package rabbitmq import ( "encoding/json" "fmt" "net/http" "strconv" "time" "github.com/influxdb/telegraf/plugins" ) const DefaultUsername = "guest" const DefaultPassword = "guest" const DefaultURL = "http://localhost:15672" type RabbitMQ struct { URL string Name string Username string Password string Nodes []string Queues []string Client *http.Client } type OverviewResponse struct { MessageStats *MessageStats `json:"message_stats"` ObjectTotals *ObjectTotals `json:"object_totals"` QueueTotals *QueueTotals `json:"queue_totals"` } type Details struct { Rate float64 } type MessageStats struct { Ack int64 AckDetails Details `json:"ack_details"` Deliver int64 DeliverDetails Details `json:"deliver_details"` DeliverGet int64 DeliverGetDetails Details `json:"deliver_get_details"` Publish int64 PublishDetails Details `json:"publish_details"` Redeliver int64 RedeliverDetails Details `json:"redeliver_details"` } 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 Queue struct { QueueTotals // just to not repeat the same code MessageStats `json:"message_stats"` Memory int64 Consumers int64 ConsumerUtilisation float64 `json:"consumer_utilisation"` Name string Node string Vhost string Durable bool AutoDelete bool `json:"auto_delete"` } 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"` } type gatherFunc func(r *RabbitMQ, acc plugins.Accumulator, errChan chan error) var gatherFunctions = []gatherFunc{gatherOverview, gatherNodes, gatherQueues} var sampleConfig = ` url = "http://localhost:15672" # required # name = "rmq-server-1" # optional tag # 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" } func (r *RabbitMQ) Gather(acc plugins.Accumulator) error { if r.Client == nil { r.Client = &http.Client{} } var errChan = make(chan error, len(gatherFunctions)) for _, f := range gatherFunctions { go f(r, acc, errChan) } for i := 1; i <= len(gatherFunctions); i++ { err := <-errChan if err != nil { return err } } return nil } func (r *RabbitMQ) requestJSON(u string, target interface{}) error { u = fmt.Sprintf("%s%s", r.URL, u) req, err := http.NewRequest("GET", u, nil) if err != nil { return err } username := r.Username if username == "" { username = DefaultUsername } password := r.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 gatherOverview(r *RabbitMQ, acc plugins.Accumulator, errChan chan error) { overview := &OverviewResponse{} err := r.requestJSON("/api/overview", &overview) if err != nil { errChan <- err return } if overview.QueueTotals == nil || overview.ObjectTotals == nil || overview.MessageStats == nil { errChan <- fmt.Errorf("Wrong answer from rabbitmq. Probably auth issue") return } tags := map[string]string{"url": r.URL} if r.Name != "" { tags["name"] = r.Name } fields := map[string]interface{}{ "messages": overview.QueueTotals.Messages, "messages_ready": overview.QueueTotals.MessagesReady, "messages_unacked": overview.QueueTotals.MessagesUnacknowledged, "channels": overview.ObjectTotals.Channels, "connections": overview.ObjectTotals.Connections, "consumers": overview.ObjectTotals.Consumers, "exchanges": overview.ObjectTotals.Exchanges, "queues": overview.ObjectTotals.Queues, "messages_acked": overview.MessageStats.Ack, "messages_delivered": overview.MessageStats.Deliver, "messages_published": overview.MessageStats.Publish, } acc.AddFields("rabbitmq_overview", fields, tags) errChan <- nil } func gatherNodes(r *RabbitMQ, acc plugins.Accumulator, errChan chan error) { nodes := make([]Node, 0) // Gather information about nodes err := r.requestJSON("/api/nodes", &nodes) if err != nil { errChan <- err return } now := time.Now() for _, node := range nodes { if !r.shouldGatherNode(node) { continue } tags := map[string]string{"url": r.URL} tags["node"] = node.Name fields := map[string]interface{}{ "disk_free": node.DiskFree, "disk_free_limit": node.DiskFreeLimit, "fd_total": node.FdTotal, "fd_used": node.FdUsed, "mem_limit": node.MemLimit, "mem_used": node.MemUsed, "proc_total": node.ProcTotal, "proc_used": node.ProcUsed, "run_queue": node.RunQueue, "sockets_total": node.SocketsTotal, "sockets_used": node.SocketsUsed, } acc.AddFields("rabbitmq_node", fields, tags, now) } errChan <- nil } func gatherQueues(r *RabbitMQ, acc plugins.Accumulator, errChan chan error) { // Gather information about queues queues := make([]Queue, 0) err := r.requestJSON("/api/queues", &queues) if err != nil { errChan <- err return } for _, queue := range queues { if !r.shouldGatherQueue(queue) { continue } tags := map[string]string{ "url": r.URL, "queue": queue.Name, "vhost": queue.Vhost, "node": queue.Node, "durable": strconv.FormatBool(queue.Durable), "auto_delete": strconv.FormatBool(queue.AutoDelete), } acc.AddFields( "rabbitmq_queue", map[string]interface{}{ // common information "consumers": queue.Consumers, "consumer_utilisation": queue.ConsumerUtilisation, "memory": queue.Memory, // messages information "messages": queue.Messages, "messages_ready": queue.MessagesReady, "messages_unack": queue.MessagesUnacknowledged, "messages_ack": queue.MessageStats.Ack, "messages_ack_rate": queue.MessageStats.AckDetails.Rate, "messages_deliver": queue.MessageStats.Deliver, "messages_deliver_rate": queue.MessageStats.DeliverDetails.Rate, "messages_deliver_get": queue.MessageStats.DeliverGet, "messages_deliver_get_rate": queue.MessageStats.DeliverGetDetails.Rate, "messages_publish": queue.MessageStats.Publish, "messages_publish_rate": queue.MessageStats.PublishDetails.Rate, "messages_redeliver": queue.MessageStats.Redeliver, "messages_redeliver_rate": queue.MessageStats.RedeliverDetails.Rate, }, tags, ) } errChan <- nil } func (r *RabbitMQ) shouldGatherNode(node Node) bool { if len(r.Nodes) == 0 { return true } for _, name := range r.Nodes { if name == node.Name { return true } } return false } func (r *RabbitMQ) shouldGatherQueue(queue Queue) bool { if len(r.Queues) == 0 { return true } for _, name := range r.Queues { if name == queue.Name { return true } } return false } func init() { plugins.Add("rabbitmq", func() plugins.Plugin { return &RabbitMQ{} }) }