Add node and pod ip env vars automatically

Author: TylerHelmuth

pkg/constants/env.go

@@ -33,7 +33,9 @@ const (
 
 	EnvPodName  = "OTEL_RESOURCE_ATTRIBUTES_POD_NAME"
 	EnvPodUID   = "OTEL_RESOURCE_ATTRIBUTES_POD_UID"
+	EnvPodIP    = "OTEL_POD_IP"
 	EnvNodeName = "OTEL_RESOURCE_ATTRIBUTES_NODE_NAME"
+	EnvNodeIP   = "OTEL_NODE_IP"
 
 	FlagApacheHttpd = "enable-apache-httpd-instrumentation"
 	FlagDotNet      = "enable-dotnet-instrumentation"

pkg/instrumentation/sdk.go

@@ -235,6 +235,32 @@ func getContainerIndex(containerName string, pod corev1.Pod) int {
 
 func (i *sdkInjector) injectCommonEnvVar(otelinst v1alpha1.Instrumentation, pod corev1.Pod, index int) corev1.Pod {
 	container := &pod.Spec.Containers[index]
+
+	idx := getIndexOfEnv(container.Env, constants.EnvNodeIP)
+	if idx == -1 {
+		container.Env = append(container.Env, corev1.EnvVar{
+			Name: constants.EnvNodeIP,
+			ValueFrom: &corev1.EnvVarSource{
+				FieldRef: &corev1.ObjectFieldSelector{
+					FieldPath: "status.hostIP",
+				},
+			},
+		})
+	}
+
+	idx = getIndexOfEnv(container.Env, constants.EnvPodIP)
+	if idx == -1 {
+		container.Env = append(container.Env, corev1.EnvVar{
+			Name: constants.EnvPodIP,
+			ValueFrom: &corev1.EnvVarSource{
+				FieldRef: &corev1.ObjectFieldSelector{
+					APIVersion: "v1",
+					FieldPath:  "status.podIP",
+				},
+			},
+		})
+	}
+
 	for _, env := range otelinst.Spec.Env {
 		idx := getIndexOfEnv(container.Env, env.Name)
 		if idx == -1 {