Writing Tools in Go For Ops Engineers

https://github.com/yuuki1/droot https://github.com/yuuki1/grabeni https://github.com/yuuki1/gokc https://github.com/mackerelio/mkr

Transcript

1. Writing Tools in Go For Ops Engineers Go 1.6 Release Party
2. @y_uuk1 id:y_uuki Web Operations Engineer @Hatena
3. About 2.5 years since I met Go
4. My ops tools in Go • yuuki1/droot • yuuki1/grabeni • yuuki1/gokc • mackerelio/mkr
5. Ready for production use
6. mkr Command Line Tool for Mackerel API
7. mkr • For programable server operations with Mackerel • JSON output (Enable to parse with jq) • Depends on mackerelio/mackerel- client-go • More useful on server (No need to pass an API Key)
8. Grabeni An ops-friendly AWS Elastic Network Interface (ENI) attachment grabbing tool.
9. Grabeni • Help a failover tool (Keepalived/ MHA) switch a VIP • Depends on aws/aws-sdk-go • AWS API Retry/Max Attempts HSBCFOJ
   HSBC
   FOJYYYYYYYYY
10. Droot A super-easy application container engine with chroot without docker.
11. IUUQZVVLJIBUFOBCMPHDPNFOUSZESPPU
12. Droot • chroot an extracted archive from Docker images • Pull an archive from AWS S3 • Atomic deploy with symlink and rename(2) • `docker export | s3 upload` by io.Pipe()
13. gokc Yet Another Keepalived Syntax Checker in Golang.
14. IUUQZVVLJIBUFOBCMPHDPNFOUSZHPLD
15. gokc • Keepalived (well known with LVS) • Replace maoe/kc written in Haskell (Parser combinator) • Parser with yacc • Lexer with goroutine and channel
16. I believe Go is a good solution for ops engineers
17. Pros of Golang for ops engineer
18. 1 Easy Distribution
19. Easy Distribution • One Binary • Escaping Dependency Problem
20. Why is “One binary” so important ?
21. • 1500+α Hosts • 500+α Roles • Services continued 15 years • Many Old OSs … Hatena
22. 2 Quick development on Server
23. Quick Development on Server • GOOS=linux GOARCH=amd64 (or build on Docker) • scp ./binary [remote server] • ./binary
24. Quick Development on Server • One binary & Cross compile • My ops tools aim to run on Linux servers. • ex. droot runs on Linux only
25. 3 Quick deployment as a result
26. • Not mean that coding is just quick • Mean that no hesitation about coding because Go has the simple language specification Quick deployment
27. Others • Concurrency by goroutine • `io.Pipe()` • Fast runtime rather than LL • Error handing by returning error type • `defer` statement • Easy to clear temp resources on failure
28. Summary • Pros of Go for ops engineers • Easy binary distribution • Quick development on server • Quick deployment as a result