Merge branch 'master' into feature/refactor-context-initilization

Author: shahzad31

.github/CODEOWNERS

@@ -132,6 +132,9 @@
 /x-pack/test/alerting_api_integration @elastic/kibana-alerting-services
 /x-pack/test/plugin_api_integration/plugins/task_manager @elastic/kibana-alerting-services
 /x-pack/test/plugin_api_integration/test_suites/task_manager @elastic/kibana-alerting-services
+/x-pack/legacy/plugins/triggers_actions_ui/ @elastic/kibana-alerting-services
+/x-pack/test/functional_with_es_ssl/apps/triggers_actions_ui/ @elastic/kibana-alerting-services
+/x-pack/test/functional_with_es_ssl/fixtures/plugins/alerts/ @elastic/kibana-alerting-services
 
 # Design
 **/*.scss  @elastic/kibana-design

docs/development/core/server/kibana-plugin-server.basepath.get.md

@@ -9,5 +9,5 @@ returns `basePath` value, specific for an incoming request.
 <b>Signature:</b>
 
 ```typescript
-get: (request: KibanaRequest<unknown, unknown, unknown, any> | LegacyRequest) => string;
+get: (request: LegacyRequest | KibanaRequest<unknown, unknown, unknown, any>) => string;
 ```

docs/development/core/server/kibana-plugin-server.basepath.md

@@ -20,9 +20,9 @@ The constructor for this class is marked as internal. Third-party code should no
 
 |  Property | Modifiers | Type | Description |
 |  --- | --- | --- | --- |
-|  [get](./kibana-plugin-server.basepath.get.md) |  | <code>(request: KibanaRequest&lt;unknown, unknown, unknown, any&gt; &#124; LegacyRequest) =&gt; string</code> | returns <code>basePath</code> value, specific for an incoming request. |
+|  [get](./kibana-plugin-server.basepath.get.md) |  | <code>(request: LegacyRequest &#124; KibanaRequest&lt;unknown, unknown, unknown, any&gt;) =&gt; string</code> | returns <code>basePath</code> value, specific for an incoming request. |
 |  [prepend](./kibana-plugin-server.basepath.prepend.md) |  | <code>(path: string) =&gt; string</code> | Prepends <code>path</code> with the basePath. |
 |  [remove](./kibana-plugin-server.basepath.remove.md) |  | <code>(path: string) =&gt; string</code> | Removes the prepended basePath from the <code>path</code>. |
 |  [serverBasePath](./kibana-plugin-server.basepath.serverbasepath.md) |  | <code>string</code> | returns the server's basePath<!-- -->See [BasePath.get](./kibana-plugin-server.basepath.get.md) for getting the basePath value for a specific request |
-|  [set](./kibana-plugin-server.basepath.set.md) |  | <code>(request: KibanaRequest&lt;unknown, unknown, unknown, any&gt; &#124; LegacyRequest, requestSpecificBasePath: string) =&gt; void</code> | sets <code>basePath</code> value, specific for an incoming request. |
+|  [set](./kibana-plugin-server.basepath.set.md) |  | <code>(request: LegacyRequest &#124; KibanaRequest&lt;unknown, unknown, unknown, any&gt;, requestSpecificBasePath: string) =&gt; void</code> | sets <code>basePath</code> value, specific for an incoming request. |
 

docs/development/core/server/kibana-plugin-server.basepath.set.md

@@ -9,5 +9,5 @@ sets `basePath` value, specific for an incoming request.
 <b>Signature:</b>
 
 ```typescript
-set: (request: KibanaRequest<unknown, unknown, unknown, any> | LegacyRequest, requestSpecificBasePath: string) => void;
+set: (request: LegacyRequest | KibanaRequest<unknown, unknown, unknown, any>, requestSpecificBasePath: string) => void;
 ```

docs/development/core/server/kibana-plugin-server.uisettingsparams.deprecation.md

@@ -0,0 +1,13 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [UiSettingsParams](./kibana-plugin-server.uisettingsparams.md) &gt; [deprecation](./kibana-plugin-server.uisettingsparams.deprecation.md)
+
+## UiSettingsParams.deprecation property
+
+optional deprecation information. Used to generate a deprecation warning.
+
+<b>Signature:</b>
+
+```typescript
+deprecation?: DeprecationSettings;
+```

docs/development/core/server/kibana-plugin-server.uisettingsparams.md

@@ -17,12 +17,14 @@ export interface UiSettingsParams
 |  Property | Type | Description |
 |  --- | --- | --- |
 |  [category](./kibana-plugin-server.uisettingsparams.category.md) | <code>string[]</code> | used to group the configured setting in the UI |
+|  [deprecation](./kibana-plugin-server.uisettingsparams.deprecation.md) | <code>DeprecationSettings</code> | optional deprecation information. Used to generate a deprecation warning. |
 |  [description](./kibana-plugin-server.uisettingsparams.description.md) | <code>string</code> | description provided to a user in UI |
 |  [name](./kibana-plugin-server.uisettingsparams.name.md) | <code>string</code> | title in the UI |
 |  [optionLabels](./kibana-plugin-server.uisettingsparams.optionlabels.md) | <code>Record&lt;string, string&gt;</code> | text labels for 'select' type UI element |
 |  [options](./kibana-plugin-server.uisettingsparams.options.md) | <code>string[]</code> | array of permitted values for this setting |
 |  [readonly](./kibana-plugin-server.uisettingsparams.readonly.md) | <code>boolean</code> | a flag indicating that value cannot be changed |
 |  [requiresPageReload](./kibana-plugin-server.uisettingsparams.requirespagereload.md) | <code>boolean</code> | a flag indicating whether new value applying requires page reloading |
 |  [type](./kibana-plugin-server.uisettingsparams.type.md) | <code>UiSettingsType</code> | defines a type of UI element [UiSettingsType](./kibana-plugin-server.uisettingstype.md) |
+|  [validation](./kibana-plugin-server.uisettingsparams.validation.md) | <code>ImageValidation &#124; StringValidation</code> |  |
 |  [value](./kibana-plugin-server.uisettingsparams.value.md) | <code>SavedObjectAttribute</code> | default value to fall back to if a user doesn't provide any |
 

docs/development/core/server/kibana-plugin-server.uisettingsparams.validation.md

@@ -0,0 +1,11 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-server](./kibana-plugin-server.md) &gt; [UiSettingsParams](./kibana-plugin-server.uisettingsparams.md) &gt; [validation](./kibana-plugin-server.uisettingsparams.validation.md)
+
+## UiSettingsParams.validation property
+
+<b>Signature:</b>
+
+```typescript
+validation?: ImageValidation | StringValidation;
+```

docs/management/advanced-options.asciidoc

@@ -187,7 +187,8 @@ Refresh the page to apply the changes.
 === Search settings
 
 [horizontal]
-`courier:batchSearches`:: When disabled, dashboard panels will load individually, and search requests will terminate when
+`courier:batchSearches`:: **Deprecated in 7.6. Starting in 8.0, this setting will be optimized internally.**
+When disabled, dashboard panels will load individually, and search requests will terminate when
 users navigate away or update the query. When enabled, dashboard panels will load together when all of the data is loaded,
 and searches will not terminate.
 `courier:customRequestPreference`:: {ref}/search-request-body.html#request-body-search-preference[Request preference]

docs/setup/production.asciidoc

@@ -4,7 +4,8 @@
 * <<configuring-kibana-shield>>
 * <<csp-strict-mode>>
 * <<enabling-ssl>>
-* <<load-balancing>>
+* <<load-balancing-es>>
+* <<load-balancing-kibana>>
 * <<high-availability>>
 * <<memory>>
 
@@ -18,7 +19,7 @@ While Kibana isn't terribly resource intensive, we still recommend running Kiban
 separate from  your Elasticsearch data or master nodes. To distribute Kibana
 traffic across the nodes in your Elasticsearch cluster, you can run Kibana
 and an Elasticsearch client node on the same machine. For more information, see
-<<load-balancing, Load Balancing Across Multiple Elasticsearch Nodes>>.
+<<load-balancing-es, Load balancing across multiple Elasticsearch nodes>>.
 
 [float]
 [[configuring-kibana-shield]]
@@ -63,7 +64,7 @@ csp.strict: true
 See <<configuring-tls>>.
 
 [float]
-[[load-balancing]]
+[[load-balancing-es]]
 === Load Balancing Across Multiple Elasticsearch Nodes
 If you have multiple nodes in your Elasticsearch cluster, the easiest way to distribute Kibana requests
 across the nodes is to run an Elasticsearch _Coordinating only_ node on the same machine as Kibana.
@@ -110,9 +111,40 @@ transport.tcp.port: 9300 - 9400
 elasticsearch.hosts: ["http://localhost:9200"]
 --------
 
+[float]
+[[load-balancing-kibana]]
+=== Load balancing across multiple Kibana instances
+To serve multiple Kibana installations behind a load balancer, you must change the configuration. See {kibana-ref}/settings.html[Configuring Kibana] for details on each setting.
+
+Settings unique across each Kibana instance:
+--------
+server.uuid
+server.name
+--------
+
+Settings unique across each host (for example, running multiple installations on the same virtual machine):
+--------
+logging.dest
+path.data
+pid.file
+server.port
+--------
+
+Settings that must be the same:
+--------
+xpack.security.encryptionKey //decrypting session cookies
+xpack.reporting.encryptionKey //decrypting reports stored in Elasticsearch
+--------
+
+Separate configuration files can be used from the command line by using the `-c` flag:
+--------
+bin/kibana -c config/instance1.yml
+bin/kibana -c config/instance2.yml
+--------
+
 [float]
 [[high-availability]]
-=== High Availability Across Multiple Elasticsearch Nodes
+=== High availability across multiple Elasticsearch nodes
 Kibana can be configured to connect to multiple Elasticsearch nodes in the same cluster.  In situations where a node becomes unavailable,
 Kibana will transparently connect to an available node and continue operating.  Requests to available hosts will be routed in a round robin fashion.
 

examples/state_containers_examples/public/todo.tsx

@@ -41,6 +41,7 @@ import {
   PureTransition,
   syncStates,
   getStateFromKbnUrl,
+  BaseState,
 } from '../../../src/plugins/kibana_utils/public';
 import { useUrlTracker } from '../../../src/plugins/kibana_react/public';
 import {
@@ -79,7 +80,7 @@ const TodoApp: React.FC<TodoAppProps> = ({ filter }) => {
   const { setText } = GlobalStateHelpers.useTransitions();
   const { text } = GlobalStateHelpers.useState();
   const { edit: editTodo, delete: deleteTodo, add: addTodo } = useTransitions();
-  const todos = useState();
+  const todos = useState().todos;
   const filteredTodos = todos.filter(todo => {
     if (!filter) return true;
     if (filter === 'completed') return todo.completed;
@@ -306,22 +307,18 @@ export const TodoAppPage: React.FC<{
   );
 };
 
-function withDefaultState<State>(
+function withDefaultState<State extends BaseState>(
   stateContainer: BaseStateContainer<State>,
   // eslint-disable-next-line no-shadow
   defaultState: State
 ): INullableBaseStateContainer<State> {
   return {
     ...stateContainer,
     set: (state: State | null) => {
-      if (Array.isArray(defaultState)) {
-        stateContainer.set(state || defaultState);
-      } else {
-        stateContainer.set({
-          ...defaultState,
-          ...state,
-        });
-      }
+      stateContainer.set({
+        ...defaultState,
+        ...state,
+      });
     },
   };
 }