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Documentation

Understanding the Spring Framework version of the Petclinic application (Michael Isvy, Antoine Rey)
Spring for GraphQL in der Praxis: Eine GraphQL-API für die Tierklinik in deutsch (Nils Hartmann)
Spring for GraphQL in action: A GraphQL API for the veterinary clinic (Nils Hartmann)
How we built Spring PetClinic 100% in Java (Marcus Hellberg from Vaadin)

Community created resources

Blog post, tutorials, workshops, and other resources based on the Spring Pet Clinic project:

General articles

Quickstart to shows how to run the Spring PetClinic Application in Red Hat JBoss EAP (Ken Krebs, Juergen Hoeller, Rob Harrop, Costin Leau, Sam Brannen, Scott Andrews)
Migrating SpringBoot PetClinic REST to Quarkus (Jonathan Vila)

Cloud deployment

Containerizing a Legendary PetClinic App Built with Spring Boot (Docker)
Pet Clinic hosted by Azure Spring Apps (Microsoft Learn)
Migrating a Java Spring Framework Application to Windows Azure (Gregory Leake from Microsoft)
Run Spring Pet Clinic with Cloud SQL on Google App Engine Flexible Environment (Jisha Abubaker from Google)
Spring Pet Clinic using Cloud SQL (Google)
Spring into Kubernetes - Part 1 (Paul Czarkowski from IBM)
Spring into Kubernetes - Deploying with Helm (Paul Czarkowski from IBM)
Spring Cloud Microservices on Kubernetes the easy way with Platform9 (David Dieruf from Platform9)
Connecting a Spring Boot Application to YugabyteDB Managed and Deploying It on Google Kubernetes Engine (GKE) (Suda Srinivasan from Yugabyte DB)
Deploying A Java App In Kubernetes (Mitesh Soni)
Working with Microservices-1: Running a Java app that consists of 10 Microservices on a Development server (Cumhur Akkaya)
Spring Pet Clinic and the Developer Sandbox for Red Hat OpenShift (Redhat)
Deploy a Spring Boot Kotlin application with Docker (Scale Dynamics)

Application Performance Management (APM)

AppDynamics: Java Spring PetClinic and MySQL configured for monitoring (Fabian Lee)
Usage of inspectT in Spring PetClinic Microservices (Christian Vögele)
Monitor your Spring Boot application with OpenTelemetry and SigNoz (Ankit Anand from Signoz)
How to monitor Spring Boot apps with Elastic APM Java Agent (Microsoft)
Spring Boot Monitoring with Open-Source Tools (Leigh Finch from SigNoz)
Getting Started with OpenTelemetry: KinD, Jaeger and the Spring PetClinic Application (Shannon McFarland from Cisco)

Tuning

Evolution of Energy Usage in Spring Boot (Mirko Stocker)
Generate fake data for Spring PetClinic with Pandas and Faker (Markus Harrer)
Improving the performance of the Spring-Petclinic sample application (Julien Dubois from Ippon)
Tuning Spring Petclinic JPA and Hibernate configuration with Hypersistence Optimizer (Vlad Mihalcea)
Memory footprint of the JVM (Andy Wilkinson from Pivotal)
Memory wasted by Spring Boot PetClinic application (Ram Lakshmanan)

AI

AI Meets Spring Petclinic: Implementing an AI Assistant with Spring AI (Part I) (Oded Shopen from VMWare)
AI Meets Spring Petclinic: Implementing an AI Assistant with Spring AI (Part II) (Oded Shopen from VMWare)

Tooling

Java ecosystem

GraalVM 21.3.0 used spring-petclinic-data-jdbc to bench image size and image build time (GraalVM release note)
Project Leyden: Premain - Case study: Spring Boot PetClinic (Vladimir Ivanov from Oracle )

Other technical stacks

Désendettement de Spring Cloud Netflix - french (Antoine Rey)
Migrating from SQL to NoSQL with Spring PetClinic and Apache Cassandra (David Jones-Gilardi, Cedrick Lunven, Artem Chebotko from DataStax)
Running a Spring Boot 3.x application WAR file on Liberty (Chuck Bridgham from Open Liberty)