When Cloud-Native Java meets Containers, Kubernetes and Istio
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The document discusses the integration of cloud-native Java with containers, Kubernetes, and Istio, providing an overview of each component's role in creating microservice applications. It highlights the benefits of using microprofile for application behavior, observability, and security, alongside Kubernetes for orchestration and Istio for traffic management. Additionally, it lists the twelve factors of cloud-native applications and offers resources for further exploration.
![Cloud-Native Java
Java-based
programming
paradigm that is native
or optimized for a
cloud environment
Containers
“A container is a
standard unit of
software that
packages up code and
all its dependencies so
the application runs
quickly and reliably
from one computing
environment to
another.”
- Docker.com
Kubernetes
“Kubernetes (K8s) is
an open-source
system for automating
deployment, scaling,
and management of
containerized
applications.”
- Kubernetes.io
Istio
“… service mesh is …
the network of
microservices that
make up [distributed
microservice]
applications and the
interactions between
them.
… Istio provides
behavioral insights
and operational
control over the
service mesh as a
whole, offering a
complete solution to
satisfy the diverse
requirements of
microservice
applications.”
- Istio.io© 2020 IBM Corporation 2](https://image.slidesharecdn.com/think2020-whencloud-nativejavameetscontainerskubernetesandistio-recording-201014145050/85/When-Cloud-Native-Java-meets-Containers-Kubernetes-and-Istio-2-320.jpg)
When Cloud-Native Java meets Containers, Kubernetes and Istio
- 1. When Cloud-Native Java meets Containers, Kubernetes and Istio — Yee-Kang Chang yeekangc@ca.ibm.com @yeekangc
- 2. Cloud-Native Java Java-based programming paradigm that is native or optimized for a cloud environment Containers “A container is a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another.” - Docker.com Kubernetes “Kubernetes (K8s) is an open-source system for automating deployment, scaling, and management of containerized applications.” - Kubernetes.io Istio “… service mesh is … the network of microservices that make up [distributed microservice] applications and the interactions between them. … Istio provides behavioral insights and operational control over the service mesh as a whole, offering a complete solution to satisfy the diverse requirements of microservice applications.” - Istio.io© 2020 IBM Corporation 2
- 3. 3 Cloud-Native Microservices 1. RESTful – Like cattle not pet, communicative 2. Configurable 3. Fault tolerant 4. Discoverable 5. Secure 6. Observable 7. Cloud ready – Heartbeat with cloud infrastructure
- 4. Eclipse MicroProfile Config Fault Tolerance JWT Health Check MetricsOpen Tracing Open API JAX-RSJSON-PCDIRest Client JSON-B REST Foundation 100s of Microservices Operation Focus
- 5. Microservice Deployment Config Fault Tolerance JWT Health Check MetricsOpen Tracing Open API JAX-RSJSON-PCDIRest Client JSON-B
- 6. Eclipse MicroProfile Config Fault Tolerance JWT Health Check MetricsOpen Tracing Open API JAX-RSJSON-PCDIRest Client JSON-B REST Foundation 100s of Microservices Operation Focus
- 7. 7 MicroProfile Config with Kubernetes A B env: - name: GREETING valueFrom: configMapKeyRef: name: greeting-config key: message kubectl create configmap greeting-config --from-literal message=Greetings... @Inject @ConfigProperty(name = "GREETING") private String greeting;
- 8. 8 MicroProfile Health with Kubernetes A B readinessProbe: httpGet: path: /health/ready port: 9080 initialDelaySeconds: 15 periodSeconds: 5 failureThreshold: 1
- 9. 9 MicroProfile Metrics with Kubernetes A B @POST @Counted(name="order", displayName="Order count", description="Number of times orders requested.") public Response orderCoffee(@Valid @NotNull CoffeeOrder order) { ... } Data in OpenMetrics format Collect and store data with Prometheus Visualize data with Grafana
- 10. 10 MP OpenTracing with Kubernetes A B @Traced public void startBrew(CoffeeType coffeeType) { ... } JAX-RS methods are automatically traced by default Distributed tracing system that supports OpenTracing data Deploy and view traces with Zipkin or Jaeger
- 11. 11 MicroProfile and Istio MicroProfile Istio Traffic Management N/A Routing rules • Use Istio for Blue-Green deployments, canary rollouts etc Fault Tolerance Application layer Retry, Timeout, Circuit Breaker, Bulkhead, Fallback Traffic between services Retry, Timeout, Circuit Breaker, Bulkhead • Istio for broader traffic management (and fault injection for testing) • Application-level fallback with MicroProfile Security Secure services with JWT Mutual TLS for transport Origin authentication with JWT • Use Istio’s origin authentication if services are not secured Observability or Telemetry API to instrument apps Roll your own Prometheus, Grafana, Zipkin, Jaeger etc Integration with Prometheus, Grafana, Jaeger, Zipkin • OOTB integration between MP-based services and Istio • View service mesh with Istio’s Kiali
- 12. THE 12 FACTORS 1. Codebase 2. Dependencies 3. Config 4. Backing Services 5. Build, Release, Run 6. Processes 7. Port binding 8. Concurrency 9. Disposability 10.Dev / Prod parity 11.Logs 12.Admin Processes THE 12 FACTORS 1. Codebase 2. Dependencies 3. Config 4. Backing Services 5. Build, Release, Run 6. Processes 7. Port binding 8. Concurrency 9. Disposability 10.Dev / Prod parity 11.Logs 12.Admin Processes
- 13. Istio to manage the services … Cloud-Native Java programming model like MicroProfile to code application behaviours easily for Cloud! Kubernetes to orchestrate the environment … Containerize your applications … Cloud-Native Java + Containers, Kubernetes and Istio = A Nice Match © 2020 IBM Corporation 13
- 14. Resources Further reading MicroProfile, the microservice programming model made for Istio https://www.eclipse.org/c ommunity/eclipse_newsle tter/2018/september/Micr oProfile_istio.php Try it out Configuring microservices in Kubernetes https://openliberty.io/guid es/kubernetes- microprofile-config.html Checking the health of microservices on Kubernetes https://openliberty.io/guid es/kubernetes- microprofile-health.html Managing microservice traffic using Istio https://openliberty.io/guid es/istio-intro.html Sample implementation https://github.com/ibm- cloud- architecture/refarch- cloudnative- kubernetes/blob/micropro file/docs/istio.md © 2020 IBM Corporation 14