Microservices from dream to reality in an hour - Dr. Holly Cummins
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© 2015 IBM Corporation Holly Cummins @holly_cummins Microservices
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Transcript of Microservices from dream to reality in an hour - Dr. Holly Cummins
© 2015 IBM Corporation
Holly Cummins @holly_cummins
Microservices
© 2015 IBM Corporation
Holly Cummins @holly_cummins
Microservices
@holly_cummins#microservicesdream
@holly_cummins#microservicesdream
?
@holly_cummins#microservicesdream
@holly_cummins#microservicesdream
@holly_cummins#microservicesdream
@holly_cummins#microservicesdream
@holly_cummins#microservicesdream
@holly_cummins#microservicesdream
@holly_cummins#microservicesdream
Monolithic application
ModularityMonolithic application
Monolithic application
Monolithic application
Scaling
Monolithic application
Monolithic application
Failing
Monolithic application
Failing
Monolithic application
Failing
Monolithic application
Failing
Monolithic application
Failed
Monolithic application
Update
Monolithic application
Update
Monolithic application
Update
Monolithic application
Update
Monolithic application
Update
Monolithic application
Update
Monolithic application
Update
Monolithic application
Revolution
Monolithic application
Revolution
Cat-astrophe
Oops.
Oops.
Microservices application
ModularityMicroservices application
Microservices application
InteractionsMicroservices application
Microservices application
ScaledMicroservices application
ScaledMicroservices application
ScaledMicroservices application
ScaledMicroservices application
Microservices application
EvolutionMicroservices application
EvolutionMicroservices application
EvolutionMicroservices application
EvolutionMicroservices application
Datacentre in a handbag
What, no Docker?
Distributed computing fallacies
Distributed computing fallacies
“Inconceivable!”
Distributed computing fallacies
“Inconceivable!”
“You keep saying that. I dinna think it means what you think it means.”
Complexity
You need DevOps
You need 100% automation
#microservicesdream @holly_cummins
–Holly Cummins
“…die Codebasis aufbrechen, ohne sie zu zerbrechen…”
Slice it up!
Slice it up!
Slice it up!HTTP HTTP
HTTP
HTTP HTTP
HTTP
Peel it off.
REST REST
REST
REST REST
Message
REST REST
REST
Exposing a service in a monolith
@ApplicationScopedpublic class CatRepository {!
public Set<MiniCat> getAllCats() {
Exposing a microservice
@Path("cat")public class CatRepository {!
@Path("allcats") @Produces(MediaType.APPLICATION_JSON) @GET public Set<Cat> getAllCats() { …
@Path("cat")public class CatRepository {!
@Path("allcats") @Produces(MediaType.APPLICATION_JSON) @GET public Set<Cat> getAllCats() { …
JAXRS=magic
Consuming a service in a monolith
!
@Inject CatRepository catRepo; ... Set<Cat> cats = catRepo.getAllCats();
Client client = ClientBuilder.newClient();WebTarget target = client.target(“http://localhost:9080") .path(“catastrophe.cats/rest/cat/cats");Set<Cat> cats = target.request(MediaType.APPLICATION_JSON) .get(new GenericType<Set<Cat>>(Set.class));
Consuming a microservice
@holly_cummins#microservicesdream
Very nice. Does it actually work?
@holly_cummins#microservicesdream
Very nice. Does it actually work?
http://raspberrypiclearcase.local:9083/catastrophe.scoring.auth/rest/auth/leaderboard
Don’t forget to slice up the database too
REST REST
REST
REST REST
REST
Network topology
Network topology
ip address: ?.?.?.?
Network topology
ip address: ?.?.?.?
ip address: ?.?.?.?
Network topology
ip address: ?.?.?.?
ip address: ?.?.?.?
ip address: ?.?.?.?
Network topology
ip address: ?.?.?.?
ip address: ?.?.?.?
ip address: ?.?.?.?
ip address: ?.?.?.?
Network topology
ip address: ?.?.?.?
ip address: ?.?.?.?
ip address: ?.?.?.?
ip address: ?.?.?.?
ip address: ?.?.?.?
Network topology
ip address: special
ip address: precious
ip address: bespoke
ip address: lovely
ip address: fave
Network topology
ip address: special
ip address: precious
ip address: bespoke
ip address: fave
Disposability
Disposability
Scaling
ip address: special
ip address: precious
ip address: bespoke
ip address: fave
ip address: lovely
Scaling
ip address: special
ip address: precious
ip address: bespoke
ip address: fave
ip address: lovely
ip address: lonely
Scaling
ip address: special
ip address: precious
ip address: bespoke
ip address: fave
ip address: lovely
ip address: lonely
Service discovery
• Kubernetes
• Apache Zookeeper + Curator
• Eureka
• etcd
• Consul
Service discovery
• Kubernetes
• Apache Zookeeper + Curator
• Eureka
• etcd
• Consul
Docker
Service discovery
• Kubernetes
• Apache Zookeeper + Curator
• Eureka
• etcd
• Consul
Docker
Java
Service discovery
• Kubernetes
• Apache Zookeeper + Curator
• Eureka
• etcd
• Consul
AWS
Docker
Java
SoftLayer
Service discovery
• Kubernetes
• Apache Zookeeper + Curator
• Eureka
• etcd
• Consul
AWS
CoreOS
Docker
Java
SoftLayer
Service discovery
• Kubernetes
• Apache Zookeeper + Curator
• Eureka
• etcd
• Consul
AWS
CoreOS
Docker
Java
DNS HTTP Java
SoftLayer
Cat-astrophe
Cat-astropheREST REST
REST
Cat-astrophe
Consul
REST REST
REST
Cat-astrophe
Discovery
Discovery
Discovery
Consul
REST REST
REST
<featureManager> <feature>jaxrs-1.0</feature>
<featureManager> <feature>jaxrs-1.0</feature>
Server configuration
<featureManager> <feature>jaxrs-1.0</feature> <feature>usr:discovery</feature> …
<consul server="catastrophe.cat" />
Server configuration
<featureManager> <feature>jaxrs-1.0</feature> <feature>usr:discovery</feature> …
<consul server="catastrophe.cat" />
Wouldn’t this be nice?
Server configuration
Liberty extension
(“user feature”)
Liberty extension
(“user feature”)
Auto-publishes REST
endpoints
Liberty extension
(“user feature”)
Auto-publishes REST
endpoints
Liberty extension
(“user feature”)
I
WebSphere Liberty extensibility
public String getHostAndPort(String serviceName) {! List<CatalogService> services = client.getCatalogService(serviceName, QUERY_PARAMS).getValue(); int numServices = services.size(); if (numServices > 0) { // Do a simple random-robin :) int index = RANDOM.nextInt(numServices); CatalogService service = services.get(index); return service.getServiceAddress() + ":" + service.getServicePort(); } else { System.out.println("No services available with name " + serviceName); }
@holly_cummins#microservicesdream
http://raspberrypi.local:9080/catastrophe.web
#microservicesdream @holly_cummins
–Johnny Appleseed
“Type a quote here.”
@holly_cummins#microservicesdream
https://console.eu-gb.bluemix.net
@holly_cummins#microservicesdream
http://catastropheweb.eu-gb.mybluemix.net/catastrophe.web/
Are we done?
@holly_cummins#microservicesdream
www.wasdev.net
!
Any questions? !
!bluemix.net
@holly_cummins
