Adding upstream version 1.34.4.
Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
parent
e393c3af3f
commit
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GPG key ID:
FBB4F0E80A80222F
4963 changed files with 677545 additions and 0 deletions
603
plugins/parsers/grok/parser.go
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603
plugins/parsers/grok/parser.go
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package grok
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import (
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"bufio"
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"bytes"
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"errors"
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"fmt"
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"os"
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"regexp"
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"strconv"
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"strings"
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"time"
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"github.com/vjeantet/grok"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/internal"
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"github.com/influxdata/telegraf/metric"
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"github.com/influxdata/telegraf/plugins/parsers"
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)
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var timeLayouts = map[string]string{
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"ts-ansic": "Mon Jan _2 15:04:05 2006",
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"ts-unix": "Mon Jan _2 15:04:05 MST 2006",
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"ts-ruby": "Mon Jan 02 15:04:05 -0700 2006",
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"ts-rfc822": "02 Jan 06 15:04 MST",
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"ts-rfc822z": "02 Jan 06 15:04 -0700", // RFC822 with numeric zone
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"ts-rfc850": "Monday, 02-Jan-06 15:04:05 MST",
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"ts-rfc1123": "Mon, 02 Jan 2006 15:04:05 MST",
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"ts-rfc1123z": "Mon, 02 Jan 2006 15:04:05 -0700", // RFC1123 with numeric zone
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"ts-rfc3339": "2006-01-02T15:04:05Z07:00",
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"ts-rfc3339nano": "2006-01-02T15:04:05.999999999Z07:00",
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"ts-httpd": "02/Jan/2006:15:04:05 -0700",
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// These four are not exactly "layouts", but they are special cases that
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// will get handled in the ParseLine function.
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"ts-epoch": "EPOCH",
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"ts-epochnano": "EPOCH_NANO",
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"ts-epochmilli": "EPOCH_MILLI",
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"ts-syslog": "SYSLOG_TIMESTAMP",
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"ts": "GENERIC_TIMESTAMP", // try parsing all known timestamp layouts.
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}
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const (
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Measurement = "measurement"
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Int = "int"
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Tag = "tag"
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Float = "float"
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String = "string"
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Duration = "duration"
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Drop = "drop"
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Epoch = "EPOCH"
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EpochMilli = "EPOCH_MILLI"
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EpochNano = "EPOCH_NANO"
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SyslogTimestamp = "SYSLOG_TIMESTAMP"
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GenericTimestamp = "GENERIC_TIMESTAMP"
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)
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var (
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// matches named captures that contain a modifier.
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// ie,
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// %{NUMBER:bytes:int}
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// %{IPORHOST:clientip:tag}
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// %{HTTPDATE:ts1:ts-http}
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// %{HTTPDATE:ts2:ts-"02 Jan 06 15:04"}
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modifierRe = regexp.MustCompile(`%{\w+:(\w+):(ts-".+"|t?s?-?\w+)}`)
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// matches a plain pattern name. ie, %{NUMBER}
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patternOnlyRe = regexp.MustCompile(`%{(\w+)}`)
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)
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// Parser is the primary struct to handle and grok-patterns defined in the config toml
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type Parser struct {
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Patterns []string `toml:"grok_patterns"`
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// namedPatterns is a list of internally-assigned names to the patterns
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// specified by the user in Patterns.
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// They will look like:
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// GROK_INTERNAL_PATTERN_0, GROK_INTERNAL_PATTERN_1, etc.
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NamedPatterns []string `toml:"grok_named_patterns"`
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CustomPatterns string `toml:"grok_custom_patterns"`
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CustomPatternFiles []string `toml:"grok_custom_pattern_files"`
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Multiline bool `toml:"grok_multiline"`
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Measurement string `toml:"-"`
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DefaultTags map[string]string `toml:"-"`
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Log telegraf.Logger `toml:"-"`
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// Timezone is an optional component to help render log dates to
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// your chosen zone.
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// Default: "" which renders UTC
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// Options are as follows:
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// 1. Local -- interpret based on machine localtime
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// 2. "America/Chicago" -- Unix TZ values like those found in https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
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// 3. UTC -- or blank/unspecified, will return timestamp in UTC
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Timezone string `toml:"grok_timezone"`
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loc *time.Location
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// UniqueTimestamp when set to "disable", timestamp will not incremented if there is a duplicate.
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UniqueTimestamp string `toml:"grok_unique_timestamp"`
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// typeMap is a map of patterns -> capture name -> modifier,
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// ie, {
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// "%{TESTLOG}":
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// {
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// "bytes": "int",
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// "clientip": "tag"
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// }
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// }
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typeMap map[string]map[string]string
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// tsMap is a map of patterns -> capture name -> timestamp layout.
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// ie, {
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// "%{TESTLOG}":
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// {
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// "httptime": "02/Jan/2006:15:04:05 -0700"
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// }
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// }
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tsMap map[string]map[string]string
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// patternsMap is a map of all of the parsed patterns from CustomPatterns
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// and CustomPatternFiles.
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// ie, {
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// "DURATION": "%{NUMBER}[nuµm]?s"
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// "RESPONSE_CODE": "%{NUMBER:rc:tag}"
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// }
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patternsMap map[string]string
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// foundTSLayouts is a slice of timestamp patterns that have been found
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// in the log lines. This slice gets updated if the user uses the generic
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// 'ts' modifier for timestamps. This slice is checked first for matches,
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// so that previously-matched layouts get priority over all other timestamp
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// layouts.
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foundTSLayouts []string
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timeFunc func() time.Time
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g *grok.Grok
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tsModder *tsModder
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}
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// Compile is a bound method to Parser which will process the options for our parser
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func (p *Parser) Compile() error {
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p.typeMap = make(map[string]map[string]string)
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p.tsMap = make(map[string]map[string]string)
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p.patternsMap = make(map[string]string)
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p.tsModder = &tsModder{}
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var err error
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p.g, err = grok.NewWithConfig(&grok.Config{NamedCapturesOnly: true})
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if err != nil {
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return err
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}
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if p.UniqueTimestamp == "" {
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p.UniqueTimestamp = "auto"
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}
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// Give Patterns fake names so that they can be treated as named
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// "custom patterns"
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p.NamedPatterns = make([]string, 0, len(p.Patterns))
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for i, pattern := range p.Patterns {
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pattern = strings.TrimSpace(pattern)
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if pattern == "" {
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continue
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}
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name := fmt.Sprintf("GROK_INTERNAL_PATTERN_%d", i)
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p.CustomPatterns += "\n" + name + " " + pattern + "\n"
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p.NamedPatterns = append(p.NamedPatterns, "%{"+name+"}")
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}
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if len(p.NamedPatterns) == 0 {
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return errors.New("pattern required")
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}
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// Combine user-supplied CustomPatterns with DEFAULT_PATTERNS and parse
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// them together as the same type of pattern.
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p.CustomPatterns = DefaultPatterns + p.CustomPatterns
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if len(p.CustomPatterns) != 0 {
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scanner := bufio.NewScanner(strings.NewReader(p.CustomPatterns))
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p.addCustomPatterns(scanner)
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}
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// Parse any custom pattern files supplied.
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for _, filename := range p.CustomPatternFiles {
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file, fileErr := os.Open(filename)
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if fileErr != nil {
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return fileErr
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}
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scanner := bufio.NewScanner(bufio.NewReader(file))
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p.addCustomPatterns(scanner)
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}
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p.loc, err = time.LoadLocation(p.Timezone)
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if err != nil {
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p.Log.Warnf("Improper timezone supplied (%s), setting loc to UTC", p.Timezone)
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p.loc = time.UTC
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}
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if p.timeFunc == nil {
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p.timeFunc = time.Now
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}
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return p.compileCustomPatterns()
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}
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// ParseLine is the primary function to process individual lines, returning the metrics
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func (p *Parser) ParseLine(line string) (telegraf.Metric, error) {
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var err error
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// values are the parsed fields from the log line
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var values map[string]string
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// the matching pattern string
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var patternName string
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for _, pattern := range p.NamedPatterns {
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if values, err = p.g.Parse(pattern, line); err != nil {
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return nil, err
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}
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if len(values) != 0 {
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patternName = pattern
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break
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}
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}
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if len(values) == 0 {
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p.Log.Debugf("Grok no match found for or no data extracted from: %q", line)
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return nil, nil
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}
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fields := make(map[string]interface{})
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tags := make(map[string]string)
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// add default tags
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for k, v := range p.DefaultTags {
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tags[k] = v
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}
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timestamp := time.Now()
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for k, v := range values {
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if k == "" || v == "" {
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continue
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}
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// t is the modifier of the field
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var t string
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// check if pattern has some modifiers
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if types, ok := p.typeMap[patternName]; ok {
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t = types[k]
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}
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// if we didn't find a modifier, check if we have a timestamp layout
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if t == "" {
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if ts, ok := p.tsMap[patternName]; ok {
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// check if the modifier is a timestamp layout
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if layout, ok := ts[k]; ok {
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t = layout
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}
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}
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}
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// if we didn't find a type OR timestamp modifier, assume string
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if t == "" {
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t = String
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}
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switch t {
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case Measurement:
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p.Measurement = v
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case Int:
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iv, err := strconv.ParseInt(v, 0, 64)
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if err != nil {
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p.Log.Errorf("Error parsing %s to int: %s", v, err)
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} else {
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fields[k] = iv
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}
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case Float:
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fv, err := strconv.ParseFloat(v, 64)
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if err != nil {
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p.Log.Errorf("Error parsing %s to float: %s", v, err)
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} else {
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fields[k] = fv
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}
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case Duration:
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d, err := time.ParseDuration(v)
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if err != nil {
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p.Log.Errorf("Error parsing %s to duration: %s", v, err)
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} else {
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fields[k] = int64(d)
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}
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case Tag:
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tags[k] = v
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case String:
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fields[k] = v
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case Epoch:
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parts := strings.SplitN(v, ".", 2)
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if len(parts) == 0 {
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p.Log.Errorf("Error parsing %s to timestamp: %s", v, err)
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break
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}
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sec, err := strconv.ParseInt(parts[0], 10, 64)
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if err != nil {
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p.Log.Errorf("Error parsing %s to timestamp: %s", v, err)
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break
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}
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ts := time.Unix(sec, 0)
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if len(parts) == 2 {
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padded := fmt.Sprintf("%-9s", parts[1])
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nsString := strings.ReplaceAll(padded[:9], " ", "0")
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nanosec, err := strconv.ParseInt(nsString, 10, 64)
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if err != nil {
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p.Log.Errorf("Error parsing %s to timestamp: %s", v, err)
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break
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}
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ts = ts.Add(time.Duration(nanosec) * time.Nanosecond)
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}
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timestamp = ts
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case EpochMilli:
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ms, err := strconv.ParseInt(v, 10, 64)
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if err != nil {
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p.Log.Errorf("Error parsing %s to int: %s", v, err)
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} else {
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timestamp = time.Unix(0, ms*int64(time.Millisecond))
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}
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case EpochNano:
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iv, err := strconv.ParseInt(v, 10, 64)
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if err != nil {
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p.Log.Errorf("Error parsing %s to int: %s", v, err)
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} else {
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timestamp = time.Unix(0, iv)
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}
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case SyslogTimestamp:
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ts, err := internal.ParseTimestamp(time.Stamp, v, p.loc)
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if err == nil {
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if ts.Year() == 0 {
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ts = ts.AddDate(timestamp.Year(), 0, 0)
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}
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timestamp = ts
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} else {
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p.Log.Errorf("Error parsing %s to time layout [%s]: %s", v, t, err)
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}
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case GenericTimestamp:
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var foundTS bool
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// first try timestamp layouts that we've already found
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for _, layout := range p.foundTSLayouts {
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ts, err := internal.ParseTimestamp(layout, v, p.loc)
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if err == nil {
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timestamp = ts
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foundTS = true
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break
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}
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}
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// if we haven't found a timestamp layout yet, try all timestamp
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// layouts.
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if !foundTS {
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for _, layout := range timeLayouts {
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ts, err := internal.ParseTimestamp(layout, v, p.loc)
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if err == nil {
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timestamp = ts
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foundTS = true
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p.foundTSLayouts = append(p.foundTSLayouts, layout)
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break
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}
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}
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}
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// if we still haven't found a timestamp layout, log it and we will
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// just use time.Now()
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if !foundTS {
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p.Log.Errorf("Error parsing timestamp [%s], could not find any "+
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"suitable time layouts.", v)
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}
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case Drop:
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// goodbye!
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default:
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v = strings.ReplaceAll(v, ",", ".")
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ts, err := internal.ParseTimestamp(t, v, p.loc)
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if err == nil {
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if ts.Year() == 0 {
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ts = ts.AddDate(timestamp.Year(), 0, 0)
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}
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timestamp = ts
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} else {
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p.Log.Errorf("Error parsing %s to time layout [%s]: %s", v, t, err)
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}
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}
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}
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if p.UniqueTimestamp != "auto" {
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return metric.New(p.Measurement, tags, fields, timestamp), nil
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}
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return metric.New(p.Measurement, tags, fields, p.tsModder.tsMod(timestamp)), nil
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}
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func (p *Parser) Parse(buf []byte) ([]telegraf.Metric, error) {
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metrics := make([]telegraf.Metric, 0)
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if p.Multiline {
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m, err := p.ParseLine(string(buf))
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if err != nil {
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return nil, err
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}
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if m != nil {
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metrics = append(metrics, m)
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}
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return metrics, nil
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}
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scanner := bufio.NewScanner(bytes.NewReader(buf))
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for scanner.Scan() {
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line := scanner.Text()
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m, err := p.ParseLine(line)
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if err != nil {
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return nil, err
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}
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if m == nil {
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continue
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}
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metrics = append(metrics, m)
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}
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return metrics, nil
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}
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func (p *Parser) SetDefaultTags(tags map[string]string) {
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p.DefaultTags = tags
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}
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func (p *Parser) addCustomPatterns(scanner *bufio.Scanner) {
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for scanner.Scan() {
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line := strings.TrimSpace(scanner.Text())
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if len(line) > 0 && line[0] != '#' {
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names := strings.SplitN(line, " ", 2)
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p.patternsMap[names[0]] = names[1]
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}
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}
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}
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func (p *Parser) compileCustomPatterns() error {
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var err error
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// check if the pattern contains a subpattern that is already defined
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// replace it with the subpattern for modifier inheritance.
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for i := 0; i < 2; i++ {
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for name, pattern := range p.patternsMap {
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subNames := patternOnlyRe.FindAllStringSubmatch(pattern, -1)
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for _, subName := range subNames {
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if subPattern, ok := p.patternsMap[subName[1]]; ok {
|
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pattern = strings.Replace(pattern, subName[0], subPattern, 1)
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}
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}
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p.patternsMap[name] = pattern
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}
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}
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|
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// check if pattern contains modifiers. Parse them out if it does.
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for name, pattern := range p.patternsMap {
|
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if modifierRe.MatchString(pattern) {
|
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// this pattern has modifiers, so parse out the modifiers
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pattern, err = p.parseTypedCaptures(name, pattern)
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if err != nil {
|
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return err
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}
|
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p.patternsMap[name] = pattern
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}
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}
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return p.g.AddPatternsFromMap(p.patternsMap)
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}
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|
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// parseTypedCaptures parses the capture modifiers, and then deletes the
|
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// modifier from the line so that it is a valid "grok" pattern again.
|
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//
|
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// ie,
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// %{NUMBER:bytes:int} => %{NUMBER:bytes} (stores %{NUMBER}->bytes->int)
|
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// %{IPORHOST:clientip:tag} => %{IPORHOST:clientip} (stores %{IPORHOST}->clientip->tag)
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func (p *Parser) parseTypedCaptures(name, pattern string) (string, error) {
|
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matches := modifierRe.FindAllStringSubmatch(pattern, -1)
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|
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// grab the name of the capture pattern
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patternName := "%{" + name + "}"
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// create type map for this pattern
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||||
p.typeMap[patternName] = make(map[string]string)
|
||||
p.tsMap[patternName] = make(map[string]string)
|
||||
|
||||
// boolean to verify that each pattern only has a single ts- data type.
|
||||
hasTimestamp := false
|
||||
for _, match := range matches {
|
||||
// regex capture 1 is the name of the capture
|
||||
// regex capture 2 is the modifier of the capture
|
||||
if strings.HasPrefix(match[2], "ts") {
|
||||
if hasTimestamp {
|
||||
return pattern, fmt.Errorf("logparser pattern compile error: "+
|
||||
"Each pattern is allowed only one named "+
|
||||
"timestamp data type. pattern: %s", pattern)
|
||||
}
|
||||
if layout, ok := timeLayouts[match[2]]; ok {
|
||||
// built-in time format
|
||||
p.tsMap[patternName][match[1]] = layout
|
||||
} else {
|
||||
// custom time format
|
||||
p.tsMap[patternName][match[1]] = strings.TrimSuffix(strings.TrimPrefix(match[2], `ts-"`), `"`)
|
||||
}
|
||||
hasTimestamp = true
|
||||
} else {
|
||||
p.typeMap[patternName][match[1]] = match[2]
|
||||
}
|
||||
|
||||
// the modifier is not a valid part of a "grok" pattern, so remove it
|
||||
// from the pattern.
|
||||
pattern = strings.Replace(pattern, ":"+match[2]+"}", "}", 1)
|
||||
}
|
||||
|
||||
return pattern, nil
|
||||
}
|
||||
|
||||
// tsModder is a struct for incrementing identical timestamps of log lines
|
||||
// so that we don't push identical metrics that will get overwritten.
|
||||
type tsModder struct {
|
||||
dupe time.Time
|
||||
last time.Time
|
||||
incr time.Duration
|
||||
incrn time.Duration
|
||||
rollover time.Duration
|
||||
}
|
||||
|
||||
// tsMod increments the given timestamp one unit more from the previous
|
||||
// duplicate timestamp.
|
||||
// the increment unit is determined as the next smallest time unit below the
|
||||
// most significant time unit of ts.
|
||||
//
|
||||
// ie, if the input is at ms precision, it will increment it 1µs.
|
||||
func (t *tsModder) tsMod(ts time.Time) time.Time {
|
||||
if ts.IsZero() {
|
||||
return ts
|
||||
}
|
||||
defer func() { t.last = ts }()
|
||||
// don't mod the time if we don't need to
|
||||
if t.last.IsZero() || ts.IsZero() {
|
||||
t.incrn = 0
|
||||
t.rollover = 0
|
||||
return ts
|
||||
}
|
||||
if !ts.Equal(t.last) && !ts.Equal(t.dupe) {
|
||||
t.incr = 0
|
||||
t.incrn = 0
|
||||
t.rollover = 0
|
||||
return ts
|
||||
}
|
||||
if ts.Equal(t.last) {
|
||||
t.dupe = ts
|
||||
}
|
||||
|
||||
if ts.Equal(t.dupe) && t.incr == time.Duration(0) {
|
||||
tsNano := ts.UnixNano()
|
||||
|
||||
d := int64(10)
|
||||
counter := 1
|
||||
for {
|
||||
a := tsNano % d
|
||||
if a > 0 {
|
||||
break
|
||||
}
|
||||
d = d * 10
|
||||
counter++
|
||||
}
|
||||
|
||||
switch {
|
||||
case counter <= 6:
|
||||
t.incr = time.Nanosecond
|
||||
case counter <= 9:
|
||||
t.incr = time.Microsecond
|
||||
case counter > 9:
|
||||
t.incr = time.Millisecond
|
||||
}
|
||||
}
|
||||
|
||||
t.incrn++
|
||||
if t.incrn == 999 && t.incr > time.Nanosecond {
|
||||
t.rollover = t.incr * t.incrn
|
||||
t.incrn = 1
|
||||
t.incr = t.incr / 1000
|
||||
if t.incr < time.Nanosecond {
|
||||
t.incr = time.Nanosecond
|
||||
}
|
||||
}
|
||||
return ts.Add(t.incr*t.incrn + t.rollover)
|
||||
}
|
||||
|
||||
func (p *Parser) Init() error {
|
||||
if len(p.Patterns) == 0 {
|
||||
p.Patterns = []string{"%{COMBINED_LOG_FORMAT}"}
|
||||
}
|
||||
|
||||
if p.UniqueTimestamp == "" {
|
||||
p.UniqueTimestamp = "auto"
|
||||
}
|
||||
|
||||
if p.Timezone == "" {
|
||||
p.Timezone = "UTC"
|
||||
}
|
||||
|
||||
return p.Compile()
|
||||
}
|
||||
|
||||
func init() {
|
||||
parsers.Add("grok",
|
||||
func(defaultMetricName string) telegraf.Parser {
|
||||
return &Parser{
|
||||
Measurement: defaultMetricName,
|
||||
}
|
||||
},
|
||||
)
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue