Documentation

Index

Constants

This section is empty.

Variables

View Source
var ErrNeglectedContainer = fmt.Errorf("Neglected container")

ErrNeglectedContainer not define logger name

View Source
var ErrReadLogsNotSupported = errors.New("configured logging driver does not support reading")

ErrReadLogsNotSupported is returned when the logger does not support reading logs.

View Source
var RFC3339NanoFixed = "2006-01-02T15:04:05.000000000Z07:00"

RFC3339NanoFixed time format

Functions

func PutMessage

func PutMessage(msg *Message)

PutMessage puts the specified message back n the message pool. The message fields are reset before putting into the pool.

func RegisterLogDriver

func RegisterLogDriver(name string, c Creator) error

RegisterLogDriver registers the given logging driver builder with given logging driver name.

func RegisterLogOptValidator

func RegisterLogOptValidator(name string, l LogOptValidator) error

RegisterLogOptValidator registers the logging option validator with the given logging driver name.

func ValidateLogOpts

func ValidateLogOpts(name string, cfg map[string]string) error

ValidateLogOpts checks the options for the given log driver. The options supported are specific to the LogDriver implementation.

Types

type ContainerEvent

type ContainerEvent struct {
	Action    string
	Container types.ContainerJSON
}

ContainerEvent container event

type ContainerLog

type ContainerLog struct {
	types.ContainerJSON
	LogCopier *Copier
	LogDriver []Logger
	// contains filtered or unexported fields
}

ContainerLog container log struct

func (*ContainerLog) Close

func (container *ContainerLog) Close()

Close close

func (*ContainerLog) Restart

func (container *ContainerLog) Restart()

Restart restart

func (*ContainerLog) StartLogging

func (container *ContainerLog) StartLogging() error

StartLogging start copy log

func (*ContainerLog) Stop

func (container *ContainerLog) Stop()

Stop stop copy container log

type ContainerLogManage

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

ContainerLogManage container log manage

func CreatContainerLogManage

func CreatContainerLogManage(conf *option.Conf) *ContainerLogManage

CreatContainerLogManage create a container log manage

func (*ContainerLogManage) Start

func (c *ContainerLogManage) Start() error

Start start

func (*ContainerLogManage) Stop

func (c *ContainerLogManage) Stop()

Stop stop all logger

type ContainerLoggerConfig

type ContainerLoggerConfig struct {
	Name    string
	Options map[string]string
}

ContainerLoggerConfig logger config

type Copier

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

Copier can copy logs from specified sources to Logger and attach Timestamp. Writes are concurrent, so you need implement some sync in your logger.

func NewCopier

func NewCopier(logfile *LogFile, dst []Logger, since time.Time) *Copier

NewCopier creates a new Copier

func (*Copier) Close

func (c *Copier) Close()

Close closes the copier

func (*Copier) Run

func (c *Copier) Run()

Run starts logs copying

type Creator

type Creator func(Info) (Logger, error)

Creator builds a logging driver instance with given context.

func GetLogDriver

func GetLogDriver(name string) (Creator, error)

GetLogDriver provides the logging driver builder for a logging driver name.

type GetTailReaderFunc

type GetTailReaderFunc func(ctx context.Context, f SizeReaderAt, nLogLines int) (rdr io.Reader, nLines int, err error)

GetTailReaderFunc is used to truncate a reader to only read as much as is required in order to get the passed in number of log lines. It returns the sectioned reader, the number of lines that the section reader contains, and any error that occurs.

type Info

type Info struct {
	Config              map[string]string
	ContainerID         string
	ContainerName       string
	ContainerEntrypoint string
	ContainerArgs       []string
	ContainerImageID    string
	ContainerImageName  string
	ContainerCreated    time.Time
	ContainerEnv        []string
	ContainerLabels     map[string]string
	LogPath             string
	DaemonName          string
}

Info provides enough information for a logging driver to do its function.

func (*Info) Command

func (info *Info) Command() string

Command returns the command that the container being logged was started with. The Entrypoint is prepended to the container arguments.

func (*Info) ExtraAttributes

func (info *Info) ExtraAttributes(keyMod func(string) string) map[string]string

ExtraAttributes returns the user-defined extra attributes (labels, environment variables) in key-value format. This can be used by log drivers that support metadata to add more context to a log.

func (*Info) FullID

func (info *Info) FullID() string

FullID is an alias of ContainerID.

func (*Info) Hostname

func (info *Info) Hostname() (string, error)

Hostname returns the hostname from the underlying OS.

func (*Info) ID

func (info *Info) ID() string

ID Returns the Container ID shortened to 12 characters.

func (*Info) ImageFullID

func (info *Info) ImageFullID() string

ImageFullID is an alias of ContainerImageID.

func (*Info) ImageID

func (info *Info) ImageID() string

ImageID returns the ContainerImageID shortened to 12 characters.

func (*Info) ImageName

func (info *Info) ImageName() string

ImageName is an alias of ContainerImageName

func (*Info) Name

func (info *Info) Name() string

Name returns the ContainerName without a preceding '/'.

type LogAttributes

type LogAttributes map[string]string

LogAttributes is used to hold the extra attributes available in the log message Primarily used for converting the map type to string and sorting.

type LogFile

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

LogFile is Logger implementation for default Docker logging.

func NewLogFile

func NewLogFile(logPath string, maxFiles int, compress bool, decodeFunc makeDecoderFunc, perms os.FileMode, getTailReader GetTailReaderFunc) (*LogFile, error)

NewLogFile creates new LogFile

func (*LogFile) Close

func (w *LogFile) Close() error

Close file close

func (*LogFile) ReadLogs

func (w *LogFile) ReadLogs(config ReadConfig, watcher *LogWatcher)

ReadLogs decodes entries from log files and sends them the passed in watcher

Note: Using the follow option can become inconsistent in cases with very frequent rotations and max log files is 1. TODO: Consider a different implementation which can effectively follow logs under frequent rotations.

type LogOptValidator

type LogOptValidator func(cfg map[string]string) error

LogOptValidator checks the options specific to the underlying logging implementation.

type LogWatcher

type LogWatcher struct {
	// For sending log messages to a reader.
	Msg chan *Message
	// For sending error messages that occur while while reading logs.
	Err chan error
	// contains filtered or unexported fields
}

LogWatcher is used when consuming logs read from the LogReader interface.

func NewLogWatcher

func NewLogWatcher() *LogWatcher

NewLogWatcher returns a new LogWatcher.

func (*LogWatcher) Close

func (w *LogWatcher) Close()

Close notifies the underlying log reader to stop.

func (*LogWatcher) ConsumerGone

func (w *LogWatcher) ConsumerGone()

ConsumerGone notifies that the logs consumer is gone.

func (*LogWatcher) ProducerGone

func (w *LogWatcher) ProducerGone()

ProducerGone notifies the underlying log reader that the logs producer (a container) is gone.

func (*LogWatcher) WatchClose

func (w *LogWatcher) WatchClose() <-chan struct{}

WatchClose returns a channel receiver that receives notification when the watcher has been closed. This should only be called from one goroutine.

func (*LogWatcher) WatchConsumerGone

func (w *LogWatcher) WatchConsumerGone() <-chan struct{}

WatchConsumerGone returns a channel receiver that receives notification when the log watcher consumer is gone.

func (*LogWatcher) WatchProducerGone

func (w *LogWatcher) WatchProducerGone() <-chan struct{}

WatchProducerGone returns a channel receiver that receives notification once the logs producer (a container) is gone.

type Logger

type Logger interface {
	Log(*Message) error
	Name() string
	Close() error
}

Logger is the interface for docker logging drivers.

type Message

type Message struct {
	Line      []byte
	Source    string
	Timestamp time.Time
	Attrs     LogAttributes
	Partial   bool
}

Message is datastructure that represents piece of output produced by some container. The Line member is a slice of an array whose contents can be changed after a log driver's Log() method returns. Any changes made to this struct must also be updated in the `reset` function

func NewMessage

func NewMessage() *Message

NewMessage returns a new message from the message sync.Pool

type ReadConfig

type ReadConfig struct {
	Since  time.Time
	Until  time.Time
	Tail   int
	Follow bool
}

ReadConfig read log config

type SizeReaderAt

type SizeReaderAt interface {
	io.ReaderAt
	Size() int64
}

SizeReaderAt defines a ReaderAt that also reports its size. This is used for tailing log files.

Directories

Path Synopsis
streamlog
testlog