Tempo: Add Victoria Logs support for "traces to logs" (#105985)

* feat(trace-to-logs): add VictoriaLogs datasource support

Signed-off-by: Yury Molodov <yurymolodov@gmail.com>

* tempo: fix lint errors in createSpanLink.tsx

Signed-off-by: Yury Molodov <yurymolodov@gmail.com>

---------

Signed-off-by: Yury Molodov <yurymolodov@gmail.com>

packages/grafana-o11y-ds-frontend/src/TraceToLogs/TraceToLogsSettings.tsx

@@ -80,6 +80,7 @@ export function TraceToLogsSettings({ options, onOptionsChange }: Props) {
     'grafana-opensearch-datasource', // external
     'grafana-falconlogscale-datasource', // external
     'googlecloud-logging-datasource', // external
+    'victoriametrics-logs-datasource', // external
   ];
 
   const traceToLogs = useMemo(

public/app/features/explore/TraceView/createSpanLink.test.ts

@@ -1515,6 +1515,91 @@ describe('createSpanLinkFactory', () => {
       expect(decodeURIComponent(links![0].href)).toContain('spanName=\\"operation\\"');
     });
   });
+
+  describe('should return victorialogs link', () => {
+    const victoriaLogsUID = 'victoriaLogsUID';
+
+    beforeAll(() => {
+      setDataSourceSrv({
+        getInstanceSettings() {
+          return {
+            uid: victoriaLogsUID,
+            name: 'VictoriaLogs',
+            type: 'victoriametrics-logs-datasource',
+          } as unknown as DataSourceInstanceSettings;
+        },
+      } as unknown as DataSourceSrv);
+
+      setLinkSrv(new LinkSrv());
+      setTemplateSrv(new TemplateSrv());
+    });
+
+    it('with default keys when tags not configured', () => {
+      const createLink = setupSpanLinkFactory({}, victoriaLogsUID);
+      const links = createLink!(createTraceSpan());
+
+      const linkDef = links?.[0];
+      expect(linkDef).toBeDefined();
+      expect(linkDef?.type).toBe(SpanLinkType.Logs);
+      expect(linkDef!.href).toBe(
+        `/explore?left=${encodeURIComponent(
+          '{"range":{"from":"1602637200000","to":"1602637201000"},"datasource":"victoriaLogsUID","queries":[{"expr":"cluster:=\\"cluster1\\" AND hostname:=\\"hostname1\\" AND service_namespace:=\\"namespace1\\"","refId":""}]}'
+        )}`
+      );
+    });
+
+    it('formats query correctly if filterByTraceID and filterBySpanID is true', () => {
+      const createLink = setupSpanLinkFactory(
+        {
+          datasourceUid: victoriaLogsUID,
+          filterByTraceID: true,
+          filterBySpanID: true,
+        },
+        victoriaLogsUID
+      );
+
+      const links = createLink!(createTraceSpan());
+
+      const linkDef = links?.[0];
+      expect(linkDef).toBeDefined();
+      expect(linkDef?.type).toBe(SpanLinkType.Logs);
+      expect(linkDef!.href).toBe(
+        `/explore?left=${encodeURIComponent(
+          '{"range":{"from":"1602637200000","to":"1602637201000"},"datasource":"victoriaLogsUID","queries":[{"expr":"span_id:=\\"6605c7b08e715d6c\\" AND trace_id:=\\"7946b05c2e2e4e5a\\" AND cluster:=\\"cluster1\\" AND hostname:=\\"hostname1\\" AND service_namespace:=\\"namespace1\\"","refId":""}]}'
+        )}`
+      );
+    });
+
+    it('should format multiple tags correctly', () => {
+      const createLink = setupSpanLinkFactory(
+        {
+          tags: [{ key: 'ip' }, { key: 'hostname' }],
+        },
+        victoriaLogsUID
+      );
+
+      const links = createLink!(
+        createTraceSpan({
+          process: {
+            serviceName: 'service',
+            tags: [
+              { key: 'hostname', value: 'hostname1' },
+              { key: 'ip', value: '192.168.0.1' },
+            ],
+          },
+        })
+      );
+
+      const linkDef = links?.[0];
+      expect(linkDef).toBeDefined();
+      expect(linkDef?.type).toBe(SpanLinkType.Logs);
+      expect(linkDef!.href).toBe(
+        `/explore?left=${encodeURIComponent(
+          '{"range":{"from":"1602637200000","to":"1602637201000"},"datasource":"victoriaLogsUID","queries":[{"expr":"hostname:=\\"hostname1\\" AND ip:=\\"192.168.0.1\\"","refId":""}]}'
+        )}`
+      );
+    });
+  });
 });
 
 describe('dataFrame links', () => {

public/app/features/explore/TraceView/createSpanLink.tsx

@@ -196,6 +196,13 @@ function legacyCreateSpanLinkFactory(
         case 'googlecloud-logging-datasource':
           tags = getFormattedTags(span, tagsToUse, { joinBy: ' AND ' });
           query = getQueryForGoogleCloudLogging(span, traceToLogsOptions, tags, customQuery);
+          break;
+        case 'victoriametrics-logs-datasource':
+          // Build tag selector using strict equality (":=") required by LogsQL
+          // See https://docs.victoriametrics.com/victorialogs/logsql/#exact-filter
+          tags = getFormattedTags(span, tagsToUse, { labelValueSign: ':=', joinBy: ' AND ' });
+          query = getQueryForVictoriaLogs(span, traceToLogsOptions, tags, customQuery);
+          break;
       }
 
       // query can be false in case the simple UI tag mapping is used but none of them are present in the span.
@@ -568,6 +575,45 @@ function getQueryForFalconLogScale(span: TraceSpan, options: TraceToLogsOptionsV
   };
 }
 
+/**
+ * Builds a LogsQL expression for victoria‑metrics‑logs‑datasource.
+ * Uses := for exact‑match filters and joins parts with AND.
+ * See https://docs.victoriametrics.com/victorialogs/logsql/#exact-filter
+ */
+function getQueryForVictoriaLogs(span: TraceSpan, options: TraceToLogsOptionsV2, tags: string, customQuery?: string) {
+  const { filterByTraceID, filterBySpanID } = options;
+
+  // Custom user query has priority
+  if (customQuery) {
+    return {
+      expr: customQuery,
+      refId: '',
+    };
+  }
+
+  const parts: string[] = [];
+
+  if (filterBySpanID && span.spanID) {
+    parts.push('span_id:="${__span.spanId}"');
+  }
+  if (filterByTraceID && span.traceID) {
+    parts.push('trace_id:="${__span.traceId}"');
+  }
+  if (tags) {
+    parts.push('${__tags}');
+  }
+
+  // Nothing to match against – do not create the link
+  if (!parts.length) {
+    return undefined;
+  }
+
+  return {
+    expr: parts.join(' AND '),
+    refId: '',
+  };
+}
+
 /**
  * Creates a string representing all the tags already formatted for use in the query. The tags are filtered so that
  * only intersection of tags that exist in a span and tags that you want are serialized into the string.