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Next Level DevOps By Ole Michaelis

Preliminary Consideration

• infrastructure is created by feature (but without clean up or cleaning things up)
• did a practical training round in admin team for half a year

What Is DevOps?

• you build it, you run it (until it goes offline)
• monitor it, automate it, measure/metering it
• build small tools and services to form an api

How Became A DevOp?

• extend your development skills
• learn and do refactoring
• learn the shell
• learn the operation system
• pull deployment with deployment hooks

Softwarearchitecture Of A Modern Onlinegame By Tobias Rojahn

Preliminary Consideration/Requirements

• crossplattform (mobile and web)
• realtime game (fast information about status changes)
• multiplayer (user can influence each other)

Architecture

• user (request websocket from web server)
• NodeJS (handles websocket connection to redis and global redis)
• redis (message queue with push and pull)
• php worker (long living php process, asks webservices or database, are forkable by using php forking mechanism)
• if something is calculated by the php worker, the message is pushed in the global redis

The PHP Worker

• long living workers
• worker is observing the queue (and event handling) and is pushing the message to the dispatcher
• each message has a type to push to the right controller
• dispatcher is using the right controller (with a bunch of internal to external mapping and nearly zero logic)
• controller is pushing the message to the right domain service (using the right domain objects and/or repositories)
• controller is working with multiple db views
• domain service can also call the event dispatcher to trigger other systems (not core systems)

Deamon

• only creates messages
• just time controlled game events

Cronjob

• only creates messages

NodeJS

• socket (via socket io) replaces session
• add additional data (with indexes to gain speed) to the socket (via message queues from php)
• node to php: send all data
• php to node: a combination of data to all connected sockets
• forwarding of fitting messages (with removing of internal datas)

Testing

• API-Tests
  • description
  • ingoing message (test data)
  • outgoing message (expectations)
• based on fitrues
• only php layer
• rollback on each test