🚀 Master Keycloak + Spring Boot 3 Security | 90-Min Production OAuth2 Project 2026
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In this comprehensive tutorial, we go beyond surface-level setup to build a fully secure Spring Boot 3 application using Keycloak and OAuth2. You will learn how to configure Keycloak via Docker, customize the Spring Security login flow, properly manage multi-system user sessions (OIDC logout), and implement fine-grained Role-Based Access Control (RBAC) by extracting custom roles from Keycloak's JWT claims.
🔗 Resources & Code:
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Contents
00:00:00 Intro
00:00:42 Installing Keycloak
00:05:11 Keycloak Admin Configuration
00:07:55 Understanding Realms
00:10:25 Creating Client in Keycloak
00:14:30 Creating Roles (Admin, Manager, User)
00:15:27 Creating Users & Assigning Roles
00:19:52 Spring Boot Project Setup
00:24:23 Adding OAuth2 & Keycloak Configuration
00:29:05 First Login with Keycloak
00:31:12 Customizing Spring Security Configuration
00:33:51 Custom Login Page in Spring Boot
00:37:28 Styling Login Page with Tailwind
00:41:41 Building Home Page
00:50:19 Understanding Session & Logout Behavior
00:51:24 Implementing Proper Keycloak Logout
00:54:16 Creating Role-Based Dashboards
01:06:09 Role-Based Access Control (RBAC)
01:09:06 Why Roles Not Working (Deep Dive)
01:12:32 Extracting Roles from Access Token
01:24:50 Showing UI by Role
01:26:18 Final Demo & Wrap-Up
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