Production Ready Go - Golang UK 2017

Transcript

7. HELLO! I’m Ian Kent I work @ONSdigital You can find me at @iankent
8. I’ve written some seriously bad code…
9. I’ve deployed some seriously bad code…
10. Some of that code is still in production
11. Production Ready Go
12. Some Go things
 (that I won’t be talking about) • fmt • vet • lint • test • -race • pprof • vendor • cover
13. Some not-Go things
 (that I also won’t be talking about) • logging • tracing • errors • retries
14. Deploying Go 
 to production 
 is too easy
16. 0.1ms 1.4ms
17. My mistakes • Client timeouts • Server timeouts • OS signals • Cancellation
18. Client
 timeouts
19. DefaultClient in net/http doesn’t time out
20. Server
 timeouts
21. ListenAndServe in net/http doesn’t time out
22. A bit more about HTTP servers in Go
23. OS signals
24. A brief overview of OS signals KILL Handled by OS, kills the process STOP, CONT Handled by OS, pauses/resumes the process QUIT Sent by Ctrl + \, core dumps INFO Sent by Ctrl + T, process info PIPE Failed write to file descriptor INT Sent by Ctrl + C TERM Sent by kill <pid>
25. Cancellation
26. Cancellation isn’t just for servers
27. Recap • Client timeouts • Server timeouts • OS signals • Cancellation https://bit.ly/production-ready-go
28. Never start a goroutine without knowing how it will stop - Dave Cheney https://bit.ly/dave-cheney-goroutine
29. Never consume resources without knowing how you will free them - Me
30. Further reading • CloudFlare - So you want to expose Go on the internet
 https://bit.ly/cloudflare-expose-go
 • CloudImmunity - 50 shades of Go
 https://bit.ly/cloudimmunity-50-shades-of-go
 • spf13 - 7 common mistakes in Go
 https://bit.ly/spf13-common-mistakes-in-go
31. Thank you