Continuing the discussion from Integrate Keycloak with Camunda - custom permissions:
Hello @Drago_Mazic,
I am trying to integrate Keycloak and Camunda7 but I am not able to do,
I am not getting a proper starting point as camunda and spring security are clasing and Keycloak as well. So could you please guide me through it as you have done integration before.
Kind Regards,
Shoeb Sayyed
Thanks for the reply @aravindhrs the article was very helpful
but I am not able to start the service as I am getting the following exceptions
Cannot instantiate authentication filter: authentication provider not found
javax.servlet.ServletException: Cannot instantiate authentication filter: authentication provider not found
at org.camunda.bpm.webapp.impl.security.auth.ContainerBasedAuthenticationFilter.init(ContainerBasedAuthenticationFilter.java:64) ~[camunda-webapp-7.19.0-classes.jar:7.19.0]
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:272) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:106) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4609) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5248) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1393) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1383) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:145) ~[na:na]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:916) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:835) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1393) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1383) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:145) ~[na:na]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:916) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:265) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:430) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:486) ~[tomcat-embed-core-9.0.71.jar:9.0.71]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:123) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.(TomcatWebServer.java:104) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:481) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:211) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:184) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:162) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:577) ~[spring-context-5.3.25.jar:5.3.25]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292) ~[spring-boot-2.7.9.jar:2.7.9]
at com.example.workflow.Application.main(Application.java:10) ~[classes/:na]
Caused by: java.lang.ClassNotFoundException: de.accso.camunda.showcase.sso.KeycloakAuthenticationProvider
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[na:na]
at java.base/java.lang.Class.forName0(Native Method) ~[na:na]
at java.base/java.lang.Class.forName(Class.java:375) ~[na:na]
at org.camunda.bpm.webapp.impl.security.auth.ContainerBasedAuthenticationFilter.init(ContainerBasedAuthenticationFilter.java:61) ~[camunda-webapp-7.19.0-classes.jar:7.19.0]
… 40 common frames omitted
2023-08-11 23:40:53.178 ERROR 32012 — [ main] o.apache.catalina.core.StandardContext : One or more Filters failed to start. Full details will be found in the appropriate container log file
2023-08-11 23:40:53.179 ERROR 32012 — [ main] o.apache.catalina.core.StandardContext : Context [] startup failed due to previous errors
2023-08-11 23:40:53.306 INFO 32012 — [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2023-08-11 23:40:53.312 WARN 32012 — [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
2023-08-11 23:40:53.331 INFO 32012 — [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with ‘debug’ enabled.
2023-08-11 23:40:53.378 ERROR 32012 — [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:165) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:577) ~[spring-context-5.3.25.jar:5.3.25]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:731) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292) ~[spring-boot-2.7.9.jar:2.7.9]
at com.example.workflow.Application.main(Application.java:10) ~[classes/:na]
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:142) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.(TomcatWebServer.java:104) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:481) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:211) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:184) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:162) ~[spring-boot-2.7.9.jar:2.7.9]
… 8 common frames omitted
Caused by: java.lang.IllegalStateException: StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[] failed to start
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.rethrowDeferredStartupExceptions(TomcatWebServer.java:187) ~[spring-boot-2.7.9.jar:2.7.9]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:126) ~[spring-boot-2.7.9.jar:2.7.9]
… 13 common frames omitted
Yaml Config as follows
spring.datasource.url: jdbc:h2:file:./camunda-h2-database
spring.security.user.name: demo
spring.security.user.password: demo
server.port : 3030
security:
basic:
enabled: false
oauth2:
client:
client-id: camunda-identity-service
client-secret: *************************************
useUsernameAsCamundaUserId: false
accessTokenUri: https://<domain.com>/auth/realms/camunda/protocol/openid-connect/token
userAuthorizationUri: http://<domain.com>/auth/realms/camunda/protocol/openid-connect/auth
scope: openid profile email
resource:
userInfoUri: http://<domain.com>/auth/realms/camunda/protocol/openid-connect/userinfo
Hi @shoebsayyed118 ,
Regarding that log error, it seems you didn’t extended ContainerBasedAuthenticationProvider.class. I got same response when I removed that class.
Have you tried following the steps from plugin readme ? There are instructions which classes you need to extend, and how to set up keycloak.
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