etcd

package
v0.0.0-...-1ba95a4 Latest Latest
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 Go to latest Published: Nov 21, 2024 License: Apache-2.0 Imports: 37 Imported by: 3

Documentation

Index

Constants

View Source 
const (
	EtcdPut    = "Put"
	EtcdGet    = "Get"
	EtcdTxn    = "Txn"
	EtcdDel    = "Del"
	EtcdGrant  = "Grant"
	EtcdRevoke = "Revoke"
)

etcd operation names

View Source 
const (

	// ChangefeedInfoKey is the key path for changefeed info
	ChangefeedInfoKey = "/changefeed/info"
	// ChangefeedStatusKey is the key path for changefeed status
	ChangefeedStatusKey = "/changefeed/status"

	// DeletionCounterKey is the key path for the counter of deleted keys
	DeletionCounterKey = metaPrefix + "/meta/ticdc-delete-etcd-key-count"

	// DefaultClusterAndNamespacePrefix is the default prefix of changefeed data
	DefaultClusterAndNamespacePrefix = "/tidb/cdc/default/default"
	// DefaultClusterAndMetaPrefix is the default prefix of cluster meta
	DefaultClusterAndMetaPrefix = "/tidb/cdc/default" + metaPrefix
)
View Source 
const DefaultCDCClusterID = "default"

DefaultCDCClusterID is the default value of cdc cluster id

Variables

View Source 
var (

	// TxnEmptyOpsElse is a no-op operation.
	TxnEmptyOpsElse = []clientV3.Op{}
)

Functions

func BaseKey 

func BaseKey(clusterID string) string

BaseKey is the common prefix of the keys with cluster id in CDC

Note that tidb-dashboard depends on this prefix to filter out TiCDC keys. Ref: https://github.com/pingcap/tidb-dashboard/blob/1f39ee09c5352adbf23af8ec7e15020147ef9ca4/pkg/utils/topology/ticdc.go#L22

func CaptureInfoKeyPrefix 

func CaptureInfoKeyPrefix(clusterID string) string

CaptureInfoKeyPrefix is the capture info path that is saved to etcd

func CaptureOwnerKey 

func CaptureOwnerKey(clusterID string) string

CaptureOwnerKey is the capture owner path that is saved to etcd

func ChangefeedStatusKeyPrefix 

func ChangefeedStatusKeyPrefix(clusterID, namespace string) string

ChangefeedStatusKeyPrefix is the prefix of changefeed status keys

func CreateRawEtcdClient 

func CreateRawEtcdClient(securityConf *security.Credential, grpcDialOption grpc.DialOption, endpoints ...string) (*clientv3.Client, error)

CreateRawEtcdClient creates etcd v3 client with detecting endpoints. It will check the health of endpoints periodically, and update endpoints if needed.

func GcServiceIDForTest 

func GcServiceIDForTest() string

GcServiceIDForTest returns the gc service ID for tests

func GetEtcdKeyCaptureInfo 

func GetEtcdKeyCaptureInfo(clusterID, id string) string

GetEtcdKeyCaptureInfo returns the key of a capture info

func GetEtcdKeyChangeFeedInfo 

func GetEtcdKeyChangeFeedInfo(clusterID string, changefeedID model.ChangeFeedID) string

GetEtcdKeyChangeFeedInfo returns the key of a changefeed config

func GetEtcdKeyChangeFeedList 

func GetEtcdKeyChangeFeedList(clusterID, namespace string) string

GetEtcdKeyChangeFeedList returns the prefix key of all changefeed config

func GetEtcdKeyJob 

func GetEtcdKeyJob(clusterID string, changeFeedID model.ChangeFeedID) string

GetEtcdKeyJob returns the key for a job status

func GetEtcdKeyTaskPosition 

func GetEtcdKeyTaskPosition(clusterID string,
	changefeedID model.ChangeFeedID,
	captureID string,
) string

GetEtcdKeyTaskPosition returns the key of a task position

func InitMetrics 

func InitMetrics(registry *prometheus.Registry)

InitMetrics registers the etcd request counter.

func IsHealthy 

func IsHealthy(ctx context.Context, client *clientv3.Client) bool

IsHealthy checks if the etcd is healthy.

func MigrateBackupKey 

func MigrateBackupKey(version int, backupKey string) string

MigrateBackupKey is the key of backup data during a migration.

func NamespacedPrefix 

func NamespacedPrefix(clusterID, namespace string) string

NamespacedPrefix returns the etcd prefix of changefeed data

func SetupEmbedEtcd 

func SetupEmbedEtcd(dir string) (clientURL *url.URL, e *embed.Etcd, err error)

SetupEmbedEtcd starts an embed etcd server

func TaskPositionKeyPrefix 

func TaskPositionKeyPrefix(clusterID, namespace string) string

TaskPositionKeyPrefix is the prefix of task position keys

Types

type CDCEtcdClient 

type CDCEtcdClient interface {
	OwnerCaptureInfoClient

	GetClusterID() string

	GetEtcdClient() *Client

	GetAllCDCInfo(ctx context.Context) ([]*mvccpb.KeyValue, error)

	GetChangeFeedInfo(ctx context.Context,
		id model.ChangeFeedID,
	) (*model.ChangeFeedInfo, error)

	GetAllChangeFeedInfo(ctx context.Context) (
		map[model.ChangeFeedID]*model.ChangeFeedInfo, error,
	)

	GetChangeFeedStatus(ctx context.Context,
		id model.ChangeFeedID,
	) (*model.ChangeFeedStatus, int64, error)

	GetUpstreamInfo(ctx context.Context,
		upstreamID model.UpstreamID,
		namespace string,
	) (*model.UpstreamInfo, error)

	GetGCServiceID() string

	GetEnsureGCServiceID(tag string) string

	SaveChangeFeedInfo(ctx context.Context,
		info *model.ChangeFeedInfo,
		changeFeedID model.ChangeFeedID,
	) error

	CreateChangefeedInfo(context.Context,
		*model.UpstreamInfo,
		*model.ChangeFeedInfo,
	) error

	UpdateChangefeedAndUpstream(ctx context.Context,
		upstreamInfo *model.UpstreamInfo,
		changeFeedInfo *model.ChangeFeedInfo,
	) error

	PutCaptureInfo(context.Context, *model.CaptureInfo, clientv3.LeaseID) error

	DeleteCaptureInfo(context.Context, model.CaptureID) error

	CheckMultipleCDCClusterExist(ctx context.Context) error
}

CDCEtcdClient extracts CDCEtcdClients's method used for apiv2.

type CDCEtcdClientImpl 

type CDCEtcdClientImpl struct {
	Client    *Client
	ClusterID string
	// contains filtered or unexported fields
}

CDCEtcdClientImpl is a wrap of etcd client

func NewCDCEtcdClient 

func NewCDCEtcdClient(ctx context.Context,
	cli *clientv3.Client,
	clusterID string,
) (*CDCEtcdClientImpl, error)

NewCDCEtcdClient returns a new CDCEtcdClient

func (*CDCEtcdClientImpl) CheckMultipleCDCClusterExist 

func (c *CDCEtcdClientImpl) CheckMultipleCDCClusterExist(ctx context.Context) error

CheckMultipleCDCClusterExist checks if other cdc clusters exists, and returns an error is so, and user should use --server instead

func (*CDCEtcdClientImpl) ClearAllCDCInfo 

func (c *CDCEtcdClientImpl) ClearAllCDCInfo(ctx context.Context) error

ClearAllCDCInfo delete all keys created by CDC

func (*CDCEtcdClientImpl) Close 

func (c *CDCEtcdClientImpl) Close() error

Close releases resources in CDCEtcdClient

func (*CDCEtcdClientImpl) CreateChangefeedInfo 

func (c *CDCEtcdClientImpl) CreateChangefeedInfo(
	ctx context.Context, upstreamInfo *model.UpstreamInfo, info *model.ChangeFeedInfo,
) error

CreateChangefeedInfo creates a change feed info into etcd and fails if it is already exists.

func (*CDCEtcdClientImpl) DeleteCaptureInfo 

func (c *CDCEtcdClientImpl) DeleteCaptureInfo(ctx context.Context, captureID string) error

DeleteCaptureInfo delete all capture related info from etcd.

func (*CDCEtcdClientImpl) DeleteChangeFeedInfo 

func (c *CDCEtcdClientImpl) DeleteChangeFeedInfo(ctx context.Context,
	id model.ChangeFeedID,
) error

DeleteChangeFeedInfo deletes a changefeed config from etcd

func (*CDCEtcdClientImpl) GetAllCDCInfo 

func (c *CDCEtcdClientImpl) GetAllCDCInfo(ctx context.Context) ([]*mvccpb.KeyValue, error)

GetAllCDCInfo get all keys created by CDC

func (*CDCEtcdClientImpl) GetAllChangeFeedInfo 

func (c *CDCEtcdClientImpl) GetAllChangeFeedInfo(ctx context.Context) (
	map[model.ChangeFeedID]*model.ChangeFeedInfo, error,
)

GetAllChangeFeedInfo queries all changefeed information

func (*CDCEtcdClientImpl) GetCaptureInfo 

func (c *CDCEtcdClientImpl) GetCaptureInfo(
	ctx context.Context, id string,
) (info *model.CaptureInfo, err error)

GetCaptureInfo get capture info from etcd. return ErrCaptureNotExist if the capture not exists.

func (*CDCEtcdClientImpl) GetCaptureLeases 

func (c *CDCEtcdClientImpl) GetCaptureLeases(ctx context.Context) (map[string]int64, error)

GetCaptureLeases returns a map mapping from capture ID to its lease

func (*CDCEtcdClientImpl) GetCaptures 

func (c *CDCEtcdClientImpl) GetCaptures(ctx context.Context) (int64, []*model.CaptureInfo, error)

GetCaptures returns kv revision and CaptureInfo list

func (*CDCEtcdClientImpl) GetChangeFeedInfo 

func (c *CDCEtcdClientImpl) GetChangeFeedInfo(ctx context.Context,
	id model.ChangeFeedID,
) (*model.ChangeFeedInfo, error)

GetChangeFeedInfo queries the config of a given changefeed

func (*CDCEtcdClientImpl) GetChangeFeedStatus 

func (c *CDCEtcdClientImpl) GetChangeFeedStatus(ctx context.Context,
	id model.ChangeFeedID,
) (*model.ChangeFeedStatus, int64, error)

GetChangeFeedStatus queries the checkpointTs and resovledTs of a given changefeed

func (*CDCEtcdClientImpl) GetChangeFeeds 

func (c *CDCEtcdClientImpl) GetChangeFeeds(ctx context.Context) (
	int64,
	map[model.ChangeFeedID]*mvccpb.KeyValue, error,
)

GetChangeFeeds returns kv revision and a map mapping from changefeedID to changefeed detail mvccpb.KeyValue

func (*CDCEtcdClientImpl) GetClusterID 

func (c *CDCEtcdClientImpl) GetClusterID() string

GetClusterID gets CDC cluster ID.

func (*CDCEtcdClientImpl) GetEnsureGCServiceID 

func (c *CDCEtcdClientImpl) GetEnsureGCServiceID(tag string) string

GetEnsureGCServiceID return the prefix for the gc service id when changefeed is creating

func (*CDCEtcdClientImpl) GetEtcdClient 

func (c *CDCEtcdClientImpl) GetEtcdClient() *Client

GetEtcdClient gets Client.

func (*CDCEtcdClientImpl) GetGCServiceID 

func (c *CDCEtcdClientImpl) GetGCServiceID() string

GetGCServiceID returns the cdc gc service ID

func (*CDCEtcdClientImpl) GetOwnerID 

func (c *CDCEtcdClientImpl) GetOwnerID(ctx context.Context) (string, error)

GetOwnerID returns the owner id by querying etcd

func (*CDCEtcdClientImpl) GetOwnerRevision 

func (c *CDCEtcdClientImpl) GetOwnerRevision(
	ctx context.Context, captureID string,
) (rev int64, err error)

GetOwnerRevision gets the Etcd revision for the elected owner.

func (*CDCEtcdClientImpl) GetUpstreamInfo 

func (c *CDCEtcdClientImpl) GetUpstreamInfo(ctx context.Context,
	upstreamID model.UpstreamID,
	namespace string,
) (*model.UpstreamInfo, error)

GetUpstreamInfo get a upstreamInfo from etcd server

func (*CDCEtcdClientImpl) PutCaptureInfo 

func (c *CDCEtcdClientImpl) PutCaptureInfo(
	ctx context.Context, info *model.CaptureInfo, leaseID clientv3.LeaseID,
) error

PutCaptureInfo put capture info into etcd, this happens when the capture starts.

func (*CDCEtcdClientImpl) RevokeAllLeases 

func (c *CDCEtcdClientImpl) RevokeAllLeases(ctx context.Context, leases map[string]int64) error

RevokeAllLeases revokes all leases passed from parameter

func (*CDCEtcdClientImpl) SaveChangeFeedInfo 

func (c *CDCEtcdClientImpl) SaveChangeFeedInfo(ctx context.Context,
	info *model.ChangeFeedInfo,
	changeFeedID model.ChangeFeedID,
) error

SaveChangeFeedInfo stores change feed info into etcd TODO: this should be called from outer system, such as from a TiDB client

func (*CDCEtcdClientImpl) UpdateChangefeedAndUpstream 

func (c *CDCEtcdClientImpl) UpdateChangefeedAndUpstream(
	ctx context.Context, upstreamInfo *model.UpstreamInfo, changeFeedInfo *model.ChangeFeedInfo,
) error

UpdateChangefeedAndUpstream updates the changefeed's info and its upstream info into etcd

type CDCKey 

type CDCKey struct {
	Tp           CDCKeyType
	ChangefeedID model.ChangeFeedID
	CaptureID    string
	OwnerLeaseID string
	ClusterID    string
	UpstreamID   model.UpstreamID
	Namespace    string
}

CDCKey represents an etcd key which is defined by TiCDC 

 Usage:
 we can parse a raw etcd key:
 ```
 	k := new(CDCKey)
 	rawKey := "/tidb/cdc/changefeed/info/test/changefeed"
	err := k.Parse(rawKey)
 	c.Assert(k, check.DeepEquals, &CDCKey{
			Tp:           CDCKeyTypeChangefeedInfo,
			ChangefeedID: "test/changefeed",
	})
 ```

 and we can generate a raw key from CDCKey
 ```
 	k := &CDCKey{
			Tp:           CDCKeyTypeChangefeedInfo,
			ChangefeedID: "test/changefeed",
	}
 	c.Assert(k.String(), check.Equals, "/tidb/cdc/changefeed/info/test/changefeed")
 ```

func (*CDCKey) Parse 

func (k *CDCKey) Parse(clusterID, key string) error

Parse parses the given etcd key

func (*CDCKey) String 

func (k *CDCKey) String() string

type CDCKeyType 

type CDCKeyType = int

CDCKeyType is the type of etcd key 

const (
	CDCKeyTypeUnknown CDCKeyType = iota
	CDCKeyTypeOwner
	CDCKeyTypeCapture
	CDCKeyTypeChangefeedInfo
	CDCKeyTypeChangeFeedStatus
	CDCKeyTypeTaskPosition
	CDCKeyTypeMetaVersion
	CDCKeyTypeUpStream
)

the types of etcd key

type Client 

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

Client is a simple wrapper that adds retry to etcd RPC

func Wrap 

func Wrap(cli *clientV3.Client, metrics map[string]prometheus.Counter) *Client

Wrap warps a clientV3.Client that provides etcd APIs required by TiCDC.

func (*Client) Delete 

func (c *Client) Delete(
	ctx context.Context, key string, opts ...clientV3.OpOption,
) (resp *clientV3.DeleteResponse, err error)

Delete delegates request to clientV3.KV.Delete

func (*Client) Get 

func (c *Client) Get(
	ctx context.Context, key string, opts ...clientV3.OpOption,
) (resp *clientV3.GetResponse, err error)

Get delegates request to clientV3.KV.Get

func (*Client) Grant 

func (c *Client) Grant(
	ctx context.Context, ttl int64,
) (resp *clientV3.LeaseGrantResponse, err error)

Grant delegates request to clientV3.Lease.Grant

func (*Client) Put 

func (c *Client) Put(
	ctx context.Context, key, val string, opts ...clientV3.OpOption,
) (resp *clientV3.PutResponse, err error)

Put delegates request to clientV3.KV.Put

func (*Client) RequestProgress 

func (c *Client) RequestProgress(ctx context.Context) error

RequestProgress requests a progress notify response be sent in all watch channels.

func (*Client) Revoke 

func (c *Client) Revoke(
	ctx context.Context, id clientV3.LeaseID,
) (resp *clientV3.LeaseRevokeResponse, err error)

Revoke delegates request to clientV3.Lease.Revoke

func (*Client) TimeToLive 

func (c *Client) TimeToLive(
	ctx context.Context, lease clientV3.LeaseID, opts ...clientV3.LeaseOption,
) (resp *clientV3.LeaseTimeToLiveResponse, err error)

TimeToLive delegates request to clientV3.Lease.TimeToLive

func (*Client) Txn 

func (c *Client) Txn(
	ctx context.Context, cmps []clientV3.Cmp, opsThen, opsElse []clientV3.Op,
) (resp *clientV3.TxnResponse, err error)

Txn delegates request to clientV3.KV.Txn. The error returned can only be a non-retryable error, such as context.Canceled, context.DeadlineExceeded, errors.ErrReachMaxTry.

func (*Client) Unwrap 

func (c *Client) Unwrap() *clientV3.Client

Unwrap returns a clientV3.Client

func (*Client) Watch 

func (c *Client) Watch(
	ctx context.Context, key string, role string, opts ...clientV3.OpOption,
) clientV3.WatchChan

Watch delegates request to clientV3.Watcher.Watch

func (*Client) WatchWithChan 

func (c *Client) WatchWithChan(
	ctx context.Context, outCh chan<- clientV3.WatchResponse,
	key string, role string, opts ...clientV3.OpOption,
)

WatchWithChan maintains a watchCh and sends all msg from the watchCh to outCh

type OwnerCaptureInfoClient 

type OwnerCaptureInfoClient interface {
	GetOwnerID(context.Context) (model.CaptureID, error)

	GetOwnerRevision(context.Context, model.CaptureID) (int64, error)

	GetCaptures(context.Context) (int64, []*model.CaptureInfo, error)
}

OwnerCaptureInfoClient is the sub interface of CDCEtcdClient that used for get owner capture information

type Tester 

type Tester struct {
	ClientURL *url.URL
	// contains filtered or unexported fields
}

Tester is for ut tests

func (*Tester) SetUpTest 

func (s *Tester) SetUpTest(t *testing.T)

SetUpTest setup etcd tester

func (*Tester) TearDownTest 

func (s *Tester) TearDownTest(t *testing.T)

TearDownTest teardown etcd

Source Files

View all Source files

Directories

Path Synopsis
Package mock_etcd is a generated GoMock package.
 Package mock_etcd is a generated GoMock package.

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