2019 - COSCUP - 復活一個 Browser Game - Unlight 開源事件

Transcript

1. Revive a Browser Game Server
   The Open Unlight Project
   Photo by Artem Labunsky on Unsplash
   

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2. WEB DEVELOPER
   GAME DEVELOPER
   ૵
   ࣌
   ݭ໵
   @elct9620
   

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5. Ruby + ActionScript 3
   

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7. Adobe Flash IDE is unavailable!
   

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8. mxmlc src/Unlight.mxml
   

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9. Unlight can be compiled
   by Flex SDK 3.x
   

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10. Failed because missing files
    

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12. Setup environment takes much time
    

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13. The source code always become dirty
    

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15. •Always reset client compile environment
    •Patches / Rework
    •Customizable Server/Client
    •Adjustable Docker compose configure
    

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17. Secure Remote Password
    not matched!
    

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19. http://srp.stanford.edu/design.html
    

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20. http://srp.stanford.edu/design.html
    Step 1. Client create PublicKey A
    

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21. http://srp.stanford.edu/design.html
    Step 2. Server create PublicKey B and send it with Salt to user
    

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22. http://srp.stanford.edu/design.html
    Step 3~. Compute SessionKey and verify other's Matcher
    

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33. (／‵Д′)／~ ╧╧
    

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36. 24 Core CPU
    24G RAM
    98K IOPS SSD
    300M/100M FTTH
    Sponsor by Poka
    

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37. Feel "LAG" after 500 online
    players
    

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40. (0.214518s)
    SELECT *
    FROM `card_inventories`
    WHERE (
    `card_inventories`.
    `chara_card_deck_id` = 2971)
    

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41. src/model/card_inventory.rb
    

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43. ALTER TABLE
    card_inventories
    ADD INDEX
    chara_card_deck_id
    (chara_card_deck_id)
    

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45. About 100x faster
    

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47. About 1000 online players
    without "LAG"
    

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48. •Adjust Cpuset to fix database on specify cores
    •Adjust Swappiness to prevent use disk
    •Adjust Full Table Index to cache small table
    

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49. •Move Database outside Docker
    •Enable SR-IOV to use physics network card
    •Add partition to database
    

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50. Estimate capability > 3000
    online players
    

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51. •DAU about 500 online players
    •Rows grow fast

    Only two weeks we have 10M ~ 20M rows
    •1 Developer

    1 DevOps

    1 Player Support
    

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52. But how to hosting this game?
    

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53. Add CloudWatch to analytic online players
    

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54. Open Unlight's
    Reword/Customize
    

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57. Open Unlight's
    Allow add customize gems
    

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58. Tricks to allow Docker add optional files
    

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59. customize/server/src/authentication.rb
    

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60. customize/server/src/payment.ru
    

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62. Use Rack to implement
    API server
    

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64. Extend CLI to serve in docker
    

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67. Hosting a game have to support
    players resolve problems
    

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68. SmartLook can replay player session to debug
    

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69. ZenDesk can help players in one central system
    

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70. •ZenDesk - Player support
    •SmartLook - Client Debug (for HTML5)
    •Asana - Issue Tracking
    •AWS - CDN/Monitoring
    •Discord - Co-working
    

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71. The HTML5 version?
    

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72. Flash will be removed
    at 2020 in Chrome
    

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73. The Unlight client is Flash
    

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74. But no one knows CPA will
    maintenance or not
    

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75. From TCPSocket to WebSocket
    

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76. Client Server
    Packet
    The TCPSocket send packet directly
    

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77. Client Server
    Packet
    The WebSocket send packet with WebSocket wrapper
    WebSocket
    

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78. Unlight use EventMachine
    handles connection
    

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79. Comment out all EventMachine connection
    

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80. Implement a Rack middleware with WebSocket gem
    

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81. Add Rack's .ru and it can be served by Puma or Unicorn
    

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82. We already
    migrated 90% server to
    WebSocket
    

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83. How the client communicates
    with the server?
    

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84. It convert data to a command
    

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85. Each packet should have a header to describe command
    

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86. JavaScript can create 2 byte
    struct?
    

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87. new Int8Array([0x00, 0x03, 0x00, 0x01,
    0x00, 0x0a])
    

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88. (／‵Д′)／~ ╧╧
    

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89. You can learn how
    the C programmer think
    by Unlight's Ruby source code
    

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90. From Golang to WebAssembly
    

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91. func AuthCmd(name string) []byte {
    buffer := new(bytes.Buffer)
    binary.Write(buffer, binary.BigEndian, uint16(1))
    binary.Write(buffer, binary.BigEndian,
    []byte(name))
    return buffer.Bytes()
    }
    

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92. GOOS=js GOARCH=wasm
    go build -o libul.go
    

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93. Convert Unlight to
    HTML5 is possible!
    

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94. What the next?
    

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95. Test! Test! Test!
    

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96. We are trying to learn to host a
    game server as a programmer
    

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97. And last ...
    

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98. New security problem is coming!
    

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99. Thanks
    

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