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Similaire à 10 分で書ける Cloud Foundry Route Service
Similaire à 10 分で書ける Cloud Foundry Route Service (20)
10 分で書ける Cloud Foundry Route Service
- 18. デモ
- 19. hiroaki@HMP:~/demo$ tree . !"" hello # !"" Staticfile # !"" index.html # %"" manifest.yml %"" s-rs !"" Godeps # !"" Godeps.json # !"" Readme # %"" _workspace !"" Procfile !"" README.md !"" main.go %"" manifest.yml 4 directories, 9 files Client Load Balancer CF Router App CF Route Service hello/ 配下はこの後 Backend の App に、 s-rs/ 配下は Route-Service になる予定です。 ソースコードは下記 Repository でも見ることができます h[ps://github.com/hiroakiukaji/simple-route-service-handson
- 20. hiroaki@HMP:~/demo$ cd hello/ hiroaki@HMP:~/demo/hello$ ls Staticfile index.html manifest.yml hiroaki@HMP:~/demo/hello$ cf push Using manifest file /Users/hiroaki/demo/hello/manifest.yml Creating app staticapp in org ukaji_org / space ukaji_space as ukaji... OK : : : : : App started OK App staticapp was started using this command `sh boot.sh` Showing health and status for app staticapp in org ukaji_org / space ukaji_space as ukaji... OK requested state: started instances: 1/1 usage: 256M x 1 instances urls: staticapp.mcf.nttlabs.info last uploaded: Mon Aug 8 02:36:03 UTC 2016 stack: unknown buildpack: staticfile 1.3.9 state since cpu memory disk details #0 running 2016-08-08 11:36:17 AM 0.0% 0 of 256M 0 of 1G hiroaki@HMP:~/demo/hello$ curl staticapp.mcf.nttlabs.info (´･_･`) Client Load Balancer CF Router App CF まずは Backend のアプリをデプロイ
- 21. hiroaki@HMP:~/demo/hello$ cd ../s-rs/ hiroaki@HMP:~/demo/s-rs$ ls Godeps Procfile README.md main.go manifest.yml hiroaki@HMP:~/demo/s-rs$ cf push : : : : : requested state: started instances: 1/1 usage: 256M x 1 instances urls: simple-rs.mcf.nttlabs.info last uploaded: Mon Aug 8 04:19:13 UTC 2016 stack: unknown buildpack: go_buildpack state since cpu memory disk details #0 running 2016-08-08 01:19:32 PM 0.0% 0 of 256M 0 of 1G hiroaki@HMP:~/demo/s-rs$ cf create-user-provided-service simplerouteservice -r https://simple-rs.mcf.nttlabs.info Creating user provided service simplerouteservice in org ukaji_org / space ukaji_space as ukaji... OK hiroaki@HMP:~/demo/s-rs$ cf services Getting services in org ukaji_org / space ukaji_space as ukaji... OK name service plan bound apps last operation simplerouteservice user-provided Route Service として使う HTTP サーバをデプロイ。(※) その後 HTTP サーバを Service として認識させる。 ※ HTTPS で到達できる場所ならばどこでも構いませんが、 今回はたまたま Cloud Foundry 上に同居させています。 Client Load Balancer CF Router App CF Route Service
- 22. hiroaki@HMP:~/demo/s-rs$ cf bind-route-service mcf.nttlabs.info simplerouteservice -n staticapp Binding route staticapp.mcf.nttlabs.info to service instance simplerouteservice in org ukaji_org / space ukaji_space as ukaji... OK hiroaki@HMP:~/demo/s-rs$ curl staticapp.mcf.nttlabs.info (´･_･`) Route Service としてバインドすれば完成。 Client Load Balancer CF Router App CF Route Service hiroaki@HMP:~$ cf logs simple-rs Connected, tailing logs for app simple-rs in org ukaji_org / space ukaji_space as ukaji... 2016-08-08T13:36:58.24+0900 [RTR/0] OUT simple-rs.mcf.nttlabs.info - [08/08/2016:04:36:58.238 +0000] "GET / HTTP/1.0" 200 0 13 "-" "curl/7.43.0" 192.168.12.34:35667 x_forwarded_for:"192.168.10.40, 192.168.12.34, 192.168.13.51" x_forwarded_proto:"https" vcap_request_id:ab5cfd36-1548-4f95-7fb2-8c9fc7dc3262 response_time:0.008521804 app_id:2b11f3ec-d733-48e2- b141-5ac98020eee3 何も処理をしていないので振る舞いは変わりませんが、 Route Service のアプリのログを見てみると何らかの HTTP アクセスが飛んでいることが分かるはず。
- 24. Route Service by Golang の実装 最小構成で 60 行ぐらい package main import ( : ) type SimpleRoundTripper struct { transport http.RoundTripper } func newSimpleRoundTripper() *SimpleRoundTripper { transport := &http.Transport{ TLSClientConfig: &tls.Config{InsecureSkipVerify: skipSslValidation()}, } return &SimpleRoundTripper{ transport: transport, } } func (s *SimpleRoundTripper) RoundTrip(request *http.Request) (*http.Response, error) { var response *http.Response var err error response, err = s.transport.RoundTrip(request) if err != nil { return nil, err } return response, err } func main() { http.Handle("/", newProxy()) log.Fatal(http.ListenAndServe(":"+os.Getenv("PORT"), nil)) } func newProxy() http.Handler { proxy := &httputil.ReverseProxy{ Director: func(r *http.Request) { url, err := url.Parse(r.Header.Get("X-Cf-Forwarded-Url")) if err != nil { log.Fatalln(err.Error()) } r.URL = url r.Host = url.Host }, Transport: newSimpleRoundTripper(), } return proxy } func skipSslValidation() bool { var skipSslValidation bool var err error if skipSslValidation, err = strconv.ParseBool(os.Getenv("SKIP_SSL_VALIDATION")); err != nil { skipSslValidation = true } return skipSslValidation }
- 25. Route Service by Golang の実装 Entrypoint func main() { http.Handle("/", newProxy()) log.Fatal(http.ListenAndServe(":"+os.Getenv("PORT"), nil)) } GET / を待ち受けるただの HTTP サーバ
- 26. Route Service by Golang の実装 Route Service の本体を担うメソッド func (s *SimpleRoundTripper) RoundTrip(request *http.Request) (*http.Response, error) { var response *http.Response var err error response, err = s.transport.RoundTrip(request) if err != nil { return nil, err } return response, err } あからさまに Request を受けて Response を返している人がいます ※この例は本当に素通しで何もしていません
- 27. Route Service by Golang の実装 Route Service の本体を担うメソッドを書いてみる func (s *SimpleRoundTripper) RoundTrip(request *http.Request) (*http.Response, error) { var response *http.Response var err error response, err = s.transport.RoundTrip(request) if err != nil { return nil, err } return response, err } 適当な処理を書いて Response を投げ返してみましょう こ の へ ん
- 28. デモ
- 29. hiroaki@HMP:~/demo/s-rs$ ls Godeps Procfile README.md main.go manifest.yml hiroaki@HMP:~/demo/s-rs$ vi main.go : func (s *SimpleRoundTripper) RoundTrip(request *http.Request) (*http.Response, error) { var response *http.Response var err error str := "＿人人人人人＿n＞ (´･_･`) ＜n￣Y^Y^Y^Y^Y￣n" dummyResponse := &http.Response{ StatusCode: 200, Body: ioutil.NopCloser(bytes.NewBufferString(str)), } return dummyResponse, err response, err = s.transport.RoundTrip(request) if err != nil { return nil, err } return response, err } : ダミーの HTTP レスポンスを生成して 返してしまうだけのコードを追加
- 30. hiroaki@HMP:~/demo/s-rs$ cf push : : : : : requested state: started instances: 1/1 usage: 256M x 1 instances urls: simple-rs.mcf.nttlabs.info last uploaded: Mon Aug 8 04:54:37 UTC 2016 stack: unknown buildpack: go_buildpack state since cpu memory disk details #0 running 2016-08-08 01:55:10 PM 0.0% 3.2M of 256M 7.7M of 1G hiroaki@HMP:~/demo/s-rs$ curl staticapp.mcf.nttlabs.info ＿人人人人人＿ ＞ (´･_･`) ＜ ￣Y^Y^Y^Y^Y￣ コードを書き換えたので再デプロイ。 HTTP サーバの中身が入れ替わるだけなので、 Service 登録のやり直し等は特に必要ありません。 Client Load Balancer CF Router App CF Route Service hiroaki@HMP:~/demo/s-rs$ cf unbind-route-service mcf.nttlabs.info simplerouteservice -n staticapp -f Unbinding route staticapp.mcf.nttlabs.info from service instance simplerouteservice in org ukaji_org / space ukaji_space as ukaji... OK hiroaki@HMP:~/demo/s-rs$ curl staticapp.mcf.nttlabs.info (´･_･`) hiroaki@HMP:~/demo/s-rs$ cf bind-route-service mcf.nttlabs.info simplerouteservice -n staticapp Binding route staticapp.mcf.nttlabs.info to service instance simplerouteservice in org ukaji_org / space ukaji_space as ukaji... OK hiroaki@HMP:~/demo/s-rs$ curl staticapp.mcf.nttlabs.info ＿人人人人人＿ ＞ (´･_･`) ＜ ￣Y^Y^Y^Y^Y￣ 今度は Route Service の bind / unbind 毎に HTTP レスポンスの差を視認できるはず。
- 31. Client Load Balancer CF Router App CF Route Service ① ② ③ ④ ⑤ ⑥ Q. 何か余計なアクセスぐるぐるしてるけど 性能的にどうなんですか？
- 32. A. 落ちます。 こ の へ ん Route Service 無し 素通し Route Service 1000REQ / 1par 124.11 34.04 1000REQ / 5par 512.31 118.04 1000REQ / 10par 793.65 174.64 1000REQ / 20par 1377.21 207.25 VS Route Service 無し 素通し Route Service ただし・・・
- 34. A. 落ちます。ただし、 諸事情により採用したアーキテクチャが network hop 嵩む系 Fully Brokered StaAc Brokered User Provided 今回はこれ 使う側が超楽 ◯ × 経路増加大 経路に無駄がない ◯ × インフラ構成要変更 お手軽 ◯ × 経路増加大 公式 Route Service Architecture 3 パターン
- 35. まとめ • Cloud Foundry Route Service ＝ CF アプリへのリクエストに処理を加える Service – 実体はほぼただの HTTP サーバ – ソースコードは平易なので一読がおすすめ – 性能は当然落ちるので導入要否は各自検証