identifies tetragon pod managing a pod

Signed-off-by: sandeshv <sandeshkv92@gmail.com>

contrib/k8s-get-tetragon-pod.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: Apache-2.0
+# Copyright Authors of Cilium
+
+set -o errexit
+set -o pipefail
+
+# Given a pod name and namespace, get the corresponding tetragon pod name.
+
+K8S_NAMESPACE="${K8S_NAMESPACE:-kube-system}"
+
+if [[ $# -ne 2  ]]
+then
+	echo "Usage: $(basename "$0") <pod> <namespace>" >&2
+	exit 1
+fi
+TARGET_POD_NAME="$1"
+TARGET_POD_NAMESPACE="$2"
+
+# Get the target pod's node.
+target_pod_node="$(kubectl get pod "${TARGET_POD_NAME}" -n "${TARGET_POD_NAMESPACE}" --no-headers -o custom-columns=:.spec.nodeName)"
+if [[ -z "${target_pod_node}" ]]
+then
+	echo "pod ${TARGET_POD_NAMESPACE}/${TARGET_POD_NAME} has no node assigned" >&2
+	exit 1
+fi
+
+# Get the Cilium pod running on the target pod's node (using exact node matching).
+kubectl get pods -n "${K8S_NAMESPACE}" -l app.kubernetes.io/name=tetragon --no-headers -o custom-columns=:.metadata.name,:.spec.nodeName | awk -v node="${target_pod_node}" '$2==node {print $1}'