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lanz.go
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lanz.go
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package lanz
import (
"net/url"
"strconv"
"sync"
"time"
"github.com/aristanetworks/goarista/lanz"
pb "github.com/aristanetworks/goarista/lanz/proto"
"github.com/circonus-labs/circonus-unified-agent/cua"
"github.com/circonus-labs/circonus-unified-agent/plugins/inputs"
)
var sampleConfig = `
## URL to Arista LANZ endpoint
servers = [
"tcp://127.0.0.1:50001"
]
`
func init() {
inputs.Add("lanz", func() cua.Input {
return NewLanz()
})
}
type Lanz struct {
Servers []string `toml:"servers"`
clients []lanz.Client
wg sync.WaitGroup
}
func NewLanz() *Lanz {
return &Lanz{}
}
func (l *Lanz) SampleConfig() string {
return sampleConfig
}
func (l *Lanz) Description() string {
return "Read metrics off Arista LANZ, via socket"
}
func (l *Lanz) Gather(acc cua.Accumulator) error {
return nil
}
func (l *Lanz) Start(acc cua.Accumulator) error {
if len(l.Servers) == 0 {
l.Servers = append(l.Servers, "tcp://127.0.0.1:50001")
}
for _, server := range l.Servers {
deviceUrl, err := url.Parse(server)
if err != nil {
return err
}
client := lanz.New(
lanz.WithAddr(deviceUrl.Host),
lanz.WithBackoff(1*time.Second),
lanz.WithTimeout(10*time.Second),
)
l.clients = append(l.clients, client)
in := make(chan *pb.LanzRecord)
go func() {
client.Run(in)
}()
l.wg.Add(1)
go func() {
l.wg.Done()
receive(acc, in, deviceUrl)
}()
}
return nil
}
func (l *Lanz) Stop() {
for _, client := range l.clients {
client.Stop()
}
l.wg.Wait()
}
func receive(acc cua.Accumulator, in <-chan *pb.LanzRecord, deviceUrl *url.URL) {
for msg := range in {
msgToAccumulator(acc, msg, deviceUrl)
}
}
func msgToAccumulator(acc cua.Accumulator, msg *pb.LanzRecord, deviceUrl *url.URL) {
cr := msg.GetCongestionRecord()
if cr != nil {
vals := map[string]interface{}{
"timestamp": int64(cr.GetTimestamp()),
"queue_size": int64(cr.GetQueueSize()),
"time_of_max_qlen": int64(cr.GetTimeOfMaxQLen()),
"tx_latency": int64(cr.GetTxLatency()),
"q_drop_count": int64(cr.GetQDropCount()),
}
tags := map[string]string{
"intf_name": cr.GetIntfName(),
"switch_id": strconv.FormatInt(int64(cr.GetSwitchId()), 10),
"port_id": strconv.FormatInt(int64(cr.GetPortId()), 10),
"entry_type": strconv.FormatInt(int64(cr.GetEntryType()), 10),
"traffic_class": strconv.FormatInt(int64(cr.GetTrafficClass()), 10),
"fabric_peer_intf_name": cr.GetFabricPeerIntfName(),
"source": deviceUrl.Hostname(),
"port": deviceUrl.Port(),
}
acc.AddFields("lanz_congestion_record", vals, tags)
}
gbur := msg.GetGlobalBufferUsageRecord()
if gbur != nil {
vals := map[string]interface{}{
"timestamp": int64(gbur.GetTimestamp()),
"buffer_size": int64(gbur.GetBufferSize()),
"duration": int64(gbur.GetDuration()),
}
tags := map[string]string{
"entry_type": strconv.FormatInt(int64(gbur.GetEntryType()), 10),
"source": deviceUrl.Hostname(),
"port": deviceUrl.Port(),
}
acc.AddFields("lanz_global_buffer_usage_record", vals, tags)
}
}