Configure Kibana to use SAML with Google Workspace (Google Apps, G Suite)

README.md

The following worked with Elastic Cloud, Elasticsearch & Kibana v7.6.0. It should be pretty close for other kinds of deployments. Before starting, make sure you have the right license level that allows SAML.

Create SAML App in Google Workspace:

• Navigate to the SAML apps section of the admin console

• Click the Add button and choose to "Add custom SAML app"

• Write down the Entity ID and download the Idp metadata file

• Choose application name, description and add logo

• In the "Service Provider Details" screen add the following:

  • ACS URL: https://<kibana url>:9243/api/security/v1/saml
  • Entity ID: https://<kibana url>:9243/
  • Start URL: https://<kibana url>:9243/
  • Name ID: Basic Information | Primary Email
  • Name ID Format: Email

• Skip attribute mapping and click "Finished"

• Enable SAML app to be in "On for everyone" status

Create and upload the metadata bundle:

• Rename the metadata file to metadata.xml

• Place the file in folder named saml

• Compress the folder into zip file.

• Navigate to the custom plugins section under your Elastic account

• Add a new plugin:

  • Plugin name: <whatever you like, e.g gsuite-saml>
  • Version: *
  • Description: <whatever you like>

• Upload the zip file created above

Configure Kibana's role mapping

• In Kibana navigate to: Managment -> Security -> Role mappings

• Create a new role mapping:

  • Roles: Whatever roles you need
  • Add the following mapping rule:
    • User filed: realm.name
    • Type: text
    • Value: <realm name from elasticsearch.yml. e.g gsuite>

Configure Elasticsearch and Kibana

• Under the Elasticsearch deployment configuration go Edit screen
• Enable the gsuite-saml plugin under "Elasticsearch plugins and settings"
• Paste the content of elasticsearch.yml to "User setting overrides" in the Elasticsearch section
• Paste the content of kibana.yml to "User setting overrides" in the Kibana section
• Click Save and wait for the re-deloyment to finish successfully

If everything went smooth, you should be able to point your browser to Kibana and get authenticated with your Google account.

Reference

• https://www.elastic.co/guide/en/cloud/current/ec-securing-clusters-SAML.html
• https://www.elastic.co/guide/en/cloud/current/ec-custom-bundles.html

elasticsearch.yml

# make sure to adjust values accordingally before pasting.
# the "gsuite" key is arbitrary. you can choose whatever name you like.
# you'll need to use it in kibana.yml as the value for "xpack.security.authc.saml.realm" 
# and in the role mapping rules

xpack.security.authc.realms.saml.gsuite: 
  order: 2
  attributes.principal: "nameid" 
  attributes.groups: "groups" 
  idp.metadata.path: "/app/config/saml/metadata.xml" 
  idp.entity_id: "https://accounts.google.com/o/saml2?idpid=XXXXXXXXX <Entity id from Google Workspace>" 
  sp.entity_id: "https://<kibana url>:9243/" 
  sp.acs: "https://<kibana url>:9243/api/security/v1/saml"
  sp.logout: "https://<kibana url>:9243/logout"

kibana.yml

# this enables both saml and basic (built in) auth.
# to use basic auth while saml is on, use https://<kibana url>:9243/login
# you might need to clear cache/cookies or use incognito

xpack.security.authc.providers: [saml,basic]
server.xsrf.whitelist: [/api/security/v1/saml]
xpack.security.authc.saml.realm: gsuite

Dunno if it depends on the Google Workspace subscription or if this is a newer development, but I've been able forward group membership from the Google Workspace IdP to the SP and use it in role mapping directly. The Google Workspace Documentation also seems pretty unequivocal about this:

After having mapped the groups on Google Workspace IdP to an "App attribute" (in our case named google_groups), I've been able to use it successfully for role mapping:

Kibana user settings:

xpack.security.authc.realms.saml.saml1:
  order: 2
  attributes.principal: "nameid" 
  attributes.groups: "google_groups" 
  ...

Role mapping rule:

{
  "all": [
    {
      "field": {
        "realm.name": "saml1"
      }
    },
    {
      "field": {
        "groups": "staff"
      }
    }
  ]
}

@sm3142 This should be the new accepted answer. Managed to set up google group membership as detailed above.

Throwing in another update I think might be relevant, Kibana configs changed a bit too, for a 8.10+ elastic cloud deployment this seems to do the job:

xpack.security.authc.providers:
  saml.gsuite:
    order: 0
    realm: gsuite
    description: "Log in with Google"
  basic.basic1:
    order: 1