110 lines
3.7 KiB
Go
110 lines
3.7 KiB
Go
package inputs
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import (
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"errors"
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"fmt"
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"strconv"
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"strings"
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)
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// Tail is based on telegraf Tail plugin.
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type Tail struct {
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baseInput
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Files []string `json:"files"`
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}
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// PluginName is based on telegraf plugin name.
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func (t *Tail) PluginName() string {
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return "tail"
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}
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// TOML encodes to toml string
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func (t *Tail) TOML() string {
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s := make([]string, len(t.Files))
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for k, v := range t.Files {
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s[k] = strconv.Quote(v)
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}
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return fmt.Sprintf(`[[inputs.%s]]
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## File names or a pattern to tail.
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## These accept standard unix glob matching rules, but with the addition of
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## ** as a "super asterisk". ie:
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## "/var/log/**.log" -> recursively find all .log files in /var/log
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## "/var/log/*/*.log" -> find all .log files with a parent dir in /var/log
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## "/var/log/apache.log" -> just tail the apache log file
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## "/var/log/log[!1-2]* -> tail files without 1-2
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## "/var/log/log[^1-2]* -> identical behavior as above
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## See https://github.com/gobwas/glob for more examples
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##
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files = [%s]
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## Read file from beginning.
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# from_beginning = false
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## Whether file is a named pipe
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# pipe = false
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## Method used to watch for file updates. Can be either "inotify" or "poll".
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# watch_method = "inotify"
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## Maximum lines of the file to process that have not yet be written by the
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## output. For best throughput set based on the number of metrics on each
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## line and the size of the output's metric_batch_size.
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# max_undelivered_lines = 1000
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## Character encoding to use when interpreting the file contents. Invalid
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## characters are replaced using the unicode replacement character. When set
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## to the empty string the data is not decoded to text.
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## ex: character_encoding = "utf-8"
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## character_encoding = "utf-16le"
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## character_encoding = "utf-16be"
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## character_encoding = ""
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# character_encoding = ""
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## Data format to consume.
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## Each data format has its own unique set of configuration options, read
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## more about them here:
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## https://github.com/influxdata/telegraf/blob/master/docs/DATA_FORMATS_INPUT.md
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data_format = "influx"
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## Set the tag that will contain the path of the tailed file. If you don't want this tag, set it to an empty string.
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# path_tag = "path"
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## multiline parser/codec
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## https://www.elastic.co/guide/en/logstash/2.4/plugins-filters-multiline.html
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#[inputs.tail.multiline]
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## The pattern should be a regexp which matches what you believe to be an
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## indicator that the field is part of an event consisting of multiple lines of log data.
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#pattern = "^\s"
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## This field must be either "previous" or "next".
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## If a line matches the pattern, "previous" indicates that it belongs to the previous line,
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## whereas "next" indicates that the line belongs to the next one.
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#match_which_line = "previous"
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## The invert_match field can be true or false (defaults to false).
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## If true, a message not matching the pattern will constitute a match of the multiline
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## filter and the what will be applied. (vice-versa is also true)
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#invert_match = false
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## After the specified timeout, this plugin sends a multiline event even if no new pattern
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## is found to start a new event. The default timeout is 5s.
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#timeout = 5s
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`, t.PluginName(), strings.Join(s, ", "))
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}
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// UnmarshalTOML decodes the parsed data to the object
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func (t *Tail) UnmarshalTOML(data interface{}) error {
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dataOK, ok := data.(map[string]interface{})
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if !ok {
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return errors.New("bad files for tail input plugin")
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}
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files, ok := dataOK["files"].([]interface{})
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if !ok {
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return errors.New("not an array for tail input plugin")
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}
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for _, fi := range files {
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t.Files = append(t.Files, fi.(string))
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}
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return nil
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}
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