scyllaclient

package
v1.4.0 Latest Latest
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 Go to latest Published: Jul 28, 2021 License: Apache-2.0 Imports: 33 Imported by: 1

Documentation

Index

Constants

View Source 
const (
	LocalStrategy           = "org.apache.cassandra.locator.LocalStrategy"
	SimpleStrategy          = "org.apache.cassandra.locator.SimpleStrategy"
	NetworkTopologyStrategy = "org.apache.cassandra.locator.NetworkTopologyStrategy"
)

Replication strategies

View Source 
const (
	Murmur3Partitioner = "org.apache.cassandra.dht.Murmur3Partitioner"
)

Partitioners

Variables

View Source 
var (
	// ErrTimeout is returned when request times out.
	ErrTimeout = errors.New("timeout")
)

Functions

func DefaultTransport added in v0.1.6 

func DefaultTransport() *http.Transport

func Interactive added in v0.1.6 

func Interactive(ctx context.Context) context.Context

Interactive context means that it should be processed fast without too much useless waiting.

func StatusCodeOf added in v0.1.6 

func StatusCodeOf(err error) int

StatusCodeOf returns HTTP status code carried by the error or it's cause. If not status can be found it returns 0.

Types

type BackoffConfig added in v0.1.6 

type BackoffConfig struct {
	WaitMin    time.Duration
	WaitMax    time.Duration
	MaxRetries uint64
	Multiplier float64
	Jitter     float64
}

BackoffConfig specifies request exponential backoff parameters.

type Client 

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

func NewClient added in v0.1.6 

func NewClient(config Config, logger log.Logger) (*Client, error)

func (*Client) CheckHostsConnectivity added in v0.2.4 

func (c *Client) CheckHostsConnectivity(ctx context.Context, hosts []string) []error

CheckHostsConnectivity returns a slice of errors, error at position i corresponds to host at position i.

func (*Client) ClosestDC added in v0.2.4 

func (c *Client) ClosestDC(ctx context.Context, dcs map[string][]string) ([]string, error)

ClosestDC takes output of Datacenters, a map from DC to it's hosts and returns DCs sorted by speed the hosts respond. It's determined by the lowest latency over 3 Ping() invocations across random selection of hosts for each DC.

func (*Client) Decommission added in v0.1.6 

func (c *Client) Decommission(ctx context.Context, host string) error

func (*Client) DeleteSnapshot added in v1.0.0 

func (c *Client) DeleteSnapshot(ctx context.Context, host, tag string) error

DeleteSnapshot removes a snapshot with a given tag.

func (*Client) Drain added in v1.0.0 

func (c *Client) Drain(ctx context.Context, host string) error

Drain makes node unavailable for writes, flushes memtables and replays commitlog

func (*Client) HasSchemaAgreement added in v1.3.0 

func (c *Client) HasSchemaAgreement(ctx context.Context) (bool, error)

func (*Client) HostDatacenter 

func (c *Client) HostDatacenter(ctx context.Context, host string) (dc string, err error)

HostDatacenter looks up the datacenter that the given host belongs to.

func (*Client) IsNativeTransportEnabled added in v1.0.0 

func (c *Client) IsNativeTransportEnabled(ctx context.Context, host string) (bool, error)

func (*Client) Keyspaces added in v1.0.0 

func (c *Client) Keyspaces(ctx context.Context) ([]string, error)

Keyspaces return a list of all the keyspaces.

func (*Client) OperationMode added in v0.1.6 

func (c *Client) OperationMode(ctx context.Context, host string) (OperationalMode, error)

func (*Client) Ping added in v0.2.4 

func (c *Client) Ping(ctx context.Context, host string) (time.Duration, error)

Ping checks if host is available using HTTP ping and returns RTT. Ping requests are not retried, use this function with caution.

func (*Client) PingN added in v0.2.4 

func (c *Client) PingN(ctx context.Context, host string, n int, timeout time.Duration) (time.Duration, error)

PingN does "n" amount of pings towards the host and returns average RTT across all results. Pings are tried sequentially and if any of the pings fail function will return an error.

func (*Client) ScyllaVersion added in v1.0.0 

func (c *Client) ScyllaVersion(ctx context.Context) (string, error)

func (*Client) Snapshots added in v1.0.0 

func (c *Client) Snapshots(ctx context.Context, host string) ([]string, error)

Snapshots lists available snapshots.

func (*Client) Status 

func (c *Client) Status(ctx context.Context, host string) (NodeStatusInfoSlice, error)

func (*Client) TakeSnapshot added in v1.0.0 

func (c *Client) TakeSnapshot(ctx context.Context, host, tag, keyspace string, tables ...string) error

TakeSnapshot flushes and takes a snapshot of a keyspace. Multiple keyspaces may have the same tag.

type CommandStatus 

type CommandStatus string

CommandStatus specifies a result of a command 

const (
	CommandRunning    CommandStatus = "RUNNING"
	CommandSuccessful CommandStatus = "SUCCESSFUL"
	CommandFailed     CommandStatus = "FAILED"
)

Command statuses

type Config added in v0.1.6 

type Config struct {
	// Hosts specifies all the cluster hosts that for a pool of hosts for the
	// client.
	Hosts []string
	// Port specifies the default Scylla Manager agent port.
	Port string
	// Transport scheme HTTP or HTTPS.
	Scheme string
	// AuthToken specifies the authentication token.
	AuthToken string `yaml:"auth_token"`
	// Timeout specifies time to complete a single request to Scylla REST API
	// possibly including opening a TCP connection.
	Timeout time.Duration `yaml:"timeout"`
	// PoolDecayDuration specifies size of time window to measure average
	// request time in Epsilon-Greedy host pool.
	Backoff BackoffConfig
	// InteractiveBackoff specifies backoff for interactive requests i.e.
	// originating from API / sctool.
	InteractiveBackoff BackoffConfig
	// How many seconds to wait for the job to finish before returning
	// the info response.
	LongPollingSeconds int64
	PoolDecayDuration  time.Duration
	// Transport allows for setting a custom round tripper to send HTTP
	// requests over not standard connections i.e. over SSH tunnel.
	Transport http.RoundTripper
}

Config specifies the Client configuration.

func DefaultConfig added in v0.1.6 

func DefaultConfig(authToken string, hosts ...string) Config

DefaultConfig returns a Config initialized with default values.

func (Config) Validate added in v0.1.6 

func (c Config) Validate() error

Validate checks if all the fields are properly set.

type NodeState 

type NodeState string

NodeState represents nodetool State=Normal/Leaving/Joining/Moving 

const (
	NodeStateNormal  NodeState = ""
	NodeStateLeaving NodeState = "LEAVING"
	NodeStateJoining NodeState = "JOINING"
	NodeStateMoving  NodeState = "MOVING"
)

NodeState enumeration

func (NodeState) String 

func (s NodeState) String() string

type NodeStatus 

type NodeStatus bool

NodeStatus represents nodetool Status=Up/Down. 

const (
	NodeStatusUp   NodeStatus = true
	NodeStatusDown NodeStatus = false
)

NodeStatus enumeration

func (NodeStatus) String 

func (s NodeStatus) String() string

type NodeStatusInfo 

type NodeStatusInfo struct {
	Datacenter string
	HostID     string
	Addr       string
	Status     NodeStatus
	State      NodeState
}

NodeStatusInfo represents a nodetool status line.

func (NodeStatusInfo) IsUN 

func (s NodeStatusInfo) IsUN() bool

IsUN returns true if host is Up and NORMAL meaning it's a fully functional live node.

func (NodeStatusInfo) String added in v0.1.6 

func (s NodeStatusInfo) String() string

type NodeStatusInfoSlice 

type NodeStatusInfoSlice []NodeStatusInfo

NodeStatusInfoSlice adds functionality to Status response.

func (NodeStatusInfoSlice) Datacenter 

func (s NodeStatusInfoSlice) Datacenter(dcs []string) NodeStatusInfoSlice

Datacenter resturns sub slice containing only nodes from given datacenters.

func (NodeStatusInfoSlice) DownHosts 

func (s NodeStatusInfoSlice) DownHosts() []string

DownHosts returns slice of address of nodes that are down.

func (NodeStatusInfoSlice) Hosts 

func (s NodeStatusInfoSlice) Hosts() []string

Hosts returns slice of address of all nodes.

func (NodeStatusInfoSlice) LiveHosts 

func (s NodeStatusInfoSlice) LiveHosts() []string

LiveHosts returns slice of address of nodes in UN state.

type OperationalMode added in v0.1.6 

type OperationalMode string
const (
	OperationalModeClient          OperationalMode = "CLIENT"
	OperationalModeDecommissioned  OperationalMode = "DECOMMISSIONED"
	OperationalModeDecommissioning OperationalMode = "DECOMMISSIONING"
	OperationalModeJoining         OperationalMode = "JOINING"
	OperationalModeLeaving         OperationalMode = "LEAVING"
	OperationalModeNormal          OperationalMode = "NORMAL"
	OperationalModeDrained         OperationalMode = "DRAINED"
	OperationalModeDraining        OperationalMode = "DRAINING"
	OperationalModeUnknown         OperationalMode = "UNKNOWN"
)

func (OperationalMode) IsDecommissioned added in v1.0.0 

func (o OperationalMode) IsDecommissioned() bool

func (OperationalMode) IsDecommissioning added in v1.0.0 

func (o OperationalMode) IsDecommissioning() bool

func (OperationalMode) IsDrained added in v1.0.0 

func (o OperationalMode) IsDrained() bool

func (OperationalMode) IsDraining added in v1.0.0 

func (o OperationalMode) IsDraining() bool

func (OperationalMode) IsJoining added in v1.0.0 

func (o OperationalMode) IsJoining() bool

func (OperationalMode) IsLeaving added in v1.0.0 

func (o OperationalMode) IsLeaving() bool

func (OperationalMode) IsNormal added in v1.0.0 

func (o OperationalMode) IsNormal() bool

func (OperationalMode) String added in v0.1.6 

func (o OperationalMode) String() string

type ReplicationStrategy 

type ReplicationStrategy string

ReplicationStrategy specifies type of a keyspace replication strategy.

type Ring 

type Ring struct {
	Tokens      []TokenRange
	HostDC      map[string]string
	Replication ReplicationStrategy
}

Ring describes token ring of a keyspace.

func (Ring) Datacenters 

func (r Ring) Datacenters() []string

Datacenters returs a list of datacenters the keyspace is replicated in.

type ScyllaFeatures 

type ScyllaFeatures struct {
	RowLevelRepair bool
}

ScyllaFeatures specifies features supported by the Scylla version.

type TokenRange 

type TokenRange struct {
	StartToken int64
	EndToken   int64
	Replicas   []string
}

TokenRange describes replicas of a token (range).

type Unit 

type Unit struct {
	Keyspace string
	Tables   []string
}

Unit describes keyspace and some tables in that keyspace.

Source Files

View all Source files

Directories

Path Synopsis
internal
agent/client
agent/client/operations
agent/models
scylla/client
scylla/client/operations
scylla/models
scylla_v2/client
scylla_v2/client/config
scylla_v2/models

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