fluentd and embulk game server 4
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Masahiro NakagawaApr 18, 2015
Game Server meetup #4
Fluentd / EmbulkFor reliable transfer
Who are you?
> Masahiro Nakagawa > github/twitter: @repeatedly
> Treasure Data, Inc. > Senior Software Engineer > Fluentd / td-agent developer
> Living at OSS :) > D language - Phobos committer > Fluentd - Main maintainer > MessagePack / RPC - D and Python (only RPC) > The organizer of several meetups (Presto, DTM, etc…) > etc…
Structured logging !
Reliable forwarding !
Pluggable architecture
http://fluentd.org/
What’s Fluentd?
> Data collector for unified logging layer > Streaming data transfer based on JSON > Written in Ruby
> Gem based various plugins > http://www.fluentd.org/plugins
> Working in production > http://www.fluentd.org/testimonials
Background
Data Analytics Flow
Collect Store Process Visualize
Data source
Reporting
Monitoring
Data Analytics Flow
Store Process
Cloudera
Horton Works
Treasure Data
Collect Visualize
Tableau
Excel
R
easier & shorter time
???
TD Service Architecture
Time to Value
Send query result Result Push
Acquire Analyze Store
Plazma DB Flexible, Scalable, Columnar Storage
Web Log
App Log
Censor
CRM
ERP
RDBMS
Treasure Agent(Server) SDK(JS, Android, iOS, Unity)
Streaming Collector
Batch / Reliability
Ad-hoc /Low latency
KPI$
KPI Dashboard
BI Tools
Other Products
RDBMS, Google Docs, AWS S3, FTP Server, etc.
Metric Insights
Tableau, Motion Board�����etc.
POS
REST API ODBC / JDBC �SQL, Pig�
Bulk Uploader
Embulk,TD Toolbelt
SQL-based query
@AWS or @IDCF
Connectivity
Economy & Flexibility Simple & Supported
Dive into Concept
Divide & Conquer & Retry
error retry
error retry retry
retryBatch
Stream
Other stream
Application
･･･
Server2
Application
･･･
Server3
Application
･･･
Server1
FluentLog Server
High Latency!must wait for a day...
Before…
Application
･･･
Server2
Application
･･･
Server3
Application
･･･
Server1
Fluentd Fluentd Fluentd
Fluentd Fluentd
In streaming!
After…
Why JSON / MessagePack? (1
> Schema on Write (Traditional MPP DB) > Writing data using schema for improving
query performance
> Pros > minimum query overhead
> Cons
> Need to design schema and workload before
> Data load is expensive operation
Why JSON / MessagePack? (2
> Schema on Read (Hadoop) > Writing data without schema and map schema
at query time
> Pros > Robust over schema and workload change > Data load is cheap operation
> Cons
> High overhead at query time
Features
Core Plugins
> Divide & Conquer
> Buffering & Retrying
> Error handling
> Message routing
> Parallelism
> Read / receive data > Parse data > Filter data > Buffer data > Format data > Write / send data
Core Plugins
> Divide & Conquer
> Buffering & Retrying
> Error handling
> Message routing
> Parallelism
> Read / receive data > Parse data > Filter data > Buffer data > Format data > Write / send data
Common Concerns
Use Case Specific
> default second unit
> from data source
Event structure(log message)
✓ Time
> for message routing
> where is from?
✓ Tag
> JSON format
> MessagePackinternally
> schema-free
✓ Record
Architecture (v0.12 or later)
EngineInput
Filter Output
Buffer
> grep > record_transfomer > …
> Forward > File tail > ...
> Forward > File > ...
Output
> File > Memory
not pluggable
FormatterParser
Configuration and operation
> No central / master node > @include helps configuration sharing
> Operation depends on your environment > Use your deamon / deploy tools > Use Chef in Treasure Data
> Apache like syntax
How to use
Setup fluentd (e.g. Ubuntu)
$ apt-get install ruby!
!
$ gem install fluentd!
!
$ edit fluent.conf!
!
$ fluentd -c fluent.conf
http://docs.fluentd.org/articles/faq#w-what-version-of-ruby-does-fluentd-support
Treasure Agent (td-agent)
> Treasure Data distribution of Fluentd > include ruby, popular plugins and etc
> Treasure Agent 2 is current stable > Recommend to use v2, not v1 > rpm, deb and dmg
> Latest version is 2.2.0 with fluentd v0.12
Setup td-agent
$ curl -L http://toolbelt.treasuredata.com/sh/install-redhat-td-agent2.sh | sh!
!
$ edit /etc/td-agent/td-agent.conf!
!
$ sudo service td-agent start
See: http://docs.fluentd.org/categories/installation
Apache to Mongo
tail
insert
event buffering routing
127.0.0.1 - - [11/Dec/2014:07:26:27] "GET / ... 127.0.0.1 - - [11/Dec/2014:07:26:30] "GET / ... 127.0.0.1 - - [11/Dec/2014:07:26:32] "GET / ... 127.0.0.1 - - [11/Dec/2014:07:26:40] "GET / ... 127.0.0.1 - - [11/Dec/2014:07:27:01] "GET / ...
...
Fluentd
Web Server
2014-02-04 01:33:51 apache.log
{ "host": "127.0.0.1", "method": "GET", ... }
Plugins - use rubygems
$ fluent-gem search -rd fluent-plugin!
!
$ fluent-gem search -rd fluent-mixin!
!
$ fluent-gem install fluent-plugin-mongoIn td-agent: /usr/sbin/td-agent-gem install fluent-plugin-mongo
# receive events via HTTP <source> @type http port 8888 </source> !# read logs from a file <source> @type tail path /var/log/httpd.log format apache tag apache.access </source> !# save access logs to MongoDB <match apache.access> @type mongo database apache collection log </match>
# save alerts to a file <match alert.**> @type file path /var/log/fluent/alerts </match> !# forward other logs to servers <match **> @type forward <server> host 192.168.0.11 weight 20 </server> <server> host 192.168.0.12 weight 60 </server> </match> !@include http://example.com/conf
> Apply filtering routine to event stream > No more tag tricks!
Filter
<match access.**> @type record_reformer tag reformed.${tag} </match> !<match reformed.**> @type growthforecast </match>
<filter access.**> @type record_transformer … </filter>
v0.10: v0.12:
<match access.**> @type growthforecast </match>
Before
After
or Embulk
Nagios
MongoDB
Hadoop
Alerting
Amazon S3
Analysis
Archiving
MySQL
Apache
Frontend
Access logs
syslogd
App logs
System logs
Backend
Databasesbuffering / processing / routing
M x N → M + N
Roadmap> v0.10 (old stable) > v0.12 (current stable)
> Filter / Label / At-least-once > v0.14 (spring - early summer, 2015)
> New plugin APIs, ServerEngine, Time… > v1 (summer - fall, 2015)
> Fix new features / APIs
https://github.com/fluent/fluentd/wiki/V1-Roadmap
Use-cases
Simple forwarding
# logs from a file<source> type tail path /var/log/httpd.log pos_file /tmp/pos_file format apache2 tag backend.apache</source>!# logs from client libraries<source> type forward port 24224</source>!
# store logs to MongoDB<match backend.*> type mongo database fluent collection test</match>
# Ruby!Fluent.open(“myapp”)!Fluent.event(“login”, {“user” => 38})!#=> 2014-12-11 07:56:01 myapp.login {“user”:38}
> Ruby > Java > Perl > PHP > Python > D > Scala > ...
Client libraries
Less Simple Forwarding
- At-most-once / At-least-once - HA (failover) - Load-balancing
All data
Near realtime and batch combo!
Hot data
# logs from a file<source> type tail path /var/log/httpd.log pos_file /tmp/pos_file format apache2 tag web.access</source>!# logs from client libraries<source> type forward port 24224</source>!
# store logs to ES and HDFS<match web.*> type copy <store> type elasticsearch logstash_format true </store> <store> type webhdfs host namenode port 50070 path /path/on/hdfs/ </store></match>
CEP for Stream Processing
Norikra is a SQL based CEP engine: http://norikra.github.io/
Container Logging
> Kubernetes
!
!
!
!
!
> Google Compute Engine > https://cloud.google.com/logging/docs/install/compute_install
Fluentd on Kubernetes / GCE
Treasure Data
FrontendJob Queue
WorkerHadoop
Presto
Fluentd
Applications push metrics to Fluentd (via local Fluentd)
Datadogfor realtime monitoring
Treasure Datafor historical analysis
Fluentd sums up data minutes(partial aggregation)
hundreds of app servers
sends event logs
sends event logs
sends event logs
Rails app td-agent
td-agent
td-agent
GoogleSpreadsheet
Treasure Data
MySQL
Logs are available
after several mins.
Daily/Hourly
Batch
KPI
visualizationFeedback rankings
Rails app
Rails app
✓ Unlimited scalability✓ Flexible schema✓ Realtime✓ Less performance impact
Cookpad
✓ Over 100 RoR servers (2012/2/4)
Slideshare
http://engineering.slideshare.net/2014/04/skynet-project-monitor-scale-and-auto-heal-a-system-in-the-cloud/
Log Analysis System And its designs in LINE Corp. 2014 early
Line BusinessConnect
http://developers.linecorp.com/blog/?p=3386
Eco-system
fluent-bit> Made for Embedded Linux
> OpenEmbedded & Yocto Project > Intel Edison, RasPi & Beagle Black boards > https://github.com/fluent/fluent-bit
> Standalone application or Library mode > Built-in plugins
> input: cpu, kmsg, output: fluentd > First release at the end of Mar 2015
fluentd-forwarder> Forwarding agent written in Go
> Focusing log forwarding to Fluentd > Work on Windows
> Bundle TCP input/output and TD output > No flexible plugin mechanizm > We have a plan to add some input/output
> Similar product > fluent-agent-lite, fluent-agent-hydra, ik
fluentd-ui
> Manage Fluentd instance via Web UI > https://github.com/fluent/fluentd-ui
The problems at Treasure Data> Treasure Data Service on the Cloud > Customers want to try Treasure Data, but
> SEs write scripts to bulk load their data. Hard work :(
> Customers want to migrate their big data, but > Hard work :(
> Fluentd solved streaming data collection, but > bulk data loading is another problem.
Embulk
> Bulk Loader version of Fluentd > Pluggable architecture
> JRuby, JVM languages > High performance parallel processing
> Share your script as a plugin > https://github.com/embulk
The problems of bulk load
> Data cleaning (normalization) > How to normalize broken records?
> Error handling > How to remove broken records?
> Idempotent retrying > How to retry without duplicated loading?
> Performance optimization
HDFS
MySQL
Amazon S3
Embulk
CSV Files
SequenceFile
Salesforce.com
Elasticsearch
Cassandra
Hive
Redis
✓ Parallel execution ✓ Data validation ✓ Error recovery ✓ Deterministic behaviour ✓ Idempotent retrying
Plugins Plugins
bulk load
http://www.embulk.org/plugins/
How to use
Setup embulk (e.g. Linux/Mac)
$ curl --create-dirs -o ~/.embulk/bin/embulk -L “http://dl.embulk.org/embulk-latest.jar"!
!
$ chmod +x ~/.embulk/bin/embulk!
!
$ echo 'export PATH="$HOME/.embulk/bin:$PATH"' >> ~/.bashrc!
!
$ source ~/.bashrc
Try example
$ embulk example ./try1!
!
$ embulk guess ./example.yml -o config.yml!
!
$ embulk preview config.yml!
!
$ embulk run config.yml
# install $ wget http://dl.embulk.org/embulk-latest.jar -O
embulk.jar $ chmod 755 embulk.jar!
# guess $ vi example.yml $ ./embulk guess example.yml
-o config.yml
Guess format & schema in: type: file path_prefix: /path/to/sample_ out: type: stdout
in: type: file path_prefix: /path/to/sample_ decoders: - {type: gzip} parser: charset: UTF-8 newline: CRLF type: csv delimiter: ',' quote: '"' skip_header_lines: 1 columns: - {name: id, type: long} - {name: account, type: long} - {name: time, type: timestamp, format: '%Y-%m-%d %H:%M:%S’} - {name: purchase, type: timestamp, format: ‘%Y%m%d'} - {name: comment, type: string} out: type: stdout
guess
by guess plugins
# install $ wget http://dl.embulk.org/embulk-latest.jar -O
embulk.jar $ chmod 755 embulk.jar!
# guess $ vi example.yml $ ./embulk guess example.yml
-o config.yml!
# preview $ ./embulk preview config.yml $ vi config.yml # if necessary
+--------------------------------------+---------------+--------------------+ | time:timestamp | uid:long | word:string | +--------------------------------------+---------------+--------------------+ | 2015-01-27 19:23:49 UTC | 32,864 | embulk | | 2015-01-27 19:01:23 UTC | 14,824 | jruby | | 2015-01-28 02:20:02 UTC | 27,559 | plugin | | 2015-01-29 11:54:36 UTC | 11,270 | fluentd | +--------------------------------------+---------------+--------------------+
Preview & fix config
# install $ wget http://dl.embulk.org/embulk-latest.jar -O
embulk.jar $ chmod 755 embulk.jar!
# guess $ vi example.yml $ ./embulk guess example.yml
-o config.yml!
# preview $ ./embulk preview config.yml $ vi config.yml # if necessary !# run $ ./embulk run config.yml -o config.yml
exec: {} in: type: file path_prefix: /path/to/sample_ decoders: - {type: gzip} parser: charset: UTF-8 newline: CRLF type: csv delimiter: ',' quote: '"' skip_header_lines: 1 columns: - {name: id, type: long} - {name: account, type: long} - {name: time, type: timestamp, format: '%Y-%m-%d %H:%M:%S’} - {name: purchase, type: timestamp, format: ‘%Y%m%d'} - {name: comment, type: string} last_path: /path/to/sample_001.csv.gz out: type: stdout
Deterministic run
exec: {} in: type: file path_prefix: /path/to/sample_ decoders: - {type: gzip} parser: charset: UTF-8 newline: CRLF type: csv delimiter: ',' quote: '"' skip_header_lines: 1 columns: - {name: id, type: long} - {name: account, type: long} - {name: time, type: timestamp, format: '%Y-%m-%d %H:%M:%S’} - {name: purchase, type: timestamp, format: ‘%Y%m%d'} - {name: comment, type: string} last_path: /path/to/sample_01.csv.gz out: type: stdout
Repeat
# install $ wget http://dl.embulk.org/embulk-latest.jar -O
embulk.jar $ chmod 755 embulk.jar!
# guess $ vi example.yml $ ./embulk guess example.yml
-o config.yml!
# preview $ ./embulk preview config.yml $ vi config.yml # if necessary !# run $ ./embulk run config.yml -o config.yml !# repeat $ ./embulk run config.yml -o config.yml $ ./embulk run config.yml -o config.yml
Use-cases
Quipper from GDS slide
Other cases
> Treasure Data > Embulk worker for automatic import
> Web services > Send existing logs to Elasticsearch
> Business / Batch systems > Database to Database
> etc…
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