Some control plane pods are not receiving the tolerations specified using the hypershift create cluster azure --toleration command.

1. Create Azure HC with hypershift create cluster azure --toleration key=foo-bar.baz/quux,operator=Exists --toleration=key=fred,operator=Equal,value=foo,effect=NoSchedule --toleration key=waldo,operator=Equal,value=bar,effect=NoExecute,tolerationSeconds=3600 ... 

2. Run the following script against the MC

NAMESPACE="clusters-XXX"
PODS="$(oc get pods -n "$NAMESPACE" -o jsonpath='{.items[*].metadata.name}')"

for POD in $PODS; do
  echo "Checking pod: $POD"  
  tolerations="$(oc get po -n $NAMESPACE $POD -o jsonpath='{.spec.tolerations}' | jq -c --sort-keys)"
  failed="false"
  
  if ! grep -q '"key":"foo-bar.baz/quux","operator":"Exists"' <<< "$tolerations"; then
    echo "No foo-bar.baz/quux key found" >&2
    failed="true"
  fi
  
  if ! grep -q '"effect":"NoSchedule","key":"fred","operator":"Equal","value":"foo"' <<< "$tolerations"; then
    echo "No fred key found" >&2
    failed="true"
  fi
  
  if ! grep -q '"effect":"NoExecute","key":"waldo","operator":"Equal","tolerationSeconds":3600,"value":"bar"' <<< "$tolerations"; then
    echo "No waldo key found" >&2
    failed="true"
  fi
  
  if [[ $failed == "true" ]]; then
    echo "Tolerations: "
    echo "$tolerations" | jq --sort-keys
  fi
  echo 
done 

3. Take note of the results 

https://drive.google.com/drive/folders/1MQYihLSaK_9WDq3b-H7vx-LheSX69d2O?usp=sharing

All specified tolerations are propagated to all control plane pods.