Cloud Native & Java EE: Freund oder Feind?
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Das Dokument behandelt die Integration von Java EE (JEE) in cloud-native Architekturen, indem es die Vorzüge der Modularität und Standardisierung von JEE betont. Es wird erläutert, wie JEE durch den Einsatz von Micro-Containern und Designprinzipien für Cloud-native Anwendungen angepasst werden kann, um Fehlertoleranz, Skalierbarkeit und Automatisierung zu erreichen. Außerdem werden Werkzeuge und Methoden zur Entwicklung, Bereitstellung und Überwachung von Microservices in dieser Umgebung vorgestellt.
![public class Main {
/**
* Starts the microservice container.
*
* Requires environment variable "PORT" according
* on what port to listen.
*
* @param args no arguments evaluated
*/
public static void main(String[] args) {
com.kumuluz.ee.EeApplication.main(args);
}
}
JEE MICRO CONTAINER STARTUP](https://image.slidesharecdn.com/adersberger-javaland-2017-cloud-native-java-ee-171221125611/85/Cloud-Native-Java-EE-Freund-oder-Feind-22-320.jpg)
![SERVICE REGISTRATION: HEAVY LIFTING
/**
* Registeres a service
*
* see https://github.com/eBay/fabio/wiki/Service-Configuration
*/
public synchronized void registerService(String serviceName, String servicePath) {
String applicationHost = getOutboundHost();
int applicationPort = getOutboundPort();
HostAndPort consulEndpoint = getConsulHostAndPort();
logger.info("Will register service on host {} and port {} at consul endpoint {}",
applicationHost, applicationPort, consulEndpoint.toString());
//generate unique serviceId
String serviceId = serviceName + "-" + applicationHost + ":" + applicationPort;
String fabioServiceTag = "urlprefix-" + servicePath;
//point healthcheck URL to dropwizard metrics healthcheck servlet
URL serviceUrl = UrlBuilder.empty()
.withScheme("http")
.withHost(applicationHost)
.withPort(applicationPort)
.withPath("/metrics/ping").toUrl();
// Service bei Consul registrieren inklusive einem Health-Check auf die URL des REST-Endpunkts.
logger.info("Registering service with ID {} and NAME {} with healthcheck URL {} and inbound ROUTE {}",
serviceId, serviceName, serviceUrl, fabioServiceTag);
//use consul API to register service
ConsulClient client = new ConsulClient(consulEndpoint.toString());
NewService service = new NewService();
service.setId(serviceId);
service.setName(serviceName);
service.setPort(applicationPort);
service.setAddress(applicationHost);
List<String> tags = new ArrayList<>();
tags.add(fabioServiceTag);
service.setTags(tags);
//register health check
NewService.Check check = new NewService.Check();
check.setHttp(serviceUrl.toString());
check.setInterval(ConsulFabioServiceDiscovery.HEALTHCHECK_INTERVAL + "s");
service.setCheck(check);
client.agentServiceRegister(service);
}
public static String getOutboundHost() {
String hostName = System.getenv(HOSTNAME_ENVVAR);
String host = System.getenv(HOST_ENVVAR);
if (hostName == null && host == null) return DEFAULT_HOST;
else if (host != null) return host;
else {
File etcHosts = new File("/etc/hosts");
List<String> lines;
try {
lines = Files.readLines(etcHosts, Charset.defaultCharset());
} catch (IOException e) {
return DEFAULT_HOST;
}
for (String line: lines){
if (!line.trim().startsWith("#") && !line.trim().isEmpty()) {
String[] etcEntry = line.split("s+");
if (etcEntry[1].equals(hostName)) return etcEntry[0];
}
}
return DEFAULT_HOST;
}
}
public static int getOutboundPort() {
String portEnv = System.getenv(PORT_ENVVAR);
if (portEnv == null) return DEFAULT_PORT;
return Integer.valueOf(portEnv);
}
public static HostAndPort getConsulHostAndPort() {
String consulEnv = System.getenv(CONSUL_ENVVAR);
if (consulEnv == null) return HostAndPort.fromString(CONSUL_DEFAULT_HOSTANDPORT);
else return HostAndPort.fromString(consulEnv);
}
@ConsulFabio
@ApplicationScoped
public class ConsulFabioServiceDiscovery implements IServiceDiscovery {
den Host-Namen und Port ermitteln, den Consul sieht
den Health-Check Endpunkt ermitteln (MetricsServlet)
Metadaten für Fabio erzeugen
Service bei Consul registrieren
(ebenso wie Diagnose- und Doku-Endpunkte)](https://image.slidesharecdn.com/adersberger-javaland-2017-cloud-native-java-ee-171221125611/85/Cloud-Native-Java-EE-Freund-oder-Feind-36-320.jpg)
![MARATHON APP DEFINITION
{
"id": "/zwitscher",
"groups": [
{
"id": "/zwitscher/infrastructure",
"apps": [
{
"id": "consul",
"cpus": 1,
"mem": 256,
"disk": 0,
"instances": 1,
"cmd": "/bin/consul agent -server -ui -advertise=$HOST -config-dir=/config -data-dir=/tmp/consul -bootstrap-expect=1 -node=consul-server -client=0.0.0.0",
"container": {
"docker": {
"image": "gliderlabs/consul-server:0.6",
"forcePullImage": true,
"privileged": false,
"network": "HOST",
"portDefinitions": [
{ "port": 8300, "protocol": "tcp", "name": "server-rpc" },
{ "port": 8301, "protocol": "tcp", "name": "serf-lan" },
{ "port": 8302, "protocol": "tcp", "name": "serf-wan" },
{ "port": 8400, "protocol": "tcp", "name": "cli-rpc" },
{ "port": 8500, "protocol": "tcp", "name": "http-api" },
{ "port": 8600, "protocol": "udp", "name": "dns" }
],
"requirePorts" : true
}
},
"env": {
"GOMAXPROCS": "10"
},
"healthChecks": [
{
"protocol": "HTTP",
"port": 8500,
"path": "/v1/status/leader",
"intervalSeconds": 10,
"timeoutSeconds": 10,
"maxConsecutiveFailures": 3
}
]
},
{
"id": "fabio",
"cpus": 1,
"mem": 256,
"disk": 0,
"instances": 1,
"env": {
"registry_consul_addr": "consul.infrastructure.zwitscher.marathon.mesos:8500"
},
"container": {
"docker": {
"image": "magiconair/fabio:latest",
"forcePullImage": true,
"privileged": false,
"network": "HOST",
"portDefinitions": [
{ "port": 9998, "protocol": "tcp", "name": "web-ui" },
{ "port": 9999, "protocol": "tcp", "name": "proxy-port" }
],
"requirePorts" : true
}
},
"acceptedResourceRoles":["slave_public"],
"healthChecks": [
{
"protocol": "HTTP",
"port": 9998,
"path": "/health",
"intervalSeconds": 10,
"timeoutSeconds": 10,
"maxConsecutiveFailures": 3
}
]
}
]
},
{
"id": "/zwitscher/services",
"apps": [
{
"id": "zwitscher-chuck",
"cpus": 1,
"mem": 256,
"disk": 0,
"instances": 1,
"container": {
"docker": {
"image": "adersberger/zwitscher-app-chuck:1.0.0-SNAPSHOT",
"forcePullImage": true,
"privileged": false,
"network": "HOST",
"portDefinitions": [
{ "port": 12340, "protocol": "tcp", "name": "rest-api" }
],
"requirePorts" : true
}
},
"env": {
"PORT": "12340",
"CONSUL": "consul.infrastructure.zwitscher.marathon.mesos:8500",
"CONFIG_ENV" : "zwitscher"
},
"args": [
"-Xmx256m"
],
"healthChecks": [
{
"protocol": "HTTP",
"port": 12340,
"path": "/metrics/ping",
"intervalSeconds": 10,
"timeoutSeconds": 10,
"maxConsecutiveFailures": 3
}
],
"dependencies": [
"/zwitscher/infrastructure/consul"
]
}
]
}
]
}
marathon-appgroup.json
/zwitscher
/infrastructure
/consul
/fabio
/service
/zwitscher-chuck
dependency
"healthChecks": [
{
"protocol": “HTTP", "port": 9998, "path": "/health",
"intervalSeconds": 10, "timeoutSeconds": 10, "maxConsecutiveFailures": 3
}
]
Health Checks:
"network": "HOST",
"ports": [9998, 9999],
"requirePorts" : true
Networking:
"acceptedResourceRoles":["slave_public"]
API Gateway auf den Public Slaves:
"env": {
"PORT": "12340",
"CONSUL": "consul.infrastructure.zwitscher.marathon.mesos:8500"
},
"args": ["-Xmx256m"]
Konfiguration:
"container": { "docker": {
"image": "adersberger/zwitscher-app-chuck:1.0.0-SNAPSHOT",
"forcePullImage": true
Immer das aktuelle Docker Image bekommen:
"dependencies": [ "/zwitscher/infrastructure/consul"]
Startup-Abhängigkeiten (eher zu vermeiden):](https://image.slidesharecdn.com/adersberger-javaland-2017-cloud-native-java-ee-171221125611/85/Cloud-Native-Java-EE-Freund-oder-Feind-42-320.jpg)
Cloud Native & Java EE: Freund oder Feind?
- 1. CLOUD NATIVE & JEE FREUND ODER FEIND? Josef Adersberger ( @adersberger)
- 2. ★ Design for Distribution: Container, Microservices, API-getriebene Entwicklung ★ Design for Performance: Responsive, nebenläufig, ressourcenschonend ★ Design for Automation: Dev- und Ops-Aufgaben automatisieren ★ Design for Resiliency: Fehlertolerant und selbst-heilend ★ Design for Elasticity: Dynamisch skalierbar und reaktiv ★ Design for Delivery: Kurze Roundtrips und automatisierte Provisionierung ★ Design for Diagnosability: Cluster-weite Logs, Metriken und Traces 2 Mehr Ordnung: Cloud Native Maturity Model (https://de.slideshare.net/Pivotal/the-cloud-native-journey-58445711) Mehr Lösung: The Twelve-Factor App Methodology (https://12factor.net) Design-Prinzipien für Cloud Native Applications
- 4. JEE IST AKTUELL WEDER HÄSSLICH NOCH REIN AUF MONOLITHEN AUSGELEGT ▸ Die JEE API ist modular und in vielen Teilen leichtgewichtig (unter uns: manchmal fühlt sich Spring schwergewichtiger an) ▸ Neben den klassischen Application Servern sind nun auch JEE Micro Container verfügbar, mit denen JEE-Anwendungen in Microservices geschnitten werden können ▸ Das Wissen ist breit verteilt, wie Enterprise Anwendungen auf Basis JEE entwickelt werden können ▸ Die JEE API ist standardisiert und reif. Die Implementierungen sind “battle proven”. ▸ … aber leider werden auch in JEE 8 die Design-Prinzipien von Cloud Native Applications noch zu wenig berücksichtigt. Mit Hilfe von Open-Source- Bausteinen gelingt dies aber trotzdem.
- 6. SICHT DES ARCHITEKTENS CLOUD NATIVE JEE
- 7. WIR NEIGEN DAZU, JEE-ANWENDUNGEN IN SCHWERGEWICHTIGEN APPSERVERN ALS AUSFÜHRUNGSMONOLITHEN LAUFEN ZU LASSEN DESIGN CODE RUN startup-cluster.sh JEE Impl. JEE App Server
- 8. JEE MICRO CONTAINER ERMÖGLICHEN JEE AUSFÜHRUNGSKOMPONENTEN (MICROSERVICES) IN EINER MAßGESCHNEIDERTEN AUSFÜHRUNGSUMGEBUNG DESIGN CODE RUN main() JEE impl. parts
- 9. EINE CLOUD AN JEE MICROSERVICES! MISSION ERFOLGREICH? image: https://www.dreamstime.com
- 10. eine Cloud ist nicht nichts
- 11. CLOUD NATIVE STACK JEE MICROSERVICES
- 12. CLUSTER VIRTUALIZATION (computing, network, storage, memory) CLUSTER RESOURCE MANAGER CLUSTER ORCHESTRATOR APPLICATIONS CONTAINER CLUSTER RESOURCES MICROSERVICE PLATFORM API Gateway Micro Container Configuration & Coordination Diagnosability & Monitoring Infrastructure-as-a-Service Bare Metal Local Host Service Client Service Discovery DevOps Interface •deploy •rollback •scale •configure Diagnose Interface •analyze logs •analyze metrics •analyze traces Edge Interface •request service •authenticate
- 13. CLUSTER VIRTUALIZATION (computing, network, storage, memory) CLUSTER RESOURCE MANAGER CLUSTER ORCHESTRATOR APPLICATIONS CONTAINER CLUSTER RESOURCES MICROSERVICE PLATFORM API Gateway Micro Container Configuration & Coordination Diagnosability & Monitoring Infrastructure-as-a-Service Bare Metal Local Host Service Client Service Discovery DevOps Interface •deploy •rollback •scale •configure Diagnose Interface •analyze logs •analyze metrics •analyze traces Edge Interface •request service •authenticate Wie können den Containern die passenden Ressourcen zugewiesen werden? Wie entkoppelt man von physischer Hardware? Wie führt man containerisierte Anwendungen im Cluster aus? Wie entdeckt man Laufzeitanomalien und ihre Ursachen? Wie ruft man resilient und responsive andere Microservices auf? Wie führt man einen Microservice aus? Wie erzeugt man cluster-weiten Konsens zu Konfigurationswerten etc. Wie exponiert man Services in das Internet? Wie verwaltet man zentral die verfügbaren Services und Endpunkte?
- 14. goo.gl/xrVg3J
- 15. CLUSTER VIRTUALIZATION (computing, network, storage, memory) CLUSTER RESOURCE MANAGER CLUSTER ORCHESTRATOR APPLICATIONS CONTAINER CLUSTER RESOURCES MICROSERVICE PLATFORM API Gateway Micro Container Configuration & Coordination Diagnosability & Monitoring Infrastructure-as-a-Service Bare Metal Local Host Service Client Service Discovery DevOps Interface Diagnose InterfaceEdge Interface
- 16. DER ZWITSCHER CLOUD NATIVE JEE SHOWCASE ZWITSCHER-APP-HISTORY ZWITSCHER-APP-WIKIPEDIAZWITSCHER-APP-CHUCK ZWITSCHER-APP-BOARD Keyword Resultat + Keyword-Historie random joke (weil jeder Chuck Norris Witz auf jedes Keyword matched) JDBC Open API ZWITSCHER-APP-CHUCK fallback https://github.com/adersberger/cloud-native-zwitscher-jee
- 17. SICHT DES ENTWICKLERS CLOUD NATIVE JEE
- 19. DAS JEE MICRO CONTAINER ÖKOSYSTEM http://wildfly-swarm.io https://ee.kumuluz.com http://microprofile.io (to come) http://tomee.apache.org http://www.payara.fish/payara_micro EMBEDDED implements (unstable)
- 20. JEE MICRO CONTAINER IM VERGLEICH Payara Micro Wildfly Swarm TomEE kumuluzEE Servlets et al. x x x x WebSockets x x x JSF x x x JAX-RS x x x (TomEE+) x JAX-WS x x (TomEE+) EJB *2 x x x CDI x x x x JTA x x x JCA x x (TomEE+) JMS x x (TomEE+) JPA x x x x Bean Validation x x x x JBatch x x Concurrency x x JCache x x JEE Version JEE 7 Web Profile JEE 7 JEE 6, JEE 7 teilw.*1 JEE 7 teilw. Packetierung WAR + JAR JAR JAR classes + JARs Startup-Dauer 4s 4s 2s 1s Referenz-Größe 57MB 83 MB 44 MB 15 MB *1) http://tomee.apache.org/javaee7-status.html *2) http://stackoverflow.com/questions/13487987/where-to-use-ejb-3-1-and-cdi
- 21. @Path(“/joke") @RequestScoped public class ChuckJokeResource { @Inject private IcndbIntegration icndb; @GET @Produces("application/json") public Response getJoke() { Map<String, String> json = new HashMap<>(); json.put("message", icndb.getRandomJoke()); return Response.ok(json).build(); } } @ApplicationPath("/chuck") public class ChuckJokeApplication extends ResourceConfig { public ChuckJokeApplication() { super(); register(ChuckJokeResource.class); } } JAX-RS MIT CDI bean-discovery-mode="all"
- 22. public class Main { /** * Starts the microservice container. * * Requires environment variable "PORT" according * on what port to listen. * * @param args no arguments evaluated */ public static void main(String[] args) { com.kumuluz.ee.EeApplication.main(args); } } JEE MICRO CONTAINER STARTUP
- 23. SERVICE CLIENTSERVICE DISCOVERY LOAD BALANCING REQUEST MONITORING CIRCUIT BREAKING
- 24. SERVICE CLIENT MIT JERSEY, RXJAVA UND HYSTRIX •Circuit Breaker (Resiliency) •Request Monitoring •JAX-RS 2.0 REST Client•Parallele und asynchrone Ausführung (Responsive)
- 25. SERVICE CLIENT MIT JERSEY, RXJAVA AND HYSTRIX @RequestScoped public class IcndbIntegration implements IChuckNorrisJokes { @Override public String getRandomJoke() { IcndbIntegrationCommand cmd = new IcndbIntegrationCommand(); return cmd.observe().toBlocking().toFuture().get(); } private class IcndbIntegrationCommand extends HystrixObservableCommand<String> { IcndbIntegrationCommand() { super(Setter.withGroupKey(HystrixCommandGroupKey.Factory.asKey("zwitscher")) .andCommandPropertiesDefaults(HystrixCommandProperties.Setter() .withExecutionTimeoutInMilliseconds(3000))); } @Override protected Observable<String> construct() { return RxObservable.newClient() .target("http://api.icndb.com").path("jokes/random").request(MediaType.APPLICATION_JSON_TYPE) .rx().get() .map(response -> { Map<String, Map<String, String>> json = response.readEntity(Map.class); return json.get("value").get("joke"); }); } } } •Asnc bis zum Client mit dem Async-Support ab Servlet API 3 •Mehr Nebenläufigkeit ein Y-Stück Observable
- 26. FALLBACK WITZE @RequestScoped public class IcndbIntegration implements IChuckNorrisJokes { @Inject @Named("chucknorrisjoke-chucknorrisio") private IChuckNorrisJokes fallback; @Override public Observable<String> getRandomJokeObservable() { return new IcndbIntegrationCommand().observe(); } //… private class IcndbIntegrationCommand extends HystrixObservableCommand<String> { //… @Override protected Observable<String> resumeWithFallback() { return fallback.getRandomJokeObservable(); } } }
- 28. DAS MAGISCHE DREIECK DER DIAGNOSTIZIERBARKEIT Metriken Logs Traces Cluster-wide Diagnosis
- 29. DIAGNOSTIZERBARKEIT: METRIKEN DROPWIZARD METRICS JERSEY HYSTRIX MICRO SERVICE PROMETHEUS SERVLET METRICS SERVLET HYSTRIX SERVLET Dashboard / Turbine Health Checks Service Lookup
- 30. INSTRUMENTIERUNG @ApplicationPath("/chuck") public class ChuckJokeApplication extends ResourceConfig { public ChuckJokeApplication() { super(); //Instrument application with metrics MetricRegistry METRIC_REGISTRY = MetricsProvider.getMetricRegistryInstance(); register(new InstrumentedResourceMethodApplicationListener(METRIC_REGISTRY)); HystrixPlugins.getInstance().registerMetricsPublisher( new HystrixCodaHaleMetricsPublisher(METRIC_REGISTRY)); //Register Prometheus metric exporter CollectorRegistry.defaultRegistry.register(new DropwizardExports(METRIC_REGISTRY)); } } Die eingehenden REST-Aufrufe instrumentieren Die ausgehenden REST-Aufrufe instrumentieren Alle Metriken für Prometheus bereitstellen Die MetricRegistry holen (Singleton)
- 33. SERVICE DISCOVERYSERVICE REGISTRATION SERVICE LOOKUP SERVICE HEALTH CHECKING & API GATEWAYAPI EXPOSITION & REQUEST ROUTING AUTHENTICATION & AUTORISATION LOAD BALANCING & SHEDDING RATE LIMITING REQUEST MONITORING & AUDITING
- 34. DAS BIG PICTURE MICRO SERVICE SERVICE DISCOVERY Services registrieren Interne Services registrieren & auflösen Web Requests Routen ermitteln (per Polling) API GATEWAY Health Checks java.security.Security.setProperty("networkaddress.cache.ttl", "3" ); Web Request
- 35. SERVICE REGISTRATION IN EINEM JEE MICROSERVICE @ApplicationPath("/chuck") public class ChuckJokeApplication extends ResourceConfig { @Inject public ChuckJokeApplication( @ConsulFabio IServiceDiscovery serviceDiscovery) { super(); //Register service serviceDiscovery.registerService( "zwitscher-chuck", "/chuck/joke"); } } Service-Name URL-Pfad zum Service-Endpunkt
- 36. SERVICE REGISTRATION: HEAVY LIFTING /** * Registeres a service * * see https://github.com/eBay/fabio/wiki/Service-Configuration */ public synchronized void registerService(String serviceName, String servicePath) { String applicationHost = getOutboundHost(); int applicationPort = getOutboundPort(); HostAndPort consulEndpoint = getConsulHostAndPort(); logger.info("Will register service on host {} and port {} at consul endpoint {}", applicationHost, applicationPort, consulEndpoint.toString()); //generate unique serviceId String serviceId = serviceName + "-" + applicationHost + ":" + applicationPort; String fabioServiceTag = "urlprefix-" + servicePath; //point healthcheck URL to dropwizard metrics healthcheck servlet URL serviceUrl = UrlBuilder.empty() .withScheme("http") .withHost(applicationHost) .withPort(applicationPort) .withPath("/metrics/ping").toUrl(); // Service bei Consul registrieren inklusive einem Health-Check auf die URL des REST-Endpunkts. logger.info("Registering service with ID {} and NAME {} with healthcheck URL {} and inbound ROUTE {}", serviceId, serviceName, serviceUrl, fabioServiceTag); //use consul API to register service ConsulClient client = new ConsulClient(consulEndpoint.toString()); NewService service = new NewService(); service.setId(serviceId); service.setName(serviceName); service.setPort(applicationPort); service.setAddress(applicationHost); List<String> tags = new ArrayList<>(); tags.add(fabioServiceTag); service.setTags(tags); //register health check NewService.Check check = new NewService.Check(); check.setHttp(serviceUrl.toString()); check.setInterval(ConsulFabioServiceDiscovery.HEALTHCHECK_INTERVAL + "s"); service.setCheck(check); client.agentServiceRegister(service); } public static String getOutboundHost() { String hostName = System.getenv(HOSTNAME_ENVVAR); String host = System.getenv(HOST_ENVVAR); if (hostName == null && host == null) return DEFAULT_HOST; else if (host != null) return host; else { File etcHosts = new File("/etc/hosts"); List<String> lines; try { lines = Files.readLines(etcHosts, Charset.defaultCharset()); } catch (IOException e) { return DEFAULT_HOST; } for (String line: lines){ if (!line.trim().startsWith("#") && !line.trim().isEmpty()) { String[] etcEntry = line.split("s+"); if (etcEntry[1].equals(hostName)) return etcEntry[0]; } } return DEFAULT_HOST; } } public static int getOutboundPort() { String portEnv = System.getenv(PORT_ENVVAR); if (portEnv == null) return DEFAULT_PORT; return Integer.valueOf(portEnv); } public static HostAndPort getConsulHostAndPort() { String consulEnv = System.getenv(CONSUL_ENVVAR); if (consulEnv == null) return HostAndPort.fromString(CONSUL_DEFAULT_HOSTANDPORT); else return HostAndPort.fromString(consulEnv); } @ConsulFabio @ApplicationScoped public class ConsulFabioServiceDiscovery implements IServiceDiscovery { den Host-Namen und Port ermitteln, den Consul sieht den Health-Check Endpunkt ermitteln (MetricsServlet) Metadaten für Fabio erzeugen Service bei Consul registrieren (ebenso wie Diagnose- und Doku-Endpunkte)
- 37. ET VOILA: CONSUL MIT 3 REGISTRIERTEN SERVICE-INSTANZEN
- 38. ET VOILA: FABIO DIREKT AUS CONSUL BEDIENT
- 39. SICHT DES APPOPS CLOUD NATIVE JEE
- 40. DIE SICH SELBST AUSLIEFERNDE SOFTWARE RUNNING TESTED SOFTWARE INCREMENT EVERYTHING AS CODE: •die Anwendung •die Tests •die Infrastruktur •der CD-Workflow{
- 41. WICHTIG SIND KURZE ROUNDTRIP-ZYKLEN In-Process Local Cluster Remote Cluster •längere Roundtrips •aber: realistischer Vollständiges Deployment: Einzelne Services: https://github.com/qaware/gradle-cloud-deployer
- 42. MARATHON APP DEFINITION { "id": "/zwitscher", "groups": [ { "id": "/zwitscher/infrastructure", "apps": [ { "id": "consul", "cpus": 1, "mem": 256, "disk": 0, "instances": 1, "cmd": "/bin/consul agent -server -ui -advertise=$HOST -config-dir=/config -data-dir=/tmp/consul -bootstrap-expect=1 -node=consul-server -client=0.0.0.0", "container": { "docker": { "image": "gliderlabs/consul-server:0.6", "forcePullImage": true, "privileged": false, "network": "HOST", "portDefinitions": [ { "port": 8300, "protocol": "tcp", "name": "server-rpc" }, { "port": 8301, "protocol": "tcp", "name": "serf-lan" }, { "port": 8302, "protocol": "tcp", "name": "serf-wan" }, { "port": 8400, "protocol": "tcp", "name": "cli-rpc" }, { "port": 8500, "protocol": "tcp", "name": "http-api" }, { "port": 8600, "protocol": "udp", "name": "dns" } ], "requirePorts" : true } }, "env": { "GOMAXPROCS": "10" }, "healthChecks": [ { "protocol": "HTTP", "port": 8500, "path": "/v1/status/leader", "intervalSeconds": 10, "timeoutSeconds": 10, "maxConsecutiveFailures": 3 } ] }, { "id": "fabio", "cpus": 1, "mem": 256, "disk": 0, "instances": 1, "env": { "registry_consul_addr": "consul.infrastructure.zwitscher.marathon.mesos:8500" }, "container": { "docker": { "image": "magiconair/fabio:latest", "forcePullImage": true, "privileged": false, "network": "HOST", "portDefinitions": [ { "port": 9998, "protocol": "tcp", "name": "web-ui" }, { "port": 9999, "protocol": "tcp", "name": "proxy-port" } ], "requirePorts" : true } }, "acceptedResourceRoles":["slave_public"], "healthChecks": [ { "protocol": "HTTP", "port": 9998, "path": "/health", "intervalSeconds": 10, "timeoutSeconds": 10, "maxConsecutiveFailures": 3 } ] } ] }, { "id": "/zwitscher/services", "apps": [ { "id": "zwitscher-chuck", "cpus": 1, "mem": 256, "disk": 0, "instances": 1, "container": { "docker": { "image": "adersberger/zwitscher-app-chuck:1.0.0-SNAPSHOT", "forcePullImage": true, "privileged": false, "network": "HOST", "portDefinitions": [ { "port": 12340, "protocol": "tcp", "name": "rest-api" } ], "requirePorts" : true } }, "env": { "PORT": "12340", "CONSUL": "consul.infrastructure.zwitscher.marathon.mesos:8500", "CONFIG_ENV" : "zwitscher" }, "args": [ "-Xmx256m" ], "healthChecks": [ { "protocol": "HTTP", "port": 12340, "path": "/metrics/ping", "intervalSeconds": 10, "timeoutSeconds": 10, "maxConsecutiveFailures": 3 } ], "dependencies": [ "/zwitscher/infrastructure/consul" ] } ] } ] } marathon-appgroup.json /zwitscher /infrastructure /consul /fabio /service /zwitscher-chuck dependency "healthChecks": [ { "protocol": “HTTP", "port": 9998, "path": "/health", "intervalSeconds": 10, "timeoutSeconds": 10, "maxConsecutiveFailures": 3 } ] Health Checks: "network": "HOST", "ports": [9998, 9999], "requirePorts" : true Networking: "acceptedResourceRoles":["slave_public"] API Gateway auf den Public Slaves: "env": { "PORT": "12340", "CONSUL": "consul.infrastructure.zwitscher.marathon.mesos:8500" }, "args": ["-Xmx256m"] Konfiguration: "container": { "docker": { "image": "adersberger/zwitscher-app-chuck:1.0.0-SNAPSHOT", "forcePullImage": true Immer das aktuelle Docker Image bekommen: "dependencies": [ "/zwitscher/infrastructure/consul"] Startup-Abhängigkeiten (eher zu vermeiden):
- 44. FAZIT ▸ Cloud Native JEE Anwendungen entwickeln ist möglich und macht Spaß ▸ Die JEE API ist per se noch nicht Cloud Native und wird dies auf absehbare Zeit auch nicht sein, kann aber entsprechend ergänzt werden, z.B. mit unserem JCloudEE Mini-Framework: ▸ Kurze Roundtrip-Zeiten sind essenziell für die produktive Entwicklung von Anwendungen. Bei Cloud Native Applications ist dabei die volle Portabilität von lokaler Ausführung bis auf ein Cluster in der Cloud essenziell.
- 45. 45 CompletableFuture<SoftwareArchitektIn> ich = CompletableFuture.supplyAsync(() -> erfindergeist() .handwerksstolz() ); CompletableFuture<Projekthaus> qaware = CompletableFuture.supplyAsync(() -> professionalität() .lässigkeit() ); Erfolg start = qaware.thenCombine(ich, (i, q) -> i.sendeBewerbung(q)) .join(); Weiter Details unter http://www.qaware.de/karriere/#jobs