mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-01 14:47:38 +00:00
304512b668
On templates validation stage vmalert does not acutally send queries, so for complex chained expression validation may fail. To avoid this, we add a blank sample in response so validation can pass successfully. Later, during the rule execution, stub will be replaced with real `query` function. https://github.com/VictoriaMetrics/VictoriaMetrics/issues/989
223 lines
6.2 KiB
Go
223 lines
6.2 KiB
Go
// Copyright 2013 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package notifier
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"math"
|
|
"net/url"
|
|
"regexp"
|
|
"strings"
|
|
"time"
|
|
|
|
htmlTpl "html/template"
|
|
textTpl "text/template"
|
|
|
|
"github.com/VictoriaMetrics/VictoriaMetrics/app/vmalert/datasource"
|
|
)
|
|
|
|
// QueryFn is used to wrap a call to datasource into simple-to-use function
|
|
// for templating functions.
|
|
type QueryFn func(query string) ([]datasource.Metric, error)
|
|
|
|
func funcsWithQuery(query QueryFn) textTpl.FuncMap {
|
|
fm := make(textTpl.FuncMap)
|
|
for k, fn := range tmplFunc {
|
|
fm[k] = fn
|
|
}
|
|
fm["query"] = func(q string) ([]datasource.Metric, error) {
|
|
return query(q)
|
|
}
|
|
return fm
|
|
}
|
|
|
|
var tmplFunc textTpl.FuncMap
|
|
|
|
// InitTemplateFunc initiates template helper functions
|
|
func InitTemplateFunc(externalURL *url.URL) {
|
|
tmplFunc = textTpl.FuncMap{
|
|
"args": func(args ...interface{}) map[string]interface{} {
|
|
result := make(map[string]interface{})
|
|
for i, a := range args {
|
|
result[fmt.Sprintf("arg%d", i)] = a
|
|
}
|
|
return result
|
|
},
|
|
"reReplaceAll": func(pattern, repl, text string) string {
|
|
re := regexp.MustCompile(pattern)
|
|
return re.ReplaceAllString(text, repl)
|
|
},
|
|
"safeHtml": func(text string) htmlTpl.HTML {
|
|
return htmlTpl.HTML(text)
|
|
},
|
|
"match": regexp.MatchString,
|
|
"title": strings.Title,
|
|
"toUpper": strings.ToUpper,
|
|
"toLower": strings.ToLower,
|
|
"humanize": func(v float64) string {
|
|
if v == 0 || math.IsNaN(v) || math.IsInf(v, 0) {
|
|
return fmt.Sprintf("%.4g", v)
|
|
}
|
|
if math.Abs(v) >= 1 {
|
|
prefix := ""
|
|
for _, p := range []string{"k", "M", "G", "T", "P", "E", "Z", "Y"} {
|
|
if math.Abs(v) < 1000 {
|
|
break
|
|
}
|
|
prefix = p
|
|
v /= 1000
|
|
}
|
|
return fmt.Sprintf("%.4g%s", v, prefix)
|
|
}
|
|
prefix := ""
|
|
for _, p := range []string{"m", "u", "n", "p", "f", "a", "z", "y"} {
|
|
if math.Abs(v) >= 1 {
|
|
break
|
|
}
|
|
prefix = p
|
|
v *= 1000
|
|
}
|
|
return fmt.Sprintf("%.4g%s", v, prefix)
|
|
},
|
|
"humanize1024": func(v float64) string {
|
|
if math.Abs(v) <= 1 || math.IsNaN(v) || math.IsInf(v, 0) {
|
|
return fmt.Sprintf("%.4g", v)
|
|
}
|
|
prefix := ""
|
|
for _, p := range []string{"ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi"} {
|
|
if math.Abs(v) < 1024 {
|
|
break
|
|
}
|
|
prefix = p
|
|
v /= 1024
|
|
}
|
|
return fmt.Sprintf("%.4g%s", v, prefix)
|
|
},
|
|
"humanizeDuration": func(v float64) string {
|
|
if math.IsNaN(v) || math.IsInf(v, 0) {
|
|
return fmt.Sprintf("%.4g", v)
|
|
}
|
|
if v == 0 {
|
|
return fmt.Sprintf("%.4gs", v)
|
|
}
|
|
if math.Abs(v) >= 1 {
|
|
sign := ""
|
|
if v < 0 {
|
|
sign = "-"
|
|
v = -v
|
|
}
|
|
seconds := int64(v) % 60
|
|
minutes := (int64(v) / 60) % 60
|
|
hours := (int64(v) / 60 / 60) % 24
|
|
days := int64(v) / 60 / 60 / 24
|
|
// For days to minutes, we display seconds as an integer.
|
|
if days != 0 {
|
|
return fmt.Sprintf("%s%dd %dh %dm %ds", sign, days, hours, minutes, seconds)
|
|
}
|
|
if hours != 0 {
|
|
return fmt.Sprintf("%s%dh %dm %ds", sign, hours, minutes, seconds)
|
|
}
|
|
if minutes != 0 {
|
|
return fmt.Sprintf("%s%dm %ds", sign, minutes, seconds)
|
|
}
|
|
// For seconds, we display 4 significant digits.
|
|
return fmt.Sprintf("%s%.4gs", sign, v)
|
|
}
|
|
prefix := ""
|
|
for _, p := range []string{"m", "u", "n", "p", "f", "a", "z", "y"} {
|
|
if math.Abs(v) >= 1 {
|
|
break
|
|
}
|
|
prefix = p
|
|
v *= 1000
|
|
}
|
|
return fmt.Sprintf("%.4g%ss", v, prefix)
|
|
},
|
|
"humanizePercentage": func(v float64) string {
|
|
return fmt.Sprintf("%.4g%%", v*100)
|
|
},
|
|
"humanizeTimestamp": func(v float64) string {
|
|
if math.IsNaN(v) || math.IsInf(v, 0) {
|
|
return fmt.Sprintf("%.4g", v)
|
|
}
|
|
t := TimeFromUnixNano(int64(v * 1e9)).Time().UTC()
|
|
return fmt.Sprint(t)
|
|
},
|
|
"pathPrefix": func() string {
|
|
return externalURL.Path
|
|
},
|
|
"externalURL": func() string {
|
|
return externalURL.String()
|
|
},
|
|
"pathEscape": func(u string) string {
|
|
return url.PathEscape(u)
|
|
},
|
|
"queryEscape": func(q string) string {
|
|
return url.QueryEscape(q)
|
|
},
|
|
"crlfEscape": func(q string) string {
|
|
q = strings.Replace(q, "\n", `\n`, -1)
|
|
return strings.Replace(q, "\r", `\r`, -1)
|
|
},
|
|
"quotesEscape": func(q string) string {
|
|
return strings.Replace(q, `"`, `\"`, -1)
|
|
},
|
|
// query function supposed to be substituted at funcsWithQuery().
|
|
// it is present here only for validation purposes, when there is no
|
|
// provided datasource.
|
|
"query": func(q string) ([]datasource.Metric, error) {
|
|
// return non-empty slice to pass validation with chained functions in template
|
|
// see issue #989 for details
|
|
return []datasource.Metric{{}}, nil
|
|
},
|
|
"first": func(metrics []datasource.Metric) (datasource.Metric, error) {
|
|
if len(metrics) > 0 {
|
|
return metrics[0], nil
|
|
}
|
|
return datasource.Metric{}, errors.New("first() called on vector with no elements")
|
|
},
|
|
"label": func(label string, m datasource.Metric) string {
|
|
return m.Label(label)
|
|
},
|
|
"value": func(m datasource.Metric) float64 {
|
|
return m.Value
|
|
},
|
|
}
|
|
}
|
|
|
|
// Time is the number of milliseconds since the epoch
|
|
// (1970-01-01 00:00 UTC) excluding leap seconds.
|
|
type Time int64
|
|
|
|
// TimeFromUnixNano returns the Time equivalent to the Unix Time
|
|
// t provided in nanoseconds.
|
|
func TimeFromUnixNano(t int64) Time {
|
|
return Time(t / nanosPerTick)
|
|
}
|
|
|
|
// The number of nanoseconds per minimum tick.
|
|
const nanosPerTick = int64(minimumTick / time.Nanosecond)
|
|
|
|
// MinimumTick is the minimum supported time resolution. This has to be
|
|
// at least time.Second in order for the code below to work.
|
|
const minimumTick = time.Millisecond
|
|
|
|
// second is the Time duration equivalent to one second.
|
|
const second = int64(time.Second / minimumTick)
|
|
|
|
// Time returns the time.Time representation of t.
|
|
func (t Time) Time() time.Time {
|
|
return time.Unix(int64(t)/second, (int64(t)%second)*nanosPerTick)
|
|
}
|