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kubeadm: Don't downgrade etcd on cluster downgrade

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This commit is contained in:
Lucas Käldström 2017-12-11 19:37:18 +02:00
parent 8c1ee761d2
commit f99aae9ce3
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GPG Key ID: 3FA3783D77751514
5 changed files with 9 additions and 11 deletions
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1
cmd/kubeadm/app/cmd/init.go
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@ -228,7 +228,6 @@ func AddInitOtherFlags(flagSet *flag.FlagSet, cfgPath *string, skipPreFlight, sk
// NewInit validates given arguments and instantiates Init struct with provided information.
func NewInit(cfgPath string, cfg *kubeadmapi.MasterConfiguration, ignorePreflightErrors sets.String, skipTokenPrint, dryRun bool, criSocket string) (*Init, error) {
fmt.Println("[kubeadm] WARNING: kubeadm is currently in beta")
if cfgPath != "" {
b, err := ioutil.ReadFile(cfgPath)

1
cmd/kubeadm/app/cmd/join.go
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@ -199,7 +199,6 @@ type Join struct {
// NewJoin instantiates Join struct with given arguments
func NewJoin(cfgPath string, args []string, cfg *kubeadmapi.NodeConfiguration, ignorePreflightErrors sets.String, criSocket string) (*Join, error) {
fmt.Println("[kubeadm] WARNING: kubeadm is currently in beta")
if cfg.NodeName == "" {
cfg.NodeName = nodeutil.GetHostname("")

2
cmd/kubeadm/app/cmd/upgrade/apply.go
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@ -203,7 +203,7 @@ func SetImplicitFlags(flags *applyFlags) error {
// EnforceVersionPolicies makes sure that the version the user specified is valid to upgrade to
// There are both fatal and skippable (with --force) errors
func EnforceVersionPolicies(flags *applyFlags, versionGetter upgrade.VersionGetter) error {
fmt.Printf("[upgrade/version] You have chosen to upgrade to version %q\n", flags.newK8sVersionStr)
fmt.Printf("[upgrade/version] You have chosen to change the cluster version to %q\n", flags.newK8sVersionStr)
versionSkewErrs := upgrade.EnforceVersionPolicies(versionGetter, flags.newK8sVersionStr, flags.newK8sVersion, flags.parent.allowExperimentalUpgrades, flags.parent.allowRCUpgrades)
if versionSkewErrs != nil {

4
cmd/kubeadm/app/features/features.go
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@ -33,7 +33,7 @@ const (
// CoreDNS is alpha in v1.9
CoreDNS = "CoreDNS"
// SelfHosting is beta in v1.9
// SelfHosting is alpha in v1.8 and v1.9
SelfHosting = "SelfHosting"
// StoreCertsInSecrets is alpha in v1.8 and v1.9
@ -47,7 +47,7 @@ var v190 = version.MustParseSemantic("v1.9.0-alpha.1")
// InitFeatureGates are the default feature gates for the init command
var InitFeatureGates = FeatureList{
SelfHosting: {FeatureSpec: utilfeature.FeatureSpec{Default: false, PreRelease: utilfeature.Beta}},
SelfHosting: {FeatureSpec: utilfeature.FeatureSpec{Default: false, PreRelease: utilfeature.Alpha}},
StoreCertsInSecrets: {FeatureSpec: utilfeature.FeatureSpec{Default: false, PreRelease: utilfeature.Alpha}},
// We don't want to advertise this feature gate exists in v1.9 to avoid confusion as it is not yet working
HighAvailability: {FeatureSpec: utilfeature.FeatureSpec{Default: false, PreRelease: utilfeature.Alpha}, MinimumVersion: v190, HiddenInHelpText: true},

12
cmd/kubeadm/app/phases/upgrade/staticpods.go
View File

@ -154,7 +154,7 @@ func upgradeComponent(component string, waiter apiclient.Waiter, pathMgr StaticP
return rollbackOldManifests(recoverManifests, err, pathMgr, recoverEtcd)
}
fmt.Printf("[upgrade/staticpods] Moved upgraded manifest to %q and backed up old manifest to %q\n", currentManifestPath, backupManifestPath)
fmt.Printf("[upgrade/staticpods] Moved new manifest to %q and backed up old manifest to %q\n", currentManifestPath, backupManifestPath)
fmt.Println("[upgrade/staticpods] Waiting for the kubelet to restart the component")
// Wait for the mirror Pod hash to change; otherwise we'll run into race conditions here when the kubelet hasn't had time to
@ -178,7 +178,7 @@ func upgradeComponent(component string, waiter apiclient.Waiter, pathMgr StaticP
func performEtcdStaticPodUpgrade(waiter apiclient.Waiter, pathMgr StaticPodPathManager, cfg *kubeadmapi.MasterConfiguration, recoverManifests map[string]string) (bool, error) {
// Add etcd static pod spec only if external etcd is not configured
if len(cfg.Etcd.Endpoints) != 0 {
return false, fmt.Errorf("external etcd cannot be upgraded with kubeadm")
return false, fmt.Errorf("external etcd detected, won't try to change any etcd state")
}
// Checking health state of etcd before proceeding with the upgrtade
etcdCluster := util.LocalEtcdCluster{}
@ -191,7 +191,7 @@ func performEtcdStaticPodUpgrade(waiter apiclient.Waiter, pathMgr StaticPodPathM
backupEtcdDir := pathMgr.BackupEtcdDir()
runningEtcdDir := cfg.Etcd.DataDir
if err := util.CopyDir(runningEtcdDir, backupEtcdDir); err != nil {
return true, fmt.Errorf("fail to back up etcd data with %v", err)
return true, fmt.Errorf("fail to back up etcd data: %v", err)
}
// Need to check currently used version and version from constants, if differs then upgrade
@ -206,7 +206,7 @@ func performEtcdStaticPodUpgrade(waiter apiclient.Waiter, pathMgr StaticPodPathM
// Comparing current etcd version with desired to catch the same version or downgrade condition and fail on them.
if desiredEtcdVersion.LessThan(currentEtcdVersion) {
return true, fmt.Errorf("the requested etcd version (%s) for Kubernetes v(%s) is lower than the currently running version (%s)", desiredEtcdVersion.String(), cfg.KubernetesVersion, currentEtcdVersion.String())
return false, fmt.Errorf("the desired etcd version for this Kubernetes version %q is %q, but the current etcd version is %q. Won't downgrade etcd, instead just continue", cfg.KubernetesVersion, desiredEtcdVersion.String(), currentEtcdVersion.String())
}
// For the case when desired etcd version is the same as current etcd version
if strings.Compare(desiredEtcdVersion.String(), currentEtcdVersion.String()) == 0 {
@ -288,7 +288,7 @@ func StaticPodControlPlane(waiter apiclient.Waiter, pathMgr StaticPodPathManager
if fatal {
return err
}
fmt.Printf("[etcd] non fatal issue encountered during upgrade: %v\n", err)
fmt.Printf("[upgrade/etcd] non fatal issue encountered during upgrade: %v\n", err)
}
}
@ -298,7 +298,7 @@ func StaticPodControlPlane(waiter apiclient.Waiter, pathMgr StaticPodPathManager
}
// Write the updated static Pod manifests into the temporary directory
fmt.Printf("[upgrade/staticpods] Writing upgraded Static Pod manifests to %q\n", pathMgr.TempManifestDir())
fmt.Printf("[upgrade/staticpods] Writing new Static Pod manifests to %q\n", pathMgr.TempManifestDir())
err = controlplane.CreateInitStaticPodManifestFiles(pathMgr.TempManifestDir(), cfg)
if err != nil {
return fmt.Errorf("error creating init static pod manifest files: %v", err)