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Expense & Income Tracker

A self-hosted, lightweight personal finance dashboard designed to bridge the gap between "too simple to be useful" (spreadsheets) and "too complex to bother with" (enterprise accounting software). It provides a fast, single-page application (SPA) to log transactions, monitor cash flow at a glance, and analyze spending patterns with minimal friction.

🚀 Problem Statement

Most people lose track of where their money goes. Conventional options present clear pain points:

Spreadsheets: Too manual, prone to breaking formulas, and lack an optimized mobile/desktop entry flow.
Accounting Software: Overkill for personal finance, demanding a steep learning curve and double-entry bookkeeping.
Commercial Apps: Sell your data, lock functionality behind subscriptions, or force cloud-based storage on external servers.

This project addresses these exact challenges through three pillars:

Visibility: A running list of income vs. expenses makes cash flow tangible. You can't fix what you can't see.
Low Friction: If logging a transaction takes more than 10 seconds, people stop doing it. The entire user experience is built around rapid entry.
Data Access & Privacy: Fully self-hosted. Your sensitive financial data stays on your machine, not in a corporate cloud.

🏗️ Design Decisions & Trade-offs

The architecture follows a strict keep it simple and self-contained philosophy. Below is the rationale behind the structural choices and the trade-offs accepted.

1. Java + Spring Boot (Backend)

Why: The ecosystem around Spring Security and Spring Data JPA is battle-tested for authentication and structured data persistence. For a CRUD application requiring role-based access control (RBAC), Spring Boot delivers high security with fewer "footguns" than wiring custom JWT middleware by hand in Express or Go.
Trade-off: It has a heavier memory footprint and slower startup time than a Python FastAPI script or Go binary. However, it provides compile-time type safety and a predictable project architecture that scales neatly without falling apart.

2. Vanilla JavaScript (Frontend)

Why: The frontend is a single-page dashboard, not a complex social network. Avoiding a build step, npm, and an oversized framework (like React or Vue) for a handful of forms and tables prevents overengineering and keeps deployment dead simple.
Trade-off: Manual DOM manipulation will become messy and harder to maintain if feature density scales past the current scope.

3. JWT Auth via HS256 (Stateless)

Why: Stateless authentication removes the need for a server-side session store. HS256 (symmetric signing) is trivial to configure compared to RS256 (asymmetric key pairs) and remains thoroughly secure because the backend application is the sole token issuer and verifier.
Trade-off: Token revocation is inherently difficult. You cannot instantly invalidate a JWT without maintaining an active token deny-list. For a self-hosted or small-team personal finance app where administrative lockouts are rare, this is a reasonable compromise.

4. Dual Database Profiles: H2 & PostgreSQL

Why: Running the command ./mvnw spring-boot:run should work out of the box with zero external configuration—which H2 database profiles provide perfectly for development. In production, a PostgreSQL profile swaps in to ensure multi-user concurrency and absolute data durability.
Trade-off: Supporting two database engines introduces minor syntax and dialect divergence risks. The application schema is kept clean and ANSI SQL-compliant to circumvent this.

5. First-User-Becomes-Admin Pattern

Why: Zero-configuration setup. The very first user to register on a clean deployment automatically receives the Administrative role. No SQL initialization scripts to run, no default credentials (admin/admin) to leak or forget to change.
Trade-off: If you lose your credentials and you are the lone administrator, there is no automated password reset path. Recovery requires direct database intervention via SQL.

6. Single Monolithic Container

Why: The application governs a single unified domain (transactions and authentication). Splitting this footprint into an auth-service and a transaction-service adds network latency, infrastructure complexity, and distributed transaction headaches for zero tangible benefit.
Trade-off: Auth logic and transaction workflows cannot scale independently. At the current operational scale, this remains a purely theoretical problem.

⚖️ Known Limitations

Before deploying, be aware of the following scope limitations currently present in the codebase:

Authentication Rigidness: * No built-in password reset flow. Requires manual database entry to override passwords.
- JWTs cannot be explicitly revoked upon logout. Tokens remain valid for their full lifetime until expiration.
Feature Scope:
- No Data Export: Data is bound to the database. There is no native export mechanism to CSV, PDF, or OFX.
- No Recurring Transactions: Scheduled/recurring entries (e.g., monthly rent, recurring subscriptions) must be logged manually every month.
- Single Currency Only: No exchange rate calculations or multi-currency wallets; financial values are formatted uniformly under a single system currency.
Operational Readiness:
- No Automated Backups: The provided Docker Compose layout does not include scheduled cron backups. If the storage volume fails, data loss occurs. Production instances should wrap pg_dump on a cron schedule to an external destination (e.g., AWS S3).
- Client-Side Rendering (CSR): The SPA fetches everything dynamically after the initial script loads. (Though SEO is irrelevant for an internal dashboard, initial load optimizations could be improved later via Server-Side Rendering).
- Minimal Test Coverage: While unit testing structures exist, code coverage is minimal. Production hardening requires integration suites covering concurrent writes and database rollbacks.

📈 What I'd Do Differently at Scale

If this application were re-architected to support millions of concurrent global users, the following structural changes would be prioritized:

[Client / UI (Vite + React + CDN)]
               │
               ▼
   [API Gateway / Keycloak (OIDC Auth)]
               │
               ▼
[Event Bus / Message Queue (Kafka/NATS)] ──► [Async Write Worker] ──► [PostgreSQL Primary (Writes)]
               │                                                                   │
               ▼                                                                   ▼
[Read Optimization Service / CQRS] ◄───────────────────────────────── [Read Replicas (Dashboard Queries)]

1. Decouple Identity & Access Management (IAM)

Rolling custom JWT logic becomes a security liability at scale. The authentication layer would be migrated to OAuth2/OIDC standards using an identity provider like Keycloak, Authentik, or a managed service to offload multi-factor authentication (MFA), audit logging, and secure password recovery.

2. Event-Driven Architecture & Async Writes

To eliminate database contention under heavy user write stress, an event bus (such as Apache Kafka, NATS, or RabbitMQ) would be placed before the persistence layer. Write mutations would process asynchronously, allowing the API to respond immediately while ensuring eventual consistency.

3. Read Replicas & CQRS

Dashboard analytics queries are heavily read-intensive. Implementing Command Query Responsibility Segregation (CQRS) would split the database pipeline: a PostgreSQL primary node optimized exclusively for writes, and multiple read-replicas handling real-time dashboard calculations, denormalized views, and materialized aggregations.

4. Separate & Modernize the Frontend

Vanilla JS fails to maintain legibility when features expand past a certain threshold. The frontend would be rebuilt inside a framework ecosystem like Vite + React/Svelte, leveraging modular component design, centralized state management, and asset deployment over global Content Delivery Networks (CDNs).

5. Multi-Stage CI/CD Deployment Pipeline

The deployment pipeline would move away from basic standalone container execution and adopt enterprise deployment patterns:

Blue/Green or Canary Deployments to minimize service interruption.
Automated Database Migrations (via Liquibase or Flyway) featuring declarative rollback logic.
Feature Flagging to toggle high-impact visual components safely without coupling releases to deployments.

6. Observability Stack Integration

Standard output logging (stdout) and browser console tracking would be swapped for a modern telemetry pipeline: structured logging utilizing JSON formats, metrics collection via Prometheus, distributed tracing via OpenTelemetry, and immediate incident alerting through platforms like PagerDuty or OpsGenie.

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# Awesome Keycloak [![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/sindresorhus/awesome) # [<img src="https://www.keycloak.org/resources/images/keycloak_logo_480x108.png">](https://github.com/thomasdarimont/awesome-keycloak) > Carefully curated list of awesome Keycloak resources. A curated list of resources for learning about the Open Source Identity and Access Management solution Keycloak. Contains books, websites, blog posts, links to github Repositories. # Contributing Contributions welcome. Add links through pull requests or create an issue to start a discussion. [Please refer to the contributing guide for details](CONTRIBUTING.md). # Contents * [General](#general) * [Documentation](#docs) * [Keycloak Website](http://www.keycloak.org) * [Current Documentation](http://www.keycloak.org/documentation.html) * [Archived Documentation](http://www.keycloak.org/documentation-archive.html) * [Mailing Lists](#mailing-lists) * [User Mailing List](#user-mailing-list) * [Developer Mailing List](#dev-mailing-list) * [Mailing List Search](#mailing-list-search) * [Books](#books) * [Articles](#articles) * [Talks](#talks) * [Presentations](#presentations) * [Video Playlists](#video-playlists) * [Community Extensions](#community-extensions) * [Integrations](#integrations) * [Themes](#themes) * [Docker](#docker) * [Deployment Examples](#deployment-examples) * [Example Projects](#example-projects) * [Benchmarks](#benchmarks) * [Help](#help) * [Commercial Offerings](#commercial-offerings) * [Miscellaneous](#miscellaneous) # General ## Documentation * [Keycloak Website](http://www.keycloak.org/) * [Current Documentation](http://www.keycloak.org/documentation.html) * [Archived Documentation](http://www.keycloak.org/documentation-archive.html) * [Product Documentation for Red Hat Single Sign-On](https://access.redhat.com/documentation/en/red-hat-single-sign-on/) ## Discussion Groups and Mailing Lists * [Keycloak Users Google Group](https://groups.google.com/forum/#!forum/keycloak-user) * [Keycloak Developers Google Group](https://groups.google.com/forum/#!forum/keycloak-dev) * [Keycloak Discourse Group](https://keycloak.discourse.group/) * [Keycloak Developer Chat](https://keycloak.zulipchat.com) * [Inactive - User Mailing List](https://lists.jboss.org/mailman/listinfo/keycloak-user) * [Inactive - Developer Mailing List](https://lists.jboss.org/mailman/listinfo/keycloak-dev) * [Mailing List Search](http://www.keycloak.org/search) * [Keycloak Subreddit](https://www.reddit.com/r/keycloak) ## Books * [Keycloak - Identity and Access Management for Modern Applications](https://www.packtpub.com/product/keycloak-identity-and-access-management-for-modern-applications/9781800562493) ## Articles * [How to get Keycloak working with Docker](https://www.ivonet.nl/2015/05/23/Keycloak-Docker/) * [Single-Sign-On for Microservices and/or Java EE applications with Keycloak SSO](http://www.n-k.de/2016/06/keycloak-sso-for-microservices.html) * [Keycloak Admin Client(s) - multiple ways to manage your SSO system](http://www.n-k.de/2016/08/keycloak-admin-client.html) * [How to get the AccessToken of Keycloak in Spring Boot and/or Java EE](http://www.n-k.de/2016/05/how-to-get-accesstoken-from-keycloak-springboot-javaee.html) * [JWT authentication with Vert.x, Keycloak and Angular 2](http://paulbakker.io/java/jwt-keycloak-angular2/) * [Authenticating via Kerberos with Keycloak and Windows 2008 Active Directory](http://matthewcasperson.blogspot.de/2015/07/authenticating-via-kerberos-with.html) * [Deploying Keycloak with Ansible](https://adam.younglogic.com/2016/01/deploying-keycloak-via-ansible/) * [Easily secure your Spring Boot applications with Keycloak](https://developers.redhat.com/blog/2017/05/25/easily-secure-your-spring-boot-applications-with-keycloak/) * [How Red Hat re-designed its Single Sign On (SSO) architecture, and why](https://developers.redhat.com/blog/2016/10/04/how-red-hat-re-designed-its-single-sign-on-sso-architecture-and-why/) * [OAuth2, JWT, Open-ID Connect and other confusing things](http://giallone.blogspot.de/2017/06/oath2.html) * [X509 Authentication with Keycloak and JBoss Fuse](https://sjhiggs.github.io/fuse/sso/x509/smartcard/2017/03/29/fuse-hawtio-keycloak.html) * [Running Keycloak on OpenShift 3](https://medium.com/@sbose78/running-keycloak-on-openshift-3-8d195c0daaf6) * [Introducing Keycloak for Identity and Access Management](https://www.thomasvitale.com/introducing-keycloak-identity-access-management/) * [Keycloak Basic Configuration for Authentication and Authorisation](https://www.thomasvitale.com/keycloak-configuration-authentication-authorisation/) * [Keycloak on OpenShift Origin](https://medium.com/@james_devcomb/keycloak-on-openshift-origin-ee81d01dac97) * [Identity Management, One-Time-Passwords and Two-Factor-Auth with Spring Boot and Keycloak](http://www.hascode.com/2017/11/identity-management-one-time-passwords-and-two-factor-auth-with-spring-boot-and-keycloak/) * [Keycloak Identity Brokering with Openshift](https://developers.redhat.com/blog/2017/12/06/keycloak-identity-brokering-openshift/) * [OpenID Connect Identity Brokering with Red Hat Single Sign-On](https://developers.redhat.com/blog/2017/10/18/openid-connect-identity-brokering-red-hat-single-sign/) * [Authentication & user management is hard](https://eclipsesource.com/blogs/2018/01/11/authenticating-reverse-proxy-with-keycloak/) * [Securing Nginx with Keycloak](https://edhull.co.uk/blog/2018-06-06/keycloak-nginx) * [Secure kibana dashboards using keycloak](https://aboullaite.me/secure-kibana-keycloak/) * [Configuring NGINX for OAuth/OpenID Connect SSO with Keycloak/Red Hat SSO](https://developers.redhat.com/blog/2018/10/08/configuring-nginx-keycloak-oauth-oidc/) * [Keycloak Clustering Setup and Configuration Examples](https://github.com/fit2anything/keycloak-cluster-setup-and-configuration) * [MicroProfile JWT with Keycloak](https://kodnito.com/posts/microprofile-jwt-with-keycloak/) * [Keycloak Essentials](https://medium.com/keycloak/keycloak-essentials-86254b2f1872) * [SSO-session failover with Keycloak and AWS S3](https://medium.com/@georgijsr/sso-session-failover-with-keycloak-and-aws-s3-e0b1db985e12) * [KTOR and Keycloak: authentication with OpenId](https://medium.com/slickteam/ktor-and-keycloak-authentication-with-openid-ecd415d7a62e) * [Keycloak: Core concepts of open source identity and access management](https://developers.redhat.com/blog/2019/12/11/keycloak-core-concepts-of-open-source-identity-and-access-management) * [Who am I? Keycloak Impersonation API](https://blog.softwaremill.com/who-am-i-keycloak-impersonation-api-bfe7acaf051a) * [Setup Keycloak Server on Ubuntu 18.04](https://medium.com/@hasnat.saeed/setup-keycloak-server-on-ubuntu-18-04-ed8c7c79a2d9) * [Getting started with Keycloak](https://robferguson.org/blog/2019/12/24/getting-started-with-keycloak/) * [Angular, OpenID Connect and Keycloak](https://robferguson.org/blog/2019/12/29/angular-openid-connect-keycloak/) * [Angular, OAuth 2.0 Scopes and Keycloak](https://robferguson.org/blog/2019/12/31/angular-oauth2-keycloak/) * [Keycloak, Flowable and OpenLDAP](https://robferguson.org/blog/2020/01/03/keycloak-flowable-and-openldap/) * [How to exchange token from an external provider to a keycloak token](https://www.mathieupassenaud.fr/token-exchange-keycloak/) * [Building an Event Listener SPI (Plugin) for Keycloak](https://dev.to/adwaitthattey/building-an-event-listener-spi-plugin-for-keycloak-2044) * [Keycloak user migration – connect your legacy authentication system to Keycloak](https://codesoapbox.dev/keycloak-user-migration/) * [Keycloak Authentication and Authorization in GraphQL](https://medium.com/@darahayes/keycloak-authentication-and-authorization-in-graphql-ad0a1685f7da) * [Kong / Konga / Keycloak: securing API through OIDC](https://github.com/d4rkstar/kong-konga-keycloak) * [KeyCloak: Custom Login theme](https://codehumsafar.wordpress.com/2018/09/11/keycloak-custom-login-theme/) * [Keycloak: Use background color instead of background image in Custom Login theme](https://codehumsafar.wordpress.com/2018/09/21/keycloak-use-background-color-instead-of-background-image-in-custom-login-theme/) * [How to turn off the Keycloak theme cache](https://keycloakthemes.com/blog/how-to-turn-off-the-keycloak-theme-cache) * [How to add a custom field to the Keycloak registration page](https://keycloakthemes.com/blog/how-to-add-custom-field-keycloak-registration-page) * [How to setup Sign in with Google using Keycloak](https://keycloakthemes.com/blog/how-to-setup-sign-in-with-google-using-keycloak) * [How to sign in users on Keycloak using Github](https://keycloakthemes.com/blog/how-to-sign-in-users-on-keycloak-using-github) * [Extending Keycloak SSO Capabilities with IBM Security Verify](https://community.ibm.com/community/user/security/blogs/jason-choi1/2020/06/10/extending-keycloak-sso-capabilities-with-ibm-secur) * [AWS SAML based User Federation using Keycloak](https://medium.com/@karanbir.tech/aws-connect-saml-based-identity-provider-using-keycloak-9b3e6d0111e6) * [AWS user account OpenID federation using Keycloak](https://medium.com/@karanbir.tech/aws-account-openid-federation-using-keycloak-40d22b952a43) * [How to Run Keycloak in HA on Kubernetes](https://blog.sighup.io/keycloak-ha-on-kubernetes/) * [How to create a Keycloak authenticator as a microservice?](https://medium.com/application-security/how-to-create-a-keycloak-authenticator-as-a-microservice-ad332e287b58) * [keycloak.ch | Installing & Running Keycloak](https://keycloak.ch/keycloak-tutorials/tutorial-1-installing-and-running-keycloak/) * [keycloak.ch | Configuring Token Exchange using the CLI](https://keycloak.ch/keycloak-tutorials/tutorial-token-exchange/) * [keycloak.ch | Configuring WebAuthn](https://keycloak.ch/keycloak-tutorials/tutorial-webauthn/) * [keycloak.ch | Configuring a SwissID integration](https://keycloak.ch/keycloak-tutorials/tutorial-swissid/) * [Getting Started with Service Accounts in Keycloak](https://medium.com/@mihirrajdixit/getting-started-with-service-accounts-in-keycloak-c8f6798a0675) * [Building cloud native apps: Identity and Access Management](https://dev.to/lukaszbudnik/building-cloud-native-apps-identity-and-access-management-1e5m) * [X.509 user certificate authentication with Red Hat’s single sign-on technology](https://developers.redhat.com/blog/2021/02/19/x-509-user-certificate-authentication-with-red-hats-single-sign-on-technology) * [Grafana OAuth with Keycloak and how to validate a JWT token](https://janikvonrotz.ch/2020/08/27/grafana-oauth-with-keycloak-and-how-to-validate-a-jwt-token/) * [How to setup a Keycloak server with external MySQL database on AWS ECS Fargate in clustered mode](https://jbjerksetmyr.medium.com/how-to-setup-a-keycloak-server-with-external-mysql-database-on-aws-ecs-fargate-in-clustered-mode-9775d01cd317) * [Extending Keycloak: adding API key authentication](http://www.zakariaamine.com/2019-06-14/extending-keycloak) * [Extending Keycloak: using a custom email sender](http://www.zakariaamine.com/2019-07-14/extending-keycloak2) * [Integrating Keycloak and OPA with Confluent](https://goraft.tech/2021/03/17/integrating-keycloak-and-opa-with-confluent.html) * [UMA 2.0 : User Managed Access - how to use it with bash](https://blog.please-open.it/uma/) ## Talks * [JDD2015 - Keycloak Open Source Identity and Access Management Solution](https://www.youtube.com/watch?v=TuEkj25lbd0) * [2015 Using Tomcat and Keycloak in an iFrame](https://www.youtube.com/watch?v=nF_lw7uIxao) * [2016 You've Got Microservices Now Secure Them](https://www.youtube.com/watch?v=SfVhqf-rMQY) * [2016 Keycloak: Open Source Single Sign On - Sebastian Rose - AOE conf (german)](https://www.youtube.com/watch?v=wbKw0Bwyne4) * [2016 Sécuriser ses applications back et front facilement avec Keycloak (french)](https://www.youtube.com/watch?v=bVidgluUcg0) * [2016 Keycloak and Red Hat Mobile Application Platform](https://www.youtube.com/watch?v=4NBgiHM5aOA) * [2016 Easily secure your Front and back applications with KeyCloak](https://www.youtube.com/watch?v=RGp4HUKikts) * [2017 Easily secure your Spring Boot applications with Keycloak - Part 1](https://developers.redhat.com/video/youtube/vpgRTPFDHAw/) * [2017 Easily secure your Spring Boot applications with Keycloak - Part 2](https://developers.redhat.com/video/youtube/O5ePCWON08Y/) * [2018 How to secure your Spring Apps with Keycloak by Thomas Darimont @ Spring I/O 2018](https://www.youtube.com/watch?v=haHFoeWUj0w) * [2018 DevNation Live | A Deep Dive into Keycloak](https://www.youtube.com/watch?v=ZxpY_zZ52kU) * [2018 IDM Europe: WSO2 Identity Server vs. Keycloak (Dmitry Kann)](https://www.youtube.com/watch?v=hnjBiGsEDoU) * [2018 JPrime|Building an effective identity and access management architecture with Keycloak (Sebastien Blanc)](https://www.youtube.com/watch?v=bMqcGkCvUVQ) * [2018 WJAX| Sichere Spring-Anwendungen mit Keycloak](https://www.youtube.com/watch?v=6Z490EMcafs) * [2019 Spring I/O | Secure your Spring Apps with Keycloak](https://www.youtube.com/watch?v=KrOd5wIkqls) * [2019 DevoxxFR | Maitriser sa gestion de l'identité avec Keycloak (L. Benoit, T. Recloux, S. Blanc)](https://www.youtube.com/watch?v=0cziL__0-K8) * [2019 DevConf | Fine - Grained Authorization with Keycloak SSO (Marek Posolda)](https://www.youtube.com/watch?v=yosg4St0iUw) * [2019 VoxxedDays Minsk | Bilding an effective identity and access management architecture with Keycloak (Sebastien Blanc)](https://www.youtube.com/watch?v=RupQWmYhrLA) * [2019 Single-Sign-On Authentifizierung mit dem Keycloak Identity Provider | jambit CoffeeTalk](https://www.youtube.com/watch?v=dnY6ORaFNY8) * [2020 Keycloak Team | Keycloak Pitch](https://www.youtube.com/watch?v=GZTN_VXjoQw) * [2020 Keycloak Team | Keycloak Overview](https://www.youtube.com/watch?v=duawSV69LDI) * [2020 Please-open.it : oauth2 dans le monde des ops (french)](https://www.youtube.com/watch?v=S-9X50QajmY) ## Presentations * [Keycloak 101](https://stevenolen.github.io/kc101-talk/#1) ## Video Playlists * [Keycloak Identity and Access Management by Łukasz Budnik](https://www.youtube.com/playlist?list=PLPZal7ksxNs0mgScrJxrggEayV-TPZ9sA) * [Keycloak by Niko Köbler](https://www.youtube.com/playlist?list=PLNn3plN7ZiaowUvKzKiJjYfWpp86u98iY) * [Keycloak Playlist by hexaDefence](https://youtu.be/35bflT_zxXA) * [Keycloak Tutorial Series by CodeLens](https://www.youtube.com/watch?v=Lr9WeIMtFow&list=PLeGNmkzI56BTjRxNGxUhh4k30FD_gy0pC) ## Clients * [Official Keycloak Node.js Admin Client](https://github.com/keycloak/keycloak-admin-client/) ("Extremely Experimental") * [Keycloak Node.js TypeScript Admin Client by Canner](https://github.com/Canner/keycloak-admin/) * [Keycloak Go Client by Cloudtrust](https://github.com/cloudtrust/keycloak-client) * [Keycloak Nest.js Admin Client by Relevant Fruit](https://github.com/relevantfruit/nestjs-keycloak-admin) ## Community Extensions * [Keycloak Extensions List](https://www.keycloak.org/extensions.html) * [Keycloak Benchmark Project](https://github.com/keycloak/keycloak-benchmark) * [Keycloak: Link IdP Login with User Provider](https://github.com/ohioit/keycloak-link-idp-with-user) * [Client Owner Manager: Control who can edit a client](https://github.com/cyclone-project/cyclone-client-registration) * [Keyloak Proxy written in Go](https://github.com/gambol99/keycloak-proxy) * [Script based ProtocolMapper extension for SAML](https://github.com/cloudtrust/keycloak-client-mappers) * [Realm export REST resource by Cloudtrust](https://github.com/cloudtrust/keycloak-export) * [Keycloak JDBC Ping Setup by moremagic](https://github.com/moremagic/keycloak-jdbc-ping) * [SMS 2 Factor Authentication for Keycloak via AWS SNS](https://github.com/nickpack/keycloak-sms-authenticator-sns) * [SMS 2 Factor Authentiation for Keycloak via SMS by Alliander](https://github.com/Alliander/keycloak-sms-authenticator) * [Identity Provider for vk.com](https://github.com/mrk08/keycloak-vk) * [CAS Protocol Support](https://github.com/Doccrazy/keycloak-protocol-cas) * [WS-FED Support](https://github.com/cloudtrust/keycloak-wsfed) * [Keycloak Discord Support](https://github.com/wadahiro/keycloak-discord) * [Keycloak Login with User Attribute](https://github.com/cnieg/keycloak-login-attribute) * [zonaut/keycloak-extensions](https://github.com/zonaut/keycloak-extensions) * [leroyguillaume/keycloak-bcrypt](https://github.com/leroyguillaume/keycloak-bcrypt) * [SPI Authenticator in Nodejs](https://www.npmjs.com/package/keycloak-rest-authenticator) * [Have I Been Pwned? Keycloak Password Policy](https://github.com/alexashley/keycloak-password-policy-have-i-been-pwned) * [Keycloak Eventlistener for Google Cloud Pub Sub](https://github.com/acesso-io/keycloak-event-listener-gcpubsub) * [Enforcing Password policy based on attributes of User Groups](https://github.com/sayedcsekuet/keycloak-user-group-based-password-policy) * [Verify Email with Link or Code by hokumski](https://github.com/hokumski/keycloak-verifyemailwithcode) * [Role-based Docker registry authentication](https://github.com/lifs-tools/keycloak-docker-role-mapper) * [SCIM for keycloak](https://github.com/Captain-P-Goldfish/scim-for-keycloak) * [Keycloak Kafka Module](https://github.com/SnuK87/keycloak-kafka) ## Integrations * [Official Keycloak Node.js Connect Adapter](https://github.com/keycloak/keycloak-nodejs-connect) * [Keycloak support for Aurelia](https://github.com/waynepennington/aurelia-keycloak) * [Keycloak OAuth2 Auth for PHP](https://github.com/stevenmaguire/oauth2-keycloak) * [Jenkins Keycloak Authentication Plugin](https://github.com/jenkinsci/keycloak-plugin) * [Meteor Keycloak Accounts](https://github.com/mxab/meteor-keycloak) * [HapiJS Keycloak Auth](https://github.com/felixheck/hapi-auth-keycloak) * [zmartzone mod_auth_openidc for Apache 2.x](https://github.com/zmartzone/mod_auth_openidc) * [Duo Security MFA Authentication for Keycloak](https://github.com/mulesoft-labs/keycloak-duo-spi) * [Extension Keycloak facilitant l'utilisation de FranceConnect](https://github.com/InseeFr/Keycloak-FranceConnect) * [Ambassador Keycloak Support](https://www.getambassador.io/reference/idp-support/keycloak/) * [Keycloak Python Client](https://github.com/akhilputhiry/keycloak-client) * [Keycloak Terraform Provider](https://github.com/mrparkers/terraform-provider-keycloak) * [Keycloak ADFS OpenID Connect](https://www.michaelboeynaems.com/keycloak-ADFS-OIDC.html) * [React/NextJS Keycloak Bindings](https://github.com/panz3r/react-keycloak) * [Keycloak Open-Shift integration](https://github.com/keycloak/openshift-integration) * [Keycloak, Kong and Konga setup scripts (local development)](https://github.com/JaouherK/Kong-konga-Keycloak) * [SSO for Keycloak and Nextcloud with SAML](https://stackoverflow.com/questions/48400812/sso-with-saml-keycloak-and-nextcloud) * [Keycloak Connect GraphQL Adapter for Node.js](https://github.com/aerogear/keycloak-connect-graphql) * [python-keycloak](https://github.com/marcospereirampj/python-keycloak) * [Keycloak and PrivacyId3a docker-compose (local development)](https://github.com/JaouherK/keycloak-privacyIdea) * [Nerzal/gocloak Golang Keycloak API Package](https://github.com/Nerzal/gocloak) * [Apple Social Identity Provider for Keycloak](https://github.com/BenjaminFavre/keycloak-apple-social-identity-provider) ## Quick demo Videos * [Keycloak with istio envoy jwt-auth proxy](https://www.youtube.com/watch?v=wscX7JMfuBI) ## Themes * [Community Keycloak Ionic Theme](https://github.com/lfryc/keycloak-ionic-theme) * [A Keycloak theme based on the AdminLTE UI library](https://github.com/MAXIMUS-DeltaWare/adminlte-keycloak-theme) * [GOV.UK Theme](https://github.com/UKHomeOffice/keycloak-theme-govuk) * [Carbon Design](https://github.com/httpsOmkar/carbon-keycloak-theme) * [Modern](https://keycloakthemes.com/themes/modern) * [Adminlte](https://git.uptic.nl/uptic-public-projects/uptic-keyclock-theme-adminlte) * [keycloakify: Create Keycloak themes using React](https://github.com/InseeFrLab/keycloakify) ## Docker * [Official Keycloak Docker Images](https://github.com/jboss-dockerfiles/keycloak) * [Keycloak Examples as Docker Image](https://hub.docker.com/r/jboss/keycloak-examples) * [Keycloak Maven SDK for managing the entire lifecycle of your extensions with Docker](https://github.com/OpenPj/keycloak-docker-quickstart) ## Kubernetes * [Deprecated Keycloak Helm Chart](https://github.com/codecentric/helm-charts/tree/master/charts/keycloak) * [codecentric Keycloak Helm Chart](https://github.com/codecentric/helm-charts/tree/master/charts/keycloak) * [Import / Export Keycloak Config](https://gist.github.com/unguiculus/19618ef57b1863145262191944565c9d) * [keycloak-operator](https://github.com/keycloak/keycloak-operator) ## Tools * [keycloakmigration: Manage your Keycloak configuration with code](https://github.com/klg71/keycloakmigration) * [tool to autogenerate an OpenAPI Specification for Keycloak's Admin API](https://github.com/ccouzens/keycloak-openapi) * [oidc-bash-client](https://github.com/please-openit/oidc-bash-client) * [louketo-proxy (FKA Gatekeeper)](https://github.com/louketo/louketo-proxy) * [keycloak-config-cli: Configuration as Code for Keycloak](https://github.com/adorsys/keycloak-config-cli) * [Keycloak Pulumi](https://github.com/pulumi/pulumi-keycloak) * [Keycloak on AWS](https://github.com/aws-samples/keycloak-on-aws) * [aws-cdk construct library that allows you to create KeyCloak on AWS in TypeScript or Python](https://github.com/aws-samples/cdk-keycloak) * [keycloak-scanner Python CLI](https://github.com/NeuronAddict/keycloak-scanner) ## Deployment Examples * [Keycloak deployment with CDK on AWS with Fargate](https://github.com/aws-samples/cdk-keycloak) ## Example Projects * [Examples from Keycloak Book: Keycloak - Identity and Access Management for Modern Applications](https://github.com/PacktPublishing/Keycloak-Identity-and-Access-Management-for-Modern-Applications) * [Official Examples](https://github.com/keycloak/keycloak/tree/master/examples) * [Keycloak Quickstarts](https://github.com/keycloak/keycloak-quickstarts) * [Drupal 7.0 with Keycloak](https://gist.github.com/thomasdarimont/17fa146c4fb5440d7fc2ee6322ec392d) * [Securing Realm Resources With Custom Roles](https://github.com/dteleguin/custom-admin-roles) * [BeerCloak: a comprehensive KeyCloak extension example](https://github.com/dteleguin/beercloak) * [KeyCloak Extensions: Securing Realm Resources With Custom Roles](https://github.com/dteleguin/custom-admin-roles) * [Red Hat Single Sign-On Labs](https://github.com/RedHatWorkshops/red-hat-sso) * [Spring Boot Keycloak Tutorial](https://github.com/sebastienblanc/spring-boot-keycloak-tutorial) * [Custom Keycloak Docker Image of Computer Science House of RIT](https://github.com/ComputerScienceHouse/keycloak-docker) * [Example of custom password hash SPI for Keycloak](https://github.com/pavelbogomolenko/keycloak-custom-password-hash) * [Example for a custom http-client-provider with Proxy support](https://github.com/xiaoyvr/custom-http-client-provider) * [Monitor your keycloak with prometheus](https://github.com/larscheid-schmitzhermes/keycloak-monitoring-prometheus) * [Custom User Storage Provider .ear with jboss-cli setup](https://github.com/thomasdarimont/keycloak-user-storage-provider-demo) * [Keycloak - Experimental extensions by Stian Thorgersen/Keycloak](https://github.com/stianst/keycloak-experimental) * [Securing Spring Boot Admin & Actuator Endpoints with Keycloak](https://github.com/thomasdarimont/spring-boot-admin-keycloak-example) * [A Keycloak Mobile Implementation using Angular v4 and Ionic v3](https://github.com/tomjackman/keyonic-v2) * [Example for Securing Apps with Keycloak on Kubernetes](https://github.com/stianst/demo-kubernetes) * [Example for Securing AspDotNet Core Apps with Keycloak](https://github.com/thomasdarimont/kc-dnc-demo) * [Example for passing custom URL parameters to a Keycloak theme for dynamic branding](https://github.com/dteleguin/keycloak-dynamic-branding) * [Angular Webapp secured with Keycloak](https://github.com/CodepediaOrg/bookmarks.dev) * [Keycloak Theme Development Kit](https://github.com/anthonny/kit-keycloak-theme) * [Keycloak Clustering examples](https://github.com/ivangfr/keycloak-clustered) * [Keycloak Last Login Date Event Listener](https://github.com/ThoreKr/keycloak-last-login-event-listener) * [Keycloak Project Example (Customizations, Extensions, Configuration)](https://github.com/thomasdarimont/keycloak-project-example) * [Example of adding API Key authentication to Keycloak](https://github.com/zak905/keycloak-api-key-demo) ## Benchmarks * [Gatling based Benchmark by @rvansa](https://github.com/rvansa/keycloak-benchmark) ## Help * [Keycloak on Stackoverflow](https://stackoverflow.com/questions/tagged/keycloak) ## Commercial Offerings * [Red Hat Single Sign-On](https://access.redhat.com/products/red-hat-single-sign-on) * [INTEGSOFT UNIFIED USER CREDENTIALS WITH KEYCLOAK SSO](https://www.integsoft.cz/en/sso.html#what-is-sso) * [JIRA SSO Plugin by codecentric](https://marketplace.atlassian.com/plugins/de.codecentric.atlassian.oidc.jira-oidc-plugin/server/overview) * [Keycloak Competence Center by Inventage AG](https://keycloak.ch/) * [Keycloak as a Service](https://www.cloud-iam.com) ## Miscellaneous * [Find sites using Keycloak with google](https://www.google.de/search?q=inurl%3Aauth+inurl%3Arealms+inurl%3Aprotocol&oq=inurl%3A&client=ubuntu&sourceid=chrome&ie=UTF-8) * [Keycloak Dev Bookmarks](http://bookmarks.dev/search?q=keycloak) - Use the tag [keycloak](https://www.bookmarks.dev/tagged/keycloak) * [Use fail2ban to block brute-force attacks to keycloak server](https://gist.github.com/drmalex07/3eba8b98d0ac4a1e821e8e721b3e1816) * [Pentest-Report Keycloak 8.0 Audit & Pentest 11.2019 by Cure53](https://cure53.de/pentest-report_keycloak.pdf) * [Keycloak - CNCF Security SIG - Self Assesment](https://docs.google.com/document/d/14IIGliP3BWjdS-0wfOk3l_1AU8kyoSiLUzpPImsz4R0/edit#) # License [![CC0](http://mirrors.creativecommons.org/presskit/buttons/88x31/svg/cc-zero.svg)](https://creativecommons.org/publicdomain/zero/1.0/) To the extent possible under law, [Thomas Darimont](https://github.com/thomasdarimont) has waived all copyright and related or neighboring rights to this work.

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BSL-1.0

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🚀 Problem Statement

🏗️ Design Decisions & Trade-offs

1. Java + Spring Boot (Backend)

2. Vanilla JavaScript (Frontend)

3. JWT Auth via HS256 (Stateless)

4. Dual Database Profiles: H2 & PostgreSQL

5. First-User-Becomes-Admin Pattern

6. Single Monolithic Container

⚖️ Known Limitations

📈 What I'd Do Differently at Scale

1. Decouple Identity & Access Management (IAM)

2. Event-Driven Architecture & Async Writes

3. Read Replicas & CQRS

4. Separate & Modernize the Frontend

5. Multi-Stage CI/CD Deployment Pipeline

6. Observability Stack Integration

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