OpenShift OVN Northbound DB CLI Access

ovncli.sh

#!/bin/bash
# Connect to the OVN northbound database pod.
# Optionally specify the node and or command
# https://guifreelife.com/blog/2024/11/19/Open-Virtual-Network-Inspection-on-OpenShift/

node=$1; shift; cmd=$*

if [[ -n "$node" ]]; then
    nbdbpod=$(oc get pod \
            -l app=ovnkube-node \
            -n openshift-ovn-kubernetes \
            -o go-template='{{range .items}}{{if eq .spec.nodeName "'$node'"}}{{.metadata.name}}{{"\n"}}{{end}}{{end}}')
fi

if [[ -z "$nbdbpod" ]]; then
    nbdbpod=$(oc get pod \
                -l app=ovnkube-node \
                -n openshift-ovn-kubernetes \
                -o jsonpath='{.items[0].metadata.name}')
fi

# hide any websocket errs
oc rsh -c nbdb -n openshift-ovn-kubernetes $nbdbpod $cmd 2>/dev/null