[SLO] Add structured key/value labels to SLO definitions

Adds an optional `labels` field (Record<string, string>) to SLO
definitions so users can enrich SLOs with business context (e.g. team,
cost_center, product). Aligns with the ECS `labels` convention and the
existing Synthetics monitor `labels` field.

- Schema: new `labelsSchema`; `labels` added to the SLO definition and
  the create/update route bodies.
- Saved object: `labels` flattened mapping + model version 2
  (mappings_addition + data_backfill defaulting to `{}`).
- ES resources: `slo.labels` flattened mapping in SLI/summary component
  templates and a `set` processor in the SLI/summary ingest pipelines;
  SLO_RESOURCES_VERSION bumped to 3.7.
- UI: key/value labels editor on the SLO edit form, labels badges on the
  SLO details Definition tab, and form <-> API conversion helpers.
- Backfills `labels` to `{}` across repository decode, remote summary
  docs, and composite member decode for backward compatibility.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: shahzad31

src/core/server/integration_tests/ci_checks/saved_objects/check_registered_types.test.ts

@@ -174,7 +174,7 @@ describe('checking migration metadata changes on all registered SO types', () =>
         "siem-ui-timeline": "439d5deaa90cc74d10a13804db1b40b9c66ccadfb9c6b34b2bdfcedab8d80e41",
         "siem-ui-timeline-note": "c81b789cea05ba59973639194825838d48c571b851cd8c359c1e4aacf2c8d2c5",
         "siem-ui-timeline-pinned-event": "abd9cf88c47bd4662a898ba8f8fb736b4d3da14975f0532830b17896983bf83d",
-        "slo": "682c6d9e3ba7a489def2b824da547e26f67a16343747425a1efdf618c7fdb3e7",
+        "slo": "bc2837e33d6ab1e4dccc756aa091298ad0a3baafce65b7057c6b1dea7d232442",
         "slo-composite": "a3b2a8829b62bd23e2e711324a3b6b365d888ccb00929ce3b1e0f8e023c064e4",
         "slo-settings": "eaee24c76b1c02ba4ae1bf3742c1f5eca942a1662978f3420ec1b7f951746a32",
         "slo_template": "7c3298ec68d2104642a0ea3c320d961c90e51216327a6491a88c2688906e24bd",
@@ -1245,8 +1245,9 @@ describe('checking migration metadata changes on all registered SO types', () =>
         "siem-ui-timeline-pinned-event|7.16.0: 91da406ec7758e5787f971ac10d62d7006d5cde5",
         "==============================================================================",
         "slo|global: 3bb1282c625b0cbdaf1317157a973f0eb263b13d",
-        "slo|mappings: 98c4bcb86ae664a5d21cd03fd7df79068b378caa",
+        "slo|mappings: bdd3ded97d616a91774629398f893f0ccbe0d363",
         "slo|schemas: da39a3ee5e6b4b0d3255bfef95601890afd80709",
+        "slo|10.2.0: 75b6f88427f0fca000e7b448562f4bebfa81e46f81a297ef01ad278af2d50931",
         "slo|10.1.0: 0079a5a79a3d5a70615113b6341d1b8378ff217e1adfc5afe5e281d0ed8a9816",
         "slo|8.9.0: ea1a38eb158103aca3ad810d1282c7d0c05d27c3",
         "===================================================",
@@ -1596,7 +1597,7 @@ describe('checking migration metadata changes on all registered SO types', () =>
         "siem-ui-timeline": "10.1.0",
         "siem-ui-timeline-note": "10.0.0",
         "siem-ui-timeline-pinned-event": "10.0.0",
-        "slo": "10.1.0",
+        "slo": "10.2.0",
         "slo-composite": "10.1.0",
         "slo-settings": "10.0.0",
         "slo_template": "10.2.0",
@@ -1769,7 +1770,7 @@ describe('checking migration metadata changes on all registered SO types', () =>
         "siem-ui-timeline": "10.1.0",
         "siem-ui-timeline-note": "7.16.0",
         "siem-ui-timeline-pinned-event": "7.16.0",
-        "slo": "10.1.0",
+        "slo": "10.2.0",
         "slo-composite": "10.1.0",
         "slo-settings": "10.0.0",
         "slo_template": "10.2.0",

x-pack/platform/packages/shared/kbn-slo-schema/src/rest_specs/routes/create.ts

@@ -9,6 +9,7 @@ import { indicatorSchema, timeWindowSchema } from '../../schema';
 import { allOrAnyStringOrArray } from '../../schema/common';
 import {
   budgetingMethodSchema,
+  labelsSchema,
   objectiveSchema,
   optionalSettingsSchema,
   sloIdSchema,
@@ -29,6 +30,7 @@ const createSLOParamsSchema = t.type({
       id: sloIdSchema,
       settings: optionalSettingsSchema,
       tags: tagsSchema,
+      labels: labelsSchema,
       groupBy: allOrAnyStringOrArray,
       revision: t.number,
       artifacts: t.partial({

x-pack/platform/packages/shared/kbn-slo-schema/src/rest_specs/routes/update.ts

@@ -9,6 +9,7 @@ import { indicatorSchema, timeWindowSchema } from '../../schema';
 import { allOrAnyStringOrArray } from '../../schema/common';
 import {
   budgetingMethodSchema,
+  labelsSchema,
   objectiveSchema,
   optionalSettingsSchema,
   sloDefinitionSchema,
@@ -29,6 +30,7 @@ const updateSLOParamsSchema = t.type({
     objective: objectiveSchema,
     settings: optionalSettingsSchema,
     tags: tagsSchema,
+    labels: labelsSchema,
     groupBy: allOrAnyStringOrArray,
     artifacts: t.partial({
       dashboards: t.array(t.type({ id: t.string })),

x-pack/platform/packages/shared/kbn-slo-schema/src/schema/slo.ts

@@ -47,6 +47,10 @@ const optionalSettingsSchema = t.partial({
 
 const tagsSchema = t.array(t.string);
 
+// Structured key/value labels to enrich SLO definitions with business context
+// (e.g. team, cost_center, product). Stored as a flattened field in Elasticsearch.
+const labelsSchema = t.record(t.string, t.string);
+
 // id cannot contain special characters and spaces
 const sloIdSchema = new t.Type<string, string, unknown>(
   'sloIdSchema',
@@ -89,6 +93,7 @@ const requiredSloFields = t.type({
   revision: t.number,
   enabled: t.boolean,
   tags: tagsSchema,
+  labels: labelsSchema,
   createdAt: dateType,
   updatedAt: dateType,
   groupBy: groupBySchema,
@@ -115,6 +120,7 @@ export {
   budgetingMethodSchema,
   dashboardsWithIdSchema,
   groupBySchema,
+  labelsSchema,
   objectiveSchema,
   occurrencesBudgetingMethodSchema,
   optionalSettingsSchema,

x-pack/solutions/observability/plugins/slo/common/constants.ts

@@ -56,7 +56,7 @@ export const SUPPRESSED_PRIORITY_ACTION = {
 export const LOCK_ID_RESOURCE_INSTALLER = 'slo:resource_installer';
 
 export const SLO_MODEL_VERSION = 2;
-export const SLO_RESOURCES_VERSION = 3.6;
+export const SLO_RESOURCES_VERSION = 3.7;
 export const SLO_RESOURCES_VERSION_MAJOR = 3;
 
 export const SLI_COMPONENT_TEMPLATE_MAPPINGS_NAME = `.slo-observability.sli-mappings-v${SLO_RESOURCES_VERSION}`;

x-pack/solutions/observability/plugins/slo/public/data/slo/slo.ts

@@ -76,6 +76,7 @@ export const baseSlo: Omit<SLOWithSummaryResponse, 'id'> = {
   groupings: {},
   instanceId: ALL_VALUE,
   tags: ['k8s', 'production', 'critical'],
+  labels: { team: 'platform', cost_center: 'engineering' },
   enabled: true,
   createdAt: now,
   updatedAt: now,

x-pack/solutions/observability/plugins/slo/public/locators/slo_edit.test.ts

@@ -25,7 +25,7 @@ describe('SloEditLocator', () => {
   it('returns the correct url when partial slo input is provided', async () => {
     const location = await locator.getLocation(buildSlo({ id: undefined }));
     expect(location.path).toEqual(
-      "/create?_a=(budgetingMethod:occurrences,createdAt:'2022-12-29T10:11:12.000Z',description:'some%20description%20useful',enabled:!t,groupBy:'*',groupings:(),indicator:(params:(dataViewId:some-data-view-id,filter:'baz:%20foo%20and%20bar%20%3E%202',good:'http_status:%202xx',index:some-index,timestampField:custom_timestamp,total:'a%20query'),type:sli.kql.custom),instanceId:'*',meta:(),name:'super%20important%20level%20service',objective:(target:0.98),revision:1,settings:(frequency:'1m',preventInitialBackfill:!f,syncDelay:'1m'),summary:(errorBudget:(consumed:0.064,initial:0.02,isEstimated:!f,remaining:0.936),fiveMinuteBurnRate:0,oneDayBurnRate:0,oneHourBurnRate:0,sliValue:0.99872,status:HEALTHY),tags:!(k8s,production,critical),timeWindow:(duration:'30d',type:rolling),updatedAt:'2022-12-29T10:11:12.000Z',version:2)"
+      "/create?_a=(budgetingMethod:occurrences,createdAt:'2022-12-29T10:11:12.000Z',description:'some%20description%20useful',enabled:!t,groupBy:'*',groupings:(),indicator:(params:(dataViewId:some-data-view-id,filter:'baz:%20foo%20and%20bar%20%3E%202',good:'http_status:%202xx',index:some-index,timestampField:custom_timestamp,total:'a%20query'),type:sli.kql.custom),instanceId:'*',labels:(cost_center:engineering,team:platform),meta:(),name:'super%20important%20level%20service',objective:(target:0.98),revision:1,settings:(frequency:'1m',preventInitialBackfill:!f,syncDelay:'1m'),summary:(errorBudget:(consumed:0.064,initial:0.02,isEstimated:!f,remaining:0.936),fiveMinuteBurnRate:0,oneDayBurnRate:0,oneHourBurnRate:0,sliValue:0.99872,status:HEALTHY),tags:!(k8s,production,critical),timeWindow:(duration:'30d',type:rolling),updatedAt:'2022-12-29T10:11:12.000Z',version:2)"
     );
   });
 });

x-pack/solutions/observability/plugins/slo/public/pages/slo_details/components/definition/settings_panel.tsx

@@ -41,6 +41,8 @@ export function SettingsPanel({ slo }: Props) {
   const { uiSettings } = useKibana().services;
   const percentFormat = uiSettings.get('format:percent:defaultPattern');
   const hasTags = slo.tags && slo.tags.length > 0;
+  const labelsEntries = Object.entries(slo.labels ?? {});
+  const hasLabels = labelsEntries.length > 0;
 
   return (
     <EuiPanel hasShadow={false} hasBorder paddingSize="l">
@@ -171,6 +173,25 @@ export function SettingsPanel({ slo }: Props) {
             </EuiDescriptionListDescription>
           </>
         )}
+
+        {hasLabels && (
+          <>
+            <EuiDescriptionListTitle>
+              {i18n.translate('xpack.slo.sloDetails.definition.labelsTitle', {
+                defaultMessage: 'Labels',
+              })}
+            </EuiDescriptionListTitle>
+            <EuiDescriptionListDescription>
+              <EuiFlexGroup gutterSize="xs" wrap responsive={false}>
+                {labelsEntries.map(([key, value]) => (
+                  <EuiFlexItem key={key} grow={false}>
+                    <EuiBadge color="hollow">{`${key}: ${value}`}</EuiBadge>
+                  </EuiFlexItem>
+                ))}
+              </EuiFlexGroup>
+            </EuiDescriptionListDescription>
+          </>
+        )}
       </EuiDescriptionList>
     </EuiPanel>
   );

x-pack/solutions/observability/plugins/slo/public/pages/slo_edit/components/slo_edit_form_description_section.tsx

@@ -22,6 +22,7 @@ import { useKibana } from '../../../hooks/use_kibana';
 import { useFetchSLOSuggestions } from '../hooks/use_fetch_suggestions';
 import type { CreateSLOForm } from '../types';
 import { OptionalText } from './common/optional_text';
+import { SloEditFormLabelsField } from './slo_edit_form_labels_field';
 import { MAX_WIDTH } from '../constants';
 
 export function SloEditFormDescriptionSection() {
@@ -151,6 +152,7 @@ export function SloEditFormDescriptionSection() {
           )}
         />
       </EuiFormRow>
+      <SloEditFormLabelsField />
       <EuiFormRow
         fullWidth
         label={i18n.translate('xpack.slo.sloEdit.dashboards.label', {

x-pack/solutions/observability/plugins/slo/public/pages/slo_edit/components/slo_edit_form_labels_field.tsx

@@ -0,0 +1,116 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import {
+  EuiButtonEmpty,
+  EuiButtonIcon,
+  EuiFieldText,
+  EuiFlexGroup,
+  EuiFlexItem,
+  EuiFormRow,
+  EuiSpacer,
+} from '@elastic/eui';
+import { i18n } from '@kbn/i18n';
+import React from 'react';
+import { Controller, useFieldArray, useFormContext } from 'react-hook-form';
+import type { CreateSLOForm } from '../types';
+import { OptionalText } from './common/optional_text';
+
+export function SloEditFormLabelsField() {
+  const { control } = useFormContext<CreateSLOForm>();
+  const { fields, append, remove } = useFieldArray({ control, name: 'labels' });
+
+  return (
+    <EuiFormRow
+      fullWidth
+      label={i18n.translate('xpack.slo.sloEdit.labels.label', {
+        defaultMessage: 'Labels',
+      })}
+      labelAppend={<OptionalText />}
+      helpText={i18n.translate('xpack.slo.sloEdit.labels.helpText', {
+        defaultMessage:
+          'Add structured key/value pairs to enrich this SLO with business context (e.g. team, cost_center).',
+      })}
+    >
+      <div>
+        {fields.map((field, index) => (
+          <React.Fragment key={field.id}>
+            <EuiFlexGroup gutterSize="s" alignItems="flexStart" responsive={false}>
+              <EuiFlexItem>
+                <Controller
+                  name={`labels.${index}.key`}
+                  control={control}
+                  defaultValue={field.key}
+                  rules={{ required: true }}
+                  render={({ field: { ref, ...keyField }, fieldState }) => (
+                    <EuiFieldText
+                      {...keyField}
+                      fullWidth
+                      isInvalid={fieldState.invalid}
+                      data-test-subj={`sloEditLabelsKeyInput${index}`}
+                      aria-label={i18n.translate('xpack.slo.sloEdit.labels.keyAriaLabel', {
+                        defaultMessage: 'Label key',
+                      })}
+                      placeholder={i18n.translate('xpack.slo.sloEdit.labels.keyPlaceholder', {
+                        defaultMessage: 'Key',
+                      })}
+                    />
+                  )}
+                />
+              </EuiFlexItem>
+              <EuiFlexItem>
+                <Controller
+                  name={`labels.${index}.value`}
+                  control={control}
+                  defaultValue={field.value}
+                  render={({ field: { ref, ...valueField } }) => (
+                    <EuiFieldText
+                      {...valueField}
+                      fullWidth
+                      data-test-subj={`sloEditLabelsValueInput${index}`}
+                      aria-label={i18n.translate('xpack.slo.sloEdit.labels.valueAriaLabel', {
+                        defaultMessage: 'Label value',
+                      })}
+                      placeholder={i18n.translate('xpack.slo.sloEdit.labels.valuePlaceholder', {
+                        defaultMessage: 'Value',
+                      })}
+                    />
+                  )}
+                />
+              </EuiFlexItem>
+              <EuiFlexItem grow={false}>
+                <EuiButtonIcon
+                  iconType="trash"
+                  color="danger"
+                  display="base"
+                  size="m"
+                  data-test-subj={`sloEditLabelsRemoveButton${index}`}
+                  aria-label={i18n.translate('xpack.slo.sloEdit.labels.removeAriaLabel', {
+                    defaultMessage: 'Remove label entry',
+                  })}
+                  onClick={() => remove(index)}
+                />
+              </EuiFlexItem>
+            </EuiFlexGroup>
+            <EuiSpacer size="xs" />
+          </React.Fragment>
+        ))}
+        <EuiButtonEmpty
+          iconType="plusInCircle"
+          size="s"
+          flush="left"
+          data-test-subj="sloEditLabelsAddButton"
+          onClick={() => append({ key: '', value: '' })}
+        >
+          {i18n.translate('xpack.slo.sloEdit.labels.addButtonLabel', {
+            defaultMessage: 'Add label',
+          })}
+        </EuiButtonEmpty>
+      </div>
+    </EuiFormRow>
+  );
+}