gets workloads that have istio proxy sidecar

get_istio_workloads.sh

#!/bin/bash

# 1. get all pod containers with istio proxy sidecars
# 2. get pod app labels (some have app, others have app.kubernetes.io/name)
# 3. return only uniques and not nulls
version=1.19.0
kubectl get pods -A -o json | \
  jq "[.items[] | select(.spec.containers[].image | contains(\"istio/proxyv2:$version\"))]" | \
  jq '[.[].metadata.labels.app, .[].metadata.labels."app.kubernetes.io/name"]' | \
  jq 'unique  | .[] | select( . != null)'