[Fleet] Use streaming for package install instead of an assetsMap with everything loaded in memory

x-pack/platform/plugins/shared/fleet/common/types/models/epm.ts

@@ -132,17 +132,15 @@ export interface ArchiveEntry {
 }
 
 export interface ArchiveIterator {
-  traverseEntries: (onEntry: (entry: ArchiveEntry) => Promise<void>) => Promise<void>;
+  traverseEntries: (
+    onEntry: (entry: ArchiveEntry) => Promise<void>,
+    readBuffer?: (path: string) => boolean
+  ) => Promise<void>;
   getPaths: () => Promise<string[]>;
 }
 
 export interface PackageInstallContext {
   packageInfo: InstallablePackage;
-  /**
-   * @deprecated Use `archiveIterator` to access the package archive entries
-   * without loading them all into memory at once.
-   */
-  assetsMap: AssetsMap;
   paths: string[];
   archiveIterator: ArchiveIterator;
 }

x-pack/platform/plugins/shared/fleet/server/routes/epm/kibana_assets_handler.ts

@@ -68,7 +68,6 @@ export const installPackageKibanaAssetsHandler: FleetRequestHandler<
     packageInstallContext: {
       packageInfo,
       paths: installedPkgWithAssets.paths,
-      assetsMap: installedPkgWithAssets.assetsMap,
       archiveIterator: createArchiveIteratorFromMap(installedPkgWithAssets.assetsMap),
     },
   });

x-pack/platform/plugins/shared/fleet/server/services/epm/archive/archive_iterator.ts

@@ -74,10 +74,15 @@ export const createArchiveIterator = (
  */
 export const createArchiveIteratorFromMap = (assetsMap: AssetsMap): ArchiveIterator => {
   const traverseEntries = async (
-    onEntry: (entry: ArchiveEntry) => Promise<void>
+    onEntry: (entry: ArchiveEntry) => Promise<void>,
+    readBuffer?: (path: string) => boolean
   ): Promise<void> => {
     for (const [path, buffer] of assetsMap) {
-      await onEntry({ path, buffer });
+      if (readBuffer && !readBuffer(path)) {
+        await onEntry({ path });
+      } else {
+        await onEntry({ path, buffer });
+      }
     }
   };
 

x-pack/platform/plugins/shared/fleet/server/services/epm/elasticsearch/datastream_ilm/install.ts

@@ -12,7 +12,11 @@ import {
   ElasticsearchAssetType,
   type PackageInstallContext,
 } from '../../../../../common/types/models';
-import type { EsAssetReference, RegistryDataStream } from '../../../../../common/types/models';
+import type {
+  AssetsMap,
+  EsAssetReference,
+  RegistryDataStream,
+} from '../../../../../common/types/models';
 import { updateEsAssetReferences } from '../../packages/es_assets_reference';
 import { getAssetFromAssetsMap } from '../../archive';
 
@@ -40,7 +44,7 @@ export const installIlmForDataStream = async (
   logger: Logger,
   esReferences: EsAssetReference[]
 ) => {
-  const { packageInfo: registryPackage, paths, assetsMap } = packageInstallContext;
+  const { packageInfo: registryPackage, paths } = packageInstallContext;
   const previousInstalledIlmEsAssets = esReferences.filter(
     ({ type }) => type === ElasticsearchAssetType.dataStreamIlmPolicy
   );
@@ -72,6 +76,19 @@ export const installIlmForDataStream = async (
     };
 
   const dataStreamIlmPaths = paths.filter((path) => isDataStreamIlm(path));
+
+  const dataStreamIlmAssetsMap: AssetsMap = new Map();
+  await packageInstallContext.archiveIterator.traverseEntries(
+    async (entry) => {
+      if (!entry.buffer) {
+        return;
+      }
+
+      dataStreamIlmAssetsMap.set(entry.path, entry.buffer);
+    },
+    (path) => dataStreamIlmPaths.includes(path)
+  );
+
   let installedIlms: EsAssetReference[] = [];
   if (dataStreamIlmPaths.length > 0) {
     const ilmPathDatasets = dataStreams.reduce<IlmPathDataset[]>((acc, dataStream) => {
@@ -103,7 +120,7 @@ export const installIlmForDataStream = async (
     const ilmInstallations: IlmInstallation[] = ilmPathDatasets.map(
       (ilmPathDataset: IlmPathDataset) => {
         const content = JSON.parse(
-          getAssetFromAssetsMap(assetsMap, ilmPathDataset.path).toString('utf-8')
+          getAssetFromAssetsMap(dataStreamIlmAssetsMap, ilmPathDataset.path).toString('utf-8')
         );
         content.policy._meta = getESAssetMetadata({ packageName: registryPackage.name });
 

x-pack/platform/plugins/shared/fleet/server/services/epm/elasticsearch/ilm/install.ts

@@ -16,7 +16,7 @@ import { updateEsAssetReferences } from '../../packages/es_assets_reference';
 import { getESAssetMetadata } from '../meta';
 import { retryTransientEsErrors } from '../retry';
 import { PackageInvalidArchiveError } from '../../../../errors';
-import type { PackageInstallContext } from '../../../../../common/types';
+import type { AssetsMap, PackageInstallContext } from '../../../../../common/types';
 import { MAX_CONCURRENT_ILM_POLICIES_OPERATIONS } from '../../../../constants';
 
 export async function installILMPolicy(
@@ -30,10 +30,20 @@ export async function installILMPolicy(
   const ilmPaths = packageInstallContext.paths.filter((path) => isILMPolicy(path));
   if (!ilmPaths.length) return esReferences;
 
+  const ilmAssetsMap: AssetsMap = new Map();
+  await packageInstallContext.archiveIterator.traverseEntries(
+    async (entry) => {
+      if (!entry.buffer) {
+        return;
+      }
+
+      ilmAssetsMap.set(entry.path, entry.buffer);
+    },
+    (path) => ilmPaths.includes(path)
+  );
+
   const ilmPolicies = ilmPaths.map((path) => {
-    const body = JSON.parse(
-      getAssetFromAssetsMap(packageInstallContext.assetsMap, path).toString('utf-8')
-    );
+    const body = JSON.parse(getAssetFromAssetsMap(ilmAssetsMap, path).toString('utf-8'));
 
     body.policy._meta = getESAssetMetadata({ packageName: packageInfo.name });
 

x-pack/platform/plugins/shared/fleet/server/services/epm/elasticsearch/ingest_pipeline/install.test.ts

@@ -7,6 +7,8 @@
 import { elasticsearchClientMock } from '@kbn/core-elasticsearch-client-server-mocks';
 import { loggerMock } from '@kbn/logging-mocks';
 
+import { createArchiveIteratorFromMap } from '../../archive/archive_iterator';
+
 import { prepareToInstallPipelines } from './install';
 
 jest.mock('../../archive/cache');
@@ -25,10 +27,10 @@ describe('Install pipeline tests', () => {
               path: '/datasettest',
             },
           ],
-        },
+        } as any,
         paths: [],
-        assetsMap: new Map(),
-      } as any);
+        archiveIterator: createArchiveIteratorFromMap(new Map()),
+      });
 
       expect(res.assetsToAdd).toEqual([{ id: 'logs-datasettest-1.0.0', type: 'ingest_pipeline' }]);
       const esClient = elasticsearchClientMock.createInternalClient();
@@ -64,16 +66,18 @@ describe('Install pipeline tests', () => {
           'packagetest-1.0.0/data_stream/datasettest/elasticsearch/ingest_pipeline/default.yml',
           'packagetest-1.0.0/data_stream/datasettest/elasticsearch/ingest_pipeline/standard.yml',
         ],
-        assetsMap: new Map([
-          [
-            'packagetest-1.0.0/data_stream/datasettest/elasticsearch/ingest_pipeline/default.yml',
-            Buffer.from('description: test'),
-          ],
-          [
-            'packagetest-1.0.0/data_stream/datasettest/elasticsearch/ingest_pipeline/standard.yml',
-            Buffer.from('description: test'),
-          ],
-        ]),
+        archiveIterator: createArchiveIteratorFromMap(
+          new Map([
+            [
+              'packagetest-1.0.0/data_stream/datasettest/elasticsearch/ingest_pipeline/default.yml',
+              Buffer.from('description: test'),
+            ],
+            [
+              'packagetest-1.0.0/data_stream/datasettest/elasticsearch/ingest_pipeline/standard.yml',
+              Buffer.from('description: test'),
+            ],
+          ])
+        ),
       } as any);
       expect(res.assetsToAdd).toEqual([
         { id: 'logs-datasettest-1.0.0', type: 'ingest_pipeline' },

x-pack/platform/plugins/shared/fleet/server/services/epm/elasticsearch/ingest_pipeline/install.ts

@@ -25,7 +25,7 @@ import {
   FLEET_EVENT_INGESTED_PIPELINE_CONTENT,
 } from '../../../../constants';
 import { getPipelineNameForDatastream } from '../../../../../common/services';
-import type { ArchiveEntry, PackageInstallContext } from '../../../../../common/types';
+import type { ArchiveEntry, AssetsMap, PackageInstallContext } from '../../../../../common/types';
 
 import { appendMetadataToIngestPipeline } from '../meta';
 import { retryTransientEsErrors } from '../retry';
@@ -157,6 +157,19 @@ export async function installAllPipelines({
   > = [];
   const substitutions: RewriteSubstitution[] = [];
 
+  const pipelineAssetsMap: AssetsMap = new Map();
+
+  await packageInstallContext.archiveIterator.traverseEntries(
+    async (entry) => {
+      if (!entry.buffer) {
+        return;
+      }
+
+      pipelineAssetsMap.set(entry.path, entry.buffer);
+    },
+    (path) => pipelinePaths.includes(path)
+  );
+
   let datastreamPipelineCreated = false;
   pipelinePaths.forEach((path) => {
     const { name, extension } = getNameAndExtension(path);
@@ -169,7 +182,7 @@ export async function installAllPipelines({
       dataStream,
       packageVersion: packageInstallContext.packageInfo.version,
     });
-    const content = getAssetFromAssetsMap(packageInstallContext.assetsMap, path).toString('utf-8');
+    const content = getAssetFromAssetsMap(pipelineAssetsMap, path).toString('utf-8');
     pipelinesInfos.push({
       nameForInstallation,
       shouldInstallCustomPipelines: dataStream && isMainPipeline,

x-pack/platform/plugins/shared/fleet/server/services/epm/elasticsearch/ml_model/install.ts

@@ -13,7 +13,7 @@ import {
   ElasticsearchAssetType,
   type PackageInstallContext,
 } from '../../../../../common/types/models';
-import type { EsAssetReference } from '../../../../../common/types/models';
+import type { AssetsMap, EsAssetReference } from '../../../../../common/types/models';
 
 import { retryTransientEsErrors } from '../retry';
 
@@ -34,9 +34,19 @@ export const installMlModel = async (
   const mlModelPath = packageInstallContext.paths.find((path) => isMlModel(path));
 
   if (mlModelPath !== undefined) {
-    const content = getAssetFromAssetsMap(packageInstallContext.assetsMap, mlModelPath).toString(
-      'utf-8'
+    const mlModelAssetsMap: AssetsMap = new Map();
+    await packageInstallContext.archiveIterator.traverseEntries(
+      async (entry) => {
+        if (!entry.buffer) {
+          return;
+        }
+
+        mlModelAssetsMap.set(entry.path, entry.buffer);
+      },
+      (path) => path === mlModelPath
     );
+
+    const content = getAssetFromAssetsMap(mlModelAssetsMap, mlModelPath).toString('utf-8');
     const pathParts = mlModelPath.split('/');
     const modelId = pathParts[pathParts.length - 1].replace('.json', '');