Binding to target [Bindable@6b33887e type = org.keycloak.adapters.springboot.KeycloakSpringBootProperties, value = 'provided', annotations = array<Annotation>[@org.springframework.boot.context.properties.ConfigurationProperties(ignoreInvalidFields=false, ignoreUnknownFields=false, prefix=keycloak, value=keycloak)]] failed:

    Property: keycloak.server.adminuser.password
    Value: pass
    Origin: class path resource [application.properties]:11:36
    Reason: The elements [keycloak.server.adminuser.password,keycloak.server.adminuser.username,keycloak.server.contextpath,keycloak.server.realmimportfile] were left unbound.
    Property: keycloak.server.adminuser.username
    Value: bael-admin
    Origin: class path resource [application.properties]:10:36
    Reason: The elements [keycloak.server.adminuser.password,keycloak.server.adminuser.username,keycloak.server.contextpath,keycloak.server.realmimportfile] were left unbound.
    Property: keycloak.server.contextpath
    Value: /auth
    Origin: class path resource [application.properties]:9:29
    Reason: The elements [keycloak.server.adminuser.password,keycloak.server.adminuser.username,keycloak.server.contextpath,keycloak.server.realmimportfile] were left unbound.
    Property: keycloak.server.realmimportfile
    Value: baeldung-realm.json
    Origin: class path resource [application.properties]:12:33
    Reason: The elements [keycloak.server.adminuser.password,keycloak.server.adminuser.username,keycloak.server.contextpath,keycloak.server.realmimportfile] were left unbound.

Action:

Update your application's configuration

spring.jpa.hibernate.ddl-auto=validate

spring.datasource.driver-class-name=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost:5432/hotel
spring.datasource.username=postgres
spring.datasource.password=321
spring.mustache.expose-request-attributes=true

keycloak.server.contextPath=/auth
keycloak.server.adminUser.username=bael-admin
keycloak.server.adminUser.password=pass
keycloak.server.realmImportFile=baeldung-realm.json