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Hystrix @ Vaadin Meetup Düsseldorf
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Benjamin Wilms
September 12, 2016
Technology
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Hystrix @ Vaadin Meetup Düsseldorf
Folien zu meinem Talk auf dem 2. Vaadin Meetup in Düsseldorf vom 8.9.2016
Benjamin Wilms
September 12, 2016
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Transcript
Hystrix_ Benjamin Wilms
2 Agenda
3 About me Benjamin Wilms www.codecentric.de blog.codecentric.de @MrBWilms IT-Consultant
4 Hystrix Introduction
5
6 99,99 %
7 Bei 30 abhängigen µServices: 99,7 %
8 2 Stunden und 15 Minuten Downtime pro Monat
9 Welche Features bietet Hystrix?
10
11 8 Resilience Patterns
12 Pattern • Timeout (Hystrix) • Bulkheads (Hystrix) • Circuit
Breaker (Hystrix) • Steady State • Fail Fast • Handshaking • Test harness • Decoupling middleware
13 Real World
14 24/7 Kundenportal Flickr: Jessica Spengler
15 geplante Ausfallzeiten
16 ungeplante Ausfallzeiten
17 Legacy Backend via Hystrix
18 Demo-Anwendung
19 Sender & Receiver Transport GmbH
20 Demo-Architektur
21 Demo-Architektur
22 Hystrix & Archaius
23 Hystrix & Archaius • dynamic & typed • thread
safe • polling framework • callback mechanism • dynamic configuration
24 Hystrix & Archaius • AWS Dynamo DB • Apache
ZooKeeper • CoreOS etcd
25 CoreOS etcd • Distributed key value store • REST
API • Cluster ready
26 Architektur
27 Archaius & etcd // Config fallback (config.properties) and Etcd
configuration compositeConfig = new ConcurrentCompositeConfiguration(); ClasspathPropertiesConfiguration.initialize(); // File based config // CoreOS Etcd service configuration etcdConfigSource = new EtcdConfigurationSource(etcd, "/hystrix/"); etcdConfig = new DynamicWatchedConfiguration(etcdConfigSource); compositeConfig.addConfiguration(etcdConfig,"etcd dynamic override config"); ConfigurationManager.install(compositeConfig);
28 Chaos Monkey
29 Chaos Monkey
30 Simian Army
31 Archaius & etcd Timeouts Exceptions
32 Archaius & etcd curl -L -X PUT http://etcd:2379/v2/keys/hystrix/chaos.monkey.active -d
value=true
33 Demo Hystrix Configuration via etcd
34 Spring Cloud Netflix & Spring Boot @SpringBootApplication @EnableCircuitBreaker @EnableHystrixDashboard
@Import(ArchaiusConfiguration.class) public class TransportServiceAppl { public static void main(String[] args) { SpringApplication.run(TransportServiceApp.class, args); } }
35 Demo Zusammenfassung
36 Zusammenfassung • Chaos Monkey aktiviert • Remote Services konfiguriert
• Hystrix Timeouts gesetzt • Hystrix Circuit Breaker open/close • Hystrix Fallbacks deaktiviert
37 GitHub Demo-Projekt unter: github.com/MrBW/hystrix-warstories-applications
38 Danke. Fragen?
39