telegraf/plugins/inputs/mesos/mesos.go

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package mesos
import (
"encoding/json"
"errors"
"io/ioutil"
"log"
"net"
"net/http"
"strconv"
"sync"
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"time"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/plugins/inputs"
jsonparser "github.com/influxdata/telegraf/plugins/parsers/json"
)
type Role string
const (
MASTER Role = "master"
SLAVE = "slave"
)
type Mesos struct {
Timeout int
Masters []string
MasterCols []string `toml:"master_collections"`
Slaves []string
SlaveCols []string `toml:"slave_collections"`
//SlaveTasks bool
}
var allMetrics = map[Role][]string{
MASTER: []string{"resources", "master", "system", "agents", "frameworks", "tasks", "messages", "evqueue", "registrar"},
SLAVE: []string{"resources", "agent", "system", "executors", "tasks", "messages"},
}
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var sampleConfig = `
## Timeout, in ms.
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timeout = 100
## A list of Mesos masters.
masters = ["localhost:5050"]
## Master metrics groups to be collected, by default, all enabled.
master_collections = [
"resources",
"master",
"system",
"agents",
"frameworks",
"tasks",
"messages",
"evqueue",
"registrar",
]
## A list of Mesos slaves, default is []
# slaves = []
## Slave metrics groups to be collected, by default, all enabled.
# slave_collections = [
# "resources",
# "agent",
# "system",
# "executors",
# "tasks",
# "messages",
# ]
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`
// SampleConfig returns a sample configuration block
func (m *Mesos) SampleConfig() string {
return sampleConfig
}
// Description just returns a short description of the Mesos plugin
func (m *Mesos) Description() string {
return "Telegraf plugin for gathering metrics from N Mesos masters"
}
func (m *Mesos) SetDefaults() {
if len(m.MasterCols) == 0 {
m.MasterCols = allMetrics[MASTER]
}
if len(m.SlaveCols) == 0 {
m.SlaveCols = allMetrics[SLAVE]
}
if m.Timeout == 0 {
log.Println("I! [mesos] Missing timeout value, setting default value (100ms)")
m.Timeout = 100
}
}
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// Gather() metrics from given list of Mesos Masters
func (m *Mesos) Gather(acc telegraf.Accumulator) error {
var wg sync.WaitGroup
m.SetDefaults()
for _, v := range m.Masters {
wg.Add(1)
go func(c string) {
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acc.AddError(m.gatherMainMetrics(c, ":5050", MASTER, acc))
wg.Done()
return
}(v)
}
for _, v := range m.Slaves {
wg.Add(1)
go func(c string) {
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acc.AddError(m.gatherMainMetrics(c, ":5051", SLAVE, acc))
wg.Done()
return
}(v)
// if !m.SlaveTasks {
// continue
// }
// wg.Add(1)
// go func(c string) {
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// acc.AddError(m.gatherSlaveTaskMetrics(c, ":5051", acc))
// wg.Done()
// return
// }(v)
}
wg.Wait()
return nil
}
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// metricsDiff() returns set names for removal
func metricsDiff(role Role, w []string) []string {
b := []string{}
s := make(map[string]bool)
if len(w) == 0 {
return b
}
for _, v := range w {
s[v] = true
}
for _, d := range allMetrics[role] {
if _, ok := s[d]; !ok {
b = append(b, d)
}
}
return b
}
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// masterBlocks serves as kind of metrics registry groupping them in sets
func getMetrics(role Role, group string) []string {
var m map[string][]string
m = make(map[string][]string)
if role == MASTER {
m["resources"] = []string{
"master/cpus_percent",
"master/cpus_used",
"master/cpus_total",
"master/cpus_revocable_percent",
"master/cpus_revocable_total",
"master/cpus_revocable_used",
"master/disk_percent",
"master/disk_used",
"master/disk_total",
"master/disk_revocable_percent",
"master/disk_revocable_total",
"master/disk_revocable_used",
"master/gpus_percent",
"master/gpus_used",
"master/gpus_total",
"master/gpus_revocable_percent",
"master/gpus_revocable_total",
"master/gpus_revocable_used",
"master/mem_percent",
"master/mem_used",
"master/mem_total",
"master/mem_revocable_percent",
"master/mem_revocable_total",
"master/mem_revocable_used",
}
m["master"] = []string{
"master/elected",
"master/uptime_secs",
}
m["system"] = []string{
"system/cpus_total",
"system/load_15min",
"system/load_5min",
"system/load_1min",
"system/mem_free_bytes",
"system/mem_total_bytes",
}
m["agents"] = []string{
"master/slave_registrations",
"master/slave_removals",
"master/slave_reregistrations",
"master/slave_shutdowns_scheduled",
"master/slave_shutdowns_canceled",
"master/slave_shutdowns_completed",
"master/slaves_active",
"master/slaves_connected",
"master/slaves_disconnected",
"master/slaves_inactive",
}
m["frameworks"] = []string{
"master/frameworks_active",
"master/frameworks_connected",
"master/frameworks_disconnected",
"master/frameworks_inactive",
"master/outstanding_offers",
}
m["tasks"] = []string{
"master/tasks_error",
"master/tasks_failed",
"master/tasks_finished",
"master/tasks_killed",
"master/tasks_lost",
"master/tasks_running",
"master/tasks_staging",
"master/tasks_starting",
}
m["messages"] = []string{
"master/invalid_executor_to_framework_messages",
"master/invalid_framework_to_executor_messages",
"master/invalid_status_update_acknowledgements",
"master/invalid_status_updates",
"master/dropped_messages",
"master/messages_authenticate",
"master/messages_deactivate_framework",
"master/messages_decline_offers",
"master/messages_executor_to_framework",
"master/messages_exited_executor",
"master/messages_framework_to_executor",
"master/messages_kill_task",
"master/messages_launch_tasks",
"master/messages_reconcile_tasks",
"master/messages_register_framework",
"master/messages_register_slave",
"master/messages_reregister_framework",
"master/messages_reregister_slave",
"master/messages_resource_request",
"master/messages_revive_offers",
"master/messages_status_update",
"master/messages_status_update_acknowledgement",
"master/messages_unregister_framework",
"master/messages_unregister_slave",
"master/messages_update_slave",
"master/recovery_slave_removals",
"master/slave_removals/reason_registered",
"master/slave_removals/reason_unhealthy",
"master/slave_removals/reason_unregistered",
"master/valid_framework_to_executor_messages",
"master/valid_status_update_acknowledgements",
"master/valid_status_updates",
"master/task_lost/source_master/reason_invalid_offers",
"master/task_lost/source_master/reason_slave_removed",
"master/task_lost/source_slave/reason_executor_terminated",
"master/valid_executor_to_framework_messages",
}
m["evqueue"] = []string{
"master/event_queue_dispatches",
"master/event_queue_http_requests",
"master/event_queue_messages",
}
m["registrar"] = []string{
"registrar/state_fetch_ms",
"registrar/state_store_ms",
"registrar/state_store_ms/max",
"registrar/state_store_ms/min",
"registrar/state_store_ms/p50",
"registrar/state_store_ms/p90",
"registrar/state_store_ms/p95",
"registrar/state_store_ms/p99",
"registrar/state_store_ms/p999",
"registrar/state_store_ms/p9999",
}
} else if role == SLAVE {
m["resources"] = []string{
"slave/cpus_percent",
"slave/cpus_used",
"slave/cpus_total",
"slave/cpus_revocable_percent",
"slave/cpus_revocable_total",
"slave/cpus_revocable_used",
"slave/disk_percent",
"slave/disk_used",
"slave/disk_total",
"slave/disk_revocable_percent",
"slave/disk_revocable_total",
"slave/disk_revocable_used",
"slave/gpus_percent",
"slave/gpus_used",
"slave/gpus_total",
"slave/gpus_revocable_percent",
"slave/gpus_revocable_total",
"slave/gpus_revocable_used",
"slave/mem_percent",
"slave/mem_used",
"slave/mem_total",
"slave/mem_revocable_percent",
"slave/mem_revocable_total",
"slave/mem_revocable_used",
}
m["agent"] = []string{
"slave/registered",
"slave/uptime_secs",
}
m["system"] = []string{
"system/cpus_total",
"system/load_15min",
"system/load_5min",
"system/load_1min",
"system/mem_free_bytes",
"system/mem_total_bytes",
}
m["executors"] = []string{
"containerizer/mesos/container_destroy_errors",
"slave/container_launch_errors",
"slave/executors_preempted",
"slave/frameworks_active",
"slave/executor_directory_max_allowed_age_secs",
"slave/executors_registering",
"slave/executors_running",
"slave/executors_terminated",
"slave/executors_terminating",
"slave/recovery_errors",
}
m["tasks"] = []string{
"slave/tasks_failed",
"slave/tasks_finished",
"slave/tasks_killed",
"slave/tasks_lost",
"slave/tasks_running",
"slave/tasks_staging",
"slave/tasks_starting",
}
m["messages"] = []string{
"slave/invalid_framework_messages",
"slave/invalid_status_updates",
"slave/valid_framework_messages",
"slave/valid_status_updates",
}
}
ret, ok := m[group]
if !ok {
log.Printf("I! [mesos] Unkown %s metrics group: %s\n", role, group)
return []string{}
}
return ret
}
func (m *Mesos) filterMetrics(role Role, metrics *map[string]interface{}) {
var ok bool
var selectedMetrics []string
if role == MASTER {
selectedMetrics = m.MasterCols
} else if role == SLAVE {
selectedMetrics = m.SlaveCols
}
for _, k := range metricsDiff(role, selectedMetrics) {
for _, v := range getMetrics(role, k) {
if _, ok = (*metrics)[v]; ok {
delete((*metrics), v)
}
}
}
}
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var tr = &http.Transport{
ResponseHeaderTimeout: time.Duration(3 * time.Second),
}
var client = &http.Client{
Transport: tr,
Timeout: time.Duration(4 * time.Second),
}
// TaskStats struct for JSON API output /monitor/statistics
type TaskStats struct {
ExecutorID string `json:"executor_id"`
FrameworkID string `json:"framework_id"`
Statistics map[string]interface{} `json:"statistics"`
}
func (m *Mesos) gatherSlaveTaskMetrics(address string, defaultPort string, acc telegraf.Accumulator) error {
var metrics []TaskStats
host, _, err := net.SplitHostPort(address)
if err != nil {
host = address
address = address + defaultPort
}
tags := map[string]string{
"server": host,
}
ts := strconv.Itoa(m.Timeout) + "ms"
resp, err := client.Get("http://" + address + "/monitor/statistics?timeout=" + ts)
if err != nil {
return err
}
data, err := ioutil.ReadAll(resp.Body)
resp.Body.Close()
if err != nil {
return err
}
if err = json.Unmarshal([]byte(data), &metrics); err != nil {
return errors.New("Error decoding JSON response")
}
for _, task := range metrics {
tags["framework_id"] = task.FrameworkID
jf := jsonparser.JSONFlattener{}
err = jf.FlattenJSON("", task.Statistics)
if err != nil {
return err
}
timestamp := time.Unix(int64(jf.Fields["timestamp"].(float64)), 0)
jf.Fields["executor_id"] = task.ExecutorID
acc.AddFields("mesos_tasks", jf.Fields, tags, timestamp)
}
return nil
}
// This should not belong to the object
func (m *Mesos) gatherMainMetrics(a string, defaultPort string, role Role, acc telegraf.Accumulator) error {
var jsonOut map[string]interface{}
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host, _, err := net.SplitHostPort(a)
if err != nil {
host = a
a = a + defaultPort
}
tags := map[string]string{
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"server": host,
"role": string(role),
}
ts := strconv.Itoa(m.Timeout) + "ms"
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resp, err := client.Get("http://" + a + "/metrics/snapshot?timeout=" + ts)
if err != nil {
return err
}
data, err := ioutil.ReadAll(resp.Body)
resp.Body.Close()
if err != nil {
return err
}
if err = json.Unmarshal([]byte(data), &jsonOut); err != nil {
return errors.New("Error decoding JSON response")
}
m.filterMetrics(role, &jsonOut)
jf := jsonparser.JSONFlattener{}
err = jf.FlattenJSON("", jsonOut)
if err != nil {
return err
}
if role == MASTER {
if jf.Fields["master/elected"] != 0.0 {
tags["state"] = "leader"
} else {
tags["state"] = "standby"
}
}
acc.AddFields("mesos", jf.Fields, tags)
return nil
}
func init() {
inputs.Add("mesos", func() telegraf.Input {
return &Mesos{}
})
}