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Writing Tools in Go For Ops Engineers - Speaker Deck
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
Yuuki Tsubouchi (yuuk1)
February 18, 2016
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Transcript
-
My ops tools in Go • yuuki1/droot • yuuki1/grabeni •
yuuki1/gokc • mackerelio/mkr -
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) -
Grabeni • Help a failover tool (Keepalived/ MHA) switch a
VIP • Depends on aws/aws-sdk-go • AWS API Retry/Max Attempts HSBCFOJHSBCFOJYYYYYYYYY -
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() -
gokc • Keepalived (well known with LVS) • Replace maoe/kc
written in Haskell (Parser combinator) • Parser with yacc • Lexer with goroutine and channel -
• 1500+α Hosts • 500+α Roles • Services continued 15
years • Many Old OSs … Hatena -
Quick Development on Server • GOOS=linux GOARCH=amd64 (or build on
Docker) • scp ./binary [remote server] • ./binary -
Quick Development on Server • One binary & Cross compile
• My ops tools aim to run on Linux servers. • ex. droot runs on Linux only -
• Not mean that coding is just quick • Mean
that no hesitation about coding because Go has the simple language specification Quick deployment -
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 -
Summary • Pros of Go for ops engineers • Easy
binary distribution • Quick development on server • Quick deployment as a result
