Go Features and Case Studies

Transcript

1. Go言語の可能性と開発事例 QCon Tokyo 2015
2. Ian Lewis Developer Advocate Google Cloud Platform google.com/+IanLewis-hoge @IanMLewis
3. Go! Image © Takuya Ueda. Licensed under CC BY 3.0.
4. Image © Renée French. Licensed under CC BY 3.0. Go(lang) • Developed at Google • Created to address problems: ◦ Speed of Software Development ◦ Cumbersome Type Systems ◦ Multiple Cores/Concurrency
5. Features Image © Takuya Ueda. Licensed under CC BY 3.0.
6. Image © Renée French. Licensed under CC BY 3.0. Features • Compiles to static binary native code • Garbage collector • Strongly typed (types inferred) • Goroutines • Channels • Structs/Interfaces
7. Static Binary
8. Image © Renée French. Licensed under CC BY 3.0. Static Binary • All Code Needed is Bundled • Avoids Problems with Linking at Runtime • Allows for *very* simple deployment
9. Garbage Collection Image © Takuya Ueda. Licensed under CC BY 3.0.
10. Image © Renée French. Licensed under CC BY 3.0. Garbage Collection • Mark and Sweep in 1.1 • Concurrent Mark and Sweep • Hybrid Mark and Sweep/Concurrent in 1.4 • Concurrent Garbage Collector in 1.5
11. Type Inference Image © Takuya Ueda. Licensed under CC BY 3.0.
12. Image © Renée French. Licensed under CC BY 3.0. Type Inference int hoge = 123; // NO!! int fuga = MyFunc(); hoge := 123; // GOOD!! fuga := MyFunc();
13. Goroutines Image © Takuya Ueda. Licensed under CC BY 3.0.
14. Image © Renée French. Licensed under CC BY 3.0. Goroutines • Concurrent Function • Light Weight Process • Runs on Multiple Cores • Easy to Write
15. Image © Renée French. Licensed under CC BY 3.0. Goroutines func MyFunc() { resp, err := http.Get("http://google.com/") } go MyFunc() // Concurrent!!!
16. Image © Renée French. Licensed under CC BY 3.0. Goroutines func main() { go MyFunc() // NONO!! // Program will exit to early }
17. Channels Image © Takuya Ueda. Licensed under CC BY 3.0.
18. Image © Renée French. Licensed under CC BY 3.0. Channels • Like a Queue • Used to Communicate Between Goroutines • Allows for Blocking Operations
19. Image © Renée French. Licensed under CC BY 3.0. Channels func MyFunc(done chan int) { resp, err := http.Get("http://google.com/") done <- 1 }
20. Image © Renée French. Licensed under CC BY 3.0. Channels func main() { done := make(chan int) go MyFunc(done) <-done // GOOD!!! }
21. Interfaces Image © Takuya Ueda. Licensed under CC BY 3.0.
22. Image © Renée French. Licensed under CC BY 3.0. Interfaces type Writer interface { Write(p []byte) (n int, err error) }
23. Image © Renée French. Licensed under CC BY 3.0. Interfaces type MyWriter struct {} func (w MyWriter) Write(p []byte) (n int, e error) { ... }
24. Examples Image © Takuya Ueda. Licensed under CC BY 3.0.
25. Vitess Image © Takuya Ueda. Licensed under CC BY 3.0.
26. Image © Renée French. Licensed under CC BY 3.0. Vitess • Used at Youtube • Sharding MySQL Servers • Serving all YouTube DB traffic since 2011 • http://vitess.io/
27. Image © Renée French. Licensed under CC BY 3.0.
28. Image © 2015 Google. Licensed under CC BY 4.0.
29. Docker Image © Takuya Ueda. Licensed under CC BY 3.0.
30. Image © Renée French. Licensed under CC BY 3.0. Docker • Container Engine • Includes HTTP API Server • Provides Image Packaging Format
31. Image © Renée French. Licensed under CC BY 3.0.
32. CoreOS Image © Takuya Ueda. Licensed under CC BY 3.0.
33. Image © Renée French. Licensed under CC BY 3.0. etcd • Distributed Key-Value Store • Used for Storing Cluster State/Config • Implements RAFT Protocol
34. Image © Renée French. Licensed under CC BY 3.0.
35. Image © Renée French. Licensed under CC BY 3.0. rocket • Container Runner • Supports Docker Containers • Supports Pods
36. Image © Renée French. Licensed under CC BY 3.0.
37. Kubernetes Image © Takuya Ueda. Licensed under CC BY 3.0.
38. Image © Renée French. Licensed under CC BY 3.0. Kubernetes • Container Cluster Manager • Manages a Distributed Cluster • Supports Pods • Provides HTTP API
39. Image © Renée French. Licensed under CC BY 3.0.
40. Join Us! Image © Takuya Ueda. Licensed under CC BY 3.0.
42. Image © Renée French. Licensed under CC BY 3.0. GoCon 2015 Summer • Biggest Go Event in Japan!! • 2015/06/20 (Sat) • Registration starts 2015/05/01
43. http://gocon.connpass.com/
44. Thank You! QCon Tokyo 2015 Ian Lewis Developer Advocate Google Cloud Platform google.com/+IanLewis-hoge @IanMLewis