본 게시물은 2019년 6월 18일에 AWS Game Team에서 진행한 GameLift 교육 자료입니다. GameLift는 클라우드에서 세션 기반 멀티플레이 게임 서버를 배포, 운영, 조정하는 데 사용되는 완전 관리형 서비스입니다. Amazon GameLift를 사용해 최고의 동급 전용 게임 서버 호스팅을 확보하십시오.

1. Amazon GameLift
Technical Overview
김성수 / 이정훈,
Solutions Architect, Gaming, AWS
2019
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What is Amazon GameLift?
Infrastructure Management
• Auto-scaling
• High-availability (Multi-AZ)
• Automatic x-region failover
• DDoS Protection
Session Management
• Player & Game sessions
• Worldwide placement
• Matchmaking (FlexMatch) Infrastructure$
Time
Auto scaling - More exacting
capacity
Infrastructure$
Time
Wasted $
Upfront expenditure – Scaling for peak
Auto scaling with Amazon GameLift
Traditional IT Provisioning

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Amazon GameLift
• Amazon GameLift service
• Game clients
• Game servers (fleet)
- Game session (server process)
• Game services
• External services
• Developer tools

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Amazon GameLift
Builds
FlexMatchFleets
Aliases Clients
Queues

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Builds Explained
• Upload via AWS CLI or SDK
• Store multiple builds
• Supported Operating Systems:
• Linux
• Windows
• Server SDKs:
• C++
• C#
• Unreal Plugin
• Lumberyard integration
Builds

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Build Dashboard
• Access key information about builds stored in Amazon
GameLift:
• Status
• Version
• OS
• Size
• Number of fleets using this build

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Fleets Explained
Fleets represent the deployed state of your
game build. They enable you to define how
your build should be hosted within Amazon
GameLift including:
• Instance Type
• Region
• Scaling Policies
• Capacity Limits
• Number of processes per instance
Fleets

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Fleet Metrics
• Game/Player Sessions
• Game Server Processes
• Number of Instances
• Instance Performance
• Scaling Limits

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Fleet Scaling Policies
Set multiple automatic scaling polices that match the demand for your game.
Policies can be configured to use the metrics available in GameLift such as:
• Target-based
- percent available game sessions
• Rule-based (CLI or SDK only)
- Player Sessions
- Game Sessions
- Instances
- Average Player Wait Time (Queue)
- Queue depth (Queue)

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Fleet Events
See events that take place in the fleet at the game session or instance level.
Events reported include:
• Scaling
• Information
• Warnings
• Errors
• Crashes

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Fleet – Game Sessions
Track running game sessions running in a fleet in real time.
Drill down to see player session information.

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Amazon GameLift Spot
• Prices adjust based on demand for
instance capacity
• GameLift managed spot fleet
selection via FleetIQ
• Linux and Windows instances
available
• Minimal risk of instance
termination which can be managed
via notification
Spot Fleets allow you to run your game servers in Amazon GameLift at a lower
hourly rate.

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Aliases Explained
Aliases allow you to redirect game clients to a fleet that
it specifies or to notify clients that a fleet is out of
service.
Move a build through different environment types for
example, Development, Test or Production.
There are two types of Alias available:
• Simple – A simple redirect points to an associated
fleet, the fleet an Alias resolves to can be updated
at any time
• Terminal – This does not resolve to a fleet, instead
it passes back a specified message back to the
client.
Aliases

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Aliases – Simple Redirect
New Players
Build A Fleet A Client
Developer
Alias

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Aliases – Simple Redirect
New Players
Build A Fleet A Client
Developer
Fleet BBuild B
Alias

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Aliases – Simple Redirect
Build A Fleet A Client
Fleet BBuild B
Alias
New PlayersDeveloper

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Aliases – Terminal Message
New Players
Build A Fleet A Client
Developer
Alias

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Aliases – Terminal Message
Build A Fleet A Client
Terminal
Message
Alias
New PlayersDeveloper

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Aliases – Terminal Message
Build A Fleet A Client
Terminal
Message
Alias
New PlayersDeveloper

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Queues Explained
Queues automate the process of efficiently
allocating new game sessions on any fleet in
a group.
Queues are configurable and allow you to
determine several options that are used
when Amazon GameLift places a session:
• Queue Timeout
• Member Fleets
• Fleet Priority
• Latency policies
Queues

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Queues – Member Fleets
• Place Fleets in AWS Regions close to
your Players for the best experience.
• 14 Commercial Regions supported by
Amazon GameLift.
• Region 15 (Paris) coming soon.
• Both Fleets and Aliases can be
configured for use by a Queue.
• Queues can combine on-demand and
spot instances from multiple regions.
Fleet (Virginia)
Fleet (Frankfurt)
Fleet (Singapore)
Queue

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Queues – Fleet Priority
• Prioritize your destinations (Fleets or
Aliases) to indicate the preferred fleet
order.
• Amazon GameLift uses the priority to
locate the best available session, starting
with the first priority and moving down.
• When using Spot Instances set this Fleet
to a higher priority, then set an On-
Demand Fleet below for cases where Spot
capacity is not available.
Fleet (Virginia)
Fleet (Frankfurt)
Fleet (Singapore)
Queue
1
2
3

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Queues – Player Latency Policies
• Set a maximum acceptable player
latency for new game sessions.
• Specify the amount of time to
enforce the policy.
• Multiple policies can be specified.
• If placing a group of Game Sessions
latencies are averaged.
Fleet (Virginia)
Fleet (Frankfurt)
Fleet (Singapore)
Queue
43
ms
20
ms
87
ms

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How FleetIQ Works
1. FleetIQ filters the queue's destinations to remove fleets with a
latency limit and unacceptable interruption rate’s spot fleet
2. FleetIQ re-orders the queue destinations by region, those with
lowest average player latency listed first if player latency data is
provided
3. If the destination list was prioritized by region, FleetIQ selects
the fleet in the lowest-latency region with the lowest price
4. If the destination list was not prioritized, FleetIQ selects the first
viable fleet from the original list, even if there are lower priced
spot fleets on the list.

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Clients Explained
Amazon GameLift supports any game
client or game service that is able to
make use of one of the AWS supported
SDKs, languages include:
• C++
• C#
• Go
• Python
• JavaScript/Node.js
• Java
Clients

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Clients – Best Practices
• Accept Client requests via a
central “Game Service”
• Integrate with Amazon
GameLift from the Game
Service to help isolate clients
from change
• Authenticate game clients
upon request to the Game
Service
• Capture latency information
from Clients by pinging AWS
endpoints
Group
Client
Client
Client
Client
Game
Service
Amazon
GameLift
Integrates
AWS SDK

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End to end – Multi Region Deployment
Group
Client
Client
Client
Client
Game
Service
Amazon
GameLift
Game
Session
Placement
Request
Fleet (Virginia)
Fleet (Frankfurt)
Fleet (Singapore)
Queue
Integrates
AWS SDK
Integrates Amazon GameLift
Server SDK

29. GameLift SDK Integration(1/2)

30. GameLift SDK Integration(2/2)

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FlexMatch Explained
FlexMatch
• Customizable Matching
• Player Group Support
• Latency-based Matching
• Rule Relaxing
• Match Accept
• Best Region Placement
• Player drop in/out support with
FlexMatch Backfill

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FlexMatch Analytics
• Success/Failure Rates
• Player Demand
• Time to Match
• Rule Effectiveness

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FlexMatch Analytics
• Success/Failure Rates
• Player Demand
• Time to Match
• Rule Effectiveness

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Amazon GameLift FlexMatch
Group
Client
Client
Client
Client
Fleet (Virginia)
Integrates
AWS SDK
Amazon
GameLift
FlexMatch
Rule
Set
Fleet (Frankfurt)
Fleet (Singapore)
Queue
Integrates Amazon GameLift
Server SDK
Game
Service

35. Amazon GameLift FlexMatch
1. Game Clients tell your Game Service
they want to play multiplayer
Group
Client
Client
Client
Client
Game
Service

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Amazon GameLift FlexMatch
Game
Service
Amazon
GameLift
FlexMatch
Rule
Set
2. Game Service makes a
StartMatchmaking request for one
player or a group of players.
• Unique Ticket Id
• Unique Player Ids
• Which Rule Set to use
• Custom player data, e.g. “skill”
StartMatchmaking

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Amazon GameLift FlexMatch
Game
Service
Amazon
GameLift
FlexMatch
Rule
Set
3. The StartMatchmaking request
gets a MatchmakingTicket in
response, status SEARCHING
• Ticket Id
• Status = SEARCHING
MatchmakingTicket

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Amazon GameLift FlexMatch
Amazon
GameLift
FlexMatch
Rule
Set
4. Game Service polls with a
DescribeMatchmaking Request.
• Ticket Ids
DescribeMatchmaking
Game
Service

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Amazon GameLift FlexMatch
Amazon
GameLift
FlexMatch
Rule
Set
5. The DescribeMatchmaking request
gets a MatchmakingTicket list in
response
• Ticket Id
• Status = PLACING
• List of Player Info
MatchmakingTicket
+
Game
Service

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Amazon
GameLift
FlexMatch
Rule
Set
Queue
6. The MatchmakingTicket status
changes to PLACING once a
match is made and players are
queued for a Amazon GameLift
server
• Ticket Id
• Status = PLACING
• List of Player Info
MatchmakingTicket
Amazon GameLift FlexMatch

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Fleet (Tokyo)
Queue
7. Queued matches are placed into
the Amazon GameLift Fleet with
the best latency.
• Ticket Id
• Status = COMPLETED
• List of Player Info
• Game Session Info
MatchmakingTicket
+
Amazon GameLift FlexMatch

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FlexMatch Rule Sets
Amazon
GameLift
FlexMatch
Rule
Sets

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Amazon
GameLift
FlexMatch
Rule
Set
• Unique Ticket Id
• Unique Player Ids
• Which Rule Set to use
• Custom player data, e.g. “skill”
StartMatchmaking
Game
Service
FlexMatch Rule Sets

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• Custom attributes
• Team definitions
• Matchmaking rules
• Expansions to relax rules
FlexMatch Rule Sets

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• Custom attributes
• Team definitions
• Matchmaking rules
• Expansions to relax rules
FlexMatch Rule Sets

46. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
Amazon
GameLift
FlexMatch
Rule
Set
• Unique Ticket Id
• Unique Player Ids
• Which Rule Set to use
• Custom player data, e.g. “skill”
StartMatchmaking
Game
Service
FlexMatch Rule Sets

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• Custom attributes
• Team definitions
• Matchmaking rules
• Expansions to relax rules
FlexMatch Rule Sets

48. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
• Custom attributes
• Team definitions
• Matchmaking rules
• Expansions to relax rules
FlexMatch Rule Sets

49. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
• Custom attributes
• Team definitions
• Matchmaking rules
• Expansions to relax rules
FlexMatch Rule Sets

50. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
• Custom attributes
• Team definitions
• Matchmaking rules
• Expansions to relax rules
FlexMatch Rule Sets

51. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
• Custom attributes
• Team definitions
• Matchmaking rules
• Expansions to relax rules
FlexMatch Rule Sets

52. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
• Custom attributes
• Team definitions
• Matchmaking rules
• Expansions to relax rules
FlexMatch Rule Sets

53. © 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.
• Custom attributes
• Team definitions
• Matchmaking rules
• Expansions to relax rules
FlexMatch Rule Sets

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FlexMatch Backfill
• Use same custom rule sets for Backfill
matches
• 1 or more slots can be filled with a single
request
• Quickly start sessions by starting a
match with the minimum number of
players and adding more as they are
found
FlexMatch Backfill can find players to join a game session that is
already in progress. This is useful for games that have players
drop in/out of a session.

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Client
Client
Client
Client
Fleet (Oregon)
Fleet (London)
Fleet (Tokyo)
Amazon
GameLift
FlexMatch
Rule
Set
Queue
Game
Service
New
Client
Game
Session
BackFill
Request
FlexMatch Backfill

56. Architecture Overview
오늘 구축해 볼 게임 서비스

57. 오목 PvP 게임

58. 최종 아키텍처

59. Hands-on Labs
Step by Step

60. Step 1: DynamoDB, ElastiCache, SQS
DynamoDB Table
• 플레이어 정보 테이블
• PlayerName, Password, ELO점수, 승패 카운트
ElastiCache – Redis
• 플레이어 ELO 점수기반 랭킹 저장
• Sorted Set 자료구조
SQS
• 게임 결과 정보 임시 저장용
• GameServer로부터 결과를 받아 DynamoDB에 반영하기
전까지 Queueing용

61. 아키텍처 Step 1

62. Step 2: Lambda, Lambda, Lambda
Game-Rank-Reader (Get Rank)
• ElastiCache로 부터 플레이어의 랭킹 정보를 읽는 함수
Game-Rank-Update (Scoring)
• DynamoDB 스트림으로부터 점수 업데이트 정보를 읽어서
Redis에 적재하는 함수
Game-SQS-Process (Game Result Processing)
• SQS에 있는 게임 결과 정보(ELO 점수)를 읽어서 DynamoDB
테이블에 반영하는 함수

63. 아키텍처 Step 2

64. Step 3: API-GW, S3 Static Website
Ranking Website
• 웹페이지를 통하여 플레이어들의 랭킹 정보를 확인할 수
있는 웹사이트 구축
• API-Gateway를 통하여 Game-Rank-Reader 람다 호출
• S3에 웹페이지를 위한 HTML 및 Javascript 저장
• S3의 Static website hosting 기능 사용
• Javascript에서 API-GW를 호출하여 랭킹정보 읽어옴

65. 아키텍처 Step 3

66. Step 4: GameLift, Matchmaking EC2
MatchMaker
• 매치메이킹 서버를 위해 EC2를 사용
• 플레이어 DynamoDB테이블 정보(ID/PW) 통한 간단 인증 수행
• 1:1 매치메이킹 및 GameLift에게 세션 요청 (Client API 호출)
• FlexMatch기능을 사용하면 EC2 대신 Lambda로 대체가능
GameLift에 게임 서버 통합
• 게임 서버 호스팅 및 스케일링
• GameLift Server SDK 연동된 서버 업로드 및 플릿 생성
• ALIAS 생성후 플릿과 연결
• MatchMaker는 ALIAS를 통해 플릿과 통신

67. Well Done

68. Play Test
클라이언트를 2개 실행
• 서로 다른 ID 설정 (config.ini)

69. Hands-on-Lab 실습용 Asset 다운로드
https://gameliftholkr.s3.ap-northeast-2.amazonaws.com/GameLiftHol.zip
Hands-on-Lab 가이드 문서
http://bit.ly/HOL-GameLift

70. Thank You
amazon.com/gamelift/
© 2018, Amazon Web Services, Inc. or its Affiliates. All rights reserved.