Gemini connector integration

.github/CODEOWNERS

@@ -1497,6 +1497,11 @@ x-pack/test/security_solution_cypress/cypress/tasks/expandable_flyout  @elastic/
 /x-pack/plugins/stack_connectors/server/connector_types/bedrock @elastic/security-generative-ai
 /x-pack/plugins/stack_connectors/common/bedrock @elastic/security-generative-ai
 
+# Gemini
+/x-pack/plugins/stack_connectors/public/connector_types/gemini @elastic/security-generative-ai
+/x-pack/plugins/stack_connectors/server/connector_types/gemini @elastic/security-generative-ai
+/x-pack/plugins/stack_connectors/common/gemini @elastic/security-generative-ai
+
 ## Defend Workflows owner connectors
 /x-pack/plugins/stack_connectors/public/connector_types/sentinelone @elastic/security-defend-workflows
 /x-pack/plugins/stack_connectors/server/connector_types/sentinelone @elastic/security-defend-workflows

docs/management/action-types.asciidoc

@@ -20,6 +20,10 @@ a| <<d3security-action-type,D3 Security>>
 
 | Send a request to D3 Security.
 
+a| <<gemini-action-type,{gemini}>>
+
+| Send a request to {gemini}.
+
 a| <<email-action-type,Email>>
 
 | Send email from your server.

docs/management/connectors/action-types/gemini.asciidoc

@@ -0,0 +1,74 @@
+[[gemini-action-type]]
+== {gemini} connector and action
+++++
+<titleabbrev>{gemini}</titleabbrev>
+++++
+:frontmatter-description: Add a connector that can send requests to {gemini}.
+:frontmatter-tags-products: [kibana] 
+:frontmatter-tags-content-type: [how-to] 
+:frontmatter-tags-user-goals: [configure]
+
+
+The {gemini} connector uses https://github.com/axios/axios[axios] to send a POST request to {gemini}. The connector uses the <<execute-connector-api,run connector API>> to send the request.
+
+[float]
+[[define-gemini-ui]]
+=== Create connectors in {kib}
+
+You can create connectors in *{stack-manage-app} > {connectors-ui}*.  For example:
+
+[role="screenshot"]
+image::management/connectors/images/gemini-connector.png[{gemini} connector]
+// NOTE: This is an autogenerated screenshot. Do not edit it directly.
+
+[float]
+[[gemini-connector-configuration]]
+==== Connector configuration
+
+{gemini} connectors have the following configuration properties:
+
+Name::      The name of the connector.
+API URL::   The {gemini} request URL.
+PROJECT ID:: The project which has Vertex AI endpoint enabled.
+Region:: The GCP region where the Vertex AI endpoint enabled.
+Default model:: The GAI model for {gemini} to use. Current support is for the Google Gemini models, defaulting to gemini-1.5-pro-preview-0409. The model can be set on a per request basis by including a "model" parameter alongside the request body.
+Credentials JSON:: The GCP service account JSON file for authentication.
+
+[float]
+[[gemini-action-configuration]]
+=== Test connectors
+
+You can test connectors with the <<execute-connector-api,run connector API>> or
+as you're creating or editing the connector in {kib}. For example:
+
+[role="screenshot"]
+image::management/connectors/images/gemini-params.png[{gemini} params test]
+// NOTE: This is an autogenerated screenshot. Do not edit it directly.
+
+The {gemini} actions have the following configuration properties.
+
+Body::      A stringified JSON payload sent to the {gemini} Invoke Model API URL. For example:
++
+[source,text]
+--
+
+{
+  body: JSON.stringify({
+        contents: [{
+            role: user,
+            parts: [{ text: 'Write the first line of a story about a magic backpack.' }]
+        }],
+        generation_config: {
+            temperature: 0,
+            maxOutputTokens: 8192
+        }
+  })
+}
+--
+Model::      An optional string that will overwrite the connector's default model. For 
+
+[float]
+[[gemini-connector-networking-configuration]]
+=== Connector networking configuration
+
+Use the <<action-settings, Action configuration settings>> to customize connector networking configurations, such as proxies, certificates, or TLS settings. You can set configurations that apply to all your connectors or use `xpack.actions.customHostSettings` to set per-host configurations.

docs/management/connectors/index.asciidoc

@@ -2,6 +2,7 @@ include::action-types/bedrock.asciidoc[leveloffset=+1]
 include::action-types/cases-action-type.asciidoc[leveloffset=+1]
 include::action-types/d3security.asciidoc[leveloffset=+1]
 include::action-types/email.asciidoc[leveloffset=+1]
+include::action-types/gemini.asciidoc[leveloffset=+1]
 include::action-types/resilient.asciidoc[leveloffset=+1]
 include::action-types/index.asciidoc[leveloffset=+1]
 include::action-types/jira.asciidoc[leveloffset=+1]

docs/settings/alert-action-settings.asciidoc

@@ -138,7 +138,7 @@ WARNING: This feature is available in {kib} 7.17.4 and 8.3.0 onwards but is not
 A boolean value indicating that a footer with a relevant link should be added to emails sent as alerting actions. Default: true.
 
 `xpack.actions.enabledActionTypes` {ess-icon}::
-A list of action types that are enabled. It defaults to `["*"]`, enabling all types. The names for built-in {kib} action types are prefixed with a `.` and include: `.email`, `.index`, `.jira`, `.opsgenie`, `.pagerduty`, `.resilient`, `.server-log`, `.servicenow`, .`servicenow-itom`, `.servicenow-sir`, `.slack`, `.swimlane`, `.teams`, `.tines`, `.torq`, `.xmatters`,  `.gen-ai`,  `.bedrock`,  `.d3security`, and `.webhook`. An empty list `[]` will disable all action types.
+A list of action types that are enabled. It defaults to `["*"]`, enabling all types. The names for built-in {kib} action types are prefixed with a `.` and include: `.email`, `.index`, `.jira`, `.opsgenie`, `.pagerduty`, `.resilient`, `.server-log`, `.servicenow`, .`servicenow-itom`, `.servicenow-sir`, `.slack`, `.swimlane`, `.teams`, `.tines`, `.torq`, `.xmatters`,  `.gen-ai`,  `.bedrock`, `.gemini`,  `.d3security`, and `.webhook`. An empty list `[]` will disable all action types.
 +
 Disabled action types will not appear as an option when creating new connectors, but existing connectors and actions of that type will remain in {kib} and will not function.
 
@@ -277,6 +277,7 @@ A configuration URL that varies by connector:
 +
 --
 * For an <<bedrock-action-type,{bedrock} connector>>, specifies the {bedrock} request URL.
+* For an <<gemini-action-type,{gemini} connector>>, specifies the {gemini} request URL.
 * For a <<openai-action-type,OpenAI connector>>, specifies the OpenAI request URL.
 * For a <<resilient-action-type,{ibm-r} connector>>, specifies the {ibm-r} instance URL.
 * For a <<jira-action-type,Jira connector>>, specifies the Jira instance URL.
@@ -341,6 +342,7 @@ The default model to use for requests, which varies by connector:
 +
 --
 * For an <<bedrock-action-type,{bedrock} connector>>, current support is for the Anthropic Claude models. Defaults to `anthropic.claude-3-sonnet-20240229-v1:0`.
+* For a <<gemini-action-type,{gemini} connector>>, current support is for the Gemini models. Defaults to `gemini-1.5-pro-preview-0409`.
 * For a <<openai-action-type,OpenAI connector>>, it is optional and applicable only when `xpack.actions.preconfigured.<connector-id>.config.apiProvider` is `OpenAI`.
 --
 
@@ -483,6 +485,9 @@ For an <<bedrock-action-type,{bedrock} connector>>, specifies the AWS access key
 
 `xpack.actions.preconfigured.<connector-id>.secrets.apikey`::
 An API key secret that varies by connector:
+
+`xpack.actions.preconfigured.<connector-id>.secrets.credentialsJSON`::
+For an <<gemini-action-type,{gemini} connector>>, specifies the GCP service account credentials JSON file for authentication.
 +
 --
 * For a <<openai-action-type,OpenAI connector>>, specifies the OpenAI or Azure OpenAI API key for authentication.

package.json

@@ -1030,6 +1030,7 @@
     "getopts": "^2.2.5",
     "getos": "^3.1.0",
     "globby": "^11.1.0",
+    "google-auth-library": "^9.10.0",
     "gpt-tokenizer": "^2.1.2",
     "handlebars": "4.7.8",
     "he": "^1.2.0",

x-pack/packages/kbn-elastic-assistant/impl/mock/connectors.ts

@@ -29,6 +29,16 @@ export const mockActionTypes = [
     isSystemActionType: true,
     supportedFeatureIds: ['generativeAI'],
   } as ActionType,
+  {
+    id: '.gemini',
+    name: 'Gemini',
+    enabled: true,
+    enabledInConfig: true,
+    enabledInLicense: true,
+    minimumLicenseRequired: 'basic',
+    isSystemActionType: true,
+    supportedFeatureIds: ['generativeAI'],
+  } as ActionType,
 ];
 
 export const mockConnectors: AIConnector[] = [