k8s.io/kubernetes@v1.31.0-alpha.0.0.20240520171757-56147500dadc/cluster/gce/gci/kube-master-internal-route.sh (about)

     1  #!/usr/bin/env bash
     2  
     3  # Copyright 2016 The Kubernetes Authors.
     4  #
     5  # Licensed under the Apache License, Version 2.0 (the "License");
     6  # you may not use this file except in compliance with the License.
     7  # You may obtain a copy of the License at
     8  #
     9  #     http://www.apache.org/licenses/LICENSE-2.0
    10  #
    11  # Unless required by applicable law or agreed to in writing, software
    12  # distributed under the License is distributed on an "AS IS" BASIS,
    13  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  # See the License for the specific language governing permissions and
    15  # limitations under the License.
    16  
    17  METADATA_ENDPOINT="http://metadata.google.internal/computeMetadata/v1/instance/attributes/kube-master-internal-ip"
    18  METADATA_HEADER="Metadata-Flavor: Google"
    19  ip=$(curl -s --fail ${METADATA_ENDPOINT} -H "${METADATA_HEADER}")
    20  if [ -n "$ip" ];
    21  then
    22      # Check if route is already set if not set it
    23      if ! sudo ip route show table local | grep -q "$(echo "$ip" | cut -d'/' -f 1)";
    24      then
    25              sudo ip route add to local "${ip}/32" dev "$(ip route | grep default | awk '{print $5}')"
    26      fi
    27  fi