Goサーバをあえて不安定にするパッケージを作った話

Go(Un)Conference（Goあんこ）LT大会 5kg

https://gounconference.connpass.com/event/112942/

Transcript

1. ©2018 Wantedly, Inc. GoαʔόΛෆ҆ఆʹ͢Δ ύοέʔδΛ࡞ͬͨ࿩ 31.Jan.2019 - Hazumi Ichijo
2. ©2018 Wantedly, Inc. ࣗݾ঺հ Ұᑍ
   ୺੅
   !IB[VNJSS!SFSPTU
   4FSWFS
   4JEF
   &OHJOFFS
   JO
   8BOUFEMZ
   (P
   3BJMT
   3FBDUʜ
   ग़਎
   ๺ւಓ
3. ©2018 Wantedly, Inc. མͪͯͯ΋ྑ͍αʔϏε ϝΠϯͷαʔϏε Ϣʔβʔ
4. ©2018 Wantedly, Inc. མͪͯͯ΋ྑ͍αʔϏε ϝΠϯͷαʔϏε Ϣʔβʔ མͪͯͯ΋ྑ͍αʔϏε ϝΠϯͷαʔϏε Ϣʔβʔ
5. ©2018 Wantedly, Inc. མͪͯͯ΋ྑ͍αʔϏε ϝΠϯͷαʔϏε Ϣʔβʔ མͪͯ΋Өڹ͕ग़ͳ͍Α͏ʹ͢ΔͨΊʹɺ $JSDVJU#SFBLFSͱ͍͏΋ͷ͕ଘࡏ͢Δ
    IUUQTHJUIVCDPNTPOZHPCSFBLFS
    IUUQTHJUIVCDPNSVCZJTUDJSDVJUCSFBLFS
6. ©2018 Wantedly, Inc. CircuitBreaker͕ຊ౰ʹ͏·͘ಈ͔͘ෆ҆ => ಈ͔͚ͩ͘γϡοͱ֬ೝ͍ͨ͠
7. ©2018 Wantedly, Inc.  Ͳ͏΍ͬͯෆ҆ఆʹ͢Δ͔
   w ίʔυ಺ʹQBOJDͱ͔ΛೖΕΔʁ
    Ͳ͏͍ͬͨৼΔ෣͍Λ͢Δ΂͖͔
   w ൪୆Λฦ͢ʁϨεϙϯεΛ஗͘͢Δʁ
8. ©2018 Wantedly, Inc. 
   Ͳ͏΍ͬͯෆ҆ఆʹ͢Δ͔ Ϣʔβʔ ϝΠϯͷαʔό͔Βݟ͑Δͷ͸ Ϩεϙϯε͚ͩ IUUQH31$
9. ©2018 Wantedly, Inc. 
   Ͳ͏΍ͬͯෆ҆ఆʹ͢Δ͔ Ϣʔβʔ ͚ͩ͜͜ʹෆ҆ఆ͞Λ͍ΕΕ͹͍͍
10. ©2018 Wantedly, Inc. 
    Ͳ͏΍ͬͯෆ҆ఆʹ͢Δ͔ Ϣʔβʔ H31$
    *OUFSDFQUPS
    IUUQ
    
    
    .JEEMFXBSF
11. ©2018 Wantedly, Inc. 
    Ͳ͏͍ͬͨৼΔ෣͍Λ͢΂͖͔ https://engineering.linkedin.com/blog/2018/05/linkedout--a-request-level-failure-injection-framework -JOLFEJOͷ'BJMVSF
    *OKFDUJPO
    'SBNFXPSL
    Ͱ͸
    w &SSPS
    w %FMBZ
    w 5JNFPVU
    ͷͭΛೖΕ͍ͯΔ
12. ©2018 Wantedly, Inc. 
    Ͳ͏͍ͬͨৼΔ෣͍Λ͢΂͖͔ https://engineering.linkedin.com/blog/2018/05/linkedout--a-request-level-failure-injection-framework -JOLFEJOͷ'BJMVSF
    *OKFDUJPO
    'SBNFXPSL
    Ͱ͸
    w &SSPS
    w %FMBZ
    w 5JNFPVU
    ͷͭΛೖΕ͍ͯΔ ͦͷ͏ͪɺ&SSPSɾ5JNFPVU͕͋Ε͹ࢼͤͦ͏ɻ
    ߋʹɺͦ͏͍ͬͨৼΔ෣͍͸ϥϯμϜʹى͖ΔΑ͏ʹ͍ͨ͠
    
    αʔϏεΛ6OJY
    5JNF͕/ͰׂΓ੾ΕΔͱ͖ΞϗʹͳΔΑ͏ʹ͢Ε͹ྑ͛͞
13. ©2018 Wantedly, Inc. 
    Ͳ͏͍ͬͨৼΔ෣͍Λ͢΂͖͔ { "interval": 1, "slow_response_option": { "enable": true, "time": 5 }, "server_error_option": { "enable": true } }
14. ©2018 Wantedly, Inc. ͦ͏͍ͬͨύοέʔδΛ࡞੒ͨ͠ https://github.com/rerost/unstable
15. ©2018 Wantedly, Inc. package main import ( "fmt" "net/http" "github.com/rerost/unstable/uhttp" ) func main() { http.Handle("/", uhttp.WithUnstable(handler)) if err := http.ListenAndServe(":3000", nil); err != nil { fmt.Println(err) } } func handler(w http.ResponseWriter, r *http.Request) { w.Write([]byte("Sample")) }
16. ©2018 Wantedly, Inc. package main import ( "context" "log" "net" "github.com/golang/protobuf/ptypes/empty" api_pb "github.com/rerost/unstable/example/grpc/server/api" "github.com/rerost/unstable/ugrpc" "google.golang.org/grpc" "google.golang.org/grpc/reflection" ) type server struct{} func (s *server) GetSample(ctx context.Context, req *empty.Empty) (*api_pb.GetSampleResponse, error) { return &api_pb.GetSampleResponse{Message: "Sample"}, nil } func main() { l, err := net.Listen("tcp", ":5000") if err != nil { log.Fatalf("Failed to listen: %v", err) } s := grpc.NewServer( grpc.UnaryInterceptor(ugrpc.UnstableUnaryServerInterceptor()), ) api_pb.RegisterSampleServiceServer(s, &server{}) reflection.Register(s) if err := s.Serve(l); err != nil { log.Fatalf("Failed to serve: %v", err) } }
17. ©2018 Wantedly, Inc. Demo
18. ©2018 Wantedly, Inc.  γϡοͱ'BVMU
    *OKFDUJPO͍ͨ͠ͱ͖ʹ͓͢͢Ί
     $IBPT
    &OHJOFFSJOH
    ͱ͔͸૝ఆ͍ͯ͠ͳ͍