telegraf/plugins/inputs/mesos/mesos.go

646 lines
15 KiB
Go

package mesos
import (
"encoding/json"
"errors"
"io/ioutil"
"log"
"net"
"net/http"
"net/url"
"strconv"
"strings"
"sync"
"time"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/internal/tls"
"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"`
tls.ClientConfig
Log telegraf.Logger
initialized bool
client *http.Client
masterURLs []*url.URL
slaveURLs []*url.URL
}
var allMetrics = map[Role][]string{
MASTER: {"resources", "master", "system", "agents", "frameworks", "framework_offers", "tasks", "messages", "evqueue", "registrar", "allocator"},
SLAVE: {"resources", "agent", "system", "executors", "tasks", "messages"},
}
var sampleConfig = `
## Timeout, in ms.
timeout = 100
## A list of Mesos masters.
masters = ["http://localhost:5050"]
## Master metrics groups to be collected, by default, all enabled.
master_collections = [
"resources",
"master",
"system",
"agents",
"frameworks",
"framework_offers",
"tasks",
"messages",
"evqueue",
"registrar",
"allocator",
]
## 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",
# ]
## Optional TLS Config
# tls_ca = "/etc/telegraf/ca.pem"
# tls_cert = "/etc/telegraf/cert.pem"
# tls_key = "/etc/telegraf/key.pem"
## Use TLS but skip chain & host verification
# insecure_skip_verify = false
`
// 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 parseURL(s string, role Role) (*url.URL, error) {
if !strings.HasPrefix(s, "http://") && !strings.HasPrefix(s, "https://") {
host, port, err := net.SplitHostPort(s)
// no port specified
if err != nil {
host = s
switch role {
case MASTER:
port = "5050"
case SLAVE:
port = "5051"
}
}
s = "http://" + host + ":" + port
log.Printf("W! [inputs.mesos] using %q as connection URL; please update your configuration to use an URL", s)
}
return url.Parse(s)
}
func (m *Mesos) initialize() error {
if len(m.MasterCols) == 0 {
m.MasterCols = allMetrics[MASTER]
}
if len(m.SlaveCols) == 0 {
m.SlaveCols = allMetrics[SLAVE]
}
if m.Timeout == 0 {
m.Log.Info("Missing timeout value, setting default value (100ms)")
m.Timeout = 100
}
rawQuery := "timeout=" + strconv.Itoa(m.Timeout) + "ms"
m.masterURLs = make([]*url.URL, 0, len(m.Masters))
for _, master := range m.Masters {
u, err := parseURL(master, MASTER)
if err != nil {
return err
}
u.RawQuery = rawQuery
m.masterURLs = append(m.masterURLs, u)
}
m.slaveURLs = make([]*url.URL, 0, len(m.Slaves))
for _, slave := range m.Slaves {
u, err := parseURL(slave, SLAVE)
if err != nil {
return err
}
u.RawQuery = rawQuery
m.slaveURLs = append(m.slaveURLs, u)
}
client, err := m.createHttpClient()
if err != nil {
return err
}
m.client = client
return nil
}
// Gather() metrics from given list of Mesos Masters
func (m *Mesos) Gather(acc telegraf.Accumulator) error {
if !m.initialized {
err := m.initialize()
if err != nil {
return err
}
m.initialized = true
}
var wg sync.WaitGroup
for _, master := range m.masterURLs {
wg.Add(1)
go func(master *url.URL) {
acc.AddError(m.gatherMainMetrics(master, MASTER, acc))
wg.Done()
return
}(master)
}
for _, slave := range m.slaveURLs {
wg.Add(1)
go func(slave *url.URL) {
acc.AddError(m.gatherMainMetrics(slave, SLAVE, acc))
wg.Done()
return
}(slave)
}
wg.Wait()
return nil
}
func (m *Mesos) createHttpClient() (*http.Client, error) {
tlsCfg, err := m.ClientConfig.TLSConfig()
if err != nil {
return nil, err
}
client := &http.Client{
Transport: &http.Transport{
Proxy: http.ProxyFromEnvironment,
TLSClientConfig: tlsCfg,
},
Timeout: 4 * time.Second,
}
return client, nil
}
// 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
}
// 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",
"master/slave_unreachable_canceled",
"master/slave_unreachable_completed",
"master/slave_unreachable_scheduled",
"master/slaves_unreachable",
}
m["frameworks"] = []string{
"master/frameworks_active",
"master/frameworks_connected",
"master/frameworks_disconnected",
"master/frameworks_inactive",
"master/outstanding_offers",
}
// framework_offers and allocator metrics have unpredictable names, so they can't be listed here.
// These empty groups are included to prevent the "unknown metrics group" info log below.
// filterMetrics() filters these metrics by looking for names with the corresponding prefix.
m["framework_offers"] = []string{}
m["allocator"] = []string{}
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",
"master/tasks_dropped",
"master/tasks_gone",
"master/tasks_gone_by_operator",
"master/tasks_killing",
"master/tasks_unreachable",
}
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",
"master/invalid_operation_status_update_acknowledgements",
"master/messages_operation_status_update_acknowledgement",
"master/messages_reconcile_operations",
"master/messages_suppress_offers",
"master/valid_operation_status_update_acknowledgements",
}
m["evqueue"] = []string{
"master/event_queue_dispatches",
"master/event_queue_http_requests",
"master/event_queue_messages",
"master/operator_event_stream_subscribers",
}
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",
"registrar/log/ensemble_size",
"registrar/log/recovered",
"registrar/queued_operations",
"registrar/registry_size_bytes",
"registrar/state_store_ms/count",
}
} 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! [inputs.mesos] unknown role %q metrics group: %s", 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) {
switch k {
// allocator and framework_offers metrics have unpredictable names, so we have to identify them by name prefix.
case "allocator":
for m := range *metrics {
if strings.HasPrefix(m, "allocator/") {
delete((*metrics), m)
}
}
case "framework_offers":
for m := range *metrics {
if strings.HasPrefix(m, "master/frameworks/") || strings.HasPrefix(m, "frameworks/") {
delete((*metrics), m)
}
}
// All other metrics have predictable names. We can use getMetrics() to retrieve them.
default:
for _, v := range getMetrics(role, k) {
if _, ok = (*metrics)[v]; ok {
delete((*metrics), v)
}
}
}
}
}
// 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(u *url.URL, acc telegraf.Accumulator) error {
var metrics []TaskStats
tags := map[string]string{
"server": u.Hostname(),
"url": urlTag(u),
}
resp, err := m.client.Get(withPath(u, "/monitor/statistics").String())
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
}
func withPath(u *url.URL, path string) *url.URL {
c := *u
c.Path = path
return &c
}
func urlTag(u *url.URL) string {
c := *u
c.Path = ""
c.User = nil
c.RawQuery = ""
return c.String()
}
// This should not belong to the object
func (m *Mesos) gatherMainMetrics(u *url.URL, role Role, acc telegraf.Accumulator) error {
var jsonOut map[string]interface{}
tags := map[string]string{
"server": u.Hostname(),
"url": urlTag(u),
"role": string(role),
}
resp, err := m.client.Get(withPath(u, "/metrics/snapshot").String())
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{}
})
}