package bind import ( "encoding/xml" "fmt" "net" "net/http" "net/url" "time" "github.com/influxdata/telegraf" "github.com/influxdata/telegraf/metric" ) type v2Root struct { XMLName xml.Name Version string `xml:"version,attr"` Statistics v2Statistics `xml:"bind>statistics"` } // Omitted branches: socketmgr, taskmgr type v2Statistics struct { Version string `xml:"version,attr"` Views []struct { // Omitted branches: zones Name string `xml:"name"` RdTypes []v2Counter `xml:"rdtype"` ResStats []v2Counter `xml:"resstat"` Caches []struct { Name string `xml:"name,attr"` RRSets []v2Counter `xml:"rrset"` } `xml:"cache"` } `xml:"views>view"` Server struct { OpCodes []v2Counter `xml:"requests>opcode"` RdTypes []v2Counter `xml:"queries-in>rdtype"` NSStats []v2Counter `xml:"nsstat"` ZoneStats []v2Counter `xml:"zonestat"` ResStats []v2Counter `xml:"resstat"` SockStats []v2Counter `xml:"sockstat"` } `xml:"server"` Memory struct { Contexts []struct { // Omitted nodes: references, maxinuse, blocksize, pools, hiwater, lowater Id string `xml:"id"` Name string `xml:"name"` Total int `xml:"total"` InUse int `xml:"inuse"` } `xml:"contexts>context"` Summary struct { TotalUse int InUse int BlockSize int ContextSize int Lost int } `xml:"summary"` } `xml:"memory"` } // BIND statistics v2 counter struct used throughout type v2Counter struct { Name string `xml:"name"` Value int `xml:"counter"` } // addXMLv2Counter adds a v2Counter array to a Telegraf Accumulator, with the specified tags func addXMLv2Counter(acc telegraf.Accumulator, commonTags map[string]string, stats []v2Counter) { grouper := metric.NewSeriesGrouper() ts := time.Now() for _, c := range stats { tags := make(map[string]string) // Create local copy of tags since maps are reference types for k, v := range commonTags { tags[k] = v } grouper.Add("bind_counter", tags, ts, c.Name, c.Value) } //Add grouped metrics for _, metric := range grouper.Metrics() { acc.AddMetric(metric) } } // readStatsXMLv2 decodes a BIND9 XML statistics version 2 document. Unlike the XML v3 statistics // format, the v2 format does not support broken-out subsets. func (b *Bind) readStatsXMLv2(addr *url.URL, acc telegraf.Accumulator) error { var stats v2Root resp, err := client.Get(addr.String()) if err != nil { return err } defer resp.Body.Close() if resp.StatusCode != http.StatusOK { return fmt.Errorf("%s returned HTTP status: %s", addr, resp.Status) } if err := xml.NewDecoder(resp.Body).Decode(&stats); err != nil { return fmt.Errorf("Unable to decode XML document: %s", err) } tags := map[string]string{"url": addr.Host} host, port, _ := net.SplitHostPort(addr.Host) tags["source"] = host tags["port"] = port // Opcodes tags["type"] = "opcode" addXMLv2Counter(acc, tags, stats.Statistics.Server.OpCodes) // Query RDATA types tags["type"] = "qtype" addXMLv2Counter(acc, tags, stats.Statistics.Server.RdTypes) // Nameserver stats tags["type"] = "nsstat" addXMLv2Counter(acc, tags, stats.Statistics.Server.NSStats) // Zone stats tags["type"] = "zonestat" addXMLv2Counter(acc, tags, stats.Statistics.Server.ZoneStats) // Socket statistics tags["type"] = "sockstat" addXMLv2Counter(acc, tags, stats.Statistics.Server.SockStats) // Memory stats fields := map[string]interface{}{ "total_use": stats.Statistics.Memory.Summary.TotalUse, "in_use": stats.Statistics.Memory.Summary.InUse, "block_size": stats.Statistics.Memory.Summary.BlockSize, "context_size": stats.Statistics.Memory.Summary.ContextSize, "lost": stats.Statistics.Memory.Summary.Lost, } acc.AddGauge("bind_memory", fields, map[string]string{"url": addr.Host, "source": host, "port": port}) // Detailed, per-context memory stats if b.GatherMemoryContexts { for _, c := range stats.Statistics.Memory.Contexts { tags := map[string]string{"url": addr.Host, "id": c.Id, "name": c.Name, "source": host, "port": port} fields := map[string]interface{}{"total": c.Total, "in_use": c.InUse} acc.AddGauge("bind_memory_context", fields, tags) } } // Detailed, per-view stats if b.GatherViews { for _, v := range stats.Statistics.Views { tags := map[string]string{"url": addr.Host, "view": v.Name} // Query RDATA types tags["type"] = "qtype" addXMLv2Counter(acc, tags, v.RdTypes) // Resolver stats tags["type"] = "resstats" addXMLv2Counter(acc, tags, v.ResStats) } } return nil }