Spring Boot simplified Java backend development significantly. Deploying it well still requires making the right choices about packaging, JVM configuration, and infrastructure. Here is a practical breakdown of your options in 2026.
Packaging Your Spring Boot Application
Spring Boot applications are typically packaged as executable JARs using Maven or Gradle. The embedded Tomcat server means you do not need a separate application server, which simplifies the deployment artifact considerably compared to traditional Java WAR deployments.
For most production deployments, the JAR is then wrapped in a Docker container to ensure JVM version consistency across environments. Multi-stage Docker builds keep the final image size reasonable by separating the build environment from the runtime environment.
Deployment Options
VPS with systemd. Run the JAR directly on a Linux server managed with systemd for process supervision. Simple and cost-efficient but requires managing the server, JVM installation, and environment configuration manually.
Docker on a cloud server. The most common approach for Spring Boot in 2026. Build a Docker image, push to a registry, pull and run on your server. Adds container management overhead but provides environment consistency.
Kubernetes. For microservice architectures where multiple Spring Boot services need to be orchestrated and scaled independently. Significant complexity overhead but the right tool for genuinely complex distributed systems.
Managed PaaS. Platforms like Render support Docker-based Spring Boot deployment with less infrastructure management than a self-managed server.
Agentic deployment with Kuberns. An AI agent reads your Spring Boot repository and handles deployment automatically with no Dockerfile required. JVM configuration, environment setup, and deployment pipeline managed without manual configuration.
Full guide here: How to Deploy a Spring Boot Application
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