fingerprint

package
v0.3.1 Latest Latest
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 Go to latest Published: Mar 16, 2016 License: MPL-2.0 Imports: 24 Imported by: 0

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Index

Constants

View Source 
const DEFAULT_AWS_URL = "http://169.254.169.254/latest/meta-data/"

This is where the AWS metadata server normally resides. We hardcode the "instance" path as well since it's the only one we access here.

View Source 
const DEFAULT_GCE_URL = "http://169.254.169.254/computeMetadata/v1/instance/"

This is where the GCE metadata server normally resides. We hardcode the "instance" path as well since it's the only one we access here.

View Source 
const EmptyDuration = time.Duration(0)

EmptyDuration is to be used by fingerprinters that are not periodic.

Variables

View Source 
var BuiltinFingerprints = []string{
	"arch",
	"cgroup",
	"consul",
	"cpu",
	"env_aws",
	"env_gce",
	"host",
	"memory",
	"network",
	"storage",
}

BuiltinFingerprints is a slice containing the key names of all registered fingerprints available, to provided an ordered iteration

Functions

func FindCgroupMountpointDir added in v0.3.0 

func FindCgroupMountpointDir() (string, error)

FindCgroupMountpointDir is used to find the cgroup mount point on a Linux system.

Types

type ArchFingerprint 

type ArchFingerprint struct {
	StaticFingerprinter
	// contains filtered or unexported fields
}

ArchFingerprint is used to fingerprint the architecture

func (*ArchFingerprint) Fingerprint 

func (f *ArchFingerprint) Fingerprint(config *client.Config, node *structs.Node) (bool, error)

type CGroupFingerprint added in v0.3.0 

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

func (*CGroupFingerprint) Fingerprint added in v0.3.0 

func (f *CGroupFingerprint) Fingerprint(cfg *client.Config, node *structs.Node) (bool, error)

Fingerprint tries to find a valid cgroup moint point

func (*CGroupFingerprint) Periodic added in v0.3.0 

func (f *CGroupFingerprint) Periodic() (bool, time.Duration)

Periodic determines the interval at which the periodic fingerprinter will run.

type CPUFingerprint 

type CPUFingerprint struct {
	StaticFingerprinter
	// contains filtered or unexported fields
}

CPUFingerprint is used to fingerprint the CPU

func (*CPUFingerprint) Fingerprint 

func (f *CPUFingerprint) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

type ConsulFingerprint 

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

ConsulFingerprint is used to fingerprint the architecture

func (*ConsulFingerprint) Fingerprint 

func (f *ConsulFingerprint) Fingerprint(config *client.Config, node *structs.Node) (bool, error)

func (*ConsulFingerprint) Periodic added in v0.2.0 

func (f *ConsulFingerprint) Periodic() (bool, time.Duration)

type DefaultMountPointDetector added in v0.3.0 

type DefaultMountPointDetector struct {
}

Implements the interface detector which calls the cgroups library directly

func (*DefaultMountPointDetector) MountPoint added in v0.3.0 

func (b *DefaultMountPointDetector) MountPoint() (string, error)

Call out to the default cgroup library

type DefaultNetworkInterfaceDetector added in v0.2.0 

type DefaultNetworkInterfaceDetector struct {
}

Implements the interface detector which calls net directly

func (*DefaultNetworkInterfaceDetector) Addrs added in v0.2.0 

func (b *DefaultNetworkInterfaceDetector) Addrs(intf *net.Interface) ([]net.Addr, error)

func (*DefaultNetworkInterfaceDetector) InterfaceByName added in v0.2.0 

func (b *DefaultNetworkInterfaceDetector) InterfaceByName(name string) (*net.Interface, error)

func (*DefaultNetworkInterfaceDetector) Interfaces added in v0.2.0 

func (b *DefaultNetworkInterfaceDetector) Interfaces() ([]net.Interface, error)

type EnvAWSFingerprint 

type EnvAWSFingerprint struct {
	StaticFingerprinter
	// contains filtered or unexported fields
}

EnvAWSFingerprint is used to fingerprint AWS metadata

func (*EnvAWSFingerprint) Fingerprint 

func (f *EnvAWSFingerprint) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

type EnvGCEFingerprint added in v0.2.0 

type EnvGCEFingerprint struct {
	StaticFingerprinter
	// contains filtered or unexported fields
}

EnvGCEFingerprint is used to fingerprint GCE metadata

func (*EnvGCEFingerprint) Fingerprint added in v0.2.0 

func (f *EnvGCEFingerprint) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

func (*EnvGCEFingerprint) Get added in v0.2.0 

func (f *EnvGCEFingerprint) Get(attribute string, recursive bool) (string, error)

type Factory 

type Factory func(*log.Logger) Fingerprint

Factory is used to instantiate a new Fingerprint

type Fingerprint 

type Fingerprint interface {
	// Fingerprint is used to update properties of the Node,
	// and returns if the fingerprint was applicable and a potential error.
	Fingerprint(*config.Config, *structs.Node) (bool, error)

	// Periodic is a mechanism for the fingerprinter to indicate that it should
	// be run periodically. The return value is a boolean indicating if it
	// should be periodic, and if true, a duration.
	Periodic() (bool, time.Duration)
}

Fingerprint is used for doing "fingerprinting" of the host to automatically determine attributes, resources, and metadata about it. Each of these is a heuristic, and many of them can be applied on a particular host.

func NewArchFingerprint 

func NewArchFingerprint(logger *log.Logger) Fingerprint

NewArchFingerprint is used to create an OS fingerprint

func NewCGroupFingerprint added in v0.3.0 

func NewCGroupFingerprint(logger *log.Logger) Fingerprint

NewCGroupFingerprint returns a new cgroup fingerprinter

func NewCPUFingerprint 

func NewCPUFingerprint(logger *log.Logger) Fingerprint

NewCPUFingerprint is used to create a CPU fingerprint

func NewConsulFingerprint 

func NewConsulFingerprint(logger *log.Logger) Fingerprint

NewConsulFingerprint is used to create an OS fingerprint

func NewEnvAWSFingerprint 

func NewEnvAWSFingerprint(logger *log.Logger) Fingerprint

NewEnvAWSFingerprint is used to create a fingerprint from AWS metadata

func NewEnvGCEFingerprint added in v0.2.0 

func NewEnvGCEFingerprint(logger *log.Logger) Fingerprint

NewEnvGCEFingerprint is used to create a fingerprint from GCE metadata

func NewFingerprint 

func NewFingerprint(name string, logger *log.Logger) (Fingerprint, error)

NewFingerprint is used to instantiate and return a new fingerprint given the name and a logger

func NewHostFingerprint 

func NewHostFingerprint(logger *log.Logger) Fingerprint

NewHostFingerprint is used to create a Host fingerprint

func NewMemoryFingerprint 

func NewMemoryFingerprint(logger *log.Logger) Fingerprint

NewMemoryFingerprint is used to create a Memory fingerprint

func NewNetworkFingerprinter 

func NewNetworkFingerprinter(logger *log.Logger) Fingerprint

NewNetworkFingerprinter returns a new NetworkFingerprinter with the given logger

func NewStorageFingerprint 

func NewStorageFingerprint(logger *log.Logger) Fingerprint

type GCEMetadataNetworkInterface added in v0.2.0 

type GCEMetadataNetworkInterface struct {
	AccessConfigs []struct {
		ExternalIp string
		Type       string
	}
	ForwardedIps []string
	Ip           string
	Network      string
}

type HostFingerprint 

type HostFingerprint struct {
	StaticFingerprinter
	// contains filtered or unexported fields
}

HostFingerprint is used to fingerprint the host

func (*HostFingerprint) Fingerprint 

func (f *HostFingerprint) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

type MemoryFingerprint 

type MemoryFingerprint struct {
	StaticFingerprinter
	// contains filtered or unexported fields
}

MemoryFingerprint is used to fingerprint the available memory on the node

func (*MemoryFingerprint) Fingerprint 

func (f *MemoryFingerprint) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

type MountPointDetector added in v0.3.0 

type MountPointDetector interface {
	MountPoint() (string, error)
}

An interface to isolate calls to the cgroup library This facilitates testing where we can implement fake mount points to test various code paths

type NetworkFingerprint 

type NetworkFingerprint struct {
	StaticFingerprinter
	// contains filtered or unexported fields
}

NetworkFingerprint is used to fingerprint the Network capabilities of a node

func (*NetworkFingerprint) Fingerprint 

func (f *NetworkFingerprint) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

type NetworkInterfaceDetector added in v0.2.0 

type NetworkInterfaceDetector interface {
	Interfaces() ([]net.Interface, error)
	InterfaceByName(name string) (*net.Interface, error)
	Addrs(intf *net.Interface) ([]net.Addr, error)
}

An interface to isolate calls to various api in net package This facilitates testing where we can implement fake interfaces and addresses to test varios code paths

type ReqError added in v0.2.0 

type ReqError struct {
	StatusCode int
}

func (ReqError) Error added in v0.2.0 

func (e ReqError) Error() string

type StaticFingerprinter added in v0.2.0 

type StaticFingerprinter struct{}

StaticFingerprinter can be embeded in a struct that has a Fingerprint method to make it non-periodic.

func (*StaticFingerprinter) Periodic added in v0.2.0 

func (s *StaticFingerprinter) Periodic() (bool, time.Duration)

type StorageFingerprint 

type StorageFingerprint struct {
	StaticFingerprinter
	// contains filtered or unexported fields
}

StorageFingerprint is used to measure the amount of storage free for applications that the Nomad agent will run on this machine.

func (*StorageFingerprint) Fingerprint 

func (f *StorageFingerprint) Fingerprint(cfg *config.Config, node *structs.Node) (bool, error)

Source Files

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