func (serv MetricsService) Query(w http.ResponseWriter, r *http.Request) {
setAccessControlHeaders(w)
params := http_utils.GetQueryParams(r)
expr := params.Get("expr")
asText := params.Get("asText")
var format ast.OutputFormat
// BUG(julius): Use Content-Type negotiation.
if asText == "" {
format = ast.JSON
w.Header().Set("Content-Type", "application/json")
} else {
format = ast.TEXT
w.Header().Set("Content-Type", "text/plain")
}
exprNode, err := rules.LoadExprFromString(expr)
if err != nil {
fmt.Fprint(w, ast.ErrorToJSON(err))
return
}
timestamp := clientmodel.TimestampFromTime(serv.time.Now())
queryStats := stats.NewTimerGroup()
result := ast.EvalToString(exprNode, timestamp, format, serv.Storage, queryStats)
glog.Infof("Instant query: %s\nQuery stats:\n%s\n", expr, queryStats)
fmt.Fprint(w, result)
}
func (serv MetricsService) Query(expr string, formatJson string) (result string) {
exprNode, err := rules.LoadExprFromString(expr)
if err != nil {
return ast.ErrorToJSON(err)
}
timestamp := serv.time.Now()
rb := serv.ResponseBuilder()
var format ast.OutputFormat
if formatJson != "" {
format = ast.JSON
rb.SetContentType(gorest.Application_Json)
} else {
format = ast.TEXT
rb.SetContentType(gorest.Text_Plain)
}
return ast.EvalToString(exprNode, timestamp, format)
}
func TestExpressions(t *testing.T) {
temporaryDirectory := test.NewTemporaryDirectory("rule_expression_tests", t)
defer temporaryDirectory.Close()
tieredStorage, err := metric.NewTieredStorage(5000, 5000, 100, time.Second*30, time.Second*1, time.Second*20, temporaryDirectory.Path())
if err != nil {
t.Fatalf("Error opening storage: %s", err)
}
go tieredStorage.Serve()
ast.SetStorage(tieredStorage)
storeMatrix(tieredStorage, testMatrix)
tieredStorage.Flush()
for i, exprTest := range expressionTests {
expectedLines := annotateWithTime(exprTest.output)
testExpr, err := LoadExprFromString(exprTest.expr)
if err != nil {
if exprTest.shouldFail {
continue
}
t.Errorf("%d Error during parsing: %v", i, err)
t.Errorf("%d Expression: %v", i, exprTest.expr)
} else {
if exprTest.shouldFail {
t.Errorf("%d Test should fail, but didn't", i)
}
failed := false
resultStr := ast.EvalToString(testExpr, testEvalTime, ast.TEXT)
resultLines := strings.Split(resultStr, "\n")
if len(exprTest.output) != len(resultLines) {
t.Errorf("%d Number of samples in expected and actual output don't match", i)
failed = true
}
if exprTest.checkOrder {
for j, expectedSample := range expectedLines {
if resultLines[j] != expectedSample {
t.Errorf("%d.%d Expected sample '%v', got '%v'", i, j, resultLines[j], expectedSample)
failed = true
}
}
} else {
for j, expectedSample := range expectedLines {
found := false
for _, actualSample := range resultLines {
if actualSample == expectedSample {
found = true
}
}
if !found {
t.Errorf("%d.%d Couldn't find expected sample in output: '%v'", i, j, expectedSample)
failed = true
}
}
}
analyzer := ast.NewQueryAnalyzer()
analyzer.AnalyzeQueries(testExpr)
if exprTest.fullRanges != len(analyzer.FullRanges) {
t.Errorf("%d Count of full ranges didn't match: %v vs %v", i, exprTest.fullRanges, len(analyzer.FullRanges))
failed = true
}
if exprTest.intervalRanges != len(analyzer.IntervalRanges) {
t.Errorf("%d Count of interval ranges didn't match: %v vs %v", i, exprTest.intervalRanges, len(analyzer.IntervalRanges))
failed = true
}
if failed {
t.Errorf("%d Expression: %v\n%v", i, exprTest.expr, vectorComparisonString(expectedLines, resultLines))
}
}
}
}
func TestExpressions(t *testing.T) {
// Labels in expected output need to be alphabetically sorted.
var expressionTests = []struct {
expr string
output []string
shouldFail bool
checkOrder bool
fullRanges int
intervalRanges int
}{
{
expr: `SUM(http_requests)`,
output: []string{`http_requests => 3600 @[%v]`},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests{instance="0"}) BY(job)`,
output: []string{
`http_requests{job="api-server"} => 400 @[%v]`,
`http_requests{job="app-server"} => 1200 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
}, {
expr: `SUM(http_requests{instance="0"}) BY(job) KEEPING_EXTRA`,
output: []string{
`http_requests{instance="0", job="api-server"} => 400 @[%v]`,
`http_requests{instance="0", job="app-server"} => 1200 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
}, {
expr: `SUM(http_requests) BY (job)`,
output: []string{
`http_requests{job="api-server"} => 1000 @[%v]`,
`http_requests{job="app-server"} => 2600 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
// Non-existent labels mentioned in BY-clauses shouldn't propagate to output.
expr: `SUM(http_requests) BY (job, nonexistent)`,
output: []string{
`http_requests{job="api-server"} => 1000 @[%v]`,
`http_requests{job="app-server"} => 2600 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `
// Test comment.
SUM(http_requests) BY /* comments shouldn't
have any effect */ (job) // another comment`,
output: []string{
`http_requests{job="api-server"} => 1000 @[%v]`,
`http_requests{job="app-server"} => 2600 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `COUNT(http_requests) BY (job)`,
output: []string{
`http_requests{job="api-server"} => 4 @[%v]`,
`http_requests{job="app-server"} => 4 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job, group)`,
output: []string{
`http_requests{group="canary", job="api-server"} => 700 @[%v]`,
`http_requests{group="canary", job="app-server"} => 1500 @[%v]`,
`http_requests{group="production", job="api-server"} => 300 @[%v]`,
`http_requests{group="production", job="app-server"} => 1100 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `AVG(http_requests) BY (job)`,
output: []string{
`http_requests{job="api-server"} => 250 @[%v]`,
`http_requests{job="app-server"} => 650 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `MIN(http_requests) BY (job)`,
output: []string{
`http_requests{job="api-server"} => 100 @[%v]`,
`http_requests{job="app-server"} => 500 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `MAX(http_requests) BY (job)`,
output: []string{
`http_requests{job="api-server"} => 400 @[%v]`,
`http_requests{job="app-server"} => 800 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) - COUNT(http_requests) BY (job)`,
output: []string{
`http_requests{job="api-server"} => 996 @[%v]`,
`http_requests{job="app-server"} => 2596 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `2 - SUM(http_requests) BY (job)`,
output: []string{
`http_requests{job="api-server"} => -998 @[%v]`,
`http_requests{job="app-server"} => -2598 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `1000 / SUM(http_requests) BY (job)`,
output: []string{
`http_requests{job="api-server"} => 1 @[%v]`,
`http_requests{job="app-server"} => 0.38461538461538464 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) - 2`,
output: []string{
`http_requests{job="api-server"} => 998 @[%v]`,
`http_requests{job="app-server"} => 2598 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) % 3`,
output: []string{
`http_requests{job="api-server"} => 1 @[%v]`,
`http_requests{job="app-server"} => 2 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) / 0`,
output: []string{
`http_requests{job="api-server"} => +Inf @[%v]`,
`http_requests{job="app-server"} => +Inf @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) > 1000`,
output: []string{
`http_requests{job="app-server"} => 2600 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `1000 < SUM(http_requests) BY (job)`,
output: []string{
`http_requests{job="app-server"} => 1000 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) <= 1000`,
output: []string{
`http_requests{job="api-server"} => 1000 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) != 1000`,
output: []string{
`http_requests{job="app-server"} => 2600 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) == 1000`,
output: []string{
`http_requests{job="api-server"} => 1000 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) + SUM(http_requests) BY (job)`,
output: []string{
`http_requests{job="api-server"} => 2000 @[%v]`,
`http_requests{job="app-server"} => 5200 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `http_requests{job="api-server", group="canary"}`,
output: []string{
`http_requests{group="canary", instance="0", job="api-server"} => 300 @[%v]`,
`http_requests{group="canary", instance="1", job="api-server"} => 400 @[%v]`,
},
fullRanges: 0,
intervalRanges: 2,
}, {
expr: `http_requests{job="api-server", group="canary"} + delta(http_requests{job="api-server"}[5m], 1)`,
output: []string{
`http_requests{group="canary", instance="0", job="api-server"} => 330 @[%v]`,
`http_requests{group="canary", instance="1", job="api-server"} => 440 @[%v]`,
},
fullRanges: 4,
intervalRanges: 0,
}, {
expr: `delta(http_requests[25m], 1)`,
output: []string{
`http_requests{group="canary", instance="0", job="api-server"} => 150 @[%v]`,
`http_requests{group="canary", instance="0", job="app-server"} => 350 @[%v]`,
`http_requests{group="canary", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="canary", instance="1", job="app-server"} => 400 @[%v]`,
`http_requests{group="production", instance="0", job="api-server"} => 50 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 250 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 100 @[%v]`,
`http_requests{group="production", instance="1", job="app-server"} => 300 @[%v]`,
},
fullRanges: 8,
intervalRanges: 0,
}, {
expr: `sort(http_requests)`,
output: []string{
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="canary", instance="0", job="api-server"} => 300 @[%v]`,
`http_requests{group="canary", instance="1", job="api-server"} => 400 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
`http_requests{group="canary", instance="0", job="app-server"} => 700 @[%v]`,
`http_requests{group="canary", instance="1", job="app-server"} => 800 @[%v]`,
},
checkOrder: true,
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `sort_desc(http_requests)`,
output: []string{
`http_requests{group="canary", instance="1", job="app-server"} => 800 @[%v]`,
`http_requests{group="canary", instance="0", job="app-server"} => 700 @[%v]`,
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
`http_requests{group="canary", instance="1", job="api-server"} => 400 @[%v]`,
`http_requests{group="canary", instance="0", job="api-server"} => 300 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
},
checkOrder: true,
fullRanges: 0,
intervalRanges: 8,
}, {
// Single-letter label names and values.
expr: `x{y="testvalue"}`,
output: []string{
`x{y="testvalue"} => 100 @[%v]`,
},
fullRanges: 0,
intervalRanges: 1,
}, {
// Lower-cased aggregation operators should work too.
expr: `sum(http_requests) by (job) + min(http_requests) by (job) + max(http_requests) by (job) + avg(http_requests) by (job)`,
output: []string{
`http_requests{job="app-server"} => 4550 @[%v]`,
`http_requests{job="api-server"} => 1750 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
// Deltas should be adjusted for target interval vs. samples under target interval.
expr: `delta(http_requests{group="canary", instance="1", job="app-server"}[18m], 1)`,
output: []string{`http_requests{group="canary", instance="1", job="app-server"} => 288 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// Rates should transform per-interval deltas to per-second rates.
expr: `rate(http_requests{group="canary", instance="1", job="app-server"}[10m])`,
output: []string{`http_requests{group="canary", instance="1", job="app-server"} => 0.26666666666666666 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// Counter resets in middle of range are ignored by delta() if counter == 1.
expr: `delta(testcounter_reset_middle[50m], 1)`,
output: []string{`testcounter_reset_middle => 90 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// Counter resets in middle of range are not ignored by delta() if counter == 0.
expr: `delta(testcounter_reset_middle[50m], 0)`,
output: []string{`testcounter_reset_middle => 50 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// Counter resets at end of range are ignored by delta() if counter == 1.
expr: `delta(testcounter_reset_end[5m], 1)`,
output: []string{`testcounter_reset_end => 0 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// Counter resets at end of range are not ignored by delta() if counter == 0.
expr: `delta(testcounter_reset_end[5m], 0)`,
output: []string{`testcounter_reset_end => -90 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// count_scalar for a non-empty vector should return scalar element count.
expr: `count_scalar(http_requests)`,
output: []string{`scalar: 8 @[%v]`},
fullRanges: 0,
intervalRanges: 8,
}, {
// count_scalar for an empty vector should return scalar 0.
expr: `count_scalar(nonexistent)`,
output: []string{`scalar: 0 @[%v]`},
fullRanges: 0,
intervalRanges: 0,
}, {
// Empty expressions shouldn"t parse.
expr: ``,
shouldFail: true,
}, {
// Interval durations can"t be in quotes.
expr: `http_requests["1m"]`,
shouldFail: true,
}, {
// Binop arguments need to be scalar or vector.
expr: `http_requests - http_requests[1m]`,
shouldFail: true,
}, {
expr: `http_requests{group!="canary"}`,
output: []string{
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
}, {
expr: `http_requests{job=~"server",group!="canary"}`,
output: []string{
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
}, {
expr: `http_requests{job!~"api",group!="canary"}`,
output: []string{
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
},
fullRanges: 0,
intervalRanges: 2,
}, {
expr: `count_scalar(http_requests{job=~"^server$"})`,
output: []string{`scalar: 0 @[%v]`},
fullRanges: 0,
intervalRanges: 0,
}, {
expr: `http_requests{group="production",job=~"^api"}`,
output: []string{
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
},
fullRanges: 0,
intervalRanges: 2,
},
}
tieredStorage, closer := newTestStorage(t)
defer closer.Close()
tieredStorage.Flush()
for i, exprTest := range expressionTests {
expectedLines := annotateWithTime(exprTest.output, testEvalTime)
testExpr, err := LoadExprFromString(exprTest.expr)
if err != nil {
if exprTest.shouldFail {
continue
}
t.Errorf("%d. Error during parsing: %v", i, err)
t.Errorf("%d. Expression: %v", i, exprTest.expr)
} else {
if exprTest.shouldFail {
t.Errorf("%d. Test should fail, but didn't", i)
}
failed := false
resultStr := ast.EvalToString(testExpr, testEvalTime, ast.TEXT, tieredStorage, stats.NewTimerGroup())
resultLines := strings.Split(resultStr, "\n")
if len(exprTest.output) != len(resultLines) {
t.Errorf("%d. Number of samples in expected and actual output don't match", i)
failed = true
}
if exprTest.checkOrder {
for j, expectedSample := range expectedLines {
if resultLines[j] != expectedSample {
t.Errorf("%d.%d. Expected sample '%v', got '%v'", i, j, resultLines[j], expectedSample)
failed = true
}
}
} else {
for j, expectedSample := range expectedLines {
found := false
for _, actualSample := range resultLines {
if actualSample == expectedSample {
found = true
}
}
if !found {
t.Errorf("%d.%d. Couldn't find expected sample in output: '%v'", i, j, expectedSample)
failed = true
}
}
}
analyzer := ast.NewQueryAnalyzer(tieredStorage)
analyzer.AnalyzeQueries(testExpr)
if exprTest.fullRanges != len(analyzer.FullRanges) {
t.Errorf("%d. Count of full ranges didn't match: %v vs %v", i, exprTest.fullRanges, len(analyzer.FullRanges))
failed = true
}
if exprTest.intervalRanges != len(analyzer.IntervalRanges) {
t.Errorf("%d. Count of interval ranges didn't match: %v vs %v", i, exprTest.intervalRanges, len(analyzer.IntervalRanges))
failed = true
}
if failed {
t.Errorf("%d. Expression: %v\n%v", i, exprTest.expr, vectorComparisonString(expectedLines, resultLines))
}
}
}
}
func TestExpressions(t *testing.T) {
// Labels in expected output need to be alphabetically sorted.
expressionTests := []struct {
expr string
output []string
shouldFail bool
checkOrder bool
fullRanges int
intervalRanges int
}{
{
expr: `SUM(http_requests)`,
output: []string{`{} => 3600 @[%v]`},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests{instance="0"}) BY(job)`,
output: []string{
`{job="api-server"} => 400 @[%v]`,
`{job="app-server"} => 1200 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
}, {
expr: `SUM(http_requests{instance="0"}) BY(job) KEEPING_EXTRA`,
output: []string{
`{instance="0", job="api-server"} => 400 @[%v]`,
`{instance="0", job="app-server"} => 1200 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
}, {
expr: `SUM(http_requests) BY (job)`,
output: []string{
`{job="api-server"} => 1000 @[%v]`,
`{job="app-server"} => 2600 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
// Non-existent labels mentioned in BY-clauses shouldn't propagate to output.
expr: `SUM(http_requests) BY (job, nonexistent)`,
output: []string{
`{job="api-server"} => 1000 @[%v]`,
`{job="app-server"} => 2600 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `
// Test comment.
SUM(http_requests) BY /* comments shouldn't
have any effect */ (job) // another comment`,
output: []string{
`{job="api-server"} => 1000 @[%v]`,
`{job="app-server"} => 2600 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `COUNT(http_requests) BY (job)`,
output: []string{
`{job="api-server"} => 4 @[%v]`,
`{job="app-server"} => 4 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job, group)`,
output: []string{
`{group="canary", job="api-server"} => 700 @[%v]`,
`{group="canary", job="app-server"} => 1500 @[%v]`,
`{group="production", job="api-server"} => 300 @[%v]`,
`{group="production", job="app-server"} => 1100 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `AVG(http_requests) BY (job)`,
output: []string{
`{job="api-server"} => 250 @[%v]`,
`{job="app-server"} => 650 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `MIN(http_requests) BY (job)`,
output: []string{
`{job="api-server"} => 100 @[%v]`,
`{job="app-server"} => 500 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `MAX(http_requests) BY (job)`,
output: []string{
`{job="api-server"} => 400 @[%v]`,
`{job="app-server"} => 800 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) - COUNT(http_requests) BY (job)`,
output: []string{
`{job="api-server"} => 996 @[%v]`,
`{job="app-server"} => 2596 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `2 - SUM(http_requests) BY (job)`,
output: []string{
`{job="api-server"} => -998 @[%v]`,
`{job="app-server"} => -2598 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `1000 / SUM(http_requests) BY (job)`,
output: []string{
`{job="api-server"} => 1 @[%v]`,
`{job="app-server"} => 0.38461538461538464 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) - 2`,
output: []string{
`{job="api-server"} => 998 @[%v]`,
`{job="app-server"} => 2598 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) % 3`,
output: []string{
`{job="api-server"} => 1 @[%v]`,
`{job="app-server"} => 2 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) / 0`,
output: []string{
`{job="api-server"} => +Inf @[%v]`,
`{job="app-server"} => +Inf @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) > 1000`,
output: []string{
`{job="app-server"} => 2600 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `1000 < SUM(http_requests) BY (job)`,
output: []string{
`{job="app-server"} => 1000 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) <= 1000`,
output: []string{
`{job="api-server"} => 1000 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) != 1000`,
output: []string{
`{job="app-server"} => 2600 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) == 1000`,
output: []string{
`{job="api-server"} => 1000 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `SUM(http_requests) BY (job) + SUM(http_requests) BY (job)`,
output: []string{
`{job="api-server"} => 2000 @[%v]`,
`{job="app-server"} => 5200 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `http_requests{job="api-server", group="canary"}`,
output: []string{
`http_requests{group="canary", instance="0", job="api-server"} => 300 @[%v]`,
`http_requests{group="canary", instance="1", job="api-server"} => 400 @[%v]`,
},
fullRanges: 0,
intervalRanges: 2,
}, {
expr: `http_requests{job="api-server", group="canary"} + rate(http_requests{job="api-server"}[5m]) * 5 * 60`,
output: []string{
`{group="canary", instance="0", job="api-server"} => 330 @[%v]`,
`{group="canary", instance="1", job="api-server"} => 440 @[%v]`,
},
fullRanges: 4,
intervalRanges: 0,
}, {
expr: `rate(http_requests[25m]) * 25 * 60`,
output: []string{
`{group="canary", instance="0", job="api-server"} => 150 @[%v]`,
`{group="canary", instance="0", job="app-server"} => 350 @[%v]`,
`{group="canary", instance="1", job="api-server"} => 200 @[%v]`,
`{group="canary", instance="1", job="app-server"} => 400 @[%v]`,
`{group="production", instance="0", job="api-server"} => 50 @[%v]`,
`{group="production", instance="0", job="app-server"} => 249.99999999999997 @[%v]`,
`{group="production", instance="1", job="api-server"} => 100 @[%v]`,
`{group="production", instance="1", job="app-server"} => 300 @[%v]`,
},
fullRanges: 8,
intervalRanges: 0,
}, {
expr: `delta(http_requests[25m], 1)`,
output: []string{
`{group="canary", instance="0", job="api-server"} => 150 @[%v]`,
`{group="canary", instance="0", job="app-server"} => 350 @[%v]`,
`{group="canary", instance="1", job="api-server"} => 200 @[%v]`,
`{group="canary", instance="1", job="app-server"} => 400 @[%v]`,
`{group="production", instance="0", job="api-server"} => 50 @[%v]`,
`{group="production", instance="0", job="app-server"} => 250 @[%v]`,
`{group="production", instance="1", job="api-server"} => 100 @[%v]`,
`{group="production", instance="1", job="app-server"} => 300 @[%v]`,
},
fullRanges: 8,
intervalRanges: 0,
}, {
expr: `sort(http_requests)`,
output: []string{
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="canary", instance="0", job="api-server"} => 300 @[%v]`,
`http_requests{group="canary", instance="1", job="api-server"} => 400 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
`http_requests{group="canary", instance="0", job="app-server"} => 700 @[%v]`,
`http_requests{group="canary", instance="1", job="app-server"} => 800 @[%v]`,
},
checkOrder: true,
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `sort_desc(http_requests)`,
output: []string{
`http_requests{group="canary", instance="1", job="app-server"} => 800 @[%v]`,
`http_requests{group="canary", instance="0", job="app-server"} => 700 @[%v]`,
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
`http_requests{group="canary", instance="1", job="api-server"} => 400 @[%v]`,
`http_requests{group="canary", instance="0", job="api-server"} => 300 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
},
checkOrder: true,
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `topk(3, http_requests)`,
output: []string{
`http_requests{group="canary", instance="1", job="app-server"} => 800 @[%v]`,
`http_requests{group="canary", instance="0", job="app-server"} => 700 @[%v]`,
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
},
checkOrder: true,
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `topk(5, http_requests{group="canary",job="app-server"})`,
output: []string{
`http_requests{group="canary", instance="1", job="app-server"} => 800 @[%v]`,
`http_requests{group="canary", instance="0", job="app-server"} => 700 @[%v]`,
},
checkOrder: true,
fullRanges: 0,
intervalRanges: 2,
}, {
expr: `bottomk(3, http_requests)`,
output: []string{
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="canary", instance="0", job="api-server"} => 300 @[%v]`,
},
checkOrder: true,
fullRanges: 0,
intervalRanges: 8,
}, {
expr: `bottomk(5, http_requests{group="canary",job="app-server"})`,
output: []string{
`http_requests{group="canary", instance="0", job="app-server"} => 700 @[%v]`,
`http_requests{group="canary", instance="1", job="app-server"} => 800 @[%v]`,
},
checkOrder: true,
fullRanges: 0,
intervalRanges: 2,
}, {
// Single-letter label names and values.
expr: `x{y="testvalue"}`,
output: []string{
`x{y="testvalue"} => 100 @[%v]`,
},
fullRanges: 0,
intervalRanges: 1,
}, {
// Lower-cased aggregation operators should work too.
expr: `sum(http_requests) by (job) + min(http_requests) by (job) + max(http_requests) by (job) + avg(http_requests) by (job)`,
output: []string{
`{job="app-server"} => 4550 @[%v]`,
`{job="api-server"} => 1750 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
}, {
// Deltas should be adjusted for target interval vs. samples under target interval.
expr: `delta(http_requests{group="canary", instance="1", job="app-server"}[18m])`,
output: []string{`{group="canary", instance="1", job="app-server"} => 288 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// Deltas should perform the same operation when 2nd argument is 0.
expr: `delta(http_requests{group="canary", instance="1", job="app-server"}[18m], 0)`,
output: []string{`{group="canary", instance="1", job="app-server"} => 288 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// Rates should calculate per-second rates.
expr: `rate(http_requests{group="canary", instance="1", job="app-server"}[60m])`,
output: []string{`{group="canary", instance="1", job="app-server"} => 0.26666666666666666 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// Deriv should return the same as rate in simple cases.
expr: `deriv(http_requests{group="canary", instance="1", job="app-server"}[60m])`,
output: []string{`{group="canary", instance="1", job="app-server"} => 0.26666666666666666 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// Counter resets at in the middle of range are handled correctly by rate().
expr: `rate(testcounter_reset_middle[60m])`,
output: []string{`{} => 0.03 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// Counter resets at end of range are ignored by rate().
expr: `rate(testcounter_reset_end[5m])`,
output: []string{`{} => 0 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// Deriv should return correct result.
expr: `deriv(testcounter_reset_middle[100m])`,
output: []string{`{} => 0.010606060606060607 @[%v]`},
fullRanges: 1,
intervalRanges: 0,
}, {
// count_scalar for a non-empty vector should return scalar element count.
expr: `count_scalar(http_requests)`,
output: []string{`scalar: 8 @[%v]`},
fullRanges: 0,
intervalRanges: 8,
}, {
// count_scalar for an empty vector should return scalar 0.
expr: `count_scalar(nonexistent)`,
output: []string{`scalar: 0 @[%v]`},
fullRanges: 0,
intervalRanges: 0,
}, {
// Empty expressions shouldn't parse.
expr: ``,
shouldFail: true,
}, {
// Interval durations can't be in quotes.
expr: `http_requests["1m"]`,
shouldFail: true,
}, {
// Binop arguments need to be scalar or vector.
expr: `http_requests - http_requests[1m]`,
shouldFail: true,
}, {
expr: `http_requests{group!="canary"}`,
output: []string{
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
}, {
expr: `http_requests{job=~"server",group!="canary"}`,
output: []string{
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
}, {
expr: `http_requests{job!~"api",group!="canary"}`,
output: []string{
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
},
fullRanges: 0,
intervalRanges: 2,
}, {
expr: `count_scalar(http_requests{job=~"^server$"})`,
output: []string{`scalar: 0 @[%v]`},
fullRanges: 0,
intervalRanges: 0,
}, {
expr: `http_requests{group="production",job=~"^api"}`,
output: []string{
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
},
fullRanges: 0,
intervalRanges: 2,
},
{
expr: `abs(-1 * http_requests{group="production",job="api-server"})`,
output: []string{
`{group="production", instance="0", job="api-server"} => 100 @[%v]`,
`{group="production", instance="1", job="api-server"} => 200 @[%v]`,
},
fullRanges: 0,
intervalRanges: 2,
},
{
expr: `avg_over_time(http_requests{group="production",job="api-server"}[1h])`,
output: []string{
`{group="production", instance="0", job="api-server"} => 50 @[%v]`,
`{group="production", instance="1", job="api-server"} => 100 @[%v]`,
},
fullRanges: 2,
intervalRanges: 0,
},
{
expr: `count_over_time(http_requests{group="production",job="api-server"}[1h])`,
output: []string{
`{group="production", instance="0", job="api-server"} => 11 @[%v]`,
`{group="production", instance="1", job="api-server"} => 11 @[%v]`,
},
fullRanges: 2,
intervalRanges: 0,
},
{
expr: `max_over_time(http_requests{group="production",job="api-server"}[1h])`,
output: []string{
`{group="production", instance="0", job="api-server"} => 100 @[%v]`,
`{group="production", instance="1", job="api-server"} => 200 @[%v]`,
},
fullRanges: 2,
intervalRanges: 0,
},
{
expr: `min_over_time(http_requests{group="production",job="api-server"}[1h])`,
output: []string{
`{group="production", instance="0", job="api-server"} => 0 @[%v]`,
`{group="production", instance="1", job="api-server"} => 0 @[%v]`,
},
fullRanges: 2,
intervalRanges: 0,
},
{
expr: `sum_over_time(http_requests{group="production",job="api-server"}[1h])`,
output: []string{
`{group="production", instance="0", job="api-server"} => 550 @[%v]`,
`{group="production", instance="1", job="api-server"} => 1100 @[%v]`,
},
fullRanges: 2,
intervalRanges: 0,
},
{
expr: `time()`,
output: []string{`scalar: 3000 @[%v]`},
fullRanges: 0,
intervalRanges: 0,
},
{
expr: `drop_common_labels(http_requests{group="production",job="api-server"})`,
output: []string{
`http_requests{instance="0"} => 100 @[%v]`,
`http_requests{instance="1"} => 200 @[%v]`,
},
fullRanges: 0,
intervalRanges: 2,
},
{
expr: `{` + string(clientmodel.MetricNameLabel) + `=~".*"}`,
output: []string{
`http_requests{group="canary", instance="0", job="api-server"} => 300 @[%v]`,
`http_requests{group="canary", instance="0", job="app-server"} => 700 @[%v]`,
`http_requests{group="canary", instance="1", job="api-server"} => 400 @[%v]`,
`http_requests{group="canary", instance="1", job="app-server"} => 800 @[%v]`,
`http_requests{group="production", instance="0", job="api-server"} => 100 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
`http_requests{group="production", instance="1", job="api-server"} => 200 @[%v]`,
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
`testcounter_reset_end => 0 @[%v]`,
`testcounter_reset_middle => 50 @[%v]`,
`x{y="testvalue"} => 100 @[%v]`,
},
fullRanges: 0,
intervalRanges: 11,
},
{
expr: `{job=~"server", job!~"api"}`,
output: []string{
`http_requests{group="canary", instance="0", job="app-server"} => 700 @[%v]`,
`http_requests{group="canary", instance="1", job="app-server"} => 800 @[%v]`,
`http_requests{group="production", instance="0", job="app-server"} => 500 @[%v]`,
`http_requests{group="production", instance="1", job="app-server"} => 600 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
},
{
// Test alternative "by"-clause order.
expr: `sum by (group) (http_requests{job="api-server"})`,
output: []string{
`{group="canary"} => 700 @[%v]`,
`{group="production"} => 300 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
},
{
// Test alternative "by"-clause order with "keeping_extra".
expr: `sum by (group) keeping_extra (http_requests{job="api-server"})`,
output: []string{
`{group="canary", job="api-server"} => 700 @[%v]`,
`{group="production", job="api-server"} => 300 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
},
{
// Test both alternative "by"-clause orders in one expression.
// Public health warning: stick to one form within an expression (or even
// in an organization), or risk serious user confusion.
expr: `sum(sum by (group) keeping_extra (http_requests{job="api-server"})) by (job)`,
output: []string{
`{job="api-server"} => 1000 @[%v]`,
},
fullRanges: 0,
intervalRanges: 4,
},
{
expr: `absent(nonexistent)`,
output: []string{
`{} => 1 @[%v]`,
},
fullRanges: 0,
intervalRanges: 0,
},
{
expr: `absent(nonexistent{job="testjob", instance="testinstance", method=~".*"})`,
output: []string{
`{instance="testinstance", job="testjob"} => 1 @[%v]`,
},
fullRanges: 0,
intervalRanges: 0,
},
{
expr: `count_scalar(absent(http_requests))`,
output: []string{
`scalar: 0 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
},
{
expr: `count_scalar(absent(sum(http_requests)))`,
output: []string{
`scalar: 0 @[%v]`,
},
fullRanges: 0,
intervalRanges: 8,
},
{
expr: `absent(sum(nonexistent{job="testjob", instance="testinstance"}))`,
output: []string{
`{} => 1 @[%v]`,
},
fullRanges: 0,
intervalRanges: 0,
},
}
storage, closer := newTestStorage(t)
defer closer.Close()
for i, exprTest := range expressionTests {
expectedLines := annotateWithTime(exprTest.output, testEvalTime)
testExpr, err := LoadExprFromString(exprTest.expr)
if err != nil {
if exprTest.shouldFail {
continue
}
t.Errorf("%d. Error during parsing: %v", i, err)
t.Errorf("%d. Expression: %v", i, exprTest.expr)
} else {
if exprTest.shouldFail {
t.Errorf("%d. Test should fail, but didn't", i)
}
failed := false
resultStr := ast.EvalToString(testExpr, testEvalTime, ast.Text, storage, stats.NewTimerGroup())
resultLines := strings.Split(resultStr, "\n")
if len(exprTest.output) != len(resultLines) {
t.Errorf("%d. Number of samples in expected and actual output don't match", i)
failed = true
}
if exprTest.checkOrder {
for j, expectedSample := range expectedLines {
if resultLines[j] != expectedSample {
t.Errorf("%d.%d. Expected sample '%v', got '%v'", i, j, resultLines[j], expectedSample)
failed = true
}
}
} else {
for j, expectedSample := range expectedLines {
found := false
for _, actualSample := range resultLines {
if actualSample == expectedSample {
found = true
}
}
if !found {
t.Errorf("%d.%d. Couldn't find expected sample in output: '%v'", i, j, expectedSample)
failed = true
}
}
}
analyzer := ast.NewQueryAnalyzer(storage)
ast.Walk(analyzer, testExpr)
if exprTest.fullRanges != len(analyzer.FullRanges) {
t.Errorf("%d. Count of full ranges didn't match: %v vs %v", i, exprTest.fullRanges, len(analyzer.FullRanges))
failed = true
}
if exprTest.intervalRanges != len(analyzer.IntervalRanges) {
t.Errorf("%d. Count of interval ranges didn't match: %v vs %v", i, exprTest.intervalRanges, len(analyzer.IntervalRanges))
failed = true
}
if failed {
t.Errorf("%d. Expression: %v\n%v", i, exprTest.expr, vectorComparisonString(expectedLines, resultLines))
}
}
}
}
