upgrade

package
v0.0.0-...-75a4fab Latest Latest
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 Go to latest Published: Mar 24, 2021 License: Apache-2.0 Imports: 42 Imported by: 0

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Index

Constants

View Source 
const (
	// MaximumAllowedMinorVersionUpgradeSkew describes how many minor versions kubeadm can upgrade the control plane version in one go
	MaximumAllowedMinorVersionUpgradeSkew = 1

	// MaximumAllowedMinorVersionDowngradeSkew describes how many minor versions kubeadm can upgrade the control plane version in one go
	MaximumAllowedMinorVersionDowngradeSkew = 1

	// MaximumAllowedMinorVersionKubeletSkew describes how many minor versions the control plane version and the kubelet can skew in a kubeadm cluster
	MaximumAllowedMinorVersionKubeletSkew = 1
)
View Source 
const (
	// UpgradeManifestTimeout is timeout of upgrading the static pod manifest
	UpgradeManifestTimeout = 5 * time.Minute
)

Variables

This section is empty.

Functions

func BackupAPIServerCertIfNeeded 

func BackupAPIServerCertIfNeeded(cfg *kubeadmapi.InitConfiguration, dryRun bool) error

BackupAPIServerCertIfNeeded rotates the kube-apiserver certificate if older than 180 days

func CheckClusterHealth 

func CheckClusterHealth(client clientset.Interface, ignoreChecksErrors sets.String) error

CheckClusterHealth makes sure: - the API /healthz endpoint is healthy - all control-plane Nodes are Ready - (if self-hosted) that there are DaemonSets with at least one Pod for all control plane components - (if static pod-hosted) that all required Static Pod manifests exist on disk

func IsControlPlaneSelfHosted 

func IsControlPlaneSelfHosted(client clientset.Interface) bool

IsControlPlaneSelfHosted returns whether the control plane is self hosted or not

func PerformPostUpgradeTasks 

func PerformPostUpgradeTasks(client clientset.Interface, cfg *kubeadmapi.InitConfiguration, newK8sVer *version.Version, dryRun bool) error

PerformPostUpgradeTasks runs nearly the same functions as 'kubeadm init' would do Note that the mark-control-plane phase is left out, not needed, and no token is created as that doesn't belong to the upgrade

func PrepullImagesInParallel 

func PrepullImagesInParallel(kubePrepuller Prepuller, timeout time.Duration, componentsToPrepull []string) error

PrepullImagesInParallel creates DaemonSets synchronously but waits in parallel for the images to pull

func StaticPodControlPlane 

func StaticPodControlPlane(client clientset.Interface, waiter apiclient.Waiter, pathMgr StaticPodPathManager, cfg *kubeadmapi.InitConfiguration, etcdUpgrade bool, oldEtcdClient, newEtcdClient etcdutil.ClusterInterrogator) error

StaticPodControlPlane upgrades a static pod-hosted control plane

Types

type ClusterState 

type ClusterState struct {
	// KubeVersion describes the version of the Kubernetes API Server, Controller Manager, Scheduler and Proxy.
	KubeVersion string
	// DNSType
	DNSType kubeadmapi.DNSAddOnType
	// DNSVersion describes the version of the kube-dns images used and manifest version
	DNSVersion string
	// KubeadmVersion describes the version of the kubeadm CLI
	KubeadmVersion string
	// KubeletVersions is a map with a version number linked to the amount of kubelets running that version in the cluster
	KubeletVersions map[string]uint16
	// EtcdVersion represents the version of etcd used in the cluster
	EtcdVersion string
}

ClusterState describes the state of certain versions for a cluster

type DaemonSetPrepuller 

type DaemonSetPrepuller struct {
	// contains filtered or unexported fields
}

DaemonSetPrepuller makes sure the control-plane images are available on all control-planes

func NewDaemonSetPrepuller 

func NewDaemonSetPrepuller(client clientset.Interface, waiter apiclient.Waiter, cfg *kubeadmapi.ClusterConfiguration) *DaemonSetPrepuller

NewDaemonSetPrepuller creates a new instance of the DaemonSetPrepuller struct

func (*DaemonSetPrepuller) CreateFunc 

func (d *DaemonSetPrepuller) CreateFunc(component string) error

CreateFunc creates a DaemonSet for making the image available on every relevant node

func (*DaemonSetPrepuller) DeleteFunc 

func (d *DaemonSetPrepuller) DeleteFunc(component string) error

DeleteFunc deletes the DaemonSet used for making the image available on every relevant node

func (*DaemonSetPrepuller) WaitFunc 

func (d *DaemonSetPrepuller) WaitFunc(component string)

WaitFunc waits for all Pods in the specified DaemonSet to be in the Running state

type KubeStaticPodPathManager 

type KubeStaticPodPathManager struct {
	// contains filtered or unexported fields
}

KubeStaticPodPathManager is a real implementation of StaticPodPathManager that is used when upgrading a static pod cluster

func (*KubeStaticPodPathManager) BackupEtcdDir 

func (spm *KubeStaticPodPathManager) BackupEtcdDir() string

BackupEtcdDir should point to the backup directory used for backuping manifests during the transition

func (*KubeStaticPodPathManager) BackupManifestDir 

func (spm *KubeStaticPodPathManager) BackupManifestDir() string

BackupManifestDir should point to the backup directory used for backuping manifests during the transition

func (*KubeStaticPodPathManager) BackupManifestPath 

func (spm *KubeStaticPodPathManager) BackupManifestPath(component string) string

BackupManifestPath gets the file path for the component in the backup directory used for backuping manifests during the transition

func (*KubeStaticPodPathManager) CleanupDirs 

func (spm *KubeStaticPodPathManager) CleanupDirs() error

CleanupDirs cleans up all temporary directories except those the user has requested to keep around

func (*KubeStaticPodPathManager) MoveFile 

func (spm *KubeStaticPodPathManager) MoveFile(oldPath, newPath string) error

MoveFile should move a file from oldPath to newPath

func (*KubeStaticPodPathManager) RealManifestDir 

func (spm *KubeStaticPodPathManager) RealManifestDir() string

RealManifestDir should point to the static pod manifest directory used by the kubelet

func (*KubeStaticPodPathManager) RealManifestPath 

func (spm *KubeStaticPodPathManager) RealManifestPath(component string) string

RealManifestPath gets the file path for the component in the "real" static pod manifest directory used by the kubelet

func (*KubeStaticPodPathManager) TempManifestDir 

func (spm *KubeStaticPodPathManager) TempManifestDir() string

TempManifestDir should point to the temporary directory created for generating new manifests for the upgrade

func (*KubeStaticPodPathManager) TempManifestPath 

func (spm *KubeStaticPodPathManager) TempManifestPath(component string) string

TempManifestPath gets the file path for the component in the temporary directory created for generating new manifests for the upgrade

type KubeVersionGetter 

type KubeVersionGetter struct {
	// contains filtered or unexported fields
}

KubeVersionGetter handles the version-fetching mechanism from external sources

func (*KubeVersionGetter) ClusterVersion 

func (g *KubeVersionGetter) ClusterVersion() (string, *versionutil.Version, error)

ClusterVersion gets API server version

func (*KubeVersionGetter) KubeadmVersion 

func (g *KubeVersionGetter) KubeadmVersion() (string, *versionutil.Version, error)

KubeadmVersion gets kubeadm version

func (*KubeVersionGetter) KubeletVersions 

func (g *KubeVersionGetter) KubeletVersions() (map[string]uint16, error)

KubeletVersions gets the versions of the kubelets in the cluster

func (*KubeVersionGetter) VersionFromCILabel 

func (g *KubeVersionGetter) VersionFromCILabel(ciVersionLabel, description string) (string, *versionutil.Version, error)

VersionFromCILabel resolves a version label like "latest" or "stable" to an actual version using the public Kubernetes CI uploads

type OfflineVersionGetter 

type OfflineVersionGetter struct {
	VersionGetter
	// contains filtered or unexported fields
}

OfflineVersionGetter will use the version provided or

func (*OfflineVersionGetter) VersionFromCILabel 

func (o *OfflineVersionGetter) VersionFromCILabel(ciVersionLabel, description string) (string, *versionutil.Version, error)

VersionFromCILabel will return the version that was passed into the struct

type Prepuller 

type Prepuller interface {
	CreateFunc(string) error
	WaitFunc(string)
	DeleteFunc(string) error
}

Prepuller defines an interface for performing a prepull operation in a create-wait-delete fashion in parallel

type StaticPodPathManager 

type StaticPodPathManager interface {
	// MoveFile should move a file from oldPath to newPath
	MoveFile(oldPath, newPath string) error
	// RealManifestPath gets the file path for the component in the "real" static pod manifest directory used by the kubelet
	RealManifestPath(component string) string
	// RealManifestDir should point to the static pod manifest directory used by the kubelet
	RealManifestDir() string
	// TempManifestPath gets the file path for the component in the temporary directory created for generating new manifests for the upgrade
	TempManifestPath(component string) string
	// TempManifestDir should point to the temporary directory created for generating new manifests for the upgrade
	TempManifestDir() string
	// BackupManifestPath gets the file path for the component in the backup directory used for backuping manifests during the transition
	BackupManifestPath(component string) string
	// BackupManifestDir should point to the backup directory used for backuping manifests during the transition
	BackupManifestDir() string
	// BackupEtcdDir should point to the backup directory used for backuping manifests during the transition
	BackupEtcdDir() string
	// CleanupDirs cleans up all temporary directories
	CleanupDirs() error
}

StaticPodPathManager is responsible for tracking the directories used in the static pod upgrade transition

func NewKubeStaticPodPathManager 

func NewKubeStaticPodPathManager(realDir, tempDir, backupDir, backupEtcdDir string, keepManifestDir, keepEtcdDir bool) StaticPodPathManager

NewKubeStaticPodPathManager creates a new instance of KubeStaticPodPathManager

func NewKubeStaticPodPathManagerUsingTempDirs 

func NewKubeStaticPodPathManagerUsingTempDirs(realManifestDir string, saveManifestsDir, saveEtcdDir bool) (StaticPodPathManager, error)

NewKubeStaticPodPathManagerUsingTempDirs creates a new instance of KubeStaticPodPathManager with temporary directories backing it

type Upgrade 

type Upgrade struct {
	Description string
	Before      ClusterState
	After       ClusterState
}

Upgrade defines an upgrade possibility to upgrade from a current version to a new one

func GetAvailableUpgrades 

func GetAvailableUpgrades(versionGetterImpl VersionGetter, experimentalUpgradesAllowed, rcUpgradesAllowed bool, etcdClient etcdutil.ClusterInterrogator, dnsType kubeadmapi.DNSAddOnType, client clientset.Interface) ([]Upgrade, error)

GetAvailableUpgrades fetches all versions from the specified VersionGetter and computes which kinds of upgrades can be performed

func (*Upgrade) CanUpgradeEtcd 

func (u *Upgrade) CanUpgradeEtcd() bool

CanUpgradeEtcd returns whether an upgrade of etcd is possible

func (*Upgrade) CanUpgradeKubelets 

func (u *Upgrade) CanUpgradeKubelets() bool

CanUpgradeKubelets returns whether an upgrade of any kubelet in the cluster is possible

type VersionGetter 

type VersionGetter interface {
	// ClusterVersion should return the version of the cluster i.e. the API Server version
	ClusterVersion() (string, *versionutil.Version, error)
	// KubeadmVersion should return the version of the kubeadm CLI
	KubeadmVersion() (string, *versionutil.Version, error)
	// VersionFromCILabel should resolve CI labels like `latest`, `stable`, `stable-1.8`, etc. to real versions
	VersionFromCILabel(string, string) (string, *versionutil.Version, error)
	// KubeletVersions should return a map with a version and a number that describes how many kubelets there are for that version
	KubeletVersions() (map[string]uint16, error)
}

VersionGetter defines an interface for fetching different versions. Easy to implement a fake variant of this interface for unit testing

func NewKubeVersionGetter 

func NewKubeVersionGetter(client clientset.Interface, writer io.Writer) VersionGetter

NewKubeVersionGetter returns a new instance of KubeVersionGetter

func NewOfflineVersionGetter 

func NewOfflineVersionGetter(versionGetter VersionGetter, version string) VersionGetter

NewOfflineVersionGetter wraps a VersionGetter and skips online communication if default information is supplied. Version can be "" and the behavior will be identical to the versionGetter passed in.

type VersionSkewPolicyErrors 

type VersionSkewPolicyErrors struct {
	Mandatory []error
	Skippable []error
}

VersionSkewPolicyErrors describes version skew errors that might be seen during the validation process in EnforceVersionPolicies

func EnforceVersionPolicies 

func EnforceVersionPolicies(versionGetter VersionGetter, newK8sVersionStr string, newK8sVersion *version.Version, allowExperimentalUpgrades, allowRCUpgrades bool) *VersionSkewPolicyErrors

EnforceVersionPolicies enforces that the proposed new version is compatible with all the different version skew policies

Source Files

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