Add server.publicBaseUrl config (#85075)

config/kibana.yml

@@ -18,6 +18,10 @@
 # default to `true` starting in Kibana 7.0.
 #server.rewriteBasePath: false
 
+# Specifies the public URL at which Kibana is available for end users. If
+# `server.basePath` is configured this URL should end with the same basePath.
+#server.publicBaseUrl: ""
+
 # The maximum payload size in bytes for incoming server requests.
 #server.maxPayloadBytes: 1048576
 

docs/development/core/public/kibana-plugin-core-public.ibasepath.md

@@ -18,6 +18,7 @@ export interface IBasePath
 |  --- | --- | --- |
 |  [get](./kibana-plugin-core-public.ibasepath.get.md) | <code>() =&gt; string</code> | Gets the <code>basePath</code> string. |
 |  [prepend](./kibana-plugin-core-public.ibasepath.prepend.md) | <code>(url: string) =&gt; string</code> | Prepends <code>path</code> with the basePath. |
+|  [publicBaseUrl](./kibana-plugin-core-public.ibasepath.publicbaseurl.md) | <code>string</code> | The server's publicly exposed base URL, if configured. Includes protocol, host, port (optional) and the [IBasePath.serverBasePath](./kibana-plugin-core-public.ibasepath.serverbasepath.md)<!-- -->. |
 |  [remove](./kibana-plugin-core-public.ibasepath.remove.md) | <code>(url: string) =&gt; string</code> | Removes the prepended basePath from the <code>path</code>. |
 |  [serverBasePath](./kibana-plugin-core-public.ibasepath.serverbasepath.md) | <code>string</code> | Returns the server's root basePath as configured, without any namespace prefix.<!-- -->See  for getting the basePath value for a specific request |
 

docs/development/core/public/kibana-plugin-core-public.ibasepath.publicbaseurl.md

@@ -0,0 +1,18 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-public](./kibana-plugin-core-public.md) &gt; [IBasePath](./kibana-plugin-core-public.ibasepath.md) &gt; [publicBaseUrl](./kibana-plugin-core-public.ibasepath.publicbaseurl.md)
+
+## IBasePath.publicBaseUrl property
+
+The server's publicly exposed base URL, if configured. Includes protocol, host, port (optional) and the [IBasePath.serverBasePath](./kibana-plugin-core-public.ibasepath.serverbasepath.md)<!-- -->.
+
+<b>Signature:</b>
+
+```typescript
+readonly publicBaseUrl?: string;
+```
+
+## Remarks
+
+Should be used for generating external URL links back to this Kibana instance.
+

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

@@ -22,6 +22,7 @@ The constructor for this class is marked as internal. Third-party code should no
 |  --- | --- | --- | --- |
 |  [get](./kibana-plugin-core-server.basepath.get.md) |  | <code>(request: KibanaRequest &#124; LegacyRequest) =&gt; string</code> | returns <code>basePath</code> value, specific for an incoming request. |
 |  [prepend](./kibana-plugin-core-server.basepath.prepend.md) |  | <code>(path: string) =&gt; string</code> | Prepends <code>path</code> with the basePath. |
+|  [publicBaseUrl](./kibana-plugin-core-server.basepath.publicbaseurl.md) |  | <code>string</code> | The server's publicly exposed base URL, if configured. Includes protocol, host, port (optional) and the [BasePath.serverBasePath](./kibana-plugin-core-server.basepath.serverbasepath.md)<!-- -->. |
 |  [remove](./kibana-plugin-core-server.basepath.remove.md) |  | <code>(path: string) =&gt; string</code> | Removes the prepended basePath from the <code>path</code>. |
 |  [serverBasePath](./kibana-plugin-core-server.basepath.serverbasepath.md) |  | <code>string</code> | returns the server's basePath<!-- -->See [BasePath.get](./kibana-plugin-core-server.basepath.get.md) for getting the basePath value for a specific request |
 |  [set](./kibana-plugin-core-server.basepath.set.md) |  | <code>(request: KibanaRequest &#124; LegacyRequest, requestSpecificBasePath: string) =&gt; void</code> | sets <code>basePath</code> value, specific for an incoming request. |

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

@@ -0,0 +1,18 @@
+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [kibana-plugin-core-server](./kibana-plugin-core-server.md) &gt; [BasePath](./kibana-plugin-core-server.basepath.md) &gt; [publicBaseUrl](./kibana-plugin-core-server.basepath.publicbaseurl.md)
+
+## BasePath.publicBaseUrl property
+
+The server's publicly exposed base URL, if configured. Includes protocol, host, port (optional) and the [BasePath.serverBasePath](./kibana-plugin-core-server.basepath.serverbasepath.md)<!-- -->.
+
+<b>Signature:</b>
+
+```typescript
+readonly publicBaseUrl?: string;
+```
+
+## Remarks
+
+Should be used for generating external URL links back to this Kibana instance.
+

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

@@ -4,6 +4,7 @@
 
 ## HttpServerInfo interface
 
+Information about what hostname, port, and protocol the server process is running on. Note that this may not match the URL that end-users access Kibana at. For the public URL, see [BasePath.publicBaseUrl](./kibana-plugin-core-server.basepath.publicbaseurl.md)<!-- -->.
 
 <b>Signature:</b>
 

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

@@ -86,7 +86,7 @@ The plugin integrates with the core system via lifecycle events: `setup`<!-- -->
 |  [HttpResourcesRenderOptions](./kibana-plugin-core-server.httpresourcesrenderoptions.md) | Allows to configure HTTP response parameters |
 |  [HttpResourcesServiceToolkit](./kibana-plugin-core-server.httpresourcesservicetoolkit.md) | Extended set of [KibanaResponseFactory](./kibana-plugin-core-server.kibanaresponsefactory.md) helpers used to respond with HTML or JS resource. |
 |  [HttpResponseOptions](./kibana-plugin-core-server.httpresponseoptions.md) | HTTP response parameters |
-|  [HttpServerInfo](./kibana-plugin-core-server.httpserverinfo.md) |  |
+|  [HttpServerInfo](./kibana-plugin-core-server.httpserverinfo.md) | Information about what hostname, port, and protocol the server process is running on. Note that this may not match the URL that end-users access Kibana at. For the public URL, see [BasePath.publicBaseUrl](./kibana-plugin-core-server.basepath.publicbaseurl.md)<!-- -->. |
 |  [HttpServiceSetup](./kibana-plugin-core-server.httpservicesetup.md) | Kibana HTTP Service provides own abstraction for work with HTTP stack. Plugins don't have direct access to <code>hapi</code> server and its primitives anymore. Moreover, plugins shouldn't rely on the fact that HTTP Service uses one or another library under the hood. This gives the platform flexibility to upgrade or changing our internal HTTP stack without breaking plugins. If the HTTP Service lacks functionality you need, we are happy to discuss and support your needs. |
 |  [HttpServiceStart](./kibana-plugin-core-server.httpservicestart.md) |  |
 |  [I18nServiceSetup](./kibana-plugin-core-server.i18nservicesetup.md) |  |

docs/setup/settings.asciidoc

@@ -442,6 +442,11 @@ running behind a proxy. Use the <<server-rewriteBasePath, `server.rewriteBasePat
 if it should remove the basePath from requests it receives, and to prevent a
 deprecation warning at startup. This setting cannot end in a slash (`/`).
 
+|[[server-publicBaseUrl]] `server.publicBaseUrl:`
+ | The publicly available URL that end-users access Kibana at. Must include the protocol, hostname, port
+ (if different than the defaults for `http` and `https`, 80 and 443 respectively), and the
+ <<server-basePath, `server.basePath`>> (if configured). This setting cannot end in a slash (`/`).
+
 | [[server-compression]] `server.compression.enabled:`
  | Set to `false` to disable HTTP compression for all responses. *Default: `true`*
 

packages/kbn-config/src/legacy/__snapshots__/legacy_object_to_config_adapter.test.ts.snap

@@ -16,6 +16,7 @@ Object {
   "maxPayload": 1000,
   "name": "kibana-hostname",
   "port": 1234,
+  "publicBaseUrl": "https://myhost.com/abc",
   "rewriteBasePath": false,
   "socketTimeout": 2000,
   "ssl": Object {
@@ -47,6 +48,7 @@ Object {
   "maxPayload": 1000,
   "name": "kibana-hostname",
   "port": 1234,
+  "publicBaseUrl": "http://myhost.com/abc",
   "rewriteBasePath": false,
   "socketTimeout": 2000,
   "ssl": Object {

packages/kbn-config/src/legacy/legacy_object_to_config_adapter.test.ts

@@ -90,6 +90,7 @@ describe('#get', () => {
         keepaliveTimeout: 5000,
         socketTimeout: 2000,
         port: 1234,
+        publicBaseUrl: 'https://myhost.com/abc',
         rewriteBasePath: false,
         ssl: { enabled: true, keyPassphrase: 'some-phrase', someNewValue: 'new' },
         compression: { enabled: true },
@@ -113,6 +114,7 @@ describe('#get', () => {
         keepaliveTimeout: 5000,
         socketTimeout: 2000,
         port: 1234,
+        publicBaseUrl: 'http://myhost.com/abc',
         rewriteBasePath: false,
         ssl: { enabled: false, certificate: 'cert', key: 'key' },
         compression: { enabled: true },

packages/kbn-config/src/legacy/legacy_object_to_config_adapter.ts

@@ -84,6 +84,7 @@ export class LegacyObjectToConfigAdapter extends ObjectToConfigAdapter {
       maxPayload: configValue.maxPayloadBytes,
       name: configValue.name,
       port: configValue.port,
+      publicBaseUrl: configValue.publicBaseUrl,
       rewriteBasePath: configValue.rewriteBasePath,
       ssl: configValue.ssl,
       keepaliveTimeout: configValue.keepaliveTimeout,

src/core/public/chrome/ui/header/__snapshots__/collapsible_nav.test.tsx.snap

@@ -56,6 +56,7 @@ exports[`CollapsibleNav renders links grouped by category 1`] = `
       "basePath": "/test",
       "get": [Function],
       "prepend": [Function],
+      "publicBaseUrl": undefined,
       "remove": [Function],
       "serverBasePath": "/test",
     }
@@ -2078,6 +2079,7 @@ exports[`CollapsibleNav renders the default nav 1`] = `
       "basePath": "/test",
       "get": [Function],
       "prepend": [Function],
+      "publicBaseUrl": undefined,
       "remove": [Function],
       "serverBasePath": "/test",
     }
@@ -2313,6 +2315,7 @@ exports[`CollapsibleNav renders the default nav 2`] = `
       "basePath": "/test",
       "get": [Function],
       "prepend": [Function],
+      "publicBaseUrl": undefined,
       "remove": [Function],
       "serverBasePath": "/test",
     }
@@ -2549,6 +2552,7 @@ exports[`CollapsibleNav renders the default nav 3`] = `
       "basePath": "/test",
       "get": [Function],
       "prepend": [Function],
+      "publicBaseUrl": undefined,
       "remove": [Function],
       "serverBasePath": "/test",
     }

src/core/public/chrome/ui/header/__snapshots__/header.test.tsx.snap

@@ -243,6 +243,7 @@ exports[`Header renders 1`] = `
       "basePath": "/test",
       "get": [Function],
       "prepend": [Function],
+      "publicBaseUrl": undefined,
       "remove": [Function],
       "serverBasePath": "/test",
     }
@@ -5354,6 +5355,7 @@ exports[`Header renders 1`] = `
           "basePath": "/test",
           "get": [Function],
           "prepend": [Function],
+          "publicBaseUrl": undefined,
           "remove": [Function],
           "serverBasePath": "/test",
         }

src/core/public/http/base_path.test.ts

@@ -98,4 +98,13 @@ describe('BasePath', () => {
       expect(new BasePath('/foo/bar', '/foo').serverBasePath).toEqual('/foo');
     });
   });
+
+  describe('publicBaseUrl', () => {
+    it('returns value passed into construtor', () => {
+      expect(new BasePath('/foo/bar', '/foo').publicBaseUrl).toEqual(undefined);
+      expect(new BasePath('/foo/bar', '/foo', 'http://myhost.com/foo').publicBaseUrl).toEqual(
+        'http://myhost.com/foo'
+      );
+    });
+  });
 });

src/core/public/http/base_path.ts

@@ -22,7 +22,8 @@ import { modifyUrl } from '@kbn/std';
 export class BasePath {
   constructor(
     private readonly basePath: string = '',
-    public readonly serverBasePath: string = basePath
+    public readonly serverBasePath: string = basePath,
+    public readonly publicBaseUrl?: string
   ) {}
 
   public get = () => {

src/core/public/http/http_service.ts

@@ -41,7 +41,8 @@ export class HttpService implements CoreService<HttpSetup, HttpStart> {
     const kibanaVersion = injectedMetadata.getKibanaVersion();
     const basePath = new BasePath(
       injectedMetadata.getBasePath(),
-      injectedMetadata.getServerBasePath()
+      injectedMetadata.getServerBasePath(),
+      injectedMetadata.getPublicBaseUrl()
     );
     const fetchService = new Fetch({ basePath, kibanaVersion });
     const loadingCount = this.loadingCount.setup({ fatalErrors });

src/core/public/http/types.ts

@@ -102,6 +102,15 @@ export interface IBasePath {
    * See {@link BasePath.get} for getting the basePath value for a specific request
    */
   readonly serverBasePath: string;
+
+  /**
+   * The server's publicly exposed base URL, if configured. Includes protocol, host, port (optional) and the
+   * {@link IBasePath.serverBasePath}.
+   *
+   * @remarks
+   * Should be used for generating external URL links back to this Kibana instance.
+   */
+  readonly publicBaseUrl?: string;
 }
 
 /**

src/core/public/injected_metadata/injected_metadata_service.mock.ts

@@ -23,6 +23,7 @@ const createSetupContractMock = () => {
   const setupContract: jest.Mocked<InjectedMetadataSetup> = {
     getBasePath: jest.fn(),
     getServerBasePath: jest.fn(),
+    getPublicBaseUrl: jest.fn(),
     getKibanaVersion: jest.fn(),
     getKibanaBranch: jest.fn(),
     getCspConfig: jest.fn(),

src/core/public/injected_metadata/injected_metadata_service.ts

@@ -44,6 +44,7 @@ export interface InjectedMetadataParams {
     branch: string;
     basePath: string;
     serverBasePath: string;
+    publicBaseUrl: string;
     category?: AppCategory;
     csp: {
       warnLegacyBrowsers: boolean;
@@ -95,6 +96,10 @@ export class InjectedMetadataService {
         return this.state.serverBasePath;
       },
 
+      getPublicBaseUrl: () => {
+        return this.state.publicBaseUrl;
+      },
+
       getAnonymousStatusPage: () => {
         return this.state.anonymousStatusPage;
       },
@@ -142,6 +147,7 @@ export class InjectedMetadataService {
 export interface InjectedMetadataSetup {
   getBasePath: () => string;
   getServerBasePath: () => string;
+  getPublicBaseUrl: () => string;
   getKibanaBuildNumber: () => number;
   getKibanaBranch: () => string;
   getKibanaVersion: () => string;

src/core/public/public.api.md

@@ -760,6 +760,7 @@ export interface IAnonymousPaths {
 export interface IBasePath {
     get: () => string;
     prepend: (url: string) => string;
+    readonly publicBaseUrl?: string;
     remove: (url: string) => string;
     // Warning: (ae-unresolved-link) The @link reference could not be resolved: The package "kibana" does not have an export "BasePath"
     readonly serverBasePath: string;

src/core/server/http/__snapshots__/http_config.test.ts.snap

@@ -24,6 +24,14 @@ Object {
 }
 `;
 
+exports[`basePath throws if appends a slash 1`] = `"[basePath]: must start with a slash, don't end with one"`;
+
+exports[`basePath throws if is an empty string 1`] = `"[basePath]: must start with a slash, don't end with one"`;
+
+exports[`basePath throws if missing prepended slash 1`] = `"[basePath]: must start with a slash, don't end with one"`;
+
+exports[`basePath throws if not specified, but rewriteBasePath is set 1`] = `"cannot use [rewriteBasePath] when [basePath] is not specified"`;
+
 exports[`has defaults for config 1`] = `
 Object {
   "autoListen": true,
@@ -89,14 +97,6 @@ Object {
 }
 `;
 
-exports[`throws if basepath appends a slash 1`] = `"[basePath]: must start with a slash, don't end with one"`;
-
-exports[`throws if basepath is an empty string 1`] = `"[basePath]: must start with a slash, don't end with one"`;
-
-exports[`throws if basepath is missing prepended slash 1`] = `"[basePath]: must start with a slash, don't end with one"`;
-
-exports[`throws if basepath is not specified, but rewriteBasePath is set 1`] = `"cannot use [rewriteBasePath] when [basePath] is not specified"`;
-
 exports[`throws if invalid hostname 1`] = `"[host]: value must be a valid hostname (see RFC 1123)."`;
 
 exports[`with TLS throws if TLS is enabled but \`redirectHttpFromPort\` is equal to \`port\` 1`] = `"Kibana does not accept http traffic to [port] when ssl is enabled (only https is allowed), so [ssl.redirectHttpFromPort] cannot be configured to the same value. Both are [1234]."`;

src/core/server/http/base_path_service.test.ts

@@ -34,6 +34,18 @@ describe('BasePath', () => {
     });
   });
 
+  describe('publicBaseUrl', () => {
+    it('defaults to an undefined', () => {
+      const basePath = new BasePath();
+      expect(basePath.publicBaseUrl).toBe(undefined);
+    });
+
+    it('returns the publicBaseUrl', () => {
+      const basePath = new BasePath('/server', 'http://myhost.com/server');
+      expect(basePath.publicBaseUrl).toBe('http://myhost.com/server');
+    });
+  });
+
   describe('#get()', () => {
     it('returns base path associated with an incoming Legacy.Request request', () => {
       const request = httpServerMock.createRawRequest();

src/core/server/http/base_path_service.ts

@@ -34,10 +34,19 @@ export class BasePath {
    * See {@link BasePath.get} for getting the basePath value for a specific request
    */
   public readonly serverBasePath: string;
+  /**
+   * The server's publicly exposed base URL, if configured. Includes protocol, host, port (optional) and the
+   * {@link BasePath.serverBasePath}.
+   *
+   * @remarks
+   * Should be used for generating external URL links back to this Kibana instance.
+   */
+  public readonly publicBaseUrl?: string;
 
   /** @internal */
-  constructor(serverBasePath: string = '') {
+  constructor(serverBasePath: string = '', publicBaseUrl?: string) {
     this.serverBasePath = serverBasePath;
+    this.publicBaseUrl = publicBaseUrl;
   }
 
   /**

src/core/server/http/http_config.test.ts

@@ -119,36 +119,104 @@ test('can specify max payload as string', () => {
   expect(configValue.maxPayload.getValueInBytes()).toBe(2 * 1024 * 1024);
 });
 
-test('throws if basepath is missing prepended slash', () => {
+describe('basePath', () => {
-  const httpSchema = config.schema;
+  test('throws if missing prepended slash', () => {
-  const obj = {
+    const httpSchema = config.schema;
-    basePath: 'foo',
+    const obj = {
-  };
+      basePath: 'foo',
-  expect(() => httpSchema.validate(obj)).toThrowErrorMatchingSnapshot();
+    };
+    expect(() => httpSchema.validate(obj)).toThrowErrorMatchingSnapshot();
+  });
+
+  test('throws if appends a slash', () => {
+    const httpSchema = config.schema;
+    const obj = {
+      basePath: '/foo/',
+    };
+    expect(() => httpSchema.validate(obj)).toThrowErrorMatchingSnapshot();
+  });
+
+  test('throws if is an empty string', () => {
+    const httpSchema = config.schema;
+    const obj = {
+      basePath: '',
+    };
+    expect(() => httpSchema.validate(obj)).toThrowErrorMatchingSnapshot();
+  });
+
+  test('throws if not specified, but rewriteBasePath is set', () => {
+    const httpSchema = config.schema;
+    const obj = {
+      rewriteBasePath: true,
+    };
+    expect(() => httpSchema.validate(obj)).toThrowErrorMatchingSnapshot();
+  });
 });
 
-test('throws if basepath appends a slash', () => {
+describe('publicBaseUrl', () => {
-  const httpSchema = config.schema;
+  test('throws if invalid HTTP(S) URL', () => {
-  const obj = {
+    const httpSchema = config.schema;
-    basePath: '/foo/',
+    expect(() =>
-  };
+      httpSchema.validate({ publicBaseUrl: 'myhost.com' })
-  expect(() => httpSchema.validate(obj)).toThrowErrorMatchingSnapshot();
+    ).toThrowErrorMatchingInlineSnapshot(
-});
+      `"[publicBaseUrl]: expected URI with scheme [http|https]."`
+    );
+    expect(() =>
+      httpSchema.validate({ publicBaseUrl: '//myhost.com' })
+    ).toThrowErrorMatchingInlineSnapshot(
+      `"[publicBaseUrl]: expected URI with scheme [http|https]."`
+    );
+    expect(() =>
+      httpSchema.validate({ publicBaseUrl: 'ftp://myhost.com' })
+    ).toThrowErrorMatchingInlineSnapshot(
+      `"[publicBaseUrl]: expected URI with scheme [http|https]."`
+    );
+  });
 
-test('throws if basepath is an empty string', () => {
+  test('throws if includes hash, query, or auth', () => {
-  const httpSchema = config.schema;
+    const httpSchema = config.schema;
-  const obj = {
+    expect(() =>
-    basePath: '',
+      httpSchema.validate({ publicBaseUrl: 'http://myhost.com/?a=b' })
-  };
+    ).toThrowErrorMatchingInlineSnapshot(
-  expect(() => httpSchema.validate(obj)).toThrowErrorMatchingSnapshot();
+      `"[publicBaseUrl] may only contain a protocol, host, port, and pathname"`
-});
+    );
+    expect(() =>
+      httpSchema.validate({ publicBaseUrl: 'http://myhost.com/#a' })
+    ).toThrowErrorMatchingInlineSnapshot(
+      `"[publicBaseUrl] may only contain a protocol, host, port, and pathname"`
+    );
+    expect(() =>
+      httpSchema.validate({ publicBaseUrl: 'http://user:pass@myhost.com' })
+    ).toThrowErrorMatchingInlineSnapshot(
+      `"[publicBaseUrl] may only contain a protocol, host, port, and pathname"`
+    );
+  });
 
-test('throws if basepath is not specified, but rewriteBasePath is set', () => {
+  test('throws if basePath and publicBaseUrl are specified, but do not match', () => {
-  const httpSchema = config.schema;
+    const httpSchema = config.schema;
-  const obj = {
+    expect(() =>
-    rewriteBasePath: true,
+      httpSchema.validate({
-  };
+        basePath: '/foo',
-  expect(() => httpSchema.validate(obj)).toThrowErrorMatchingSnapshot();
+        publicBaseUrl: 'https://myhost.com/',
+      })
+    ).toThrowErrorMatchingInlineSnapshot(
+      `"[publicBaseUrl] must contain the [basePath]: / !== /foo"`
+    );
+  });
+
+  test('does not throw if valid URL and matches basePath', () => {
+    const httpSchema = config.schema;
+    expect(() => httpSchema.validate({ publicBaseUrl: 'http://myhost.com' })).not.toThrow();
+    expect(() => httpSchema.validate({ publicBaseUrl: 'http://myhost.com/' })).not.toThrow();
+    expect(() => httpSchema.validate({ publicBaseUrl: 'https://myhost.com' })).not.toThrow();
+    expect(() =>
+      httpSchema.validate({ publicBaseUrl: 'https://myhost.com/foo', basePath: '/foo' })
+    ).not.toThrow();
+    expect(() => httpSchema.validate({ publicBaseUrl: 'http://myhost.com:8080' })).not.toThrow();
+    expect(() =>
+      httpSchema.validate({ publicBaseUrl: 'http://myhost.com:4/foo', basePath: '/foo' })
+    ).not.toThrow();
+  });
 });
 
 test('accepts only valid uuids for server.uuid', () => {

src/core/server/http/http_config.ts

@@ -19,6 +19,7 @@
 
 import { ByteSizeValue, schema, TypeOf } from '@kbn/config-schema';
 import { hostname } from 'os';
+import url from 'url';
 
 import { CspConfigType, CspConfig, ICspConfig } from '../csp';
 import { SslConfig, sslSchema } from './ssl_config';
@@ -32,11 +33,12 @@ const match = (regex: RegExp, errorMsg: string) => (str: string) =>
 // before update to make sure it's in sync with validation rules in Legacy
 // https://github.com/elastic/kibana/blob/master/src/legacy/server/config/schema.js
 export const config = {
-  path: 'server',
+  path: 'server' as const,
   schema: schema.object(
     {
       name: schema.string({ defaultValue: () => hostname() }),
       autoListen: schema.boolean({ defaultValue: true }),
+      publicBaseUrl: schema.maybe(schema.uri({ scheme: ['http', 'https'] })),
       basePath: schema.maybe(
         schema.string({
           validate: match(validBasePathRegex, "must start with a slash, don't end with one"),
@@ -106,6 +108,17 @@ export const config = {
         if (!rawConfig.basePath && rawConfig.rewriteBasePath) {
           return 'cannot use [rewriteBasePath] when [basePath] is not specified';
         }
+
+        if (rawConfig.publicBaseUrl) {
+          const parsedUrl = url.parse(rawConfig.publicBaseUrl);
+          if (parsedUrl.query || parsedUrl.hash || parsedUrl.auth) {
+            return `[publicBaseUrl] may only contain a protocol, host, port, and pathname`;
+          }
+          if (parsedUrl.path !== (rawConfig.basePath ?? '/')) {
+            return `[publicBaseUrl] must contain the [basePath]: ${parsedUrl.path} !== ${rawConfig.basePath}`;
+          }
+        }
+
         if (!rawConfig.compression.enabled && rawConfig.compression.referrerWhitelist) {
           return 'cannot use [compression.referrerWhitelist] when [compression.enabled] is set to false';
         }
@@ -138,6 +151,7 @@ export class HttpConfig {
   public customResponseHeaders: Record<string, string | string[]>;
   public maxPayload: ByteSizeValue;
   public basePath?: string;
+  public publicBaseUrl?: string;
   public rewriteBasePath: boolean;
   public ssl: SslConfig;
   public compression: { enabled: boolean; referrerWhitelist?: string[] };
@@ -165,6 +179,7 @@ export class HttpConfig {
     this.maxPayload = rawHttpConfig.maxPayload;
     this.name = rawHttpConfig.name;
     this.basePath = rawHttpConfig.basePath;
+    this.publicBaseUrl = rawHttpConfig.publicBaseUrl;
     this.keepaliveTimeout = rawHttpConfig.keepaliveTimeout;
     this.socketTimeout = rawHttpConfig.socketTimeout;
     this.rewriteBasePath = rawHttpConfig.rewriteBasePath;

src/core/server/http/http_server.ts

@@ -119,7 +119,7 @@ export class HttpServer {
     await this.server.register([HapiStaticFiles]);
     this.config = config;
 
-    const basePathService = new BasePath(config.basePath);
+    const basePathService = new BasePath(config.basePath, config.publicBaseUrl);
     this.setupBasePathRewrite(config, basePathService);
     this.setupConditionalCompression(config);
     this.setupRequestStateAssignment(config);

src/core/server/http/http_service.mock.ts

@@ -60,8 +60,12 @@ export type InternalHttpServiceStartMock = jest.Mocked<InternalHttpServiceStart>
   basePath: BasePathMocked;
 };
 
-const createBasePathMock = (serverBasePath = '/mock-server-basepath'): BasePathMocked => ({
+const createBasePathMock = (
+  serverBasePath = '/mock-server-basepath',
+  publicBaseUrl = 'http://myhost.com/mock-server-basepath'
+): BasePathMocked => ({
   serverBasePath,
+  publicBaseUrl,
   get: jest.fn().mockReturnValue(serverBasePath),
   set: jest.fn(),
   prepend: jest.fn(),

src/core/server/http/types.ts

@@ -316,7 +316,12 @@ export interface InternalHttpServiceStart extends HttpServiceStart {
   isListening: () => boolean;
 }
 
-/** @public */
+/**
+ * Information about what hostname, port, and protocol the server process is
+ * running on. Note that this may not match the URL that end-users access
+ * Kibana at. For the public URL, see {@link BasePath.publicBaseUrl}.
+ * @public
+ */
 export interface HttpServerInfo {
   /** The name of the Kibana server */
   name: string;

src/core/server/rendering/__snapshots__/rendering_service.test.ts.snap

@@ -36,6 +36,7 @@ Object {
       "user": Object {},
     },
   },
+  "publicBaseUrl": "http://myhost.com/mock-server-basepath",
   "serverBasePath": "/mock-server-basepath",
   "uiPlugins": Array [],
   "vars": Object {},
@@ -79,6 +80,7 @@ Object {
       "user": Object {},
     },
   },
+  "publicBaseUrl": "http://myhost.com/mock-server-basepath",
   "serverBasePath": "/mock-server-basepath",
   "uiPlugins": Array [],
   "vars": Object {},
@@ -126,6 +128,7 @@ Object {
       },
     },
   },
+  "publicBaseUrl": "http://myhost.com/mock-server-basepath",
   "serverBasePath": "/mock-server-basepath",
   "uiPlugins": Array [],
   "vars": Object {},
@@ -169,6 +172,7 @@ Object {
       "user": Object {},
     },
   },
+  "publicBaseUrl": "http://myhost.com/mock-server-basepath",
   "serverBasePath": "/mock-server-basepath",
   "uiPlugins": Array [],
   "vars": Object {},
@@ -212,6 +216,7 @@ Object {
       "user": Object {},
     },
   },
+  "publicBaseUrl": "http://myhost.com/mock-server-basepath",
   "serverBasePath": "/mock-server-basepath",
   "uiPlugins": Array [],
   "vars": Object {},

src/core/server/rendering/rendering_service.tsx

@@ -52,7 +52,7 @@ export class RenderingService {
           packageInfo: this.coreContext.env.packageInfo,
         };
         const basePath = http.basePath.get(request);
-        const serverBasePath = http.basePath.serverBasePath;
+        const { serverBasePath, publicBaseUrl } = http.basePath;
         const settings = {
           defaults: uiSettings.getRegistered(),
           user: includeUserSettings ? await uiSettings.getUserProvided() : {},
@@ -72,6 +72,7 @@ export class RenderingService {
             branch: env.packageInfo.branch,
             basePath,
             serverBasePath,
+            publicBaseUrl,
             env,
             anonymousStatusPage: status.isStatusPageAnonymous(),
             i18n: {

src/core/server/rendering/types.ts

@@ -40,6 +40,7 @@ export interface RenderingMetadata {
     branch: string;
     basePath: string;
     serverBasePath: string;
+    publicBaseUrl?: string;
     env: {
       mode: EnvironmentMode;
       packageInfo: PackageInfo;

src/core/server/server.api.md

@@ -269,9 +269,10 @@ export interface AuthToolkit {
 // @public
 export class BasePath {
     // @internal
-    constructor(serverBasePath?: string);
+    constructor(serverBasePath?: string, publicBaseUrl?: string);
     get: (request: KibanaRequest | LegacyRequest) => string;
     prepend: (path: string) => string;
+    readonly publicBaseUrl?: string;
     remove: (path: string) => string;
     readonly serverBasePath: string;
     set: (request: KibanaRequest | LegacyRequest, requestSpecificBasePath: string) => void;
@@ -862,7 +863,7 @@ export interface HttpResponseOptions {
 // @public
 export type HttpResponsePayload = undefined | string | Record<string, any> | Buffer | Stream;
 
-// @public (undocumented)
+// @public
 export interface HttpServerInfo {
     hostname: string;
     name: string;

src/legacy/server/config/schema.js

@@ -69,6 +69,7 @@ export default () =>
       customResponseHeaders: HANDLED_IN_NEW_PLATFORM,
       keepaliveTimeout: HANDLED_IN_NEW_PLATFORM,
       maxPayloadBytes: HANDLED_IN_NEW_PLATFORM,
+      publicBaseUrl: HANDLED_IN_NEW_PLATFORM,
       socketTimeout: HANDLED_IN_NEW_PLATFORM,
       ssl: HANDLED_IN_NEW_PLATFORM,
       compression: HANDLED_IN_NEW_PLATFORM,

src/plugins/dashboard/public/application/__snapshots__/dashboard_empty_screen.test.tsx.snap

@@ -13,6 +13,7 @@ exports[`DashboardEmptyScreen renders correctly with readonly mode 1`] = `
         "basePath": "",
         "get": [Function],
         "prepend": [Function],
+        "publicBaseUrl": undefined,
         "remove": [Function],
         "serverBasePath": "",
       },
@@ -376,6 +377,7 @@ exports[`DashboardEmptyScreen renders correctly with visualize paragraph 1`] = `
         "basePath": "",
         "get": [Function],
         "prepend": [Function],
+        "publicBaseUrl": undefined,
         "remove": [Function],
         "serverBasePath": "",
       },
@@ -747,6 +749,7 @@ exports[`DashboardEmptyScreen renders correctly without visualize paragraph 1`]
         "basePath": "",
         "get": [Function],
         "prepend": [Function],
+        "publicBaseUrl": undefined,
         "remove": [Function],
         "serverBasePath": "",
       },

src/plugins/saved_objects_management/public/management_section/objects_table/__snapshots__/saved_objects_table.test.tsx.snap

@@ -262,6 +262,7 @@ exports[`SavedObjectsTable should render normally 1`] = `
           "basePath": "",
           "get": [Function],
           "prepend": [Function],
+          "publicBaseUrl": undefined,
           "remove": [Function],
           "serverBasePath": "",
         }

src/plugins/saved_objects_management/public/management_section/objects_table/components/__snapshots__/flyout.test.tsx.snap

@@ -175,6 +175,7 @@ exports[`Flyout conflicts should allow conflict resolution 2`] = `
             "basePath": "",
             "get": [Function],
             "prepend": [Function],
+            "publicBaseUrl": undefined,
             "remove": [Function],
             "serverBasePath": "",
           },

src/plugins/telemetry_management_section/public/components/__snapshots__/telemetry_management_section.test.tsx.snap

@@ -316,6 +316,7 @@ exports[`TelemetryManagementSectionComponent renders null because allowChangingO
           "basePath": "",
           "get": [Function],
           "prepend": [Function],
+          "publicBaseUrl": undefined,
           "remove": [Function],
           "serverBasePath": "",
         },