HOW TO USE DOCKER AND KUBERNETES HOW TO
HOW TO USE DOCKER AND KUBERNETES CODE
HOW TO USE DOCKER AND KUBERNETES SERIES

It holds key-value pairs of configuration data that can be consumed in pods or used to store configuration data. When using Spring Cloud, the most obvious choice for realizing a distributed configuration in your system is Spring Cloud Config. Inject the Configuration With Config Maps and Secrets $ oc policy add-role-to-user cluster-reader system:serviceaccount:myproject:defaultР”Р„pp: mongodb 1. If you deploy your microservices on Minishift, you should first enable admin-user add-on, then log in as a cluster admin and grant the required permissions. $ kubectl create clusterrolebinding admin -clusterrole=cluster-admin -serviceaccount=default:default If you use Kubernetes, you should just execute the following command: Spring Cloud Kubernetes requires access to the Kubernetes API in order to be able to retrieve a list of addresses for pods running for a single service.

You can also use that description to run Minikube - just replace word 'minishift' with ' minikube.'Р’В In fact, it does not matter if you choose Kubernetes or Openshift - the next part of this tutorial will be applicable for both of them. The detailed instructions for Minishift may be found in my Quick guide to deploying Java apps on OpenShift. You should start it and expose the embedded Docker client provided by both of them. You need at least a single node cluster instance of Kubernetes ( Minikube) or Openshift ( Minishift) running on your local machine.We can realize that in the following steps: In order to be able to deploy and test our sample microservices, we need to prepare a development environment.

HOW TO USE DOCKER AND KUBERNETES CODE

The source code of sample applications presented in this article is available on GitHub in this repository. Because we use Spring Boot 2.0 we have to include the newest SNAPSHOT version of spring-cloud-kubernetes artifacts, which is 0.3.0.BUILD-SNAPSHOT. Spring Cloud Kubernetes is not released under Spring Cloud Release Trains, so we need to explicitly define its version. This version of spring-cloud-dependencies should be declared as a BOM for dependency management. Currently, the newest stable version of Spring Cloud is Finchley.RELEASE. These Spring Boot microservices use some built-in mechanisms provided by Kubernetes: config maps and secrets for distributed configuration, etcd for service discovery, and ingresses for the API gateway. There are three independent applications ( employee-service, department-service, organization-service), which communicate with each other through a REST API. It is quite similar to the architecture presented in the mentioned article about microservices on Spring Cloud. It illustrates the architecture of our sample system.

HOW TO USE DOCKER AND KUBERNETES HOW TO

I'll show you how to use an implementation of the discovery client, inter-service communication with the Ribbon client, and Zipkin discovery using Spring Cloud Kubernetes.Р”В«efore we proceed to the source code, let's take a look at the following diagram. It integrates Spring Cloud with Kubernetes. Although it is still in the incubation stage, it is definitely worth dedicating some time to it. The one really interesting project that helps us in development is Spring Cloud Kubernetes. But even if you decide to use Kubernetes components instead of Spring Cloud, you can take advantage of some interesting features provided throughout the whole Spring Cloud project. Such components like Eureka, Spring Cloud Config, or Zuul provided by Spring Cloud may be replaced by built-in Kubernetes objects like services, config maps, secrets, or ingresses. Spring Cloud and Kubernetes may be threatened as competitive solutions when you build a microservices environment. You may also enjoy Linode's Beginner's Guide to Kubernetes. Using Spring Cloud Kubernetes together with a Zuul proxy to expose a single Swagger API documentation for all microservices.Building application images using Docker and deploying them on Kubernetes using YAML configuration files.Injecting configuration settings into application pods using Kubernetes Config Maps and Secrets.Providing service discovery for all microservices using a Spring Cloud Kubernetes project.Using Spring Boot 2.0 in cloud-native development.I'm going to focus on showing you the differences and similarities in development between Spring Cloud and Kubernetes. The structure of the article will be quite similar to Quick Guide to Microservices with Spring Boot 2.0, Eureka and Spring Cloud, as they are describing the same aspects of application development.

HOW TO USE DOCKER AND KUBERNETES SERIES

Here's the next article in a series of 'Quick Guide to.' This time, we will discuss and run examples of Spring Boot microservices on Kubernetes.

How to use docker and kubernetes