mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
synced 2025-11-04 12:18:16 +00:00
105 lines
3.2 KiB
Go
105 lines
3.2 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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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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"encoding/json"
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"fmt"
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"net"
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"os"
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"strings"
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"time"
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"github.com/golang/glog"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/api/unversioned"
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clientset "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
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)
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func GetHostname(hostnameOverride string) string {
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var hostname string = hostnameOverride
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if hostname == "" {
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nodename, err := os.Hostname()
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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 = 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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// Helper function that builds a string identifier that is unique per failure-zone
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// Returns empty-string for no zone
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func GetZoneKey(node *api.Node) string {
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labels := node.Labels
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if labels == nil {
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return ""
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}
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region, _ := labels[unversioned.LabelZoneRegion]
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failureDomain, _ := labels[unversioned.LabelZoneFailureDomain]
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if region == "" && failureDomain == "" {
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return ""
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}
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// We include the null character just in case region or failureDomain has a colon
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// (We do assume there's no null characters in a region or failureDomain)
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// As a nice side-benefit, the null character is not printed by fmt.Print or glog
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return region + ":\x00:" + failureDomain
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}
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// SetNodeCondition updates specific node condition with patch operation.
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func SetNodeCondition(c clientset.Interface, node string, condition api.NodeCondition) error {
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generatePatch := func(condition api.NodeCondition) ([]byte, error) {
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raw, err := json.Marshal(&[]api.NodeCondition{condition})
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if err != nil {
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return nil, err
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}
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return []byte(fmt.Sprintf(`{"status":{"conditions":%s}}`, raw)), nil
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}
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condition.LastHeartbeatTime = unversioned.NewTime(time.Now())
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patch, err := generatePatch(condition)
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if err != nil {
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return nil
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}
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_, err = c.Core().Nodes().PatchStatus(node, patch)
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return err
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}
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