local node_name="$1"
  local container="$2"
  shift 2
  log-dump-ssh "${node_name}" "docker exec \"\$(docker ps -f label=io.kubernetes.container.name=${container} --format \"{{.ID}}\")\" $*"
}

function dump_masters() {
  local master_names=()
  if [[ -n "${use_custom_instance_list}" ]]; then
    while IFS='' read -r line; do master_names+=("$line"); done < <(log_dump_custom_get_instances master)

else
  EXPECTED_NUM_NODES="${NUM_NODES}"
fi

if [[ "${REGISTER_MASTER_KUBELET:-}" == "true" ]]; then
  if [[ "${KUBERNETES_PROVIDER:-}" == "gce" ]]; then
    NUM_MASTERS=$(get-master-replicas-count)
  else
    NUM_MASTERS=1
  fi
  EXPECTED_NUM_NODES=$((EXPECTED_NUM_NODES+NUM_MASTERS))
fi

REQUIRED_NUM_NODES=$((EXPECTED_NUM_NODES - ALLOWED_NOTREADY_NODES))
# Make several attempts to deal with slow cluster birth.
return_value=0

}

function upgrade-master() {
  local num_masters
  num_masters=$(get-master-replicas-count)
  if [[ "${num_masters}" -gt 1 ]]; then
    echo "Upgrade of master not supported if more than one master replica present. The current number of master replicas: ${num_masters}"
    exit 1
  fi

#
# Assumed vars:
#   MASTER_NAME
function get-master-replicas-count() {
  detect-project
  local num_masters
  num_masters=$(gcloud compute instances list \
    --project "${PROJECT}" \
    --filter="name ~ '$(get-replica-name-regexp)'" \
    --format "value(zone)" | wc -l)
  echo -n "${num_masters}"
}

# Prints regexp for full master machine name. In a cluster with replicated master,