)
 endif
 BUNDLE_METADATA_OPTS ?= $(BUNDLE_CHANNELS) $(BUNDLE_DEFAULT_CHANNEL)
 
-CRD_OPTIONS ?= "crd:generateEmbeddedObjectMeta=true"
+CRD_OPTIONS ?= "crd:generateEmbeddedObjectMeta=true,maxDescLen=200"
 
 # Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
 ifeq (,$(shell go env GOBIN))
@@ -484,4 +484,4 @@ catalog-build: opm bundle-build bundle-push ## Build a catalog image.
 # Push the catalog image.
 .PHONY: catalog-push
 catalog-push: ## Push a catalog image.
-	docker push $(CATALOG_IMG)
+	docker push $(CATALOG_IMG)

apis/v1alpha1/ingress_type.go

@@ -46,3 +46,18 @@ const (
 	// and re-encrypt using a new certificate.
 	TLSRouteTerminationTypeReencrypt TLSRouteTerminationType = "reencrypt"
 )
+
+// IngressRuleType defines how the collector receivers will be exposed in the Ingress.
+//
+// +kubebuilder:validation:Enum=path;subdomain
+type IngressRuleType string
+
+const (
+	// IngressRuleTypePath configures Ingress to use single host with multiple paths.
+	// This configuration might require additional ingress setting to rewrite paths.
+	IngressRuleTypePath IngressRuleType = "path"
+
+	// IngressRuleTypeSubdomain configures Ingress to use multiple hosts - one for each exposed
+	// receiver port. The port name is used as a subdomain for the host defined in the Ingress e.g. otlp-http.example.com.
+	IngressRuleTypeSubdomain IngressRuleType = "subdomain"
+)

apis/v1alpha1/opentelemetrycollector_types.go

@@ -48,9 +48,15 @@ const (
 // SEE: OpenTelemetryCollector.spec.ports[index].
 type Ingress struct {
 	// Type default value is: ""
-	// Supported types are: ingress
+	// Supported types are: ingress, route
 	Type IngressType `json:"type,omitempty"`
 
+	// RuleType defines how Ingress exposes collector receivers.
+	// IngressRuleTypePath ("path") exposes each receiver port on a unique path on single domain defined in Hostname.
+	// IngressRuleTypeSubdomain ("subdomain") exposes each receiver port on a unique subdomain of Hostname.
+	// Default is IngressRuleTypePath ("path").
+	RuleType IngressRuleType `json:"ruleType,omitempty"`
+
 	// Hostname by which the ingress proxy can be reached.
 	// +optional
 	Hostname string `json:"hostname,omitempty"`

apis/v1alpha1/opentelemetrycollector_webhook.go

@@ -109,6 +109,9 @@ func (r *OpenTelemetryCollector) Default() {
 	if r.Spec.Ingress.Type == IngressTypeRoute && r.Spec.Ingress.Route.Termination == "" {
 		r.Spec.Ingress.Route.Termination = TLSRouteTerminationTypeEdge
 	}
+	if r.Spec.Ingress.Type == IngressTypeNginx && r.Spec.Ingress.RuleType == "" {
+		r.Spec.Ingress.RuleType = IngressRuleTypePath
+	}
 }
 
 // +kubebuilder:webhook:verbs=create;update,path=/validate-opentelemetry-io-v1alpha1-opentelemetrycollector,mutating=false,failurePolicy=fail,groups=opentelemetry.io,resources=opentelemetrycollectors,versions=v1alpha1,name=vopentelemetrycollectorcreateupdate.kb.io,sideEffects=none,admissionReviewVersions=v1
@@ -248,6 +251,9 @@ func (r *OpenTelemetryCollector) validateCRDSpec() error {
 			ModeDeployment, ModeDaemonSet, ModeStatefulSet,
 		)
 	}
+	if r.Spec.Ingress.RuleType == IngressRuleTypeSubdomain && (r.Spec.Ingress.Hostname == "" || r.Spec.Ingress.Hostname == "*") {
+		return fmt.Errorf("a valid Ingress hostname has to be defined for subdomain ruleType")
+	}
 
 	if r.Spec.LivenessProbe != nil {
 		if r.Spec.LivenessProbe.InitialDelaySeconds != nil && *r.Spec.LivenessProbe.InitialDelaySeconds < 0 {

apis/v1alpha1/opentelemetrycollector_webhook_test.go

@@ -619,6 +619,17 @@ func TestOTELColValidatingWebhook(t *testing.T) {
 			},
 			expectedErr: "the OpenTelemetry Collector mode is set to sidecar, which does not support the attribute 'AdditionalContainers'",
 		},
+		{
+			name: "missing ingress hostname for subdomain ruleType",
+			otelcol: OpenTelemetryCollector{
+				Spec: OpenTelemetryCollectorSpec{
+					Ingress: Ingress{
+						RuleType: IngressRuleTypeSubdomain,
+					},
+				},
+			},
+			expectedErr: "a valid Ingress hostname has to be defined for subdomain ruleType",
+		},
 	}
 
 	for _, test := range tests {