OpenShift Network Helpers

tcpdump-pod

#!/bin/bash
set -euo pipefail

NAMESPACE=$1
NAME=$2
IMAGE="${IMAGE:-quay.io/dmace/ditm}"

NODE_NAME="$(oc get --namespace $NAMESPACE pods $NAME -o go-template='{{ .spec.nodeName }}')"
CONTAINER_ID_URI="$(oc get --namespace $NAMESPACE pods $NAME -o go-template='{{ (index .status.containerStatuses 0).containerID }}')"
CONTAINER_ID="${CONTAINER_ID_URI:8}"

oc debug --quiet --image $IMAGE nodes/$NODE_NAME --tty=true CONTAINER_ID=$CONTAINER_ID -- /bin/bash -c $'PID=$(chroot /host crictl inspect $CONTAINER_ID -o yaml | grep pid | awk \'{print $2}\'); echo PID=$PID;nsenter -t $PID --net tcpdump -U'