deploy java microservices in kubernetes

deploying java microservices in kubernetes involves several steps, including creating the microservice, containerizing it, and then deploying it into a kubernetes cluster. in this tutorial, we'll cover the following steps:

1. create a simple java microservice using spring boot.
2. containerize the microservice using docker.
3. create kubernetes deployment and service manifests.
4. deploy the application to a kubernetes cluster.

step 1: create a simple java microservice

we'll start by creating a simple spring boot application. ensure you have java (jdk), maven, and spring boot installed on your system.

**1.1 create a spring boot application**

**1.3 create a controller**

**1.4 create main application class**

**1.5 build the application**

now build your application using maven:

step 2: containerize the microservice using docker

**2.1 create a dockerfile**

in the root of your project, create a `dockerfile`:

**2.2 build the docker image**

you need to have docker installed. build the docker image:

step 3: create kubernetes deployment and service manifests

**3.1 create a deployment yaml**

**3.2 create a service yaml**

step 4: deploy to kubernetes

assuming you have a kubernetes cluster set up and `kubectl` configured to access it, you can deploy your application.

**4.1 apply the deployment and service**

execute the following commands to deploy the microservice:

**4.2 verify the deployment**

check the status of your deployment:

step 5: access the microservice

if you are using a cloud provider with loadbalancer services, you can find the external ip by running:

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