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Microservices from dream to reality in an hour - Dr. Holly Cummins
- 1. © 2015 IBM Corporation Holly Cummins @holly_cummins Microservices
- 2. © 2015 IBM Corporation Holly Cummins @holly_cummins Microservices
- 31. Cat-astrophe
- 33. Oops.
- 34. Oops.
- 56. What, no Docker?
- 59. Distributed computing fallacies “Inconceivable!” “You keep saying that. I dinna think it means what you think it means.”
- 60. Complexity
- 61. You need DevOps
- 63. #microservicesdream @holly_cummins –Holly Cummins “…die Codebasis aufbrechen, ohne sie zu zerbrechen…”
- 64. Slice it up!
- 65. Slice it up!
- 66. Slice it up! HTTP HTTP HTTP
- 67. HTTP HTTP HTTP Peel it off.
- 68. REST REST REST
- 70. REST REST REST
- 71. Exposing a service in a monolith @ApplicationScoped public class CatRepository { ! public Set<MiniCat> getAllCats() {
- 72. Exposing a microservice @Path("cat") public class CatRepository { ! @Path("allcats") @Produces(MediaType.APPLICATION_JSON) @GET public Set<Cat> getAllCats() { …
- 73. @Path("cat") public class CatRepository { ! @Path("allcats") @Produces(MediaType.APPLICATION_JSON) @GET public Set<Cat> getAllCats() { … JAXRS=magic
- 74. Consuming a service in a monolith ! @Inject CatRepository catRepo; ... Set<Cat> cats = catRepo.getAllCats();
- 75. 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
- 76. @holly_cummins#microservicesdream Very nice. Does it actually work?
- 77. @holly_cummins#microservicesdream Very nice. Does it actually work? http://raspberrypiclearcase.local:9083/ catastrophe.scoring.auth/rest/auth/leaderboard
- 78. Don’t forget to slice up the database too
- 79. REST REST REST
- 80. REST REST REST
- 81. Network topology
- 82. Network topology ip address: ?.?.?.?
- 83. Network topology ip address: ?.?.?.? ip address: ?.?.?.?
- 84. Network topology ip address: ?.?.?.? ip address: ?.?.?.? ip address: ?.?.?.?
- 85. Network topology ip address: ?.?.?.? ip address: ?.?.?.? ip address: ?.?.?.? ip address: ?.?.?.?
- 86. Network topology ip address: ?.?.?.? ip address: ?.?.?.? ip address: ?.?.?.? ip address: ?.?.?.? ip address: ?.?.?.?
- 87. Network topology ip address: special ip address: precious ip address: bespoke ip address: lovely ip address: fave
- 88. Network topology ip address: special ip address: precious ip address: bespoke ip address: fave
- 90. Disposability
- 91. Disposability
- 92. Scaling ip address: special ip address: precious ip address: bespoke ip address: fave ip address: lovely
- 93. Scaling ip address: special ip address: precious ip address: bespoke ip address: fave ip address: lovely ip address: lonely
- 94. Scaling ip address: special ip address: precious ip address: bespoke ip address: fave ip address: lovely ip address: lonely
- 95. Service discovery • Kubernetes • Apache Zookeeper + Curator • Eureka • etcd • Consul
- 96. Service discovery • Kubernetes • Apache Zookeeper + Curator • Eureka • etcd • Consul Docker
- 97. Service discovery • Kubernetes • Apache Zookeeper + Curator • Eureka • etcd • Consul Docker Java
- 98. Service discovery • Kubernetes • Apache Zookeeper + Curator • Eureka • etcd • Consul AWS Docker Java SoftLayer
- 99. Service discovery • Kubernetes • Apache Zookeeper + Curator • Eureka • etcd • Consul AWS CoreOS Docker Java SoftLayer
- 100. Service discovery • Kubernetes • Apache Zookeeper + Curator • Eureka • etcd • Consul AWS CoreOS Docker Java DNS HTTP Java SoftLayer
- 101. Cat-astrophe
- 108. <featureManager> <feature>jaxrs-1.0</feature> <feature>usr:discovery</feature> … <consul server="catastrophe.cat" /> Server configuration
- 109. <featureManager> <feature>jaxrs-1.0</feature> <feature>usr:discovery</feature> … <consul server="catastrophe.cat" /> Wouldn’t this be nice? Server configuration
- 115. Auto-publishes REST endpoints Liberty extension (“user feature”) I WebSphere Liberty extensibility
- 117. 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); }
- 119. #microservicesdream @holly_cummins –Johnny Appleseed “Type a quote here.”
- 122. Are we done?