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VictoriaMetrics/lib/promrelabel/relabel_test.go
Aliaksandr Valialkin 75c3514c5c lib/promrelabel: add keep_metrics and drop_metrics actions to relabeling rules 
These actions simlify metrics filtering. For example,

- action: keep_metrics
  regex: 'foo|bar|baz'

would leave only metrics with `foo`, `bar` and `baz` names, while the rest of metrics will be deleted.

The commit also makes possible to split long regexps into multiple lines. For example, the following config is equivalent to the config above:

- action: keep_metrics
  regex:
  - foo
  - bar
  - baz
2021-09-09 16:25:09 +03:00

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package promrelabel
import (
"reflect"
"testing"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/prompbmarshal"
)
func TestLabelsToString(t *testing.T) {
f := func(labels []prompbmarshal.Label, sExpected string) {
t.Helper()
s := labelsToString(labels)
if s != sExpected {
t.Fatalf("unexpected result;\ngot\n%s\nwant\n%s", s, sExpected)
}
}
f(nil, "{}")
f([]prompbmarshal.Label{
{
Name: "__name__",
Value: "foo",
},
}, "foo")
f([]prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
}, `{foo="bar"}`)
f([]prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
{
Name: "a",
Value: "bc",
},
}, `{a="bc",foo="bar"}`)
f([]prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
{
Name: "__name__",
Value: "xxx",
},
{
Name: "a",
Value: "bc",
},
}, `xxx{a="bc",foo="bar"}`)
}
func TestApplyRelabelConfigs(t *testing.T) {
f := func(config string, labels []prompbmarshal.Label, isFinalize bool, resultExpected []prompbmarshal.Label) {
t.Helper()
pcs, err := ParseRelabelConfigsData([]byte(config), false)
if err != nil {
t.Fatalf("cannot parse %q: %s", config, err)
}
result := pcs.Apply(labels, 0, isFinalize)
if !reflect.DeepEqual(result, resultExpected) {
t.Fatalf("unexpected result; got\n%v\nwant\n%v", result, resultExpected)
}
}
t.Run("empty_relabel_configs", func(t *testing.T) {
f("", nil, false, nil)
f("", nil, true, nil)
f("", []prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
}, false, []prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
})
f("", []prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
{
Name: "__name__",
Value: "xxx",
},
{
Name: "__aaa",
Value: "yyy",
},
}, true, []prompbmarshal.Label{
{
Name: "__name__",
Value: "xxx",
},
{
Name: "foo",
Value: "bar",
},
})
})
t.Run("replace-miss", func(t *testing.T) {
f(`
- action: replace
target_label: bar
`, nil, false, []prompbmarshal.Label{})
f(`
- action: replace
source_labels: ["foo"]
target_label: bar
`, nil, false, []prompbmarshal.Label{})
f(`
- action: replace
source_labels: ["foo"]
target_label: "bar"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
}, false, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
})
f(`
- action: replace
source_labels: ["foo"]
target_label: "bar"
regex: ".+"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
}, false, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("replace-hit", func(t *testing.T) {
f(`
- action: replace
source_labels: ["xxx", "foo"]
target_label: "bar"
replacement: "a-$1-b"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
}, false, []prompbmarshal.Label{
{
Name: "bar",
Value: "a-yyy;-b",
},
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("replace-remove-label-value-hit", func(t *testing.T) {
f(`
- action: replace
source_labels: ["foo"]
target_label: "foo"
regex: "xxx"
replacement: ""
`, []prompbmarshal.Label{
{
Name: "foo",
Value: "xxx",
},
{
Name: "bar",
Value: "baz",
},
}, false, []prompbmarshal.Label{
{
Name: "bar",
Value: "baz",
},
})
})
t.Run("replace-remove-label-value-miss", func(t *testing.T) {
f(`
- action: replace
source_labels: ["foo"]
target_label: "foo"
regex: "xxx"
replacement: ""
`, []prompbmarshal.Label{
{
Name: "foo",
Value: "yyy",
},
{
Name: "bar",
Value: "baz",
},
}, false, []prompbmarshal.Label{
{
Name: "bar",
Value: "baz",
},
{
Name: "foo",
Value: "yyy",
},
})
})
t.Run("replace-hit-remove-label", func(t *testing.T) {
f(`
- action: replace
source_labels: ["xxx", "foo"]
regex: "yyy;.+"
target_label: "foo"
replacement: ""
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
{
Name: "foo",
Value: "bar",
},
}, false, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("replace-miss-remove-label", func(t *testing.T) {
f(`
- action: replace
source_labels: ["xxx", "foo"]
regex: "yyy;.+"
target_label: "foo"
replacement: ""
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyyz",
},
{
Name: "foo",
Value: "bar",
},
}, false, []prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
{
Name: "xxx",
Value: "yyyz",
},
})
})
t.Run("replace-hit-target-label-with-capture-group", func(t *testing.T) {
f(`
- action: replace
source_labels: ["xxx", "foo"]
target_label: "bar-$1"
replacement: "a-$1-b"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
}, false, []prompbmarshal.Label{
{
Name: "bar-yyy;",
Value: "a-yyy;-b",
},
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("replace_all-miss", func(t *testing.T) {
f(`
- action: replace_all
source_labels: [foo]
target_label: "bar"
`, nil, false, []prompbmarshal.Label{})
f(`
- action: replace_all
source_labels: ["foo"]
target_label: "bar"
`, nil, false, []prompbmarshal.Label{})
f(`
- action: replace_all
source_labels: ["foo"]
target_label: "bar"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
}, false, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
})
f(`
- action: replace_all
source_labels: ["foo"]
target_label: "bar"
regex: ".+"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
}, false, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("replace_all-hit", func(t *testing.T) {
f(`
- action: replace_all
source_labels: ["xxx"]
target_label: "xxx"
regex: "-"
replacement: "."
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "a-b-c",
},
}, false, []prompbmarshal.Label{
{
Name: "xxx",
Value: "a.b.c",
},
})
})
t.Run("replace_all-regex-hit", func(t *testing.T) {
f(`
- action: replace_all
source_labels: ["xxx", "foo"]
target_label: "xxx"
regex: "(;)"
replacement: "-$1-"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "y;y",
},
}, false, []prompbmarshal.Label{
{
Name: "xxx",
Value: "y-;-y-;-",
},
})
})
t.Run("replace-add-multi-labels", func(t *testing.T) {
f(`
- action: replace
source_labels: ["xxx"]
target_label: "bar"
replacement: "a-$1"
- action: replace
source_labels: ["bar"]
target_label: "zar"
replacement: "b-$1"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
{
Name: "instance",
Value: "a.bc",
},
}, true, []prompbmarshal.Label{
{
Name: "bar",
Value: "a-yyy",
},
{
Name: "instance",
Value: "a.bc",
},
{
Name: "xxx",
Value: "yyy",
},
{
Name: "zar",
Value: "b-a-yyy",
},
})
})
t.Run("replace-self", func(t *testing.T) {
f(`
- action: replace
source_labels: ["foo"]
target_label: "foo"
replacement: "a-$1"
`, []prompbmarshal.Label{
{
Name: "foo",
Value: "aaxx",
},
}, true, []prompbmarshal.Label{
{
Name: "foo",
Value: "a-aaxx",
},
})
})
t.Run("replace-missing-source", func(t *testing.T) {
f(`
- action: replace
target_label: foo
replacement: "foobar"
`, []prompbmarshal.Label{}, true, []prompbmarshal.Label{
{
Name: "foo",
Value: "foobar",
},
})
})
t.Run("keep_if_equal-miss", func(t *testing.T) {
f(`
- action: keep_if_equal
source_labels: ["foo", "bar"]
`, nil, true, nil)
f(`
- action: keep_if_equal
source_labels: ["xxx", "bar"]
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
}, true, []prompbmarshal.Label{})
})
t.Run("keep_if_equal-hit", func(t *testing.T) {
f(`
- action: keep_if_equal
source_labels: ["xxx", "bar"]
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
{
Name: "bar",
Value: "yyy",
},
}, true, []prompbmarshal.Label{
{
Name: "bar",
Value: "yyy",
},
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("drop_if_equal-miss", func(t *testing.T) {
f(`
- action: drop_if_equal
source_labels: ["foo", "bar"]
`, nil, true, nil)
f(`
- action: drop_if_equal
source_labels: ["xxx", "bar"]
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
}, true, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("drop_if_equal-hit", func(t *testing.T) {
f(`
- action: drop_if_equal
source_labels: [xxx, bar]
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
{
Name: "bar",
Value: "yyy",
},
}, true, []prompbmarshal.Label{})
})
t.Run("keep-miss", func(t *testing.T) {
f(`
- action: keep
source_labels: [foo]
regex: ".+"
`, nil, true, nil)
f(`
- action: keep
source_labels: [foo]
regex: ".+"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
}, true, []prompbmarshal.Label{})
})
t.Run("keep-hit", func(t *testing.T) {
f(`
- action: keep
source_labels: [foo]
regex: "yyy"
`, []prompbmarshal.Label{
{
Name: "foo",
Value: "yyy",
},
}, false, []prompbmarshal.Label{
{
Name: "foo",
Value: "yyy",
},
})
})
t.Run("keep-hit-regexp", func(t *testing.T) {
f(`
- action: keep
source_labels: ["foo"]
regex: ".+"
`, []prompbmarshal.Label{
{
Name: "foo",
Value: "yyy",
},
}, false, []prompbmarshal.Label{
{
Name: "foo",
Value: "yyy",
},
})
})
t.Run("keep_metrics-miss", func(t *testing.T) {
f(`
- action: keep_metrics
regex:
- foo
- bar
`, []prompbmarshal.Label{
{
Name: "__name__",
Value: "xxx",
},
}, true, []prompbmarshal.Label{})
})
t.Run("keep_metrics-hit", func(t *testing.T) {
f(`
- action: keep_metrics
regex:
- foo
- bar
`, []prompbmarshal.Label{
{
Name: "__name__",
Value: "foo",
},
}, true, []prompbmarshal.Label{
{
Name: "__name__",
Value: "foo",
},
})
})
t.Run("drop-miss", func(t *testing.T) {
f(`
- action: drop
source_labels: [foo]
regex: ".+"
`, nil, false, nil)
f(`
- action: drop
source_labels: [foo]
regex: ".+"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
}, true, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("drop-hit", func(t *testing.T) {
f(`
- action: drop
source_labels: [foo]
regex: yyy
`, []prompbmarshal.Label{
{
Name: "foo",
Value: "yyy",
},
}, true, []prompbmarshal.Label{})
})
t.Run("drop-hit-regexp", func(t *testing.T) {
f(`
- action: drop
source_labels: [foo]
regex: ".+"
`, []prompbmarshal.Label{
{
Name: "foo",
Value: "yyy",
},
}, true, []prompbmarshal.Label{})
})
t.Run("drop_metrics-miss", func(t *testing.T) {
f(`
- action: drop_metrics
regex:
- foo
- bar
`, []prompbmarshal.Label{
{
Name: "__name__",
Value: "xxx",
},
}, true, []prompbmarshal.Label{
{
Name: "__name__",
Value: "xxx",
},
})
})
t.Run("drop_metrics-hit", func(t *testing.T) {
f(`
- action: drop_metrics
regex:
- foo
- bar
`, []prompbmarshal.Label{
{
Name: "__name__",
Value: "foo",
},
}, true, []prompbmarshal.Label{})
})
t.Run("hashmod-miss", func(t *testing.T) {
f(`
- action: hashmod
source_labels: [foo]
target_label: aaa
modulus: 123
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
}, false, []prompbmarshal.Label{
{
Name: "aaa",
Value: "81",
},
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("hashmod-hit", func(t *testing.T) {
f(`
- action: hashmod
source_labels: [foo]
target_label: aaa
modulus: 123
`, []prompbmarshal.Label{
{
Name: "foo",
Value: "yyy",
},
}, true, []prompbmarshal.Label{
{
Name: "aaa",
Value: "73",
},
{
Name: "foo",
Value: "yyy",
},
})
})
t.Run("labelmap-copy-label", func(t *testing.T) {
f(`
- action: labelmap
regex: "foo"
replacement: "bar"
`, []prompbmarshal.Label{
{
Name: "foo",
Value: "yyy",
},
{
Name: "foobar",
Value: "aaa",
},
}, true, []prompbmarshal.Label{
{
Name: "bar",
Value: "yyy",
},
{
Name: "foo",
Value: "yyy",
},
{
Name: "foobar",
Value: "aaa",
},
})
})
t.Run("labelmap-remove-prefix-dot-star", func(t *testing.T) {
f(`
- action: labelmap
regex: "foo(.*)"
`, []prompbmarshal.Label{
{
Name: "xoo",
Value: "yyy",
},
{
Name: "foobar",
Value: "aaa",
},
}, true, []prompbmarshal.Label{
{
Name: "bar",
Value: "aaa",
},
{
Name: "foobar",
Value: "aaa",
},
{
Name: "xoo",
Value: "yyy",
},
})
})
t.Run("labelmap-remove-prefix-dot-plus", func(t *testing.T) {
f(`
- action: labelmap
regex: "foo(.+)"
`, []prompbmarshal.Label{
{
Name: "foo",
Value: "yyy",
},
{
Name: "foobar",
Value: "aaa",
},
}, true, []prompbmarshal.Label{
{
Name: "bar",
Value: "aaa",
},
{
Name: "foo",
Value: "yyy",
},
{
Name: "foobar",
Value: "aaa",
},
})
})
t.Run("labelmap-regex", func(t *testing.T) {
f(`
- action: labelmap
regex: "foo(.+)"
replacement: "$1-x"
`, []prompbmarshal.Label{
{
Name: "foo",
Value: "yyy",
},
{
Name: "foobar",
Value: "aaa",
},
}, true, []prompbmarshal.Label{
{
Name: "bar-x",
Value: "aaa",
},
{
Name: "foo",
Value: "yyy",
},
{
Name: "foobar",
Value: "aaa",
},
})
})
t.Run("labelmap_all", func(t *testing.T) {
f(`
- action: labelmap_all
regex: "\\."
replacement: "-"
`, []prompbmarshal.Label{
{
Name: "foo.bar.baz",
Value: "yyy",
},
{
Name: "foobar",
Value: "aaa",
},
}, true, []prompbmarshal.Label{
{
Name: "foo-bar-baz",
Value: "yyy",
},
{
Name: "foobar",
Value: "aaa",
},
})
})
t.Run("labelmap_all-regexp", func(t *testing.T) {
f(`
- action: labelmap_all
regex: "ba(.)"
replacement: "${1}ss"
`, []prompbmarshal.Label{
{
Name: "foo.bar.baz",
Value: "yyy",
},
{
Name: "foozar",
Value: "aaa",
},
}, true, []prompbmarshal.Label{
{
Name: "foo.rss.zss",
Value: "yyy",
},
{
Name: "foozar",
Value: "aaa",
},
})
})
t.Run("labeldrop", func(t *testing.T) {
f(`
- action: labeldrop
regex: dropme
`, []prompbmarshal.Label{
{
Name: "aaa",
Value: "bbb",
},
}, true, []prompbmarshal.Label{
{
Name: "aaa",
Value: "bbb",
},
})
f(`
- action: labeldrop
regex: dropme
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
{
Name: "dropme",
Value: "aaa",
},
{
Name: "foo",
Value: "bar",
},
}, false, []prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
{
Name: "xxx",
Value: "yyy",
},
})
// regex in single quotes
f(`
- action: labeldrop
regex: 'dropme'
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
{
Name: "dropme",
Value: "aaa",
},
}, false, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
})
// regex in double quotes
f(`
- action: labeldrop
regex: "dropme"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
{
Name: "dropme",
Value: "aaa",
},
}, false, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("labeldrop-prefix", func(t *testing.T) {
f(`
- action: labeldrop
regex: "dropme.*"
`, []prompbmarshal.Label{
{
Name: "aaa",
Value: "bbb",
},
}, true, []prompbmarshal.Label{
{
Name: "aaa",
Value: "bbb",
},
})
f(`
- action: labeldrop
regex: "dropme(.+)"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
{
Name: "dropme-please",
Value: "aaa",
},
{
Name: "foo",
Value: "bar",
},
}, false, []prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("labeldrop-regexp", func(t *testing.T) {
f(`
- action: labeldrop
regex: ".*dropme.*"
`, []prompbmarshal.Label{
{
Name: "aaa",
Value: "bbb",
},
}, true, []prompbmarshal.Label{
{
Name: "aaa",
Value: "bbb",
},
})
f(`
- action: labeldrop
regex: ".*dropme.*"
`, []prompbmarshal.Label{
{
Name: "xxx",
Value: "yyy",
},
{
Name: "dropme-please",
Value: "aaa",
},
{
Name: "foo",
Value: "bar",
},
}, false, []prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
{
Name: "xxx",
Value: "yyy",
},
})
})
t.Run("labelkeep", func(t *testing.T) {
f(`
- action: labelkeep
regex: "keepme"
`, []prompbmarshal.Label{
{
Name: "keepme",
Value: "aaa",
},
}, true, []prompbmarshal.Label{
{
Name: "keepme",
Value: "aaa",
},
})
f(`
- action: labelkeep
regex: keepme
`, []prompbmarshal.Label{
{
Name: "keepme",
Value: "aaa",
},
{
Name: "aaaa",
Value: "awef",
},
{
Name: "keepme-aaa",
Value: "234",
},
}, false, []prompbmarshal.Label{
{
Name: "keepme",
Value: "aaa",
},
})
})
t.Run("labelkeep-regexp", func(t *testing.T) {
f(`
- action: labelkeep
regex: "keepme.*"
`, []prompbmarshal.Label{
{
Name: "keepme",
Value: "aaa",
},
}, true, []prompbmarshal.Label{
{
Name: "keepme",
Value: "aaa",
},
})
f(`
- action: labelkeep
regex: "keepme.*"
`, []prompbmarshal.Label{
{
Name: "keepme",
Value: "aaa",
},
{
Name: "aaaa",
Value: "awef",
},
{
Name: "keepme-aaa",
Value: "234",
},
}, false, []prompbmarshal.Label{
{
Name: "keepme",
Value: "aaa",
},
{
Name: "keepme-aaa",
Value: "234",
},
})
})
}
func TestFinalizeLabels(t *testing.T) {
f := func(labels, resultExpected []prompbmarshal.Label) {
t.Helper()
result := FinalizeLabels(nil, labels)
if !reflect.DeepEqual(result, resultExpected) {
t.Fatalf("unexpected result; got\n%v\nwant\n%v", result, resultExpected)
}
}
f(nil, nil)
f([]prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
{
Name: "__aaa",
Value: "ass",
},
{
Name: "instance",
Value: "foo.com",
},
}, []prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
{
Name: "instance",
Value: "foo.com",
},
})
f([]prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
{
Name: "instance",
Value: "ass",
},
{
Name: "__address__",
Value: "foo.com",
},
}, []prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
{
Name: "instance",
Value: "ass",
},
})
}
func TestRemoveMetaLabels(t *testing.T) {
f := func(labels, resultExpected []prompbmarshal.Label) {
t.Helper()
result := RemoveMetaLabels(nil, labels)
if !reflect.DeepEqual(result, resultExpected) {
t.Fatalf("unexpected result of RemoveMetaLabels;\ngot\n%v\nwant\n%v", result, resultExpected)
}
}
f(nil, nil)
f([]prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
}, []prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
})
f([]prompbmarshal.Label{
{
Name: "__meta_foo",
Value: "bar",
},
}, nil)
f([]prompbmarshal.Label{
{
Name: "__meta_foo",
Value: "bdffr",
},
{
Name: "foo",
Value: "bar",
},
{
Name: "__meta_xxx",
Value: "basd",
},
}, []prompbmarshal.Label{
{
Name: "foo",
Value: "bar",
},
})
}
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