OpenShift ElasticSearch plugin

This is an OpenShift plugin to ElasticSearch to:

• Dynamically update the SearchGuard ACL based on a user's name
• Transform kibana index requests to support multitenant deployments for non-operations users when so configured.

Note: Previous versions of this plugin created a Kibana profile for each user regardless of their role, which is still the default mode of operation. It is now possible to configure the Kibana index mode to allow operations users to share the Kibana index to store dashboards and visualizations. It is highly recommended that operations teams establish agreements and naming conventions so users do not overwrite each others work.

Configuring the Authorization Backend

searchguard:
  dynamic:
  ...
    authc:
      openshift_domain:
        enabled: true
        order: 0
        http_authenticator:
          challenge: false
          type: io.fabric8.elasticsearch.plugin.auth.OpenShiftTokenAuthentication
        authentication_backend:
          type: io.fabric8.elasticsearch.plugin.auth.OpenShiftTokenAuthentication
          config:
            note: The following is optional and adds the group 'prometheus' to the user if SAR is satisfied
            subjectAccessReviews:
              prometheus:
                namespace: openshift-logging
                verb: view
                resource: prometheus
                resourceAPIGroup: metrics.openshift.io

Configuring your initial ACLs

The OpenShift-Elasticsearch-Plugin assumes the initial ACLs are seeded when the cluster is started.

Action Groups

This plugin will produce role and role mappings that assume certain action groups are defined with the base SearchGuard ACL documents. Samples of the generated roles and role mappings are found in the unit tests. Additional sample ACL document configurations are here. The generated roles and role mappings are periodically expired to reduce the possibility of a mismatch between the allowed permissions and a user's Openshift projects. See the 'Additional Configuration Parameters' to modify the period.

As with sgadmin, the plugin needs to use the certificate with a DN that matches the searchguard.authcz.admin_dn as defined in the ES config to be able to update the Searchguard index. You can specify the certificate and truststore information for the esClient with the following properties:

Configure the projects for '.operations'

You can configure which projects are deemed part of the .operations index for ACL configuration.

In your config file:

openshift.operations.project.names: ["default", "openshift", "openshift-infra"]

The defaults must all be in lower-case to be properly matched.

Additional Configuration Parameters

The following additional parameters can be set in set in elasticsearch.yml:

Note: The io.fabric8.elasticsearch.kibana.mapping.* properties are required and must be defined for the plugin to function. A sample file may be found in the samples folder.

Removed Configuration Parameters

The following config parameters were removed:

Development

Manually install custom version of SearchGuard

• $ mvn install:install-file -Dfile=lib/search-guard-5-5.6.10-19.2-rh.jar -Dpackaging=jar

Following are the dependencies

• [ElasticSearch] (https://github.com/elastic/elasticsearch/tree/5.6.10)
• [Search-Guard] (https://github.com/floragunncom/search-guard/tree)
• [Search-Guard-SSL] (https://github.com/floragunncom/search-guard-ssl/tree)

Remote Debugging deployed to Openshift

• Edit the Elasticsearch deployment config:

  
  $oc edit dc/$ES_DCNAME

* Add environment variable:

... spec: containers:

• env:
  • name: ES_JAVA_OPTS value: -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=4021 ...

    * Forward the debug port 

    oc port-forward $ES_PODNAME 4000:4021

    
    * Attach Eclipse debugger to forwarded port
    ![Debug args](images/eclipse_port_fwd.png)

Debugging and running from Eclipse

Note: Mileage may vary here as this has not been verified since the plugin was compatible with ES1.7x

• Install ES

• Create a run configuration

  • Main Class

  • VM args:

  -Des.path.home=${env_var:ES_HOME} -Delasticsearch -Des.foreground=yes -Dfile.encoding=UTF-8 -Delasticsearch -Xms256m -Xmx1g -Djava.awt.headless=true -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+HeapDumpOnOutOfMemoryError -XX:+DisableExplicitGC

• Environment Variables: