Fluentd v1 and Roadmap

May 13, 2014

www.treasuredata.com/

Fluentd v1 and Roadmap

Masahiro Nakagawa Treasure Data, Inc

1

Who are you?

• Masahiro Nakagawa

• @repeatedly

• Treasure Data, Inc.

• Senior Software Engineer

• Fluentd, td-agent, etc...

• Dlang, MessagePack, ...

2

Structured logging !

Reliable forwarding !

Pluggable architecture

http://fluentd.org/

M x N → M + N

4

Nagios

MongoDB

Hadoop

Alerting

Amazon S3

Analysis

Archiving

MySQL

Apache

Frontend

Access logs

syslogd

App logs

System logs

Backend

Databasesbuffer / buffer / routing

v10 (gem v0.10.x)

• Mainly for log forwarding

• with good performance

• working in production (at Nintendo, etc.)

• Various plugins are released

• There are 250+ plugins!

• Mainly for CRuby

5

v11 is gone…

• Started two years ago

• Required dramatic API changes…

• What does ‘v11’ mean?

• Where is ‘v10’?

• See the following article

6

http://repeatedly.github.io/ja/2014/03/about-fluentd-v11/

v1 is coming!

• Merge useful v11 features

• No breaking API compatibility

• Will go over features in later slides

• Clear versioning and stability

• https://github.com/fluent/fluentd/issues/251

7

Must features

8

New configuration

• Can use Hash, Array and others

• No need for “,” or similar tricks

• You can write Ruby code directly

• Can use via “--use-v1-config” option

• available since v0.10.46

• Worker pragma (nice to have)

9

• Can write complex values without DSL!

• Can use Ruby code for configuration

New parameter types

10

<source> type my_tail keys ["k1", "k2", "k3"] </source> !<match **> typo my_filter add_keys {"k1" : "v1"} </match>

<match **> type my_filter env "#{ENV['KEY']}" </match>

Hash, Array, etc: Embedded Ruby code:

• Socket.gethostname

• `command`

• etc...

Filter / Label support

• No more tag-related tricks!

• add_tag_xxx, remove_tag_xxx, etc...

!

• Redirect events to another group

• Much easier to group and share plugins

11

Filter

• <match> can have nested <match>

• Configuration format is not fixed!

12

<match access.**> type flowcounter add_tag_prefix counted </match> !<match counted.**> type growthforecast </match>

<match access.** copy> type flowcounter ! <match **> type growthforecast </match> </match>

v10: v1:

Label

• <label> can contain multiple <match>

• out_redirect can forward events to <label>

13

<match access.**> type rewrite_tag_filter ... <match bang.**> type redirect to_label blackhole </match> ... </match>

<label blackhole> <match **> type null </match> </label>

bang’s records go away!

Improved plugin

• Error stream

• with @ERROR label

• No more global API, Engine.emit, $log, etc...

• Log level per plugin

• available since v0.10.43

• Actor (nice to have)

14

ERROR!

Error stream

• Can handle an error at each record level

15

{"event":1, ...}

{"event":2, ...}

{"event":3, ...}

chunk1

{"event":4, ...}

{"event":5, ...}

{"event":6, ...}

chunk2

…

Input

OK

ERROR!

OK

OK

OK

Output

<label @ERROR> <match **> type file ... </match> </label>

Error stream

Built-in @ERROR is used when error occurred in “emit”

Nice to have features

16

ServerEngine based

• Robust signal handling

• Put a signal into Queue first

• Built-in supervisor

• Multiprocess support

• No need for in_multiprocess plugin

17

Multi Process

18

Worker

Supervisor

Worker Worker

Separate stream pipelines in one instance!

<worker> input tail output mongo </worker>

<worker> input forward output webhdfs </worker>

<worker> input foo output bar </worker>

• SocketManager shares resources with workers

Zero downtime restart

19

SupervisorTCP

1. Listen to TCP socket

• SocketManager shares resources with workers

Zero downtime restart

20

Worker

Supervisor

heartbeat

TCP

TCP

1. Listen to TCP socket

2. Pass its socket to worker

• SocketManager shares resources with workers

Zero downtime restart

21

Worker

Supervisor

Worker

TCP

TCP

1. Listen to TCP socket

2. Pass its socket to worker

3. Do same actionat worker restartingwith keeping TCP socket

heartbeat

Actor• Easy to write popular routines

• Hide the implementation details

22

class TimerWatcher < Coolio::TimerWatcher ... end !def start @loop = Coolio::Loop.new @timer = ... @loop.attach(@timer) @thread = ... end

actor.every(@interval) { event_router.emit(...) }

v10: v1:

Others

23

JRuby and Windows

• Windows support

• Need testers!

• https://github.com/fluent/fluentd/tree/windows

• JRuby support

• https://github.com/fluent/fluentd/issues/317

24

td-agent2

25

• Use Ruby 2.1.2

• Update core libraries

• msgpack, cool.io and etc

• Use v1 config by default

• http://docs.fluentd.org/articles/config-file#v1-format

26New website…?

Conclusion

27

• Fluend advances to the next stage!

• v1 will be released

• No breaking API compatibility

• td-agent2 will be released in this month

• New website with good contents?

• Need patches or feedback!