Add collector to read data from ipmitool or ipmi-sensors (fallback) (#9)

* Add collector to read data from ipmitool or ipmi-sensors

* Update IPMI collector to use own config

* Add 'ipmitool sensor' parser

collectors/README.md

@@ -40,6 +40,7 @@ The base class/configuration is located in `metricCollector.go`.
 * `cpustatMetric.go`: Read CPU specific values from `/proc/stat`
 * `topprocsMetric.go`: Reads the Top5 processes by their CPU usage
 * `nvidiaMetric.go`: Read data about Nvidia GPUs using the NVML library
+* `ipmiMetric.go`: Collect data from `ipmitool` or as fallback `ipmi-sensors`
 
 If any of the collectors cannot be initialized, it is excluded from all further reads. Like if the Lustre stat file is not a valid path, no Lustre specific metrics will be recorded.
 

collectors/ipmiMetric.go

@@ -0,0 +1,137 @@
+package collectors
+
+import (
+	"errors"
+	lp "github.com/influxdata/line-protocol"
+	"log"
+	"strconv"
+	"strings"
+	"time"
+	"os"
+	"os/exec"
+	"encoding/json"
+)
+
+const IPMITOOL_PATH = `/usr/bin/ipmitool`
+const IPMISENSORS_PATH = `/usr/sbin/ipmi-sensors`
+
+type IpmiCollectorConfig struct {
+    ExcludeDevices []string `json:"exclude_devices"`
+    IpmitoolPath string `json:"ipmitool_path"`
+    IpmisensorsPath string `json:"ipmisensors_path"`
+}
+
+type IpmiCollector struct {
+	MetricCollector
+	tags    map[string]string
+	matches map[string]string
+	config IpmiCollectorConfig
+}
+
+func (m *IpmiCollector) Init(config []byte) error {
+	m.name = "IpmiCollector"
+	m.setup()
+	if len(config) > 0 {
+		err := json.Unmarshal(config, &m.config)
+		if err != nil {
+			return err
+		}
+	}
+	_, err1 := os.Stat(m.config.IpmitoolPath)
+	_, err2 := os.Stat(m.config.IpmisensorsPath)
+	if err1 != nil {
+	    m.config.IpmitoolPath = ""
+	}
+	if err2 != nil {
+	    m.config.IpmisensorsPath = ""
+	}
+	if err1 != nil && err2 != nil {
+	    return errors.New("No IPMI reader found")
+	}
+	m.init = true
+	return nil
+}
+
+func ReadIpmiTool(cmd string, out *[]lp.MutableMetric) {
+	command := exec.Command(cmd, "sensor")
+	command.Wait()
+	stdout, err := command.Output()
+	if err != nil {
+		log.Print(err)
+		return
+	}
+
+	ll := strings.Split(string(stdout), "\n")
+
+	for _, line := range ll {
+		lv := strings.Split(line, "|")
+		if len(lv) < 3 {
+            continue
+        }
+		v, err := strconv.ParseFloat(strings.Trim(lv[1], " "), 64)
+		if err == nil {
+			name := strings.ToLower(strings.Replace(strings.Trim(lv[0], " "), " ", "_", -1))
+			unit := strings.Trim(lv[2], " ")
+			if unit == "Volts" {
+			    unit = "V"
+			} else if unit == "degrees C" {
+			    unit = "C"
+			} else if unit == "degrees F" {
+			    unit = "F"
+			} else if unit == "Watts" {
+			    unit = "W"
+			}
+			
+			y, err := lp.New(name, map[string]string{"unit": unit, "type" : "node"}, map[string]interface{}{"value": v}, time.Now())
+			if err == nil {
+				*out = append(*out, y)
+			}
+		}
+	}
+}
+
+func ReadIpmiSensors(cmd string, out *[]lp.MutableMetric) {
+
+	command := exec.Command(cmd, "--comma-separated-output", "--sdr-cache-recreate")
+	command.Wait()
+	stdout, err := command.Output()
+	if err != nil {
+		log.Print(err)
+		return
+	}
+
+	ll := strings.Split(string(stdout), "\n")
+
+	for _, line := range ll {
+		lv := strings.Split(line, ",")
+		if len(lv) > 3 {
+		    v, err := strconv.ParseFloat(lv[3], 64)
+		    if err == nil {
+			    name := strings.ToLower(strings.Replace(lv[1], " ", "_", -1))
+			    y, err := lp.New(name, map[string]string{"unit": lv[4], "type" : "node"}, map[string]interface{}{"value": v}, time.Now())
+			    if err == nil {
+				    *out = append(*out, y)
+			    }
+		    }
+		}
+	}
+}
+
+func (m *IpmiCollector) Read(interval time.Duration, out *[]lp.MutableMetric) {
+    if len(m.config.IpmitoolPath) > 0 {
+	    _, err := os.Stat(m.config.IpmitoolPath)
+	    if err == nil {
+		    ReadIpmiTool(m.config.IpmitoolPath, out)
+		}
+	} else if len(m.config.IpmisensorsPath) > 0 {
+	    _, err := os.Stat(m.config.IpmisensorsPath)
+		if err == nil {
+			ReadIpmiSensors(m.config.IpmisensorsPath, out)
+		}
+	}
+}
+
+func (m *IpmiCollector) Close() {
+	m.init = false
+	return
+}

metric-collector.go

@@ -30,6 +30,7 @@ var Collectors = map[string]collectors.MetricGetter{
 	"nvidia":     &collectors.NvidiaCollector{},
 	"customcmd":  &collectors.CustomCmdCollector{},
 	"diskstat":   &collectors.DiskstatCollector{},
+	"ipmistat" :  &collectors.IpmiCollector{},
 }
 
 var Sinks = map[string]sinks.SinkFuncs{