TODO Application

• TODO Application
  • Development Mode
  • Build and Deploy with OpenShift
    • Build and Deploy
      • Dev Console
      • CLI
    • Kustomize
  • User Workload Monitor
  • GitOps with ArgoCD

Development Mode

• Navigate to directory todo or todo-reactive

• Database container is configured automatically with Zero Config Setup (DevService). Check application.properties that there is no database URL, user and password specified in default and ve profile.

  mvn quarkus:dev

  Output

  ...
  11:42:17 INFO  [or.te.DockerClientFactory] (build-37) Ryuk started - will monitor and terminate Testcontainers containers on JVM exit
  11:42:17 INFO  [or.te.DockerClientFactory] (build-37) Checking the system...
  11:42:17 INFO  [or.te.DockerClientFactory] (build-37) ✔︎ Docker server version should be at least 1.6.0
  11:42:18 INFO  [or.te.DockerClientFactory] (build-37) ✔︎ Docker environment should have more than 2GB free disk space
  11:42:18 INFO  [🐳.2]] (build-37) Creating container for image: postgres:13.2
  11:42:18 INFO  [🐳.2]] (build-37) Starting container with ID: 0040a40f1bbe0f583455d047ba3abf6e0cd7d9718fec342f9bb0a3fdf46bc315
  11:42:19 INFO  [🐳.2]] (build-37) Container postgres:13.2 is starting: 0040a40f1bbe0f583455d047ba3abf6e0cd7d9718fec342f9bb0a3fdf46bc315
  11:42:22 INFO  [🐳.2]] (build-37) Container postgres:13.2 started in PT4.512469S
  ...

• Open URL http://localhost:8080 with your browser

• Test RESTful API

  • Create new todo item

     curl -H "Content-type: application/json" \
     --data "@sample.json" -v \
      http://localhost:8080/api

  • List all todo items

     curl -v localhost:8080/api

  • Delete todo number 1

    curl -v -X DELETE http://localhost:8080/api/1

Build and Deploy with OpenShift

Build and Deploy

Dev Console

• Deploy PostgreSQL Database. Add->Database, Select PostgreSQL

    | Parameter                      | Value        | 
    |--------------------------------|--------------|
    | Database Service Name          | todo-db      | 
    | PostgreSQL Connection Username | todo         | 
    | PostgreSQL Connection Password | todoPassword |  
  

• Build and deploy todo app from Git

  • Add->From Git

  • Git Repository: https://github.com/voraviz/quarkus-todo-app and select Show Advanced Git Option

    | Parameter                      | Value        | 
    |--------------------------------|--------------|
    | Context dir        | todo      | 
    | Application Name | todo-app         | 
    | Name| todo | 
    

    • Select Route option

    • Select Build Configuration to add environment variables

      Environment variables (build and runtime)	Value
      QUARKUS_PACKAGE_TYPE	uber-jar

CLI

• PostgreSQL Database

  oc create -f kustomize/base/todo-db.yaml

• Todo App

  oc new-app --name todo \
  ubi8-openjdk-11:1.3~https://github.com/voraviz/quarkus-todo-app \
  --context-dir=todo --build-env=QUARKUS_PACKAGE_TYPE=uber-jar \
  --labels=app=todo --allow-missing-images
  oc logs -f buildconfig/todo
  oc expose svc todo

  or build by YAML

  oc create -f etc/todo-build.yaml
  oc logs -f bc/todo
  oc new-app --name=todo --image-stream=todo:latest --labels=app=todo
  oc expose svc/todo

Kustomize

• Deploy with Kustomize

  oc create -k kustomize/overlays/dev
  watch oc get pods

  

User Workload Monitor

• Enable User Workload Monitor
• Create service monitor to monitor todo app

  • Create Service Monitor

    oc apply -f etc/deploy/service-monitor.yaml 

  • Scale todo to 2 pods

    oc scale deployment/todo --replicas=2

  • Run following command to gererate workload to getAll method

    siege -c 5 -t 5m -d 1 http://$(oc get route/todo -o jsonpath='{.spec.host}')/api

  • Developer Console, Monitoring->Metrics->Custom Query and select checkbox Stacked

    rate(application_io_quarkus_sample_TodoResource_countGetAll_total[1m])

    

GitOps with ArgoCD

WIP