tsmon

package
v0.0.0-...-781836f Latest Latest
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 Go to latest Published: Apr 19, 2024 License: Apache-2.0 Imports: 23 Imported by: 26

Documentation

Overview

Package tsmon contains global state and utility functions for configuring and interacting with tsmon. This has a similar API to the infra-python ts_mon module.

If your application accepts command line flags, then call InitializeFromFlags from your main function.

If you use tsmon on AppEngine, then see appengine/tsmon package doc.

Index

Constants

View Source 
const (
	// FlushManual requires the user to flush manually.
	FlushManual = FlushType("manual")
	// FlushAuto automatically flushes at a periodic flush interval.
	FlushAuto = FlushType("auto")
)

Variables

This section is empty.

Functions

func Flush 

func Flush(ctx context.Context) error

Flush sends all the metrics that are registered in the application.

func Initialize 

func Initialize(ctx context.Context, m monitor.Monitor, s store.Store)

Initialize configures the tsmon library with the given monitor and store.

func InitializeFromFlags 

func InitializeFromFlags(ctx context.Context, fl *Flags) error

InitializeFromFlags configures the tsmon library from flag values.

This will set a Target (information about what's reporting metrics) and a Monitor (where to send the metrics to).

func Monitor 

func Monitor(ctx context.Context) monitor.Monitor

Monitor returns the global monitor that sends metrics to monitoring endpoints. Defaults to a nil monitor, but changed by InitializeFromFlags.

func RegisterCallback 

func RegisterCallback(f Callback)

RegisterCallback registers a callback function that will be run at metric collection time to set the values of one or more metrics. RegisterCallback should be called from an init() function in your module.

func RegisterCallbackIn 

func RegisterCallbackIn(ctx context.Context, f Callback)

RegisterCallbackIn is like RegisterCallback but registers in a given context.

func RegisterGlobalCallback 

func RegisterGlobalCallback(f Callback, metrics ...types.Metric)

RegisterGlobalCallback registers a callback function that will be run once per minute on *one* instance of your application. It is supported primarily on GAE.

You must specify the list of metrics that your callback affects - these metrics will be reset after flushing to ensure they are not sent by multiple instances.

RegisterGlobalCallback should be called from an init() function in your module.

func RegisterGlobalCallbackIn 

func RegisterGlobalCallbackIn(ctx context.Context, f Callback, metrics ...types.Metric)

RegisterGlobalCallbackIn is like RegisterGlobalCallback but registers in a given context.

func ResetCumulativeMetrics 

func ResetCumulativeMetrics(ctx context.Context)

ResetCumulativeMetrics resets only cumulative metrics.

func SetStore 

func SetStore(ctx context.Context, s store.Store)

SetStore changes the global metric store. All metrics that were registered with the old store will be re-registered on the new store.

func Shutdown 

func Shutdown(ctx context.Context)

Shutdown gracefully terminates the tsmon by doing the final flush and disabling auto flush (if it was enabled).

It resets Monitor and Store.

Logs error to standard logger. Does nothing if tsmon wasn't initialized.

func Store 

func Store(ctx context.Context) store.Store

Store returns the global metric store that contains all the metric values for this process. Applications shouldn't need to access this directly - instead use the metric objects which provide type-safe accessors.

func WithDummyInMemory 

func WithDummyInMemory(ctx context.Context) (context.Context, *monitor.Fake)

WithDummyInMemory returns a new context holding a new State with a new in- memory store and a fake monitor.

func WithFakes 

func WithFakes(ctx context.Context) (context.Context, *store.Fake, *monitor.Fake)

WithFakes returns a new context holding a new State with a fake store and a fake monitor.

func WithState 

func WithState(ctx context.Context, s *State) context.Context

WithState returns a new context holding the given State instance.

Types

type Callback 

type Callback func(ctx context.Context)

Callback is a function that is run at metric collection time to set the values of one or more metrics. A callback can be registered with RegisterCallback.

type Flags 

type Flags struct {
	ConfigFile    string
	Endpoint      string
	Credentials   string
	ActAs         string
	Flush         FlushType
	FlushInterval time.Duration

	Target target.Flags
}

Flags defines command line flags related to tsmon. Use NewFlags() to get a Flags struct with sensible default values.

func NewFlags 

func NewFlags() Flags

NewFlags returns a Flags struct with sensible default values.

func (*Flags) Register 

func (fl *Flags) Register(f *flag.FlagSet)

Register adds tsmon related flags to a FlagSet.

type FlushType 

type FlushType string

FlushType is a flush type enumeration.

func (*FlushType) Set 

func (ft *FlushType) Set(v string) error

Set implements flag.Value.

func (*FlushType) String 

func (ft *FlushType) String() string

type GlobalCallback 

type GlobalCallback struct {
	Callback
	// contains filtered or unexported fields
}

A GlobalCallback is a Callback with the list of metrics it affects, so those metrics can be reset after they are flushed.

type State 

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

State holds the configuration of the tsmon library. There is one global instance of State, but it can be overridden in a Context by tests.

func GetState 

func GetState(ctx context.Context) *State

GetState returns the State instance held in the context (if set) or else returns the global State.

func NewState 

func NewState() *State

NewState returns a new State instance, configured with a nil store and nil monitor. By default, global callbacks that are registered will be invoked when flushing registered metrics.

func (*State) Callbacks 

func (s *State) Callbacks() []Callback

Callbacks returns all registered Callbacks.

func (*State) Flush 

func (s *State) Flush(ctx context.Context, mon monitor.Monitor) error

Flush sends all the metrics that are registered in the application.

Uses given monitor if not nil, otherwise the State's current monitor.

func (*State) GlobalCallbacks 

func (s *State) GlobalCallbacks() []GlobalCallback

GlobalCallbacks returns all registered GlobalCallbacks.

func (*State) InhibitGlobalCallbacksOnFlush 

func (s *State) InhibitGlobalCallbacksOnFlush()

InhibitGlobalCallbacksOnFlush signals that the registered global callbacks are not to be executed upon flushing registered metrics.

func (*State) InvokeGlobalCallbacksOnFlush 

func (s *State) InvokeGlobalCallbacksOnFlush()

InvokeGlobalCallbacksOnFlush signals that the registered global callbacks are to be be executed upon flushing registered metrics.

func (*State) Monitor 

func (s *State) Monitor() monitor.Monitor

Monitor returns the State's monitor.

func (*State) ParallelFlush 

func (s *State) ParallelFlush(ctx context.Context, mon monitor.Monitor, workers int) error

ParallelFlush is similar to Flush, but sends multiple requests in parallel.

This can be useful to optimize the total duration of flushing for an excessive number of cells.

Panics if workers < 1.

func (*State) RegisterCallbacks 

func (s *State) RegisterCallbacks(f ...Callback)

RegisterCallbacks registers the given Callback(s) with State.

func (*State) RegisterGlobalCallbacks 

func (s *State) RegisterGlobalCallbacks(f ...GlobalCallback)

RegisterGlobalCallbacks registers the given GlobalCallback(s) with State.

func (*State) ResetCumulativeMetrics 

func (s *State) ResetCumulativeMetrics(ctx context.Context)

ResetCumulativeMetrics resets only cumulative metrics.

func (*State) RunGlobalCallbacks 

func (s *State) RunGlobalCallbacks(ctx context.Context)

RunGlobalCallbacks runs all registered global callbacks that produce global metrics.

See RegisterGlobalCallback for more info.

func (*State) SetMonitor 

func (s *State) SetMonitor(m monitor.Monitor)

SetMonitor sets the Store's monitor.

func (*State) SetStore 

func (s *State) SetStore(st store.Store)

SetStore changes the metric store. All metrics that were registered with the old store will be re-registered on the new store.

func (*State) Store 

func (s *State) Store() store.Store

Store returns the State's store.

Source Files

View all Source files

Directories

Path Synopsis
Package distribution contains distribution metrics, fixed width and geometric bucketers.
 Package distribution contains distribution metrics, fixed width and geometric bucketers.
examples
beep
package dummy_project implements a demo application that populates monitoring data for a dummy_project.
 package dummy_project implements a demo application that populates monitoring data for a dummy_project.
beep/dummy_project
dummy_project implements a monitoring target interface for DummyProject.
 dummy_project implements a monitoring target interface for DummyProject.
Package field contains constructors for metric field definitions.
 Package field contains constructors for metric field definitions.
Package metric is the API for defining metrics and updating their values.
 Package metric is the API for defining metrics and updating their values.
Package monitor contains the code for sending metric data to monitoring endpoints.
 Package monitor contains the code for sending metric data to monitoring endpoints.
Package registry holds a map of all metrics registered by the process.
 Package registry holds a map of all metrics registered by the process.
Package runtimestats exposes metrics related to the Go runtime.
 Package runtimestats exposes metrics related to the Go runtime.
Package store contains code for storing and retrieving metrics.
 Package store contains code for storing and retrieving metrics.
storetest
Package storetest is imported exclusively by tests for Store implementations.
 Package storetest is imported exclusively by tests for Store implementations.
Package target contains information about the thing that is sending metrics - either a NetworkDevice (a machine) or a Task (a service).
 Package target contains information about the thing that is sending metrics - either a NetworkDevice (a machine) or a Task (a service).
Package ts_mon_proto contains ts_mon protobuf source and generated protobuf data.
 Package ts_mon_proto contains ts_mon protobuf source and generated protobuf data.
Package types contains miscellaneous structs and interfaces used throughout tsmon.
 Package types contains miscellaneous structs and interfaces used throughout tsmon.
Package versions allows processes to report string-valued metrics with versions of various libraries they link with.
 Package versions allows processes to report string-valued metrics with versions of various libraries they link with.

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