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Add PowerDNS Recursor input plugin (#4545)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| # PowerDNS Recursor Input Plugin | ||
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| The powerdns recursor plugin gathers metrics about PowerDNS Recursor using unix socket. | ||
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| ### Configuration: | ||
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| ``` | ||
| # Read metrics from one or many PowerDNS recursors | ||
| [[inputs.powerdns_recursor]] | ||
| ## An array of sockets to gather stats about. | ||
| ## Specify a path to unix socket. | ||
| ## | ||
| ## If no servers are specified, then '/var/run/pdns_recursor.controlsocket' is used as the path. | ||
| unix_sockets = ["/var/run/pdns_recursor.controlsocket"] | ||
| ## Socket for Receive | ||
| # socket_dir = "/var/run/" | ||
| ## Socket permissions | ||
| # socket_mode = "0666" | ||
| ``` | ||
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| ### Measurements & Fields: | ||
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| - powerdns_recursor | ||
| - all-outqueries | ||
| - answers-slow | ||
| - answers0-1 | ||
| - answers1-10 | ||
| - answers10-100 | ||
| - answers100-1000 | ||
| - auth-zone-queries | ||
| - auth4-answers-slow | ||
| - auth4-answers0-1 | ||
| - auth4-answers1-10 | ||
| - auth4-answers10-100 | ||
| - auth4-answers100-1000 | ||
| - auth6-answers-slow | ||
| - auth6-answers0-1 | ||
| - auth6-answers1-10 | ||
| - auth6-answers10-100 | ||
| - auth6-answers100-1000 | ||
| - cache-entries | ||
| - cache-hits | ||
| - cache-misses | ||
| - case-mismatches | ||
| - chain-resends | ||
| - client-parse-errors | ||
| - concurrent-queries | ||
| - dlg-only-drops | ||
| - dnssec-queries | ||
| - dnssec-result-bogus | ||
| - dnssec-result-indeterminate | ||
| - dnssec-result-insecure | ||
| - dnssec-result-nta | ||
| - dnssec-result-secure | ||
| - dnssec-validations | ||
| - dont-outqueries | ||
| - ecs-queries | ||
| - ecs-responses | ||
| - edns-ping-matches | ||
| - edns-ping-mismatches | ||
| - failed-host-entries | ||
| - fd-usage | ||
| - ignored-packets | ||
| - ipv6-outqueries | ||
| - ipv6-questions | ||
| - malloc-bytes | ||
| - max-cache-entries | ||
| - max-mthread-stack | ||
| - max-packetcache-entries | ||
| - negcache-entries | ||
| - no-packet-error | ||
| - noedns-outqueries | ||
| - noerror-answers | ||
| - noping-outqueries | ||
| - nsset-invalidations | ||
| - nsspeeds-entries | ||
| - nxdomain-answers | ||
| - outgoing-timeouts | ||
| - outgoing4-timeouts | ||
| - outgoing6-timeouts | ||
| - over-capacity-drops | ||
| - packetcache-entries | ||
| - packetcache-hits | ||
| - packetcache-misses | ||
| - policy-drops | ||
| - policy-result-custom | ||
| - policy-result-drop | ||
| - policy-result-noaction | ||
| - policy-result-nodata | ||
| - policy-result-nxdomain | ||
| - policy-result-truncate | ||
| - qa-latency | ||
| - query-pipe-full-drops | ||
| - questions | ||
| - real-memory-usage | ||
| - resource-limits | ||
| - security-status | ||
| - server-parse-errors | ||
| - servfail-answers | ||
| - spoof-prevents | ||
| - sys-msec | ||
| - tcp-client-overflow | ||
| - tcp-clients | ||
| - tcp-outqueries | ||
| - tcp-questions | ||
| - throttle-entries | ||
| - throttled-out | ||
| - throttled-outqueries | ||
| - too-old-drops | ||
| - udp-in-errors | ||
| - udp-noport-errors | ||
| - udp-recvbuf-errors | ||
| - udp-sndbuf-errors | ||
| - unauthorized-tcp | ||
| - unauthorized-udp | ||
| - unexpected-packets | ||
| - unreachables | ||
| - uptime | ||
| - user-msec | ||
| - x-our-latency | ||
| - x-ourtime-slow | ||
| - x-ourtime0-1 | ||
| - x-ourtime1-2 | ||
| - x-ourtime16-32 | ||
| - x-ourtime2-4 | ||
| - x-ourtime4-8 | ||
| - x-ourtime8-16 | ||
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| ### Tags: | ||
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| - tags: `server=socket` | ||
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| ### Example Output: | ||
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| ``` | ||
| $ ./telegraf --config telegraf.conf --input-filter powerdns_recursor --test | ||
| > powerdns_recursor,server=/var/run/pdns_recursor.controlsocket all-outqueries=3631810i,answers-slow=36863i,answers0-1=179612i,answers1-10=1223305i,answers10-100=1252199i,answers100-1000=408357i,auth-zone-queries=4i,auth4-answers-slow=44758i,auth4-answers0-1=59721i,auth4-answers1-10=1766787i,auth4-answers10-100=1329638i,auth4-answers100-1000=430372i,auth6-answers-slow=0i,auth6-answers0-1=0i,auth6-answers1-10=0i,auth6-answers10-100=0i,auth6-answers100-1000=0i,cache-entries=296689i,cache-hits=150654i,cache-misses=2949682i,case-mismatches=0i,chain-resends=420004i,client-parse-errors=0i,concurrent-queries=0i,dlg-only-drops=0i,dnssec-queries=152970i,dnssec-result-bogus=0i,dnssec-result-indeterminate=0i,dnssec-result-insecure=0i,dnssec-result-nta=0i,dnssec-result-secure=47i,dnssec-validations=47i,dont-outqueries=62i,ecs-queries=0i,ecs-responses=0i,edns-ping-matches=0i,edns-ping-mismatches=0i,failed-host-entries=21i,fd-usage=32i,ignored-packets=0i,ipv6-outqueries=0i,ipv6-questions=0i,malloc-bytes=0i,max-cache-entries=1000000i,max-mthread-stack=33747i,max-packetcache-entries=500000i,negcache-entries=100019i,no-packet-error=0i,noedns-outqueries=73341i,noerror-answers=25453808i,noping-outqueries=0i,nsset-invalidations=2398i,nsspeeds-entries=3966i,nxdomain-answers=3341302i,outgoing-timeouts=44384i,outgoing4-timeouts=44384i,outgoing6-timeouts=0i,over-capacity-drops=0i,packetcache-entries=78258i,packetcache-hits=25999027i,packetcache-misses=3100179i,policy-drops=0i,policy-result-custom=0i,policy-result-drop=0i,policy-result-noaction=3100336i,policy-result-nodata=0i,policy-result-nxdomain=0i,policy-result-truncate=0i,qa-latency=6553i,query-pipe-full-drops=0i,questions=29099363i,real-memory-usage=280494080i,resource-limits=0i,security-status=1i,server-parse-errors=0i,servfail-answers=304253i,spoof-prevents=0i,sys-msec=1312600i,tcp-client-overflow=0i,tcp-clients=0i,tcp-outqueries=116i,tcp-questions=133i,throttle-entries=21i,throttled-out=13296i,throttled-outqueries=13296i,too-old-drops=2i,udp-in-errors=4i,udp-noport-errors=2918i,udp-recvbuf-errors=0i,udp-sndbuf-errors=0i,unauthorized-tcp=0i,unauthorized-udp=0i,unexpected-packets=0i,unreachables=1708i,uptime=167482i,user-msec=1282640i,x-our-latency=19i,x-ourtime-slow=642i,x-ourtime0-1=3095566i,x-ourtime1-2=3401i,x-ourtime16-32=201i,x-ourtime2-4=304i,x-ourtime4-8=198i,x-ourtime8-16=24i 1533903879000000000 | ||
| ``` |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| package powerdns_recursor | ||
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| import ( | ||
| "bufio" | ||
| "errors" | ||
| "fmt" | ||
| "log" | ||
| "math/rand" | ||
| "net" | ||
| "os" | ||
| "path/filepath" | ||
| "strconv" | ||
| "strings" | ||
| "time" | ||
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| "github.com/influxdata/telegraf" | ||
| "github.com/influxdata/telegraf/plugins/inputs" | ||
| ) | ||
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| type PowerdnsRecursor struct { | ||
| UnixSockets []string | ||
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| SocketDir string `toml:"socket_dir"` | ||
| SocketMode uint32 `toml:"socket_mode"` | ||
| } | ||
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| var defaultTimeout = 5 * time.Second | ||
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| var sampleConfig = ` | ||
| ## An array of sockets to gather stats about. | ||
| ## Specify a path to unix socket. | ||
| unix_sockets = ["/var/run/pdns_recursor.controlsocket"] | ||
| ## Socket for Receive | ||
| #socket_dir = "/var/run/" | ||
| ## Socket permissions | ||
| #socket_mode = "0666" | ||
| ` | ||
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| func (p *PowerdnsRecursor) SampleConfig() string { | ||
| return sampleConfig | ||
| } | ||
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| func (p *PowerdnsRecursor) Description() string { | ||
| return "Read metrics from one or many PowerDNS Recursor servers" | ||
| } | ||
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| func (p *PowerdnsRecursor) Gather(acc telegraf.Accumulator) error { | ||
| if len(p.UnixSockets) == 0 { | ||
| return p.gatherServer("/var/run/pdns_recursor.controlsocket", acc) | ||
| } | ||
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| for _, serverSocket := range p.UnixSockets { | ||
| if err := p.gatherServer(serverSocket, acc); err != nil { | ||
| acc.AddError(err) | ||
| } | ||
| } | ||
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| return nil | ||
| } | ||
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| func (p *PowerdnsRecursor) gatherServer(address string, acc telegraf.Accumulator) error { | ||
| randomNumber := rand.Int63() | ||
| recvSocket := filepath.Join("/", "var", "run", fmt.Sprintf("pdns_recursor_telegraf%d", randomNumber)) | ||
| if p.SocketDir != "" { | ||
| recvSocket = filepath.Join(p.SocketDir, fmt.Sprintf("pdns_recursor_telegraf%d", randomNumber)) | ||
| } | ||
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| laddr, err := net.ResolveUnixAddr("unixgram", recvSocket) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer os.Remove(recvSocket) | ||
| raddr, err := net.ResolveUnixAddr("unixgram", address) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| conn, err := net.DialUnix("unixgram", laddr, raddr) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| perm := uint32(0666) | ||
| if p.SocketMode > 0 { | ||
| perm = p.SocketMode | ||
| } | ||
| if err := os.Chmod(recvSocket, os.FileMode(perm)); err != nil { | ||
| return err | ||
| } | ||
| defer conn.Close() | ||
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| conn.SetDeadline(time.Now().Add(defaultTimeout)) | ||
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| // Read and write buffer | ||
| rw := bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn)) | ||
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| // Send command | ||
| if _, err := fmt.Fprint(rw, "get-all\n"); err != nil { | ||
| return nil | ||
| } | ||
| if err := rw.Flush(); err != nil { | ||
| return err | ||
| } | ||
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| // Read data | ||
| buf := make([]byte, 16384) | ||
| n, err := rw.Read(buf) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if n == 0 { | ||
| return errors.New("no data received") | ||
| } | ||
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| metrics := string(buf) | ||
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| // Process data | ||
| fields := parseResponse(metrics) | ||
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| // Add server socket as a tag | ||
| tags := map[string]string{"server": address} | ||
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| acc.AddFields("powerdns_recursor", fields, tags) | ||
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| conn.Close() | ||
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| return nil | ||
| } | ||
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| func parseResponse(metrics string) map[string]interface{} { | ||
| values := make(map[string]interface{}) | ||
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| s := strings.Split(metrics, "\n") | ||
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| for _, metric := range s[:len(s)-1] { | ||
| m := strings.Split(metric, "\t") | ||
| if len(m) < 2 { | ||
| continue | ||
| } | ||
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| i, err := strconv.ParseInt(m[1], 10, 64) | ||
| if err != nil { | ||
| log.Printf("E! [inputs.powerdns_recursor] Error parsing integer for metric [%s] %v", | ||
| metric, err) | ||
| continue | ||
| } | ||
| values[m[0]] = i | ||
| } | ||
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| return values | ||
| } | ||
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| func init() { | ||
| inputs.Add("powerdns_recursor", func() telegraf.Input { | ||
| return &PowerdnsRecursor{} | ||
| }) | ||
| } |
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