HashiCorp Vault is a secret and encryption management system that allows your organization to secure sensitive information such as API keys, certificates, and passwords. In this article, I will show how a Java Spring Boot web application deployed into a Kubernetes cluster can fetch a secret directly from the Vault server using the Spring Cloud … Vault: Spring Boot web app using Spring Cloud Vault to fetch secrets
Github Actions provide the ability to define a build workflow directly in Github. The workflow steps are defined as yaml and can be triggered by various events, including a code push, branch, or tagging in the repository. In this article I will detail the steps of creating a simple Spring Boot web application that when … Github: automated Github release for Spring Boot jar using Github Actions
The GitHub “Release” page for a repository can provide your consumers a convenient way to download a binary version of your software as well as track the latest changes and enhancements. In this article, I will show how to invoke a local release process for a Java Spring Boot jar built with Gradle. A new … Github: locally invoked release process for a Gradle built Java Spring Boot project
If you need to enable JDWP debugging of your Spring Boot web application in an IDE such as Eclipse, you can append the ‘debug-jvm’ flag to the gradle task, and then from your IDE enable a remote debugging connection to port 5005. I will walk you through a full example, but very quickly, here is … Gradle: interactive JDWP debugging of bootRun gradle task in Eclipse IDE
The Spring Security framework provides a robust and customizable framework for authentication and authorization for Spring based applications. Using Spring Security, a Spring developer can add OIDC authentication and OAuth2 protection of resources by including the libraries in the build, configuring the Spring application.yml, and enabling various component configurations and annotations. In this article, I … Java: Spring Security OAuth2/OIDC protecting Client App and Resource Server
While working on your Spring Boot web application locally, gradle provides the ‘bootRun’ for a quick development lifecycle and ‘bootJar’ for packaging all the dependencies as a single jar deliverable. But for most applications these days, you will need this packaged into an OCI compatible (i.e. Docker) image for its ultimate deployment to an orchestrator … Java: build OCI compatible image for Spring Boot web app using jib
Spring Boot excels as a framework that makes it convenient to expose a set of REST based services. But once an application is developed, it is so trivial to create a new resource or modify a method signature that it becomes difficult to keep the documentation up-to-date so that clients can properly consume the REST … Java: Spring Boot REST service with OpenAPI/Swagger documentation
A Kubernetes liveness and readiness probe is how the kubelet determines health of a pod. This is often times as simple as checking the ability to reach the main service port over TCP or HTTP. But if you are using Spring Boot and have enabled the Actuator dependency, you have the ability to create even … Kubernetes: liveness probe for Spring Boot with custom Actuator health check
While working on your Spring Boot web application locally, gradle provides the ‘bootRun’ for a quick development lifecycle and ‘bootJar’ for packaging all the dependencies as a single jar deliverable. But for most applications these days, you will need this packaged into an OCI compatible (i.e. Docker) image for its ultimate deployment to an orchestrator … Java: Creating Docker image for Spring Boot web app using gradle
If you have enabled Actuator in your Spring Boot application, you can add custom status metrics to the standard health check at ‘/actuator/health’. Additionally, your custom health indicator can signal an UP/DOWN status that propagates to the main level status and can then be used by an external monitoring/alerting solutions or as an indicator to … Java: adding custom health indicator to Spring Boot Actuator
If you have enabled Actuator and the ‘micrometer-registry-prometheus’ dependency in your Spring Boot application, then you will have a new ‘/actuator/prometheus’ web endpoint that returns general information about threads, garbage collection, disk, and memory. This information is delivered in standard prometheus formatting as plaintext, with one metric per line. This is exactly the type of … Java: Adding custom metrics to Spring Boot Micrometer Prometheus endpoint
If you have enabled Actuator in your Spring Boot application, then in addition to the standard endpoints for health and metrics, you can also add your own endpoint to expose custom metrics. In its simplest form, this is done by adding a @Component and @Endpoint annotation to a custom class that returns the metrics, and … Java: exposing a custom Actuator endpoint with Spring Boot
In earlier versions of Docker, links were used to connect two containers by enabling network access as well as sharing environment variables. This approach is being deprecated in favor of a shared network between the services. And instead of environment propagation, environment values will need to be explicitly added to each service that requires them. … Docker: Using docker-compose and networking to link a Spring Boot app to an external service dependency
Docker Compose gives us the ability to define services, ports, volumes, and networks in a single file. This file provides a convenient and unified view into what would otherwise be a long list of docker commands. In this article, you will run the Spring Boot based spring-music app in a Docker container using docker-compose.
Spring Boot is an easy way to create production grade Spring based web applications. In this article, I want to illustrate how easily a Spring Boot application can be deployed to run as a Docker container. Specifically, we will build the spring-music project into a single executable jar that will then be copied into a … Docker: Running a Spring Boot based app in a Docker container
Although in modern architectures you typically see Spring Boot executable jars running as the primary process of a container, there are still many deployment scenarios where running the jar as a service at boot time is required. With Ubuntu 14.04, we can use SysV to run a Spring Boot application at boot time. This will … Java: Spring Boot application as a service using SysV on Ubuntu 14.04
Although in modern architectures you typically see Spring Boot executable jars running as the primary process of a container, there are still many deployment scenarios where running the jar as a service at boot time is required. With Ubuntu 16.04, we can use the built-in systemd supervisor to run a Spring Boot application at boot … Java: Spring Boot application as a service using systemd on Ubuntu 16.04
The two most common logging implementations used in conjunction with Spring/Spring Boot are Logback and Log4j2. In the recent past, a developer had a great deal of discretion on the format and files used for logging. But in the modern world of container deployment and scale, these logs typically feed enterprise logging solutions which requires … Java: Collapsing multiline stack traces into a single log event using Spring backed by Logback or Log4j2
Cloud Foundry is an opinionated Platform-as-a-Service that allows you to manage applications at scale. This article is part of a series that explores different facets of a Cloud Foundry deployment using the spring-music project as an example. This article is Part 4 of a series on Cloud Foundry concepts: Deploying the spring-music webapp, Part 1 Persisting spring-music data … CloudFoundry: Logging for the spring-music webapp, Part 4
Building services using Spring Boot gives a development team a jump start on many production concerns, including logging. But unlike a standard deployment where logging to a local file is where the developer’s responsibility typically ends, with Docker we must think about how to log to a public space outside our ephemeral container space. The … Docker: Sending Spring Boot logging to syslog
The Spring framework provides a proven and well documented model for the development of custom projects and services. The Spring Boot project takes an opinionated view of building production Spring applications, which favors convention over configuration. In this article we will explore how to configure a Spring Boot project to use the Simple Logging Facade … Spring: Spring Boot with SLF4J/Logback sending to syslog
As an exploration of AppDynamics’ APM functionality, you may find it useful to deploy a sample application that can quickly return back useful data. The Java Spring PetClinic connecting back to a PostgreSQL database provides a simple code base that exercises both database and application monitoring. In a previous article, I went over the detailed … AppDynamics: Java Spring PetClinic and PostgreSQL configured for monitoring
As an exploration of AppDynamics’ APM functionality, you may find it useful to deploy a sample application that can quickly return back useful data. The Java Spring PetClinic connecting back to a MySQL database provides a simple code base that exercises both database and application monitoring. We’ll deploy the Java Spring PetClinic unto Tomcat running … AppDynamics: Java Spring PetClinic and MySQL configured for monitoring