Spring Boot Microservice on Kubernetes
MicroK8s used in this example is free, lightweight Pure Kubernetes solution that we can install on our our laptops and enjoy full Kubernetes edge experience.
Generate Spring Boot Application
curl https://start.spring.io/starter.tgz -d artifactId=k8s-demo-app -d name=k8s-demo-app -d packageName=services.objex.demo -d dependencies=web,actuator -d javaVersion=11 | tar -xzf -Add a RestController
Modify K8sDemoApplication.java and add a @RestController
package services.objex.demo;import…
Apigee enables you to create APIs and share them with other developers who might be part of your organization or who might be external, or even unknown. API teams using Apigee achieve this by combining APIs into “API products” that offer different capabilities and levels of service. …
Monitor Kafka with Prometheus + Grafana
Monitoring Kafka
Yolean Kafka is one of the simplest Kubernetes container-based Kafka solution in the market to get started with.
Yolean Kafka JMX Metrics Prometheus Exporter
This following adds a sidecar to the broker pods that exports selected JMX metrics over HTTP in a format that Prometheus understands. …
HubSpot
HubSpot offers a suite of online marketing, sales, and CRM software products. As a growing company, we had a need for a CRM solution. After comparing different products we decided to use HubSpot as our CRM tools. Their CRM offering does not cost anything so why not.
Hashicorp Vault on GKE Best Practices
Isolate the installation with single tenancy.
You can host Vault on Google Kubernetes Engine (GKE) or Compute Engine, but it should be completely isolated in its own project, cluster, and/or private VPC/subnet. If running on Compute Engine, Vault should be the only main process running on a machine. This reduces the risk that another process running…
A simple solution to an annoying GCE Docker Issue
Issue
Kubernetes schedules a pod at node level (GCE) and kubelet on node uses Docker to download an image and run it.
Docker uses system DNS to resolve the address of a registry, because it works right on the GCE node, not in the Kubernetes. …
API First
When implementing capabilities, the design of the services must start with the externally visible service contract specification (the API). An API is a contract that all parties needs to exactly follow. Changing such a contract is always difficult. This makes the design stage of an API extremely important.
OpenAPI 3.0
Microservices are a modular architecture approach that is driven by domain driven design principles and organization’s communication structure.
Characteristics
Size
The size of service matters. Microservices meant to be “micro” in nature.
Modularization
Microservices are developed in a modular fashion. Teams develop software in modules. …
Mazhar Choudhry
CEO Objex (https://objex.tech), Rabbito.io (https://rabbito.io) and HBHM (https://hbhm.org)
