150 lines
3.6 KiB
Go
150 lines
3.6 KiB
Go
package apache
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import (
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"bufio"
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"fmt"
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"net"
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"net/http"
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"net/url"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/influxdb/telegraf/plugins"
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)
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type ApacheConf struct {
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Urls []string
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}
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var sampleConfig = `
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# An array of Apache status URI to gather stats.
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urls = ["http://localhost/server-status?auto"]`
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func (n *ApacheConf) SampleConfig() string {
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return sampleConfig
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}
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func (n *ApacheConf) Description() string {
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return "Read Apache status information (mod_status)"
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}
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func (n *ApacheConf) Gather(acc plugins.Accumulator) error {
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var wg sync.WaitGroup
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var outerr error
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for _, u := range n.Urls {
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addr, err := url.Parse(u)
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if err != nil {
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return fmt.Errorf("Unable to parse address '%s': %s", u, err)
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}
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wg.Add(1)
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go func(addr *url.URL) {
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defer wg.Done()
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outerr = n.gatherUrl(addr, acc)
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}(addr)
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}
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wg.Wait()
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return outerr
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}
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var tr = &http.Transport{
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ResponseHeaderTimeout: time.Duration(3 * time.Second),
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}
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var client = &http.Client{Transport: tr}
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func (n *ApacheConf) gatherUrl(addr *url.URL, acc plugins.Accumulator) error {
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resp, err := client.Get(addr.String())
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if err != nil {
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return fmt.Errorf("error making HTTP request to %s: %s", addr.String(), err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("%s returned HTTP status %s", addr.String(), resp.Status)
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}
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tags := getTags(addr)
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sc := bufio.NewScanner(resp.Body)
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for sc.Scan() {
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line := sc.Text()
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if strings.Contains(line, ":") {
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parts := strings.SplitN(line, ":", 2)
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key, part := strings.Replace(parts[0], " ", "", -1), strings.TrimSpace(parts[1])
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switch key {
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case "Scoreboard":
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n.gatherScores(part, acc)
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default:
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value, err := strconv.ParseFloat(part, 32)
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if err != nil {
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continue
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}
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acc.Add(key, value, tags)
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}
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}
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}
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return nil
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}
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func (n *Apache) gatherScores(data string, acc plugins.Accumulator, tags map[string]string) {
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var waiting, open int = 0, 0
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var S, R, W, K, D, C, L, G, I int = 0, 0, 0, 0, 0, 0, 0, 0, 0
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for _, s := range strings.Split(data, "") {
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switch s {
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case "_": waiting++
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case "S": S++
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case "R": R++
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case "W": W++
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case "K": K++
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case "D": D++
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case "C": C++
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case "L": L++
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case "G": G++
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case "I": I++
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case ".": open++
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}
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}
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acc.Add("scboard_waiting", float64(waiting), tags);
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acc.Add("scboard_starting", float64(S), tags);
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acc.Add("scboard_reading", float64(R), tags);
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acc.Add("scboard_sending", float64(W), tags);
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acc.Add("scboard_keepalive", float64(K), tags);
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acc.Add("scboard_dnslookup", float64(D), tags);
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acc.Add("scboard_closing", float64(C), tags);
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acc.Add("scboard_logging", float64(L), tags);
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acc.Add("scboard_finishing", float64(G), tags);
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acc.Add("scboard_idle_cleanup", float64(I), tags);
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acc.Add("scboard_open", float64(open), tags);
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}
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// Get tag(s) for the apache plugin
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func getTags(addr *url.URL) map[string]string {
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h := addr.Host
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var htag string
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if host, _, err := net.SplitHostPort(h); err == nil {
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htag = host
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} else {
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htag = h
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}
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return map[string]string{"server": htag}
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}
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func init() {
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plugins.Add("apache", func() plugins.Plugin {
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return &ApacheConf{}
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})
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}
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