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Fluentd: the missing log collector
Kiyoto Tamura
Sorry about the corporate chrome!
  I am a Keynote n00b. Recycling my CTO’s slides.

  Thanks Melissa O’Neill@Harvey Mudd for “PDF to
  Keynote”. Saved my life.




                                                    2
It's like syslogd, but uses JSON for log
                 messages


                                                            8
Tuesday, July 17, 2012
Logging in JSON? Why?

• Machine-readable: More and more
  logs are getting consumed by
  machines, not homo sapiens. You
  want some structure...
• Schema-free: but not too much
  structure. Data evolve fast and you
  need to adapt quickly.

                                        4
Logs As TEXT


   Logs As JSON



                         + Field Name
                         + No Custom Parser
                         + Type Information
                         + Schema Free

                                       10
Tuesday, July 17, 2012
Logs As TEXT
         “2011-04-01 host1 myapp: cmessage size=12MB user=me”

   Logs As JSON
                         2011-04-01 myapp.message {
                             “on_host”: ”host1”,
                             ”combined”: true,
                             “size”: 12000000,     + Field Name
                             “user”: “me”          + No Custom Parser
                                                   + Type Information
                         }                         + Schema Free

                                                                 10
Tuesday, July 17, 2012
Fluentd Architecture




Tuesday, July 17, 2012
Fluentd: Log Format

                         Application



                          Fluentd




                          Storage


                                                14
Tuesday, July 17, 2012
Fluentd: Log Format

                         Application

                                       2012-02-04 01:33:51
                                       myapp.buylog {
                          Fluentd
                                           “user”: ”me”,
                                           “path”: “/buyItem”,
                                           “price”: 150,
                                           “referer”: “/landing”
                          Storage      }


                                                                   14
Tuesday, July 17, 2012
Fluentd: Log Format

                                                       time
                         Application                    tag
                                       2012-02-04 01:33:51
                                       myapp.buylog {
                          Fluentd
                                           “user”: ”me”,
                                           “path”: “/buyItem”,
                                           “price”: 150,
                                           “referer”: “/landing”
                          Storage      }
                                                    record

                                                                   14
Tuesday, July 17, 2012
Fluentd: Plugins

                             Application



                                           filter / buffer /
                              Fluentd
                                           routing




                              Storage


                                                              15
Tuesday, July 17, 2012
Fluentd: Plugins

                                       Application



                                                     filter / buffer /
                                        Fluentd
                                                     routing




                          SaaS          Storage            Fluentd

                         Plug-in        Plug-in           Plug-in
                                                                        16
Tuesday, July 17, 2012
Fluentd: Plugins

            syslogd         Scribe     Application          File Plug-in

                                                     tail
           Plug-in Plug-in
                                                      filter / buffer /
                                        Fluentd
                                                      routing




                          SaaS          Storage                Fluentd

                         Plug-in        Plug-in               Plug-in
                                                                           16
Tuesday, July 17, 2012
•       Client libraries
                   > Ruby
                   > Perl             Application         Buffering

                   > PHP
                                            HTTP / TCP / UDS
                   > Python
                   > Java              Fluentd
                   > ...




                                                                17
Tuesday, July 17, 2012
•       Client libraries
                   > Ruby
                   > Perl               Application         Buffering

                   > PHP
                                              HTTP / TCP / UDS
                   > Python
                   > Java                Fluentd
                   > ...


            Fluent.open(“myapp”)
            Fluent.event(“login”, {“user”=>38})
            #=> 2012-02-04 04:56:01 myapp.login    {“user”:38}

                                                                  17
Tuesday, July 17, 2012
Typical Log Collection by `rsync`




               Burst of traffic
               rsync consumes
               all bandwidth



                                                             18
Tuesday, July 17, 2012
Typical Log Collection by `rsync`
                     App server              App server              App server

                   Application              Application            Application


               File File File ...          File File File ...     File File File ...


                                    File
               Burst of traffic                                 High latency
               rsync consumes                                   must wait for a day
               all bandwidth                 Log server         Hard to analyze
                                                                complex text parsers

                                                                                  18
Tuesday, July 17, 2012
Log Collection using Fluentd
                         Fluentd        Fluentd          Fluentd



                                                       Realtime!
                                   Fluentd   Fluentd




                                                                   19
Tuesday, July 17, 2012
Log Collection using Fluentd
                         Fluentd        Fluentd          Fluentd



                                                       Realtime!
                                   Fluentd   Fluentd



                                              Amazon     Ready to
                         Hadoop    Mongo
                                               S3 /
                          / Hive    DB
                                               EMR       Analyze!

                                                                    19
Tuesday, July 17, 2012
Fluentd Case Study
               Ruby on Rails              Ruby on Rails          Ruby on Rails


                         Fluentd              Fluentd               Fluentd




      ✓    127 RoR servers
      ✓    100,000 msgs/sec             Fluentd    Fluentd      routing
      ✓    120Mbps at peak
      ✓    1TB/day

                                      Hadoop            Mongo     User behavior
                           PV logs     / Hive            DB       logs

                                                                                 20
Tuesday, July 17, 2012
http://fluentd.org/




                                              11
Tuesday, July 17, 2012
Thanks!

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Fluentd: the missing log collector

  • 1. Fluentd: the missing log collector Kiyoto Tamura
  • 2. Sorry about the corporate chrome! I am a Keynote n00b. Recycling my CTO’s slides. Thanks Melissa O’Neill@Harvey Mudd for “PDF to Keynote”. Saved my life. 2
  • 3. It's like syslogd, but uses JSON for log messages 8 Tuesday, July 17, 2012
  • 4. Logging in JSON? Why? • Machine-readable: More and more logs are getting consumed by machines, not homo sapiens. You want some structure... • Schema-free: but not too much structure. Data evolve fast and you need to adapt quickly. 4
  • 5. Logs As TEXT Logs As JSON + Field Name + No Custom Parser + Type Information + Schema Free 10 Tuesday, July 17, 2012
  • 6. Logs As TEXT “2011-04-01 host1 myapp: cmessage size=12MB user=me” Logs As JSON 2011-04-01 myapp.message { “on_host”: ”host1”, ”combined”: true, “size”: 12000000, + Field Name “user”: “me” + No Custom Parser + Type Information } + Schema Free 10 Tuesday, July 17, 2012
  • 8. Fluentd: Log Format Application Fluentd Storage 14 Tuesday, July 17, 2012
  • 9. Fluentd: Log Format Application 2012-02-04 01:33:51 myapp.buylog { Fluentd “user”: ”me”, “path”: “/buyItem”, “price”: 150, “referer”: “/landing” Storage } 14 Tuesday, July 17, 2012
  • 10. Fluentd: Log Format time Application tag 2012-02-04 01:33:51 myapp.buylog { Fluentd “user”: ”me”, “path”: “/buyItem”, “price”: 150, “referer”: “/landing” Storage } record 14 Tuesday, July 17, 2012
  • 11. Fluentd: Plugins Application filter / buffer / Fluentd routing Storage 15 Tuesday, July 17, 2012
  • 12. Fluentd: Plugins Application filter / buffer / Fluentd routing SaaS Storage Fluentd Plug-in Plug-in Plug-in 16 Tuesday, July 17, 2012
  • 13. Fluentd: Plugins syslogd Scribe Application File Plug-in tail Plug-in Plug-in filter / buffer / Fluentd routing SaaS Storage Fluentd Plug-in Plug-in Plug-in 16 Tuesday, July 17, 2012
  • 14. Client libraries > Ruby > Perl Application Buffering > PHP HTTP / TCP / UDS > Python > Java Fluentd > ... 17 Tuesday, July 17, 2012
  • 15. Client libraries > Ruby > Perl Application Buffering > PHP HTTP / TCP / UDS > Python > Java Fluentd > ... Fluent.open(“myapp”) Fluent.event(“login”, {“user”=>38}) #=> 2012-02-04 04:56:01 myapp.login {“user”:38} 17 Tuesday, July 17, 2012
  • 16. Typical Log Collection by `rsync` Burst of traffic rsync consumes all bandwidth 18 Tuesday, July 17, 2012
  • 17. Typical Log Collection by `rsync` App server App server App server Application Application Application File File File ... File File File ... File File File ... File Burst of traffic High latency rsync consumes must wait for a day all bandwidth Log server Hard to analyze complex text parsers 18 Tuesday, July 17, 2012
  • 18. Log Collection using Fluentd Fluentd Fluentd Fluentd Realtime! Fluentd Fluentd 19 Tuesday, July 17, 2012
  • 19. Log Collection using Fluentd Fluentd Fluentd Fluentd Realtime! Fluentd Fluentd Amazon Ready to Hadoop Mongo S3 / / Hive DB EMR Analyze! 19 Tuesday, July 17, 2012
  • 20. Fluentd Case Study Ruby on Rails Ruby on Rails Ruby on Rails Fluentd Fluentd Fluentd ✓ 127 RoR servers ✓ 100,000 msgs/sec Fluentd Fluentd routing ✓ 120Mbps at peak ✓ 1TB/day Hadoop Mongo User behavior PV logs / Hive DB logs 20 Tuesday, July 17, 2012
  • 21. http://fluentd.org/ 11 Tuesday, July 17, 2012

Editor's Notes