Golang Warsaw #56 Jakub Wołynko Secure access to EC2 (for developers) Agenda – introduction – EC2 in native environment – 3-tier architecture intro – alternative methods of resource connection: groups or equivalent 3-tier architecture3-tier architecture - props and cons – full control over resource access – possibilities of disconnection resources from the internet – in general, more secure – architecture getting more complex – additional costs like VPN, NatGateway – regular resource access become more annoying solution one - bastion host Host Instance ProxyJump Bastion PreferredAuthentications

which by design use hundreds of milliseconds of CPU time, far more than a typical network or disk access). A function can be blocking in some respects and non-blocking in others. In the context of Tornado support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded. – always return a Future of RequestHandler for all your specific handlers. Handling request input The request handler can access the object representing the current request with self.request. See the class definition for HTTPServerRequest

which by design use hundreds of milliseconds of CPU time, far more than a typical network or disk access). A function can be blocking in some respects and non-blocking in others. In the context of Tornado support integration with other packages including Twisted via a registry of conversion functions. To access this functionality in native coroutines, use tornado.gen.convert_yielded. always return a Future of RequestHandler for all your specific handlers. Handling request input The request handler can access the object representing the current request with self.request. See the class definition for HTTPServerRequest

19 Further Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 10 Control Flow 94 10.1 Compound Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Logical operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295 21.4 Control Flow and Short-Circuiting Operators . . . . . . . . . . . . . . . . . . . . . . 296 21.5 Arrays The dangers of abusing multiple dispatch (aka, more on types with values-as-parameters)459 35.13 Access arrays in memory order, along columns . . . . . . . . . . . . . . . . . . . . 460CONTENTS vii 35

19 Further Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 10 Control Flow 94 10.1 Compound Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Logical operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295 21.4 Control Flow and Short-Circuiting Operators . . . . . . . . . . . . . . . . . . . . . . 296 21.5 Arrays The dangers of abusing multiple dispatch (aka, more on types with values-as-parameters)459 35.13 Access arrays in memory order, along columns . . . . . . . . . . . . . . . . . . . . 460CONTENTS vii 35

19 Further Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 10 Control Flow 94 10.1 Compound Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Logical operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295 21.4 Control Flow and Short-Circuiting Operators . . . . . . . . . . . . . . . . . . . . . . 296 21.5 Arrays The dangers of abusing multiple dispatch (aka, more on types with values-as-parameters)459 35.13 Access arrays in memory order, along columns . . . . . . . . . . . . . . . . . . . . 460CONTENTS vii 35

19 Further Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 9 Control Flow 89 9.1 Compound Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Logical operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278 20.4 Control Flow and Short-Circuiting Operators . . . . . . . . . . . . . . . . . . . . . . 279 20.5 Arrays The dangers of abusing multiple dispatch (aka, more on types with values-as-parameters)430 34.13 Access arrays in memory order, along columns . . . . . . . . . . . . . . . . . . . . 431 34.14 Pre-allocating

19 Further Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 9 Control Flow 89 9.1 Compound Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Logical operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 278 20.4 Control Flow and Short-Circuiting Operators . . . . . . . . . . . . . . . . . . . . . . 279 20.5 Arrays The dangers of abusing multiple dispatch (aka, more on types with values-as-parameters)430 34.13 Access arrays in memory order, along columns . . . . . . . . . . . . . . . . . . . . 431 34.14 Pre-allocating

19 Further Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 10 Control Flow 94 10.1 Compound Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Logical operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298 21.4 Control Flow and Short-Circuiting Operators . . . . . . . . . . . . . . . . . . . . . . 299 21.5 Arrays . . . . . . . . . . . . . . . . . . . . . . 495 37.9 Prefer exported methods over direct field access . . . . . . . . . . . . . . . . . . . 495 37.10 Use naming conventions consistent with Julia base/

19 Further Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 10 Control Flow 94 10.1 Compound Expressions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Logical operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298 21.4 Control Flow and Short-Circuiting Operators . . . . . . . . . . . . . . . . . . . . . . 299 21.5 Arrays . . . . . . . . . . . . . . . . . . . . . . 496 37.8 Prefer exported methods over direct field access . . . . . . . . . . . . . . . . . . . 496 37.9 Use naming conventions consistent with Julia base/