mirror of https://github.com/kubernetes/kops.git
119 lines
3.3 KiB
Go
119 lines
3.3 KiB
Go
/*
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Copyright 2019 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 model
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import (
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"k8s.io/klog/v2"
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"k8s.io/kops/pkg/apis/kops"
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"k8s.io/kops/upup/pkg/fi"
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"k8s.io/kops/upup/pkg/fi/nodeup/nodetasks"
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"k8s.io/kops/util/pkg/distributions"
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)
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// NTPBuilder installs and starts NTP, to ensure accurate clock times.
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// As well as general log confusion, clock-skew of more than 5 minutes
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// causes AWS API calls to fail
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type NTPBuilder struct {
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*NodeupModelContext
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}
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var _ fi.NodeupModelBuilder = &NTPBuilder{}
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// Build is responsible for configuring NTP
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func (b *NTPBuilder) Build(c *fi.NodeupModelBuilderContext) error {
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if b.NodeupModelContext.NodeupConfig.NTPUnmanaged {
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klog.Infof("Managed is set to false; won't install NTP")
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return nil
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}
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switch b.Distribution {
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case distributions.DistributionContainerOS:
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klog.Infof("Detected ContainerOS; won't install ntp")
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return nil
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case distributions.DistributionFlatcar:
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klog.Infof("Detected Flatcar; won't install ntp")
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return nil
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}
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var ntpHost string
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switch b.CloudProvider() {
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case kops.CloudProviderAWS:
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ntpHost = "169.254.169.123"
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case kops.CloudProviderGCE:
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ntpHost = "time.google.com"
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default:
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ntpHost = ""
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}
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if !b.RunningOnGCE() && !b.RunningOnAzure() && b.Distribution.IsUbuntu() && b.Distribution.Version() <= 20.04 {
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if ntpHost != "" {
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c.AddTask(b.buildTimesyncdConf("/etc/systemd/timesyncd.conf", ntpHost))
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}
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c.AddTask((&nodetasks.Service{Name: "systemd-timesyncd"}).InitDefaults())
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} else if b.Distribution.IsDebianFamily() {
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c.AddTask(&nodetasks.Package{Name: "chrony"})
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if ntpHost != "" {
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c.AddTask(b.buildChronydConf("/etc/chrony/chrony.conf", ntpHost))
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}
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c.AddTask((&nodetasks.Service{Name: "chrony"}).InitDefaults())
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} else if b.Distribution.IsRHELFamily() {
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c.AddTask(&nodetasks.Package{Name: "chrony"})
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if ntpHost != "" {
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c.AddTask(b.buildChronydConf("/etc/chrony.conf", ntpHost))
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}
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c.AddTask((&nodetasks.Service{Name: "chronyd"}).InitDefaults())
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} else {
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klog.Warningf("unknown distribution, skipping ntp install: %v", b.Distribution)
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return nil
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}
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return nil
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}
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func (b *NTPBuilder) buildChronydConf(path string, host string) *nodetasks.File {
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conf := `# Built by kOps - do NOT edit
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pool ` + host + ` prefer iburst
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driftfile /var/lib/chrony/drift
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leapsectz right/UTC
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logdir /var/log/chrony
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makestep 1.0 3
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maxupdateskew 100.0
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rtcsync
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`
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return &nodetasks.File{
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Path: path,
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Contents: fi.NewStringResource(conf),
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Type: nodetasks.FileType_File,
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Mode: s("0644"),
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}
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}
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func (b *NTPBuilder) buildTimesyncdConf(path string, host string) *nodetasks.File {
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conf := `# Built by Kops - do NOT edit
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[Time]
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NTP=` + host + `
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`
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return &nodetasks.File{
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Path: path,
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Contents: fi.NewStringResource(conf),
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Type: nodetasks.FileType_File,
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Mode: s("0644"),
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}
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}
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