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Get query hints per query transaction

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This commit is contained in:
David Kaltschmidt
2018-10-23 15:12:53 +02:00
parent 2e02a8c855
commit fbed57ab43
7 changed files with 122 additions and 140 deletions
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13
public/app/plugins/datasource/prometheus/datasource.ts
View File

@@ -176,7 +176,6 @@ export class PrometheusDatasource {
return this.$q.all(allQueryPromise).then(responseList => {
let result = [];
let hints = [];
_.each(responseList, (response, index) => {
if (response.status === 'error') {
@@ -196,19 +195,13 @@ export class PrometheusDatasource {
end: queries[index].end,
query: queries[index].expr,
responseListLength: responseList.length,
responseIndex: index,
refId: activeTargets[index].refId,
};
const series = this.resultTransformer.transform(response, transformerOptions);
result = [...result, ...series];
if (queries[index].hinting) {
const queryHints = getQueryHints(series, this);
hints = [...hints, ...queryHints];
}
});
return { data: result, hints };
return { data: result };
});
}
@@ -437,6 +430,10 @@ export class PrometheusDatasource {
return state;
}
getQueryHints(query: string, result: any[]) {
return getQueryHints(query, result, this);
}
loadRules() {
this.metadataRequest('/api/v1/rules')
.then(res => res.data || res.json())

168
public/app/plugins/datasource/prometheus/query_hints.ts
View File

@@ -1,100 +1,92 @@
import _ from 'lodash';
export function getQueryHints(series: any[], datasource?: any): any[] {
const hints = series.map((s, i) => {
const query: string = s.query;
const index: number = s.responseIndex;
if (query === undefined || index === undefined) {
return null;
}
export function getQueryHints(query: string, series?: any[], datasource?: any): any[] {
const hints = [];
// ..._bucket metric needs a histogram_quantile()
const histogramMetric = query.trim().match(/^\w+_bucket$/);
if (histogramMetric) {
const label = 'Time series has buckets, you probably wanted a histogram.';
return {
index,
// ..._bucket metric needs a histogram_quantile()
const histogramMetric = query.trim().match(/^\w+_bucket$/);
if (histogramMetric) {
const label = 'Time series has buckets, you probably wanted a histogram.';
hints.push({
type: 'HISTOGRAM_QUANTILE',
label,
fix: {
label: 'Fix by adding histogram_quantile().',
action: {
type: 'ADD_HISTOGRAM_QUANTILE',
query,
},
},
});
}
// Check for monotony on series (table results are being ignored here)
if (series && series.length > 0) {
series.forEach(s => {
const datapoints: number[][] = s.datapoints;
if (query.indexOf('rate(') === -1 && datapoints.length > 1) {
let increasing = false;
const nonNullData = datapoints.filter(dp => dp[0] !== null);
const monotonic = nonNullData.every((dp, index) => {
if (index === 0) {
return true;
}
increasing = increasing || dp[0] > nonNullData[index - 1][0];
// monotonic?
return dp[0] >= nonNullData[index - 1][0];
});
if (increasing && monotonic) {
const simpleMetric = query.trim().match(/^\w+$/);
let label = 'Time series is monotonously increasing.';
let fix;
if (simpleMetric) {
fix = {
label: 'Fix by adding rate().',
action: {
type: 'ADD_RATE',
query,
},
};
} else {
label = `${label} Try applying a rate() function.`;
}
hints.push({
type: 'APPLY_RATE',
label,
fix,
});
}
}
});
}
// Check for recording rules expansion
if (datasource && datasource.ruleMappings) {
const mapping = datasource.ruleMappings;
const mappingForQuery = Object.keys(mapping).reduce((acc, ruleName) => {
if (query.search(ruleName) > -1) {
return {
...acc,
[ruleName]: mapping[ruleName],
};
}
return acc;
}, {});
if (_.size(mappingForQuery) > 0) {
const label = 'Query contains recording rules.';
hints.push({
type: 'EXPAND_RULES',
label,
fix: {
label: 'Fix by adding histogram_quantile().',
label: 'Expand rules',
action: {
type: 'ADD_HISTOGRAM_QUANTILE',
type: 'EXPAND_RULES',
query,
index,
mapping: mappingForQuery,
},
},
};
}
// Check for monotony
const datapoints: number[][] = s.datapoints;
if (query.indexOf('rate(') === -1 && datapoints.length > 1) {
let increasing = false;
const nonNullData = datapoints.filter(dp => dp[0] !== null);
const monotonic = nonNullData.every((dp, index) => {
if (index === 0) {
return true;
}
increasing = increasing || dp[0] > nonNullData[index - 1][0];
// monotonic?
return dp[0] >= nonNullData[index - 1][0];
});
if (increasing && monotonic) {
const simpleMetric = query.trim().match(/^\w+$/);
let label = 'Time series is monotonously increasing.';
let fix;
if (simpleMetric) {
fix = {
label: 'Fix by adding rate().',
action: {
type: 'ADD_RATE',
query,
index,
},
};
} else {
label = `${label} Try applying a rate() function.`;
}
return {
label,
index,
fix,
};
}
}
// Check for recording rules expansion
if (datasource && datasource.ruleMappings) {
const mapping = datasource.ruleMappings;
const mappingForQuery = Object.keys(mapping).reduce((acc, ruleName) => {
if (query.search(ruleName) > -1) {
return {
...acc,
[ruleName]: mapping[ruleName],
};
}
return acc;
}, {});
if (_.size(mappingForQuery) > 0) {
const label = 'Query contains recording rules.';
return {
label,
index,
fix: {
label: 'Expand rules',
action: {
type: 'EXPAND_RULES',
query,
index,
mapping: mappingForQuery,
},
},
};
}
}
// No hint found
return null;
});
return hints;
}
return hints.length > 0 ? hints : null;
}

1
public/app/plugins/datasource/prometheus/result_transformer.ts
View File

@@ -66,7 +66,6 @@ export class ResultTransformer {
return {
datapoints: dps,
query: options.query,
responseIndex: options.responseIndex,
target: metricLabel,
};
}

43
public/app/plugins/datasource/prometheus/specs/query_hints.test.ts
View File

@@ -2,34 +2,31 @@ import { getQueryHints } from '../query_hints';
describe('getQueryHints()', () => {
it('returns no hints for no series', () => {
expect(getQueryHints([])).toEqual([]);
expect(getQueryHints('', [])).toEqual(null);
});
it('returns no hints for empty series', () => {
expect(getQueryHints([{ datapoints: [], query: '' }])).toEqual([null]);
expect(getQueryHints('', [{ datapoints: [] }])).toEqual(null);
});
it('returns no hint for a monotonously decreasing series', () => {
const series = [{ datapoints: [[23, 1000], [22, 1001]], query: 'metric', responseIndex: 0 }];
const hints = getQueryHints(series);
expect(hints).toEqual([null]);
const series = [{ datapoints: [[23, 1000], [22, 1001]] }];
const hints = getQueryHints('metric', series);
expect(hints).toEqual(null);
});
it('returns no hint for a flat series', () => {
const series = [
{ datapoints: [[null, 1000], [23, 1001], [null, 1002], [23, 1003]], query: 'metric', responseIndex: 0 },
];
const hints = getQueryHints(series);
expect(hints).toEqual([null]);
const series = [{ datapoints: [[null, 1000], [23, 1001], [null, 1002], [23, 1003]] }];
const hints = getQueryHints('metric', series);
expect(hints).toEqual(null);
});
it('returns a rate hint for a monotonously increasing series', () => {
const series = [{ datapoints: [[23, 1000], [24, 1001]], query: 'metric', responseIndex: 0 }];
const hints = getQueryHints(series);
const series = [{ datapoints: [[23, 1000], [24, 1001]] }];
const hints = getQueryHints('metric', series);
expect(hints.length).toBe(1);
expect(hints[0]).toMatchObject({
label: 'Time series is monotonously increasing.',
index: 0,
fix: {
action: {
type: 'ADD_RATE',
@@ -40,26 +37,25 @@ describe('getQueryHints()', () => {
});
it('returns no rate hint for a monotonously increasing series that already has a rate', () => {
const series = [{ datapoints: [[23, 1000], [24, 1001]], query: 'rate(metric[1m])', responseIndex: 0 }];
const hints = getQueryHints(series);
expect(hints).toEqual([null]);
const series = [{ datapoints: [[23, 1000], [24, 1001]] }];
const hints = getQueryHints('rate(metric[1m])', series);
expect(hints).toEqual(null);
});
it('returns a rate hint w/o action for a complex monotonously increasing series', () => {
const series = [{ datapoints: [[23, 1000], [24, 1001]], query: 'sum(metric)', responseIndex: 0 }];
const hints = getQueryHints(series);
const series = [{ datapoints: [[23, 1000], [24, 1001]] }];
const hints = getQueryHints('sum(metric)', series);
expect(hints.length).toBe(1);
expect(hints[0].label).toContain('rate()');
expect(hints[0].fix).toBeUndefined();
});
it('returns a rate hint for a monotonously increasing series with missing data', () => {
const series = [{ datapoints: [[23, 1000], [null, 1001], [24, 1002]], query: 'metric', responseIndex: 0 }];
const hints = getQueryHints(series);
const series = [{ datapoints: [[23, 1000], [null, 1001], [24, 1002]] }];
const hints = getQueryHints('metric', series);
expect(hints.length).toBe(1);
expect(hints[0]).toMatchObject({
label: 'Time series is monotonously increasing.',
index: 0,
fix: {
action: {
type: 'ADD_RATE',
@@ -70,12 +66,11 @@ describe('getQueryHints()', () => {
});
it('returns a histogram hint for a bucket series', () => {
const series = [{ datapoints: [[23, 1000]], query: 'metric_bucket', responseIndex: 0 }];
const hints = getQueryHints(series);
const series = [{ datapoints: [[23, 1000]] }];
const hints = getQueryHints('metric_bucket', series);
expect(hints.length).toBe(1);
expect(hints[0]).toMatchObject({
label: 'Time series has buckets, you probably wanted a histogram.',
index: 0,
fix: {
action: {
type: 'ADD_HISTOGRAM_QUANTILE',