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Chicago JUG / GOTO Meetup
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- 3. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Speaker QualificaKons – Ed Burns • 25 Years SoXware Development Experience – NCSA Mosaic è Marathon and much in between – Spec Lead for Java EE Servlet and JSF • Informal spare Kme trainer • Author of four IT-related books for McGraw-Hill
- 4. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Speaker QualificaKons – Ed Burns • The PerspecKve I offer – On the front lines of the disrupKon caused by the shiX to cloud naKve development – I work on things that have historically enabled “The Monolith” • Java EE: JSF, Servlet • App Servers: GlassFish and WebLogic – I understand the need to adapt to changing developer requirements • I also understand the perils of chasing the shiny new thing • Blog hdp://ridingthecrest.com/blog/
- 5. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | The New Stack • Economic forces are driving the move to the cloud – More efficiency • The commodiKzaKon of runKmes is nearly complete – CPU/Storage/Network: all virtual, all billable per-use – Several choices of vendors • Much of the funcKon of an IT department can be codified into a Service Level Agreement and purchased from a cloud vendor – “SoXware defined data center”
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- 10. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Two Paths for Cloud NaKve Enterprises • You’re sKll going to need a lot of support technology in either approach • Build System • CI/CD Pipeline – TesKng • ArKfact management • Version Control – Source code – Binary code
- 11. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | The ExisKng Java EE Stack is SKll Useful • One of the only two games in town before cloud disrupKon, the other being .NET • Structured when Structured wasn’t cool • What is a monolithic app? That usually means “app server”. – You get a lot of benefits with the app server • Simplified deployment model: some collecKon of WAR/EAR files • Easy ORM: JPA database connecKon • Easy redundancy: clustering support • Easy load balancing • Easy TransacKonality: JTA • Statefulness • Reliability • Debugability and logging
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- 16. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | New Stack Rewards • ContainerizaKon – Package dependencies • Resiliency – Beder upKme – Beder response Kme • Enable things such as eventual consistency and CQRS • Beder embrace iteraKon lifestyle
- 17. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | How to Get Ready • You have to be more of a generalist • There is no more “throwing it over the wall”, everyone has to think like a sysadmin • Study up on Linux Sysadmin skills – Systemd iniKalizaKon tool – Package management and proxy navigaKon – Networking, including the OSI protocol stack – Get some familiarity with Ansible • Study up on build systems • Study up on arKfact management systems • Study up on JVM tuning arguments
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- 19. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Conceptual Layout Foundation Layer Support Layer BusinessLayer Your code goes here But with DevOps, you must understand here… … and here
- 20. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Quick Tour of the Stack: FoundaKon Layer • OperaKng System – networking • Node management • ContainerizaKon • Scheduling of high level processes • Load balancing • Binary arKfact management • GNU/Linux – SDN • Apache Mesos • Docker • Marathon • NGINX • ArKfactory Conceptual Layout One Possible Concrete Implementa5on Layout
- 21. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Quick Tour of the Stack: Support Layer • Logging • Telemetry • Lightweight Persistence • Heavyweight Persistence • IdenKty and Secret Management • ELK • Prometheus • Etcd • NoSQL DB (MongoDB) • Hashicorp Vault Conceptual Layout One Possible Implementa5on Layout
- 22. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Quick Tour of the Stack: Business Layer • ContainerizaKon technology • Interchange technology • Programming Language • Docker • REST (JAX-RS/Jersey) • Java 8 Conceptual Layout One Possible Implementa5on Layout
- 23. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Aside: Which Container Technology? • Docker vs Rkt (pronounced rock-it) – hdps://coreos.com/blog/rkt-accepted-into-the-cncf.html – hdp://containerops.org/2014/12/19/docker-vs-rocket-gimme-a-break/ – hdps://medium.com/@adriaandejonge/moving-from-docker-to- rkt-310dc9aec938#.szvh6atkt – Rkt can run Docker images • Converts container to appc format • CoreOS (maker of rkt) and Docker – Open Container IniKaKve hdps://www.opencontainers.org/ • Image SpecificaKon • RunKme SpecificaKon
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- 25. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | The Moving Parts of the Stack: FoundaKon Layer • Apache Mesos hdp://mesos.apache.org/ – Allows abstracKng a computer as • CPU/Memory/IO/Storage – Allows starKng and stopping containers: containerizer • Support for Docker, rkt and appc containers – Runs as a “mesos cluster” • Three kinds of nodes – Master (at least one) – Slave (at least one) – Zookeeper (cluster) (at least one, but it can run as a cluster)
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- 27. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | The Moving Parts of the Stack: FoundaKon Layer • Marathon hdps://mesosphere.github.io/marathon/ • Has a REST API for gezng its work done – hdps://mesosphere.github.io/marathon/docs/rest-api.html – There is a not maintained Java API to this rest client hdps://github.com/mohitsoni/marathon-client • Can build your own orchestrator on top of it
- 28. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | The Moving Parts of the Stack: FoundaKon Layer • Demo: Show foundaKon layer running using docker maven plugin Thanks Manfred Riem <hdp://www.manorrock.com/blog/> – ReplicaKon of some part of producKon env – It is also runnable under CI – Review pom.xml • address uid/gid permissions issues • address docker network issues – Review deployment json – Need to access logs in a special way • Can’t simply docker logs –f <hash> • docker exec into mesos slave • cd /var/tmp/mesos/slaves/*/frameworks/*/executors/mycontainer8g*/runs/latest and tail -f stderr|stdout
- 29. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | The Moving Parts of the Stack: Support Layer • A wide collecKon of off-the-shelf support services, running on top of the foundaKon layer • Look at Three Specific Examples – NGINX – ELK + FileBeat – Etcd • Other Services – Services to enable security in the Business Layer
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- 31. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Running the Stack: Maven • Demo: Show foundaKon layer running using docker maven plugin Thanks Manfred Riem hdp://www.manorrock.com/blog/ • Plugins with InteresKng Uses – maven-antrun-plugin • Convey current UID/GID all the way through to the Docker running the workloads • Assemble the individual service Marathon deployment descriptors into one json file • Use curl to install the Business Layer app before tesKng and remove it aXer tesKng – maven-resources-plugin • Template properKes into json files for ports, variables, configuraKon – Fabric8 docker-maven-plugin • Stand up foundaKon layer, note hard-coded network values
- 32. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | Running the Stack: Maven • Demo: Show foundaKon layer running using docker maven plugin Thanks Manfred Riem hdp://www.manorrock.com/blog/ • Plugins with the Usual Uses – maven-compiler-plugin – maven-deploy-plugin – maven-failsafe-plugin • Able to use standard Junit with Jersey Client to assert correctness of Business layer app • Need to pass system properKes for endpoint locaKon – maven-javadoc-plugin – maven-source-plugin
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- 34. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | 34 Java EE 7 Connector JAXB JSP Debugging Managed Beans JSP Concurrency EE Interceptors JAX-WS WebSocket Bean ValidaKon JASPIC Servlet JMS JTA Deployment Batch JACC Dependency InjecKon JAXR JSTL Management CDI EJB JAX-RPC Web Services JSF Java Persistence JSON-P Common AnnotaKons EL JAX-RS Web Services Metadata JavaMail CDI JSON-B Security Bean ValidaKon JSF JAX-RS JSON-P Servlet Java EE 8 Will Be Available by JavaOne 2017! JSP
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