Diagnosing keycloak connection refused error from a server hosted in the Kubernetes container
The following is a trail of steps down the path of an investigation that has proved time consuming and hard to resolve. Before we begin some introduction to the terminology may help explain the problem. These include the following:
A keycloak server is an identity management framework that has allows Independent identity providers to be configured
A Kubernetes framework is an orchestration framework that hosts application such as Keycloak and alleviates the automation efforts of servicing and scaling the resources used.
A container is a lightweight host for an I stance if the application and includes the operating system which is isolated for that application
A connection refused error comes from the keycloak server usually due to some configuration error
The diagnosis of the exact configuration error and location requires thorough investigation of all the aspects of the deployment pertaining to connectivity because this internal error could have ripple symptoms all the way to external boundary
The dns entry for the keycloak server should allow reaching the server by its name rather than by the cluster master ip address.
The IDENTITY_SERVER_URL must be configured properly with the scheme, address, port, path and qualifier.
The ingress resource for the service must respond be properly configured to translate the external connection with the internal connection to the backend. An improper connection will promptly result in “default backend 404” error. In the case of Keycloak the external facing host and port for the ingress maybe set to keycloak.myrealm.cluster.local and the port is 80 for http and 443 for SSL. The backend is usually available at port 8080 for Keycloak server.
The application server itself has a lot of settings that can be configured with application.properties, configuration.xml, and command line options. In addition settings can also be defined via passing them to the keycloak via proprietary files that have a “.cli” extension.
The command line can include a 0.0.0.0 option to bind the application to all available network interface as opposed to the localhost ip address of 127.0.0.1
The jboss.bind.address.management can also include this address instead of localhost. These settings do not need to be in conflict.
The security context of the container does not need to be elevated for connect to work and they can allow the keycloak server to run as jboss user
The application.properties can include a role setting such as follows:
keycloak.securityConstraints[0].authRoles[0]=* keycloak.securityConstraints[0].securityCollections[0].patterns[0]=/*
The trouble encountered during diagnosis include settings that don’t get applied, settings getting reset, typo in settings or multiple sources for the same settings.
The following is a trail of steps down the path of an investigation that has proved time consuming and hard to resolve. Before we begin some introduction to the terminology may help explain the problem. These include the following:
A keycloak server is an identity management framework that has allows Independent identity providers to be configured
A Kubernetes framework is an orchestration framework that hosts application such as Keycloak and alleviates the automation efforts of servicing and scaling the resources used.
A container is a lightweight host for an I stance if the application and includes the operating system which is isolated for that application
A connection refused error comes from the keycloak server usually due to some configuration error
The diagnosis of the exact configuration error and location requires thorough investigation of all the aspects of the deployment pertaining to connectivity because this internal error could have ripple symptoms all the way to external boundary
The dns entry for the keycloak server should allow reaching the server by its name rather than by the cluster master ip address.
The IDENTITY_SERVER_URL must be configured properly with the scheme, address, port, path and qualifier.
The ingress resource for the service must respond be properly configured to translate the external connection with the internal connection to the backend. An improper connection will promptly result in “default backend 404” error. In the case of Keycloak the external facing host and port for the ingress maybe set to keycloak.myrealm.cluster.local and the port is 80 for http and 443 for SSL. The backend is usually available at port 8080 for Keycloak server.
The application server itself has a lot of settings that can be configured with application.properties, configuration.xml, and command line options. In addition settings can also be defined via passing them to the keycloak via proprietary files that have a “.cli” extension.
The command line can include a 0.0.0.0 option to bind the application to all available network interface as opposed to the localhost ip address of 127.0.0.1
The jboss.bind.address.management can also include this address instead of localhost. These settings do not need to be in conflict.
The security context of the container does not need to be elevated for connect to work and they can allow the keycloak server to run as jboss user
The application.properties can include a role setting such as follows:
keycloak.securityConstraints[0].authRoles[0]=* keycloak.securityConstraints[0].securityCollections[0].patterns[0]=/*
The trouble encountered during diagnosis include settings that don’t get applied, settings getting reset, typo in settings or multiple sources for the same settings.
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