throttler

package
v0.19.3 Latest Latest
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Published: Apr 4, 2024 License: Apache-2.0 Imports: 18 Imported by: 0

Documentation

Index

Constants

View Source
const (
	DefaultQuery     = "select unix_timestamp(now(6))-max(ts/1000000000) as replication_lag from _vt.heartbeat"
	DefaultThreshold = 5 * time.Second
	ConfigTimeout    = 60 * time.Second
)

Variables

View Source
var DefaultConfig = &Config{
	Query:     DefaultQuery,
	Threshold: DefaultThreshold.Seconds(),
}

Functions

func EnableLagThrottlerAndWaitForStatus added in v0.17.0

func EnableLagThrottlerAndWaitForStatus(t *testing.T, clusterInstance *cluster.LocalProcessCluster, lag time.Duration)

EnableLagThrottlerAndWaitForStatus is a utility function to enable the throttler at the beginning of an endtoend test. The throttler is configued to use the standard replication lag metric. The function waits until the throttler is confirmed to be running on all tablets.

func ThrottleApp added in v0.18.0

func ThrottleApp(clusterInstance *cluster.LocalProcessCluster, throttlerApp throttlerapp.Name) (string, error)

ThrottleApp throttles given app name for the next hour

func ThrottleAppAndWaitUntilTabletsConfirm added in v0.18.0

func ThrottleAppAndWaitUntilTabletsConfirm(t *testing.T, clusterInstance *cluster.LocalProcessCluster, throttlerApp throttlerapp.Name) (string, error)

ThrottleAppAndWaitUntilTabletsConfirm

func UnthrottleApp added in v0.18.0

func UnthrottleApp(clusterInstance *cluster.LocalProcessCluster, throttlerApp throttlerapp.Name) (string, error)

ThrottleApp unthrottles given app name

func UnthrottleAppAndWaitUntilTabletsConfirm added in v0.18.0

func UnthrottleAppAndWaitUntilTabletsConfirm(t *testing.T, clusterInstance *cluster.LocalProcessCluster, throttlerApp throttlerapp.Name) (string, error)

UnthrottleAppAndWaitUntilTabletsConfirm

func UpdateThrottlerTopoConfig

func UpdateThrottlerTopoConfig(clusterInstance *cluster.LocalProcessCluster, enable bool, disable bool, threshold float64, metricsQuery string, appRule *topodatapb.ThrottledAppRule) (string, error)

UpdateThrottlerTopoConfig runs vtctlclient UpdateThrottlerConfig. This retries the command until it succeeds or times out as the SrvKeyspace record may not yet exist for a newly created Keyspace that is still initializing before it becomes serving.

func UpdateThrottlerTopoConfigRaw added in v0.17.0

func UpdateThrottlerTopoConfigRaw(vtctldProcess *cluster.VtctldClientProcess, keyspaceName string, enable bool, disable bool, threshold float64, metricsQuery string, appRule *topodatapb.ThrottledAppRule) (result string, err error)

UpdateThrottlerTopoConfig runs vtctlclient UpdateThrottlerConfig. This retries the command until it succeeds or times out as the SrvKeyspace record may not yet exist for a newly created Keyspace that is still initializing before it becomes serving.

func WaitForSrvKeyspace added in v0.18.0

func WaitForSrvKeyspace(clusterInstance *cluster.LocalProcessCluster, cell, keyspace string) error

WaitForSrvKeyspace waits until the given srvkeyspace entry is found in the given cell

func WaitForThrottledApp added in v0.18.0

func WaitForThrottledApp(t *testing.T, tablet *cluster.Vttablet, throttlerApp throttlerapp.Name, expectThrottled bool, timeout time.Duration)

WaitForThrottlerStatusEnabled waits for a tablet to report its throttler status as enabled/disabled and have the provided config (if any) until the specified timeout.

func WaitForThrottlerStatusEnabled

func WaitForThrottlerStatusEnabled(t *testing.T, tablet *cluster.Vttablet, enabled bool, config *Config, timeout time.Duration)

WaitForThrottlerStatusEnabled waits for a tablet to report its throttler status as enabled/disabled and have the provided config (if any) until the specified timeout.

func WaitForValidData

func WaitForValidData(t *testing.T, tablet *cluster.Vttablet, timeout time.Duration)

WaitForValidData waits for a tablet's checks to return a non 500 http response which indicates that it's not able to provide valid results. This is most commonly caused by the throttler still gathering the initial results for the given configuration.

func WaitUntilTabletsConfirmThrottledApp added in v0.18.0

func WaitUntilTabletsConfirmThrottledApp(t *testing.T, clusterInstance *cluster.LocalProcessCluster, throttlerApp throttlerapp.Name, expectThrottled bool)

Types

type Config

type Config struct {
	Query     string
	Threshold float64
}

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