etcd

Documentation

Index

• func CheckConfigurationIsHA(cfg *kubeadmapi.Etcd) bool
• func PodManifestsHaveTLS(ManifestDir string) (bool, error)
• type Client
  • func New(endpoints []string, ca, cert, key string) (*Client, error)
  • func NewFromCluster(client clientset.Interface, certificatesDir string) (*Client, error)
  • func NewFromStaticPod(endpoints []string, manifestDir string, certificatesDir string) (*Client, error)
  • func (c Client) AddMember(name string, peerAddrs string) ([]Member, error)
  • func (c Client) ClusterAvailable() (bool, error)
  • func (c Client) GetClusterStatus() (map[string]*clientv3.StatusResponse, error)
  • func (c Client) GetClusterVersions() (map[string]string, error)
  • func (c Client) GetVersion() (string, error)
  • func (c Client) HasTLS() bool
  • func (c Client) Sync() error
  • func (c Client) WaitForClusterAvailable(delay time.Duration, retries int, retryInterval time.Duration) (bool, error)
• type ClusterInterrogator
• type Member

Functions

func CheckConfigurationIsHA

func CheckConfigurationIsHA(cfg *kubeadmapi.Etcd) bool

CheckConfigurationIsHA returns true if the given InitConfiguration etcd block appears to be an HA configuration.

func PodManifestsHaveTLS

func PodManifestsHaveTLS(ManifestDir string) (bool, error)

PodManifestsHaveTLS reads the etcd staticpod manifest from disk and returns false if the TLS flags are missing from the command list. If all the flags are present it returns true.

Types

type Client

type Client struct {
	Endpoints []string
	TLS       *tls.Config
}

Client provides connection parameters for an etcd cluster

func New

func New(endpoints []string, ca, cert, key string) (*Client, error)

New creates a new EtcdCluster client

func NewFromCluster

func NewFromCluster(client clientset.Interface, certificatesDir string) (*Client, error)

NewFromCluster creates an etcd client for the the etcd endpoints defined in the ClusterStatus value stored in the kubeadm-config ConfigMap in kube-system namespace. Once created, the client synchronizes client's endpoints with the known endpoints from the etcd membership API (reality check).

func NewFromStaticPod

func NewFromStaticPod(endpoints []string, manifestDir string, certificatesDir string) (*Client, error)

NewFromStaticPod creates a GenericClient from the given endpoints, manifestDir, and certificatesDir

func (Client) AddMember

func (c Client) AddMember(name string, peerAddrs string) ([]Member, error)

AddMember notifies an existing etcd cluster that a new member is joining

func (Client) ClusterAvailable

func (c Client) ClusterAvailable() (bool, error)

ClusterAvailable returns true if the cluster status indicates the cluster is available.

func (Client) GetClusterStatus

func (c Client) GetClusterStatus() (map[string]*clientv3.StatusResponse, error)

GetClusterStatus returns nil for status Up or error for status Down

func (Client) GetClusterVersions

func (c Client) GetClusterVersions() (map[string]string, error)

GetClusterVersions returns a map of the endpoints and their associated versions

func (Client) GetVersion

func (c Client) GetVersion() (string, error)

GetVersion returns the etcd version of the cluster. An error is returned if the version of all endpoints do not match

func (Client) HasTLS

func (c Client) HasTLS() bool

HasTLS returns true if etcd is configured for TLS

func (Client) Sync

func (c Client) Sync() error

Sync synchronizes client's endpoints with the known endpoints from the etcd membership.

func (Client) WaitForClusterAvailable

func (c Client) WaitForClusterAvailable(delay time.Duration, retries int, retryInterval time.Duration) (bool, error)

WaitForClusterAvailable returns true if all endpoints in the cluster are available after an initial delay and retry attempts, an error is returned otherwise

type ClusterInterrogator

type ClusterInterrogator interface {
	ClusterAvailable() (bool, error)
	GetClusterStatus() (map[string]*clientv3.StatusResponse, error)
	GetClusterVersions() (map[string]string, error)
	GetVersion() (string, error)
	HasTLS() bool
	WaitForClusterAvailable(delay time.Duration, retries int, retryInterval time.Duration) (bool, error)
	Sync() error
	AddMember(name string, peerAddrs string) ([]Member, error)
}

ClusterInterrogator is an interface to get etcd cluster related information

type Member

type Member struct {
	Name    string
	PeerURL string
}

Member struct defines an etcd member; it is used for avoiding to spread github.com/coreos/etcd dependency across kubeadm codebase