package dmflakey

import "go.etcd.io/bbolt/tests/dmflakey"

Index ¶

• type FSType
• type FeatOpt
• func WithIntervalFeatOpt(interval time.Duration) FeatOpt
• func WithSyncFSFeatOpt(syncFS bool) FeatOpt
• type Flakey
• func InitFlakey(flakeyDevice, dataStorePath string, fsType FSType, mkfsOpt string) (_ Flakey, retErr error)

Types ¶

type FSType ¶

type FSType string

FSType represents the filesystem name.

const (
	FSTypeEXT4 FSType = "ext4"
	FSTypeXFS  FSType = "xfs"
)

Supported filesystems.

type FeatOpt ¶

type FeatOpt func(*featCfg)

FeatOpt is used to configure failure feature.

func WithIntervalFeatOpt ¶

func WithIntervalFeatOpt(interval time.Duration) FeatOpt

WithIntervalFeatOpt updates the up time for the feature.

func WithSyncFSFeatOpt ¶

func WithSyncFSFeatOpt(syncFS bool) FeatOpt

WithSyncFSFeatOpt is to determine if the caller wants to synchronize filesystem before inject failure.

type Flakey ¶

type Flakey interface {
	// DevicePath returns the flakey device path.
	DevicePath() string

	// Filesystem returns filesystem's type.
	Filesystem() FSType

	// AllowWrites allows write I/O.
	AllowWrites(opts ...FeatOpt) error

	// DropWrites drops all write I/O silently.
	DropWrites(opts ...FeatOpt) error

	// ErrorWrites drops all write I/O and returns error.
	ErrorWrites(opts ...FeatOpt) error

	// Teardown releases the flakey device.
	Teardown() error
}

Flakey is to inject failure into device.

func InitFlakey ¶

func InitFlakey(flakeyDevice, dataStorePath string, fsType FSType, mkfsOpt string) (_ Flakey, retErr error)

InitFlakey creates an filesystem on a loopback device and returns Flakey on it.

The device-mapper device will be /dev/mapper/$flakeyDevice. And the filesystem image will be created at $dataStorePath/$flakeyDevice.img. By default, the device is available for 2 minutes and size is 10 GiB.

Source Files ¶

dmflakey.go dmsetup.go loopback.go