Arun Gupta - Refactor your Java EE application using Microservices and Containers

 https://www.youtube.com/watch?v=Jogdz6gvodU&list=WL&index=80&t=720s&ab_channel=Codemotion

 

 

 

 X-Axis   sclalate clone

 Y-Axis   Functionality

 Z-Axis   shardering stread load from different locations Europe, Asia, America

 

1.- Prepare to Containter

 

User                             show booking                                     database

interface                                 

                                    Add/Delete Movie

                                    Ticket Sales

                                    Movie Points

                                    Chat Room

Web Pages        Classes                Config Files

 

 

2.- WAR--> EAR

3.- EAR  --> WAR

4.- WAR in Container

5.- WAR: Scale on X-axis or Y-axis

 

 NoOps

 

- Service Replication (Kubernets)

- Dependency Resolution (Nexus)

- Failover (Circuit Breaker)

- Resiliency (Hystrix) 

- Service Monitoring, alerts and events (logstash)

Docker

Pocket Once Deploy Anywhere (PODA)

80% written in GO

Uses several linux features

  - Namespaces to provide isolation

  - Control groups to share/limit  hardware resource

  - Union File systems makes it light and fast

 - libcontainer  defines container format

-------------------------------------

FROM fedore:latest

CMD echo "Hello World"

-------------------------------------

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FROM jboss/wildfly

RUN curl -L https://github.com/javaee-samples/javaee7-hol/raw/master/solution/

movieplex7-1.0-SNAPSHOT.war -o /opt/jboss/wildfly/standalone/deployments/

movieplex7-1.0-SNAPSHOT.war

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Kubernetes

 

Open source orchestration system for Docker containers

 

"desire state" self-heaing, auto-restarting, schedule across hosts, Replicating

 

Concepts

 

Pods: collocated group of Docker containers that share an IP and storage volume.

 

             - C1 --- C2 -           --- C3 ------

              ---- Pod1----          --- Pod2 ---

              ----------- Docker ----------------

 

Service: Single, stable name for a set of pods, also acts as LB

                          Sevice WEB

                            |         |

                port 8080     port 8080

                           |               |

                    JBoss         JBoss

                    Pod1          Pod2

Replication Controller: manages the lifecycle of pods

 and ensure specified number are running

Label: Uses for organaze and select group of objects

Sample of implementation

OpenShift

                                                               Sevice WEB

                                                                   |         |

                                                       port 80     port 80

                                                                |               |

                                                          Apache      Apache

                                                           Pod1          Pod2

 

                         JavaEE                             DataBase                                  MessageQueue

                            |         |                              |         |                                         |         |

                port 8080     port 8080     port 3306     port 3306                port 8161     port 8161

                           |               |                       |               |                                   |               |

                    JBoss         JBoss             MySql      MySql                   ActiveMQ    ActiveMQ                                           Pod3          Pod4               Pod5          Pod6                       Pod7          Pod8

His Environment

 

            openshift origin

 

            User Experience                OpenShift   WildFly

   

         Cluster Management             Kubernetes

 

            Container                            Docker

 

         Container Host                      RedHat     Atomic Now PodMan

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