Allow running daemonset in hostNetwork mode

api/v1alpha1/opentelemetrycollector_types.go

@@ -61,6 +61,11 @@ type OpenTelemetryCollectorSpec struct {
 	// +operator-sdk:gen-csv:customresourcedefinitions.specDescriptors=true
 	SecurityContext *v1.SecurityContext `json:"securityContext,omitempty"`
 
+	// HostNetwork indicates if the pod should run in the host networking namespace.
+	// +optional
+	// +operator-sdk:gen-csv:customresourcedefinitions.specDescriptors=true
+	HostNetwork bool `json:"hostNetwork,omitempty"`
+
 	// VolumeClaimTemplates will provide stable storage using PersistentVolumes. Only available when the mode=statefulset.
 	// +optional
 	// +listType=atomic

bundle/manifests/opentelemetry.io_opentelemetrycollectors.yaml

@@ -182,6 +182,10 @@ spec:
                   - name
                   type: object
                 type: array
+              hostNetwork:
+                description: HostNetwork indicates if the pod should run in the host
+                  networking namespace.
+                type: boolean
               image:
                 description: Image indicates the container image to use for the OpenTelemetry
                   Collector.

config/crd/bases/opentelemetry.io_opentelemetrycollectors.yaml

@@ -170,6 +170,10 @@ spec:
                   - name
                   type: object
                 type: array
+              hostNetwork:
+                description: HostNetwork indicates if the pod should run in the host
+                  networking namespace.
+                type: boolean
               image:
                 description: Image indicates the container image to use for the OpenTelemetry
                   Collector.

docs/otelcol_cr_spec.md

@@ -64,6 +64,9 @@ spec:
 
   // +optional SecurityContext will be set as the container security context.
   securityContext: {}
+
+  // +optional HostNetwork indicates if the pod should run in the host networking namespace.
+  hostNetwork: false
 
   // +optional Toleration to schedule OpenTelemetry Collector pods.
   // This is only relevant to daemonsets, statefulsets and deployments

pkg/collector/daemonset.go

@@ -53,6 +53,7 @@ func DaemonSet(cfg config.Config, logger logr.Logger, otelcol v1alpha1.OpenTelem
 					Containers:         []corev1.Container{Container(cfg, logger, otelcol)},
 					Volumes:            Volumes(cfg, otelcol),
 					Tolerations:        otelcol.Spec.Tolerations,
+					HostNetwork:        otelcol.Spec.HostNetwork,
 				},
 			},
 		},

pkg/collector/daemonset_test.go

@@ -56,3 +56,19 @@ func TestDaemonSetNewDefault(t *testing.T) {
 	// the pod selector should match the pod spec's labels
 	assert.Equal(t, d.Spec.Selector.MatchLabels, d.Spec.Template.Labels)
 }
+
+func TestDaemonsetHostNetwork(t *testing.T) {
+	// test
+	d1 := DaemonSet(config.New(), logger, v1alpha1.OpenTelemetryCollector{
+		Spec: v1alpha1.OpenTelemetryCollectorSpec{},
+	})
+	assert.False(t, d1.Spec.Template.Spec.HostNetwork)
+
+	// verify custom
+	d2 := DaemonSet(config.New(), logger, v1alpha1.OpenTelemetryCollector{
+		Spec: v1alpha1.OpenTelemetryCollectorSpec{
+			HostNetwork: true,
+		},
+	})
+	assert.True(t, d2.Spec.Template.Spec.HostNetwork)
+}

tests/e2e/daemonset-features/00-assert.yaml

@@ -0,0 +1,14 @@
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: daemonset-collector
+spec:
+  template:
+    spec:
+       hostNetwork: true
+       containers:
+       - args:
+         - --config=/conf/collector.yaml
+         name: otc-container
+status:
+  numberReady: 1

tests/e2e/daemonset-features/00-install.yaml

@@ -0,0 +1,21 @@
+apiVersion: opentelemetry.io/v1alpha1
+kind: OpenTelemetryCollector
+metadata:
+  name: daemonset 
+spec:
+  mode: daemonset 
+  hostNetwork: true
+  config: |
+    receivers:
+      jaeger:
+        protocols:
+          grpc:
+    processors:
+    exporters:
+      logging:
+    service:
+      pipelines:
+        traces:
+          receivers: [jaeger]
+          processors: []
+          exporters: [logging]