122 lines
2.4 KiB
Go
122 lines
2.4 KiB
Go
package filestat
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import (
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"crypto/md5"
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"fmt"
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"io"
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"os"
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"github.com/influxdata/telegraf"
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"github.com/influxdata/telegraf/internal/globpath"
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"github.com/influxdata/telegraf/plugins/inputs"
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)
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const sampleConfig = `
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## Files to gather stats about.
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## These accept standard unix glob matching rules, but with the addition of
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## ** as a "super asterisk". See https://github.com/gobwas/glob.
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files = ["/etc/telegraf/telegraf.conf", "/var/log/**.log"]
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## If true, read the entire file and calculate an md5 checksum.
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md5 = false
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`
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type FileStat struct {
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Md5 bool
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Files []string
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// maps full file paths to globmatch obj
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globs map[string]*globpath.GlobPath
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}
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func NewFileStat() *FileStat {
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return &FileStat{
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globs: make(map[string]*globpath.GlobPath),
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}
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}
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func (_ *FileStat) Description() string {
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return "Read stats about given file(s)"
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}
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func (_ *FileStat) SampleConfig() string { return sampleConfig }
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func (f *FileStat) Gather(acc telegraf.Accumulator) error {
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var errS string
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var err error
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for _, filepath := range f.Files {
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// Get the compiled glob object for this filepath
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g, ok := f.globs[filepath]
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if !ok {
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if g, err = globpath.Compile(filepath); err != nil {
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errS += err.Error() + " "
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continue
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}
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f.globs[filepath] = g
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}
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for _, file := range g.Match() {
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tags := map[string]string{
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"file": file,
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}
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fields := map[string]interface{}{
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"exists": int64(0),
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}
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// Get file stats
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fileInfo, err := os.Stat(file)
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if os.IsNotExist(err) {
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// file doesn't exist, so move on to the next
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acc.AddFields("filestat", fields, tags)
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continue
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}
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if err != nil {
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errS += err.Error() + " "
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continue
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}
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// file exists and no errors encountered
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fields["exists"] = int64(1)
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fields["size_bytes"] = fileInfo.Size()
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if f.Md5 {
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md5, err := getMd5(file)
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if err != nil {
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errS += err.Error() + " "
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} else {
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fields["md5_sum"] = md5
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}
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}
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acc.AddFields("filestat", fields, tags)
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}
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}
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if errS != "" {
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return fmt.Errorf(errS)
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}
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return nil
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}
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// Read given file and calculate an md5 hash.
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func getMd5(file string) (string, error) {
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of, err := os.Open(file)
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if err != nil {
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return "", err
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}
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defer of.Close()
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hash := md5.New()
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_, err = io.Copy(hash, of)
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if err != nil {
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// fatal error
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return "", err
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}
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return fmt.Sprintf("%x", hash.Sum(nil)), nil
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}
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func init() {
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inputs.Add("filestat", func() telegraf.Input {
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return NewFileStat()
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})
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}
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