explore: don't parse log levels if provided by field or label (#17180)

If a field or a label named level is returned from datasource that is 
used as log level for the logs result instead of parsing the log level 
from the message.

Closes #17122

packages/grafana-ui/src/utils/logs.ts

@@ -23,6 +23,15 @@ export function getLogLevel(line: string): LogLevel {
   return LogLevel.unknown;
 }
 
+export function getLogLevelFromKey(key: string): LogLevel {
+  const level = (LogLevel as any)[key];
+  if (level) {
+    return level;
+  }
+
+  return LogLevel.unknown;
+}
+
 export function addLogLevelToSeries(series: SeriesData, lineIndex: number): SeriesData {
   return {
     ...series, // Keeps Tags, RefID etc

public/app/core/logs_model.ts

@@ -13,6 +13,7 @@ import {
   toLegacyResponseData,
   FieldCache,
   FieldType,
+  getLogLevelFromKey,
   LogRowModel,
   LogsModel,
   LogsMetaItem,
@@ -368,7 +369,17 @@ export function processLogSeriesRow(
   const timeEpochMs = time.valueOf();
   const timeFromNow = time.fromNow();
   const timeLocal = time.format('YYYY-MM-DD HH:mm:ss');
-  const logLevel = getLogLevel(message);
+
+  let logLevel = LogLevel.unknown;
+  const logLevelField = fieldCache.getFieldByName('level');
+
+  if (logLevelField) {
+    logLevel = getLogLevelFromKey(row[logLevelField.index]);
+  } else if (series.labels && Object.keys(series.labels).indexOf('level') !== -1) {
+    logLevel = getLogLevelFromKey(series.labels['level']);
+  } else {
+    logLevel = getLogLevel(message);
+  }
   const hasAnsi = hasAnsiCodes(message);
   const searchWords = series.meta && series.meta.searchWords ? series.meta.searchWords : [];
 

public/app/core/specs/logs_model.test.ts

@@ -1,4 +1,4 @@
-import { SeriesData, FieldType, LogsModel, LogsMetaKind, LogsDedupStrategy } from '@grafana/ui';
+import { SeriesData, FieldType, LogsModel, LogsMetaKind, LogsDedupStrategy, LogLevel } from '@grafana/ui';
 import {
   dedupLogRows,
   calculateFieldStats,
@@ -460,8 +460,12 @@ describe('seriesDataToLogsModel', () => {
             name: 'message',
             type: FieldType.string,
           },
+          {
+            name: 'level',
+            type: FieldType.string,
+          },
         ],
-        rows: [['1970-01-01T00:00:01Z', 'WARN boooo']],
+        rows: [['1970-01-01T00:00:01Z', 'WARN boooo', 'dbug']],
       },
     ];
     const logsModel = seriesDataToLogsModel(series, 0);
@@ -470,7 +474,7 @@ describe('seriesDataToLogsModel', () => {
       {
         entry: 'WARN boooo',
         labels: undefined,
-        logLevel: 'warning',
+        logLevel: LogLevel.debug,
         uniqueLabels: {},
       },
     ]);
@@ -482,6 +486,7 @@ describe('seriesDataToLogsModel', () => {
         labels: {
           foo: 'bar',
           baz: '1',
+          level: 'dbug',
         },
         fields: [
           {
@@ -500,6 +505,7 @@ describe('seriesDataToLogsModel', () => {
         labels: {
           foo: 'bar',
           baz: '2',
+          level: 'err',
         },
         fields: [
           {
@@ -521,19 +527,19 @@ describe('seriesDataToLogsModel', () => {
       {
         entry: 'INFO 2',
         labels: { foo: 'bar', baz: '2' },
-        logLevel: 'info',
+        logLevel: LogLevel.error,
         uniqueLabels: { baz: '2' },
       },
       {
         entry: 'WARN boooo',
         labels: { foo: 'bar', baz: '1' },
-        logLevel: 'warning',
+        logLevel: LogLevel.debug,
         uniqueLabels: { baz: '1' },
       },
       {
         entry: 'INFO 1',
         labels: { foo: 'bar', baz: '2' },
-        logLevel: 'info',
+        logLevel: LogLevel.error,
         uniqueLabels: { baz: '2' },
       },
     ]);