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Goサーバをあえて不安定にするパッケージを作った話
Hazumi Ichijo
January 31, 2019
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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/
Hazumi Ichijo
January 31, 2019
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Transcript
©2018 Wantedly, Inc. GoαʔόΛෆ҆ఆʹ͢Δ ύοέʔδΛ࡞ͬͨ 31.Jan.2019 - Hazumi Ichijo
©2018 Wantedly, Inc. ࣗݾհ Ұᑍ!IB[VNJSS!SFSPTU 4FSWFS4JEF&OHJOFFSJO8BOUFEMZ (P 3BJMT 3FBDUʜ ग़ւಓ
©2018 Wantedly, Inc. མͪͯͯྑ͍αʔϏε ϝΠϯͷαʔϏε Ϣʔβʔ
©2018 Wantedly, Inc. མͪͯͯྑ͍αʔϏε ϝΠϯͷαʔϏε Ϣʔβʔ མͪͯͯྑ͍αʔϏε ϝΠϯͷαʔϏε Ϣʔβʔ
©2018 Wantedly, Inc. མͪͯͯྑ͍αʔϏε ϝΠϯͷαʔϏε Ϣʔβʔ མͪͯӨڹ͕ग़ͳ͍Α͏ʹ͢ΔͨΊʹɺ $JSDVJU#SFBLFSͱ͍͏ͷ͕ଘࡏ͢Δ IUUQTHJUIVCDPNTPOZHPCSFBLFS
IUUQTHJUIVCDPNSVCZJTUDJSDVJUCSFBLFS
©2018 Wantedly, Inc. CircuitBreaker͕ຊʹ͏·͘ಈ͔͘ෆ҆ => ಈ͔͚ͩ͘γϡοͱ֬ೝ͍ͨ͠
©2018 Wantedly, Inc. Ͳ͏ͬͯෆ҆ఆʹ͢Δ͔ w ίʔυʹQBOJDͱ͔ΛೖΕΔʁ Ͳ͏͍ͬͨৼΔ͍Λ͢Δ͖͔ w
൪Λฦ͢ʁϨεϙϯεΛ͘͢Δʁ
©2018 Wantedly, Inc. Ͳ͏ͬͯෆ҆ఆʹ͢Δ͔ Ϣʔβʔ ϝΠϯͷαʔό͔Βݟ͑Δͷ Ϩεϙϯε͚ͩ IUUQH31$
©2018 Wantedly, Inc. Ͳ͏ͬͯෆ҆ఆʹ͢Δ͔ Ϣʔβʔ ͚ͩ͜͜ʹෆ҆ఆ͞Λ͍ΕΕ͍͍
©2018 Wantedly, Inc. Ͳ͏ͬͯෆ҆ఆʹ͢Δ͔ Ϣʔβʔ H31$*OUFSDFQUPS IUUQ.JEEMFXBSF
©2018 Wantedly, Inc. Ͳ͏͍ͬͨৼΔ͍Λ͖͔͢ https://engineering.linkedin.com/blog/2018/05/linkedout--a-request-level-failure-injection-framework -JOLFEJOͷ'BJMVSF*OKFDUJPO'SBNFXPSLͰ w &SSPS w %FMBZ
w 5JNFPVU ͷͭΛೖΕ͍ͯΔ
©2018 Wantedly, Inc. Ͳ͏͍ͬͨৼΔ͍Λ͖͔͢ https://engineering.linkedin.com/blog/2018/05/linkedout--a-request-level-failure-injection-framework -JOLFEJOͷ'BJMVSF*OKFDUJPO'SBNFXPSLͰ w &SSPS w %FMBZ
w 5JNFPVU ͷͭΛೖΕ͍ͯΔ ͦͷ͏ͪɺ&SSPSɾ5JNFPVU͕͋Εࢼͤͦ͏ɻ ߋʹɺͦ͏͍ͬͨৼΔ͍ϥϯμϜʹى͖ΔΑ͏ʹ͍ͨ͠ αʔϏεΛ6OJY5JNF͕/ͰׂΓΕΔͱ͖ΞϗʹͳΔΑ͏ʹ͢Εྑ͛͞
©2018 Wantedly, Inc. Ͳ͏͍ͬͨৼΔ͍Λ͖͔͢ { "interval": 1, "slow_response_option": { "enable":
true, "time": 5 }, "server_error_option": { "enable": true } }
©2018 Wantedly, Inc. ͦ͏͍ͬͨύοέʔδΛ࡞ͨ͠ https://github.com/rerost/unstable
©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")) }
©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) } }
©2018 Wantedly, Inc. Demo
©2018 Wantedly, Inc. γϡοͱ'BVMU*OKFDUJPO͍ͨ͠ͱ͖ʹ͓͢͢Ί $IBPT&OHJOFFSJOHͱ͔ఆ͍ͯ͠ͳ͍