health

package
v1.66.2 Latest Latest
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 Go to latest Published: May 14, 2024 License: BSD-3-Clause Imports: 17 Imported by: 23

Documentation

Overview

Package health is a registry for other packages to report & check overall health status of the node.

Index

Constants

View Source 
const (
	// SysOverall is the name representing the overall health of
	// the system, rather than one particular subsystem.
	SysOverall = Subsystem("overall")

	// SysRouter is the name of the wgengine/router subsystem.
	SysRouter = Subsystem("router")

	// SysDNS is the name of the net/dns subsystem.
	SysDNS = Subsystem("dns")

	// SysDNSOS is the name of the net/dns OSConfigurator subsystem.
	SysDNSOS = Subsystem("dns-os")

	// SysDNSManager is the name of the net/dns manager subsystem.
	SysDNSManager = Subsystem("dns-manager")

	// SysTKA is the name of the tailnet key authority subsystem.
	SysTKA = Subsystem("tailnet-lock")
)

Variables

This section is empty.

Functions

func DebugHandler added in v1.20.0 

func DebugHandler(typ string) http.Handler

func RegisterDebugHandler added in v1.20.0 

func RegisterDebugHandler(typ string, h http.Handler)

Types

type ReceiveFunc added in v1.66.0 

type ReceiveFunc int

ReceiveFunc is one of the three magicsock Receive funcs (IPv4, IPv6, or DERP). 

const (
	ReceiveIPv4 ReceiveFunc = 0
	ReceiveIPv6 ReceiveFunc = 1
	ReceiveDERP ReceiveFunc = 2
)

ReceiveFunc indices for Tracker.MagicSockReceiveFuncs.

func (ReceiveFunc) String added in v1.66.0 

func (f ReceiveFunc) String() string

type ReceiveFuncStats added in v1.8.0 

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

ReceiveFuncStats tracks the calls made to a wireguard-go receive func.

func (*ReceiveFuncStats) Enter added in v1.8.0 

func (s *ReceiveFuncStats) Enter()

func (*ReceiveFuncStats) Exit added in v1.8.0 

func (s *ReceiveFuncStats) Exit()

type Subsystem added in v1.6.0 

type Subsystem string

Subsystem is the name of a subsystem whose health can be monitored.

type Tracker added in v1.66.0 

type Tracker struct {
	// MagicSockReceiveFuncs tracks the state of the three
	// magicsock receive functions: IPv4, IPv6, and DERP.
	MagicSockReceiveFuncs [3]ReceiveFuncStats // indexed by ReceiveFunc values
	// contains filtered or unexported fields
}

Tracker tracks the health of various Tailscale subsystems, comparing each subsystems' state with each other to make sure they're consistent based on the user's intended state.

func (*Tracker) AppendWarnableDebugFlags added in v1.66.0 

func (t *Tracker) AppendWarnableDebugFlags(base []string) []string

AppendWarnableDebugFlags appends to base any health items that are currently in failed state and were created with MapDebugFlag.

func (*Tracker) AppendWarnings added in v1.66.0 

func (t *Tracker) AppendWarnings(dst []string) []string

AppendWarnings appends all current health warnings to dst and returns the result.

func (*Tracker) DNSHealth added in v1.66.0 

func (t *Tracker) DNSHealth() error

DNSHealth returns the net/dns.Manager error state.

func (*Tracker) DNSOSHealth added in v1.66.0 

func (t *Tracker) DNSOSHealth() error

DNSOSHealth returns the net/dns.OSConfigurator error state.

func (*Tracker) GetDERPRegionReceivedTime added in v1.66.0 

func (t *Tracker) GetDERPRegionReceivedTime(region int) time.Time

GetDERPRegionReceivedTime returns the last time that a frame was received from the given DERP region, or the zero time if no communication with that region has occurred.

func (*Tracker) GetInPollNetMap added in v1.66.0 

func (t *Tracker) GetInPollNetMap() bool

GetInPollNetMap reports whether the client has an open HTTP long poll open to the control plane.

func (*Tracker) GotStreamedMapResponse added in v1.66.0 

func (t *Tracker) GotStreamedMapResponse()

GotStreamedMapResponse notes that we got a tailcfg.MapResponse message in streaming mode, even if it's just a keep-alive message.

This also notes that a map poll is in progress. To unset that, call SetOutOfPollNetMap().

func (*Tracker) NoteDERPRegionReceivedFrame added in v1.66.0 

func (t *Tracker) NoteDERPRegionReceivedFrame(region int)

NoteDERPRegionReceivedFrame is called to note that a frame was received from the given DERP region at the current time.

func (*Tracker) NoteMapRequestHeard added in v1.66.0 

func (t *Tracker) NoteMapRequestHeard(mr *tailcfg.MapRequest)

NoteMapRequestHeard notes whenever we successfully sent a map request to control for which we received a 200 response.

func (*Tracker) OverallError added in v1.66.0 

func (t *Tracker) OverallError() error

OverallError returns a summary of the health state.

If there are multiple problems, the error will be of type multierr.Error.

func (*Tracker) ReceiveFuncStats added in v1.66.0 

func (t *Tracker) ReceiveFuncStats(which ReceiveFunc) *ReceiveFuncStats

ReceiveFuncStats returns the ReceiveFuncStats tracker for the given func type.

If t is nil, it returns nil.

func (*Tracker) RegisterWatcher added in v1.66.0 

func (t *Tracker) RegisterWatcher(cb func(key Subsystem, err error)) (unregister func())

RegisterWatcher adds a function that will be called if an error changes state either to unhealthy or from unhealthy. It is not called on transition from unknown to healthy. It must be non-nil and is run in its own goroutine. The returned func unregisters it.

func (*Tracker) RouterHealth added in v1.66.0 

func (t *Tracker) RouterHealth() error

RouterHealth returns the wgengine/router.Router error state.

func (*Tracker) SetAnyInterfaceUp added in v1.66.0 

func (t *Tracker) SetAnyInterfaceUp(up bool)

SetAnyInterfaceUp sets whether any network interface is up.

func (*Tracker) SetAuthRoutineInError added in v1.66.0 

func (t *Tracker) SetAuthRoutineInError(err error)

SetAuthRoutineInError records the latest error encountered as a result of a login attempt. Providing a nil error indicates successful login, or that being logged in w/coordination is not currently desired.

func (*Tracker) SetCheckForUpdates added in v1.66.0 

func (t *Tracker) SetCheckForUpdates(v bool)

SetCheckForUpdates sets whether the client wants to check for updates.

func (*Tracker) SetControlHealth added in v1.66.0 

func (t *Tracker) SetControlHealth(problems []string)

func (*Tracker) SetDERPRegionConnectedState added in v1.66.0 

func (t *Tracker) SetDERPRegionConnectedState(region int, connected bool)

func (*Tracker) SetDERPRegionHealth added in v1.66.0 

func (t *Tracker) SetDERPRegionHealth(region int, problem string)

SetDERPRegionHealth sets or clears any problem associated with the provided DERP region.

func (*Tracker) SetDNSHealth added in v1.66.0 

func (t *Tracker) SetDNSHealth(err error)

SetDNSHealth sets the state of the net/dns.Manager

func (*Tracker) SetDNSManagerHealth added in v1.66.0 

func (t *Tracker) SetDNSManagerHealth(err error)

SetDNSManagerHealth sets the state of the Linux net/dns manager's discovery of the /etc/resolv.conf situation.

func (*Tracker) SetDNSOSHealth added in v1.66.0 

func (t *Tracker) SetDNSOSHealth(err error)

SetDNSOSHealth sets the state of the net/dns.OSConfigurator

func (*Tracker) SetIPNState added in v1.66.0 

func (t *Tracker) SetIPNState(state string, wantRunning bool)

state is an ipn.State.String() value: "Running", "Stopped", "NeedsLogin", etc.

func (*Tracker) SetLatestVersion added in v1.66.0 

func (t *Tracker) SetLatestVersion(v *tailcfg.ClientVersion)

SetLatestVersion records the latest version of the Tailscale client. v can be nil if unknown.

func (*Tracker) SetLocalLogConfigHealth added in v1.66.0 

func (t *Tracker) SetLocalLogConfigHealth(err error)

SetLocalLogConfigHealth sets the error state of this client's local log configuration.

func (*Tracker) SetMagicSockDERPHome added in v1.66.0 

func (t *Tracker) SetMagicSockDERPHome(region int, homeless bool)

SetMagicSockDERPHome notes what magicsock's view of its home DERP is.

The homeless parameter is whether magicsock is running in DERP-disconnected mode, without discovering and maintaining a connection to its home DERP.

func (*Tracker) SetOutOfPollNetMap added in v1.66.0 

func (t *Tracker) SetOutOfPollNetMap()

SetOutOfPollNetMap records that the client is no longer in an HTTP map request long poll to the control plane.

func (*Tracker) SetRouterHealth added in v1.66.0 

func (t *Tracker) SetRouterHealth(err error)

SetRouterHealth sets the state of the wgengine/router.Router.

func (*Tracker) SetTKAHealth added in v1.66.0 

func (t *Tracker) SetTKAHealth(err error)

SetTKAHealth sets the health of the tailnet key authority.

func (*Tracker) SetTLSConnectionError added in v1.66.0 

func (t *Tracker) SetTLSConnectionError(host string, err error)

SetTLSConnectionError sets the error state for connections to a specific host. Setting the error to nil will clear any previously-set error.

func (*Tracker) SetUDP4Unbound added in v1.66.0 

func (t *Tracker) SetUDP4Unbound(unbound bool)

SetUDP4Unbound sets whether the udp4 bind failed completely.

func (*Tracker) SetWarnable added in v1.66.0 

func (t *Tracker) SetWarnable(w *Warnable, err error)

Set updates the Warnable's state. If non-nil, it's considered unhealthy.

func (*Tracker) TKAHealth added in v1.66.0 

func (t *Tracker) TKAHealth() error

TKAHealth returns the tailnet key authority error state.

type Warnable added in v1.34.0 

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

Warnable is a health check item that may or may not be in a bad warning state. The caller of NewWarnable is responsible for calling Tracker.SetWarnable to update the state.

func NewWarnable added in v1.34.0 

func NewWarnable(opts ...WarnableOpt) *Warnable

NewWarnable returns a new warnable item that the caller can mark as health or in warning state via Tracker.SetWarnable.

NewWarnable is generally called in init and stored in a package global. It can be used by multiple Trackers.

type WarnableOpt added in v1.34.0 

type WarnableOpt interface {
	// contains filtered or unexported methods
}

WarnableOpt is an option passed to NewWarnable.

func WithConnectivityImpact added in v1.62.0 

func WithConnectivityImpact() WarnableOpt

WithConnectivityImpact returns an option which makes a Warnable annotated as something that could be breaking external network connectivity on the machine. This will make the warnable returned by OverallError alongside network connectivity errors.

func WithMapDebugFlag added in v1.34.0 

func WithMapDebugFlag(name string) WarnableOpt

WithMapDebugFlag returns a WarnableOpt for NewWarnable that makes the returned Warnable report itself to the coordination server as broken with this string in MapRequest.DebugFlag when Set to a non-nil value.

Source Files

View all Source files

Directories

Path Synopsis
Package healthmsg contains some constants for health messages.
 Package healthmsg contains some constants for health messages.

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