procstat: fix newlines in tags

plugins/inputs/procstat/procstat.go

@@ -136,7 +136,7 @@ func (p *Procstat) pidsFromFile() ([]int32, error) {
 			out = append(out, int32(pid))
 			p.tagmap[int32(pid)] = map[string]string{
 				"pidfile": p.PidFile,
-				"pid":     string(pidString),
+				"pid":     strings.TrimSpace(string(pidString)),
 			}
 		}
 	}

plugins/inputs/procstat/spec_processor.go

@@ -1,7 +1,6 @@
 package procstat
 
 import (
-	"fmt"
 	"time"
 
 	"github.com/shirou/gopsutil/process"
@@ -17,21 +16,6 @@ type SpecProcessor struct {
 	proc   *process.Process
 }
 
-func (p *SpecProcessor) add(metric string, value interface{}) {
-	var mname string
-	if p.Prefix == "" {
-		mname = metric
-	} else {
-		mname = p.Prefix + "_" + metric
-	}
-	p.fields[mname] = value
-}
-
-func (p *SpecProcessor) flush() {
-	p.acc.AddFields("procstat", p.fields, p.tags)
-	p.fields = make(map[string]interface{})
-}
-
 func NewSpecProcessor(
 	prefix string,
 	acc telegraf.Accumulator,
@@ -51,90 +35,58 @@ func NewSpecProcessor(
 }
 
 func (p *SpecProcessor) pushMetrics() {
-	p.pushNThreadsStats()
-	p.pushFDStats()
-	p.pushCtxStats()
-	p.pushIOStats()
-	p.pushCPUStats()
-	p.pushMemoryStats()
-	p.flush()
-}
+	fields := map[string]interface{}{}
 
-func (p *SpecProcessor) pushNThreadsStats() error {
 	numThreads, err := p.proc.NumThreads()
-	if err != nil {
-		return fmt.Errorf("NumThreads error: %s\n", err)
-	}
-	p.add("num_threads", numThreads)
-	return nil
+	if err == nil {
+		fields["num_threads"] = numThreads
 	}
 
-func (p *SpecProcessor) pushFDStats() error {
 	fds, err := p.proc.NumFDs()
-	if err != nil {
-		return fmt.Errorf("NumFD error: %s\n", err)
-	}
-	p.add("num_fds", fds)
-	return nil
+	if err == nil {
+		fields["num_fds"] = fds
 	}
 
-func (p *SpecProcessor) pushCtxStats() error {
 	ctx, err := p.proc.NumCtxSwitches()
-	if err != nil {
-		return fmt.Errorf("ContextSwitch error: %s\n", err)
-	}
-	p.add("voluntary_context_switches", ctx.Voluntary)
-	p.add("involuntary_context_switches", ctx.Involuntary)
-	return nil
+	if err == nil {
+		fields["voluntary_context_switches"] = ctx.Voluntary
+		fields["involuntary_context_switches"] = ctx.Involuntary
 	}
 
-func (p *SpecProcessor) pushIOStats() error {
 	io, err := p.proc.IOCounters()
-	if err != nil {
-		return fmt.Errorf("IOCounters error: %s\n", err)
-	}
-	p.add("read_count", io.ReadCount)
-	p.add("write_count", io.WriteCount)
-	p.add("read_bytes", io.ReadBytes)
-	p.add("write_bytes", io.WriteCount)
-	return nil
+	if err == nil {
+		fields["read_count"] = io.ReadCount
+		fields["write_count"] = io.WriteCount
+		fields["read_bytes"] = io.ReadBytes
+		fields["write_bytes"] = io.WriteCount
 	}
 
-func (p *SpecProcessor) pushCPUStats() error {
 	cpu_time, err := p.proc.CPUTimes()
-	if err != nil {
-		return err
+	if err == nil {
+		fields["cpu_time_user"] = cpu_time.User
+		fields["cpu_time_system"] = cpu_time.System
+		fields["cpu_time_idle"] = cpu_time.Idle
+		fields["cpu_time_nice"] = cpu_time.Nice
+		fields["cpu_time_iowait"] = cpu_time.Iowait
+		fields["cpu_time_irq"] = cpu_time.Irq
+		fields["cpu_time_soft_irq"] = cpu_time.Softirq
+		fields["cpu_time_steal"] = cpu_time.Steal
+		fields["cpu_time_stolen"] = cpu_time.Stolen
+		fields["cpu_time_guest"] = cpu_time.Guest
+		fields["cpu_time_guest_nice"] = cpu_time.GuestNice
 	}
-	p.add("cpu_time_user", cpu_time.User)
-	p.add("cpu_time_system", cpu_time.System)
-	p.add("cpu_time_idle", cpu_time.Idle)
-	p.add("cpu_time_nice", cpu_time.Nice)
-	p.add("cpu_time_iowait", cpu_time.Iowait)
-	p.add("cpu_time_irq", cpu_time.Irq)
-	p.add("cpu_time_soft_irq", cpu_time.Softirq)
-	p.add("cpu_time_steal", cpu_time.Steal)
-	p.add("cpu_time_stolen", cpu_time.Stolen)
-	p.add("cpu_time_guest", cpu_time.Guest)
-	p.add("cpu_time_guest_nice", cpu_time.GuestNice)
 
 	cpu_perc, err := p.proc.CPUPercent(time.Duration(0))
-	if err != nil {
-		return err
-	} else if cpu_perc == 0 {
-		return nil
-	}
-	p.add("cpu_usage", cpu_perc)
-
-	return nil
+	if err == nil && cpu_perc != 0 {
+		fields["cpu_usage"] = cpu_perc
 	}
 
-func (p *SpecProcessor) pushMemoryStats() error {
 	mem, err := p.proc.MemoryInfo()
-	if err != nil {
-		return err
+	if err == nil {
+		fields["memory_rss"] = mem.RSS
+		fields["memory_vms"] = mem.VMS
+		fields["memory_swap"] = mem.Swap
 	}
-	p.add("memory_rss", mem.RSS)
-	p.add("memory_vms", mem.VMS)
-	p.add("memory_swap", mem.Swap)
-	return nil
+
+	p.acc.AddFields("procstat", fields, p.tags)
 }