johndmulhausen
6bd2f3f318
git-subtree-dir: k8smain git-subtree-split: 719158d2c8788c30cc9e1c51bbebb53c5801524e
62 lines
1.8 KiB
Go
62 lines
1.8 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package node
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import (
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"fmt"
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"net"
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"os/exec"
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"strings"
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"github.com/golang/glog"
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"k8s.io/kubernetes/pkg/api"
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)
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func GetHostname(hostnameOverride string) string {
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hostname := hostnameOverride
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if string(hostname) == "" {
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nodename, err := exec.Command("uname", "-n").Output()
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if err != nil {
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glog.Fatalf("Couldn't determine hostname: %v", err)
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}
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hostname = string(nodename)
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}
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return strings.ToLower(strings.TrimSpace(hostname))
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}
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// GetNodeHostIP returns the provided node's IP, based on the priority:
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// 1. NodeInternalIP
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// 2. NodeExternalIP
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// 3. NodeLegacyHostIP
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func GetNodeHostIP(node *api.Node) (net.IP, error) {
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addresses := node.Status.Addresses
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addressMap := make(map[api.NodeAddressType][]api.NodeAddress)
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for i := range addresses {
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addressMap[addresses[i].Type] = append(addressMap[addresses[i].Type], addresses[i])
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}
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if addresses, ok := addressMap[api.NodeInternalIP]; ok {
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return net.ParseIP(addresses[0].Address), nil
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}
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if addresses, ok := addressMap[api.NodeExternalIP]; ok {
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return net.ParseIP(addresses[0].Address), nil
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}
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if addresses, ok := addressMap[api.NodeLegacyHostIP]; ok {
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return net.ParseIP(addresses[0].Address), nil
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}
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return nil, fmt.Errorf("host IP unknown; known addresses: %v", addresses)
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}
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