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Add simple RabbitMQ plugin

This commit is contained in:
Ian Unruh 2015-07-21 10:29:25 -07:00
parent c4e5e743c4
commit fad63b28d1
3 changed files with 421 additions and 0 deletions
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1
plugins/all/all.go
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@ -6,6 +6,7 @@ import (
_ "github.com/influxdb/telegraf/plugins/mysql" _ "github.com/influxdb/telegraf/plugins/mysql"
_ "github.com/influxdb/telegraf/plugins/postgresql" _ "github.com/influxdb/telegraf/plugins/postgresql"
_ "github.com/influxdb/telegraf/plugins/prometheus" _ "github.com/influxdb/telegraf/plugins/prometheus"
_ "github.com/influxdb/telegraf/plugins/rabbitmq"
_ "github.com/influxdb/telegraf/plugins/redis" _ "github.com/influxdb/telegraf/plugins/redis"
_ "github.com/influxdb/telegraf/plugins/system" _ "github.com/influxdb/telegraf/plugins/system"
) )

218
plugins/rabbitmq/rabbitmq.go Normal file
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@ -0,0 +1,218 @@
package rabbitmq
import (
"encoding/json"
"fmt"
"net/http"
"github.com/influxdb/telegraf/plugins"
)
const DefaultUsername = "guest"
const DefaultPassword = "guest"
const DefaultURL = "http://localhost:15672"
type Server struct {
URL string
Username string
Password string
Nodes []string
}
type RabbitMQ struct {
Servers []*Server
Client *http.Client
}
type OverviewResponse struct {
MessageStats *MessageStats `json:"message_stats"`
ObjectTotals *ObjectTotals `json:"object_totals"`
QueueTotals *QueueTotals `json:"queue_totals"`
}
type MessageStats struct {
Ack int64
Deliver int64
Publish int64
}
type ObjectTotals struct {
Channels int64
Connections int64
Consumers int64
Exchanges int64
Queues int64
}
type QueueTotals struct {
Messages int64
MessagesReady int64 `json:"messages_ready"`
MessagesUnacknowledged int64 `json:"messages_unacknowledged"`
}
type Node struct {
Name string
DiskFree int64 `json:"disk_free"`
DiskFreeLimit int64 `json:"disk_free_limit"`
FdTotal int64 `json:"fd_total"`
FdUsed int64 `json:"fd_used"`
MemLimit int64 `json:"mem_limit"`
MemUsed int64 `json:"mem_used"`
ProcTotal int64 `json:"proc_total"`
ProcUsed int64 `json:"proc_used"`
RunQueue int64 `json:"run_queue"`
SocketsTotal int64 `json:"sockets_total"`
SocketsUsed int64 `json:"sockets_used"`
}
var sampleConfig = `
# Specify servers via an array of tables
[[rabbitmq.servers]]
# url = "http://localhost:15672"
# username = "guest"
# password = "guest"
# A list of nodes to pull metrics about. If not specified, metrics for
# all nodes are gathered.
# nodes = ["rabbit@node1", "rabbit@node2"]
`
func (r *RabbitMQ) SampleConfig() string {
return sampleConfig
}
func (r *RabbitMQ) Description() string {
return "Read metrics from one or many RabbitMQ servers via the management API"
}
var localhost = &Server{URL: DefaultURL}
func (r *RabbitMQ) Gather(acc plugins.Accumulator) error {
if r.Client == nil {
r.Client = &http.Client{}
}
if len(r.Servers) == 0 {
r.gatherServer(localhost, acc)
return nil
}
for _, serv := range r.Servers {
err := r.gatherServer(serv, acc)
if err != nil {
return err
}
}
return nil
}
func (r *RabbitMQ) gatherServer(serv *Server, acc plugins.Accumulator) error {
overview := &OverviewResponse{}
err := r.requestJSON(serv, "/api/overview", &overview)
if err != nil {
return err
}
tags := map[string]string{}
acc.Add("messages", overview.QueueTotals.Messages, tags)
acc.Add("messages_ready", overview.QueueTotals.MessagesReady, tags)
acc.Add("messages_unacked", overview.QueueTotals.MessagesUnacknowledged, tags)
acc.Add("channels", overview.ObjectTotals.Channels, tags)
acc.Add("connections", overview.ObjectTotals.Connections, tags)
acc.Add("consumers", overview.ObjectTotals.Consumers, tags)
acc.Add("exchanges", overview.ObjectTotals.Exchanges, tags)
acc.Add("queues", overview.ObjectTotals.Queues, tags)
if overview.MessageStats != nil {
acc.Add("messages_acked", overview.MessageStats.Ack, tags)
acc.Add("messages_delivered", overview.MessageStats.Deliver, tags)
acc.Add("messages_published", overview.MessageStats.Publish, tags)
}
nodes := make([]Node, 0)
err = r.requestJSON(serv, "/api/nodes", &nodes)
if err != nil {
return err
}
for _, node := range nodes {
if !shouldGatherNode(node, serv) {
continue
}
tags = map[string]string{"node": node.Name}
acc.Add("disk_free", node.DiskFree, tags)
acc.Add("disk_free_limit", node.DiskFreeLimit, tags)
acc.Add("fd_total", node.FdTotal, tags)
acc.Add("fd_used", node.FdUsed, tags)
acc.Add("mem_limit", node.MemLimit, tags)
acc.Add("mem_used", node.MemUsed, tags)
acc.Add("proc_total", node.ProcTotal, tags)
acc.Add("proc_used", node.ProcUsed, tags)
acc.Add("run_queue", node.RunQueue, tags)
acc.Add("sockets_total", node.SocketsTotal, tags)
acc.Add("sockets_used", node.SocketsUsed, tags)
}
return nil
}
func shouldGatherNode(node Node, serv *Server) bool {
if len(serv.Nodes) == 0 {
return true
}
for _, name := range serv.Nodes {
if name == node.Name {
return true
}
}
return false
}
func (r *RabbitMQ) requestJSON(serv *Server, u string, target interface{}) error {
u = fmt.Sprintf("%s%s", serv.URL, u)
req, err := http.NewRequest("GET", u, nil)
if err != nil {
return err
}
username := serv.Username
if username == "" {
username = DefaultUsername
}
password := serv.Password
if password == "" {
password = DefaultPassword
}
req.SetBasicAuth(username, password)
resp, err := r.Client.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
json.NewDecoder(resp.Body).Decode(target)
return nil
}
func init() {
plugins.Add("rabbitmq", func() plugins.Plugin {
return &RabbitMQ{}
})
}

202
plugins/rabbitmq/rabbitmq_test.go Normal file
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@ -0,0 +1,202 @@
package rabbitmq
import (
"fmt"
"net/http"
"net/http/httptest"
"testing"
"github.com/influxdb/telegraf/testutil"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
const sampleOverviewResponse = `
{
"message_stats": {
"ack": 5246,
"ack_details": {
"rate": 0.0
},
"deliver": 5246,
"deliver_details": {
"rate": 0.0
},
"deliver_get": 5246,
"deliver_get_details": {
"rate": 0.0
},
"publish": 5258,
"publish_details": {
"rate": 0.0
}
},
"object_totals": {
"channels": 44,
"connections": 44,
"consumers": 65,
"exchanges": 43,
"queues": 62
},
"queue_totals": {
"messages": 0,
"messages_details": {
"rate": 0.0
},
"messages_ready": 0,
"messages_ready_details": {
"rate": 0.0
},
"messages_unacknowledged": 0,
"messages_unacknowledged_details": {
"rate": 0.0
}
}
}
`
const sampleNodesResponse = `
[
{
"db_dir": "/var/lib/rabbitmq/mnesia/rabbit@vagrant-ubuntu-trusty-64",
"disk_free": 37768282112,
"disk_free_alarm": false,
"disk_free_details": {
"rate": 0.0
},
"disk_free_limit": 50000000,
"enabled_plugins": [
"rabbitmq_management"
],
"fd_total": 1024,
"fd_used": 63,
"fd_used_details": {
"rate": 0.0
},
"io_read_avg_time": 0,
"io_read_avg_time_details": {
"rate": 0.0
},
"io_read_bytes": 1,
"io_read_bytes_details": {
"rate": 0.0
},
"io_read_count": 1,
"io_read_count_details": {
"rate": 0.0
},
"io_sync_avg_time": 0,
"io_sync_avg_time_details": {
"rate": 0.0
},
"io_write_avg_time": 0,
"io_write_avg_time_details": {
"rate": 0.0
},
"log_file": "/var/log/rabbitmq/rabbit@vagrant-ubuntu-trusty-64.log",
"mem_alarm": false,
"mem_limit": 2503771750,
"mem_used": 159707080,
"mem_used_details": {
"rate": 15185.6
},
"mnesia_disk_tx_count": 16,
"mnesia_disk_tx_count_details": {
"rate": 0.0
},
"mnesia_ram_tx_count": 296,
"mnesia_ram_tx_count_details": {
"rate": 0.0
},
"name": "rabbit@vagrant-ubuntu-trusty-64",
"net_ticktime": 60,
"os_pid": "14244",
"partitions": [],
"proc_total": 1048576,
"proc_used": 783,
"proc_used_details": {
"rate": 0.0
},
"processors": 1,
"rates_mode": "basic",
"run_queue": 0,
"running": true,
"sasl_log_file": "/var/log/rabbitmq/rabbit@vagrant-ubuntu-trusty-64-sasl.log",
"sockets_total": 829,
"sockets_used": 45,
"sockets_used_details": {
"rate": 0.0
},
"type": "disc",
"uptime": 7464827
}
]
`
func TestRabbitMQGeneratesMetrics(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
var rsp string
if r.URL.Path == "/api/overview" {
rsp = sampleOverviewResponse
} else if r.URL.Path == "/api/nodes" {
rsp = sampleNodesResponse
} else {
panic("Cannot handle request")
}
fmt.Fprintln(w, rsp)
}))
defer ts.Close()
r := &RabbitMQ{
Servers: []*Server{
{
URL: ts.URL,
},
},
}
var acc testutil.Accumulator
err := r.Gather(&acc)
require.NoError(t, err)
intMetrics := []string{
"messages",
"messages_ready",
"messages_unacked",
"messages_acked",
"messages_delivered",
"messages_published",
"channels",
"connections",
"consumers",
"exchanges",
"queues",
}
for _, metric := range intMetrics {
assert.True(t, acc.HasIntValue(metric))
}
nodeIntMetrics := []string{
"disk_free",
"disk_free_limit",
"fd_total",
"fd_used",
"mem_limit",
"mem_used",
"proc_total",
"proc_used",
"run_queue",
"sockets_total",
"sockets_used",
}
for _, metric := range nodeIntMetrics {
assert.True(t, acc.HasIntValue(metric))
}
}