195 lines
3.6 KiB
Go
195 lines
3.6 KiB
Go
package jolokia
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import (
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"encoding/json"
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"errors"
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"fmt"
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"io/ioutil"
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"net/http"
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// "net/url"
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"strings"
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// "sync"
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"github.com/influxdb/telegraf/plugins"
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)
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type Server struct {
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Name string
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Host string
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Port string
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}
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type Metric struct {
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Name string
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Jmx string
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Pass []string
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Drop []string
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}
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type Jolokia struct {
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Context string
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Servers []Server
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Metrics []Metric
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Tags map[string]string
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}
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func (j *Jolokia) SampleConfig() string {
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return `[jolokia]
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context = "/jolokia/read"
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[[jolokia.tags]]
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group = "as"
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[[jolokia.servers]]
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name = "stable"
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host = "192.168.103.2"
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port = "8180"
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[[jolokia.metrics]]
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name = "heap_memory_usage"
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jmx = "/java.lang:type=Memory/HeapMemoryUsage"
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pass = ["used"]
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[[jolokia.metrics]]
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name = "memory_eden"
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jmx = "/java.lang:type=MemoryPool,name=PS Eden Space/Usage"
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pass = ["used"]
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[[jolokia.metrics]]
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name = "heap_threads"
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jmx = "/java.lang:type=Threading"
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# drop = ["AllThread"]
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pass = ["CurrentThreadCpuTime","CurrentThreadUserTime","DaemonThreadCount","ThreadCount","TotalStartedThreadCount"]
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`
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}
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func (j *Jolokia) Description() string {
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return "Read JMX metrics through Jolokia"
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}
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func getAttr(url string) (map[string]interface{}, error) {
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//make request
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resp, err := http.Get(url)
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if err != nil {
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return nil, err
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}
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defer resp.Body.Close()
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// Process response
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if resp.StatusCode != http.StatusOK {
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err = fmt.Errorf("Response from url \"%s\" has status code %d (%s), expected %d (%s)",
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url,
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resp.StatusCode,
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http.StatusText(resp.StatusCode),
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http.StatusOK,
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http.StatusText(http.StatusOK))
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return nil, err
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}
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// read body
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return nil, err
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}
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// Unmarshal json
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var jsonOut map[string]interface{}
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if err = json.Unmarshal([]byte(body), &jsonOut); err != nil {
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return nil, errors.New("Error decoding JSON response")
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}
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return jsonOut, nil
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}
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func (m *Metric) shouldPass(field string) bool {
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if m.Pass != nil {
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for _, pass := range m.Pass{
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if strings.HasPrefix(field, pass) {
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return true
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}
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}
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return false
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}
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if m.Drop != nil {
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for _, drop := range m.Drop{
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if strings.HasPrefix(field, drop) {
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return false
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}
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}
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return true
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}
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return true
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}
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func (m *Metric) filterFields(fields map[string]interface{}) map[string]interface{} {
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for field, _ := range fields{
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if !m.shouldPass(field) {
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delete(fields, field)
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}
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}
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return fields
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}
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func (j *Jolokia) Gather(acc plugins.Accumulator) error {
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context := j.Context //"/jolokia/read"
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servers := j.Servers
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metrics := j.Metrics
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tags := j.Tags
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if tags == nil{
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tags = map[string]string{}
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}
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for _, server := range servers {
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for _, metric := range metrics {
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measurement := metric.Name
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jmxPath := metric.Jmx
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tags["server"] = server.Name
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tags["port"] = server.Port
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tags["host"] = server.Host
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url := "http://" + server.Host + ":" + server.Port + context + jmxPath
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//fmt.Println(url)
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out, _ := getAttr(url)
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if values, ok := out["value"]; ok {
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switch values.(type) {
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case map[string]interface{}:
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acc.AddFields(measurement, metric.filterFields(values.(map[string]interface{})), tags)
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case interface{}:
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acc.Add(measurement, values.(interface{}), tags)
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}
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}else{
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fmt.Printf("Missing key 'value' in '%s' output response\n", url)
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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 init() {
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plugins.Add("jolokia", func() plugins.Plugin {
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return &Jolokia{}
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})
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}
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