Stretching the Service Mesh

Originally presented at .NET Conf 2019. In this talk, you'll learn about how to stretch the service mesh for .NET applications.

Transcript

1. www.dotnetconf.n et
2. Stretching the Service Mesh Rosemary Wang
3. she/her Developer Advocate rosemary@hashicorp.com @joatmon08 joatmon08 Rosemary Wang
4. • What’s the buzz about service mesh? • Examination: Tracing • Examination: Traffic Management • What can we conclude? Overview
5. .NET What’s the buzz about service mesh?
6. We need a service mesh. We can't trace transaction s. We don't have a way to control traffic. We can't secure every application .
7. We need a service mesh because Kubernetes has one. We can't trace transaction s. We don't have a way to control traffic. We can't secure every application .
8. Private Monolith to Microservices, Private to Public Cloud… MSSQL Server Expens e v1 Expens e v2 Public Cloud Report
9. We need a library OR some proxy to control. We can't trace transaction s. We don't have a way to control traffic. We can't secure every application .
10. .NET Examination: Tracing*
11. * Tracing is non-trivial.
12. Code Sample Using a Library public void ConfigureServices(IServiceCollection services) { // sections omitted for clarity services.AddOpenTracing(); services.AddSingleton<ITracer>(serviceProvider => { // sections omitted for clarity }); services.Configure<HttpHandlerDiagnosticOptions>(options => { options.IgnorePatterns.Add(request => request.RequestUri.ToString().Contains (Configuration.GetConnectionString("JaegerURL"))); }); }
13. Code Sample Using a Library (Jaeger) services.AddSingleton<ITracer>(serviceProvider => { string serviceName = serviceProvider.GetRequiredService<IHostingEnvironment>().A pplicationName; var sampler = new ConstSampler(sample: true); var reporter = new RemoteReporter.Builder() .WithSender(new HttpSender( Configuration.GetConnectionString("Jaeger")) .Build(); var tracer = new Tracer.Builder(serviceName) .WithSampler(sampler) .WithReporter(reporter) .Build(); return tracer; });
14. Jaeger Zipkin… zipkin4net? OpenTelemetr y? Zipkin with OpenTracing? Consul + Envoy
15. Takeaways • Still need a library and code to mark spans • Lots of movement in this space • OpenCensus + OpenTracing = OpenTelemetry • Currently, no stable library for .NET + Zipkin + OpenTracing • Envoy 1.12 (Jaeger) • Keep it as library?
16. .NET Examination: Traffic Management
17. Private Circuit Breaking Database Expens e v2 Public Cloud Report database issues “when I get 500s three times, stop.”
18. Libraries… Akka Polly Write your own logic? Circuit Breaking Libraries
19. Code Sample Circuit Breaking (Envoy) "outlier_detection": { "consecutive_5xx": 10, "consecutive_gateway_failure": 10, "base_ejection_time": "30s" } "circuit_breakers": { "thresholds": [ { "priority": "HIGH", "max_requests": 10 } ] }
20. Private Canary or A/B Testing MSSQL Server Expens e v1 Expens e v2 Public Cloud Report testgroup: b
21. Code Sample Canary or A/B Testing kind = "service-router" name = "expense" routes = [ { match { http { header = [ { name = "testgroup" exact = "b" }, ] } } destination { service = "expense" service_subset = "v2" } } ]
22. Private Traffic Splitting MSSQL Server Expens e v1 Expens e v2 Public Cloud Report
23. Code Sample Traffic Splitting kind = "service-splitter", name = "expense" splits = [ { weight = 50, service_subset = "v1" }, { weight = 50, service_subset = "v2" } ]
24. .NET What can we conclude?
25. • Still non-trivial • Libraries + mesh compatibility requires investigation • Maybe greatest value in proxy in front of database? Tracing
26. • Worth attempting (fewer libraries) • Less configuration within application code • Control traffic based on intent Traffic Shaping
27. • envoyproxy.io/docs • Nic Jackson’s Consul-Related Works • github.com/nicholasjackson/demo-consul-service-mesh • hashicorp.com/resources/consul-service-mesh-deep-dive • github.com/joatmon08/dotnet-service-mesh-example References
28. Thank you! Rosemary Wang rosemary@hashicorp.com @joatmon08